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Catalyst materials for solar refineries, synthetic fuels and
procedures for a circular economy of the CO2
J.R.Morante
IREC...
Nowadays, the circular economy of carbon dioxide constitutes
one of the major world challenges.
Climatic change
CO2 emissi...
The conversion of CO2 into value-added chemicals and/or fuels, using
renewable energy and earth-abundant elements as well ...
 Carbon dioxide closed loop in which this molecule is captured,
reduced and oxidized continuously defining an ideal circu...
Closed loop CO2-CH4
 Carbon dioxide reduction by thermochemical or plasma
procedures which are open new alternatives to the
methanation proce...
EELS chemical composition maps obtained from the red
rectangled area of the STEM-HAADF micrograph. Individual Ce
(red), Zr...
Mesoporous
Bioconversion: Synthetic natural gas production from biogas in
a waste water treatment plant
In collaboration with Naturgy...
Demonstration unit [Sabadell (Barcelona) Spain)
Digestor
GasometerBiogas
Methanation unit
CO2 + 4H2 –> CH4 + 2H2O
Alkaline electrolyzer
37 kWh
Biogas source (55-65% CH4)
H2S cleaning
CH4
CO2
CO2 ...
Methanation reactors
Compact
reactor technology
Quick start-up
and shut-down times
Load-flexibility
T depends on time, len...
Injectable conditions in the gas pipeline are achievable in Sabadell
stream H2 CH4 CO2 XCO2
% % % %
inlet 66 - 33 0
middle...
Fin de semana
Intermedia
Carga
Punta
Base
Eólica
Fotovoltaica
Demanda
Solar concentración
Carga
21% RENEWABLE
SURPLUS OF E...
http://www.grtgaz.com/fileadmin/transition_energetique/documents/hydrogene_et_reseau_e-
cube_GRTgaz.pdf
http://www.grtgaz....
Source: IRES (Fraunhofer presentation) + IREC
Methanation: Solar Hydrogen +CO2
Renewable energy +feed stocks (H2, CO2)
100%
Feed stocks managements
95% Efficiency 95%; ...
Dark
(or under illumination)
Carbon dioxide reduction by electrochemical (dark and photo)
procedures NEW RESEARCH
ALTERNATIVE
DARK PHOTO
Reduced
CO2 pr...
Dark
Under illumination
PHOTO
EFFECT
Two challenges:
• Current density
• Bias reduction
efficient solar induced bias free working mode of a PEC cell
If curves intersect, there is enough
potential for bias free ...
Hybrid photoanode-photocathode device for bias-free water splitting
Photoanode: Hematite, TiO2
Photocathode:
• a-Si:H tand...
Data source: F. Urbain et al. 2016&2018
System consists of two polymer electrolyte membrane electrolysers in series
with one InGaP/GaAs/GaInNAsSb triple-junction ...
The TiO2-protected III–V tandem
device exhibited a solar-to-hydrogen
conversion efficiency, STH, of
10.5% under 1 sun illu...
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
0
5
10
15
20
IBC UPC +Ni epox + Ni/Pt PEC H2SO4
IBC UPC +Ni epox + Ni/Pt PV
HC-STH(%)
...
Artificial
photosynthesis:
solar refinery
Photons
Fuel
Added Value Chemicals
Solar heat
Solar electricity
H2O pipeline
CO2 pipeline
Activation Mechanisms for
H2O an...
Electrolyzers/
Co-electrolysis
.
12-20%
>10%
< 65% operation
Solar fuels
<1€/Wp
<6c€/kWh < 6c€/Kwh
photons
electrons chemi...
centralized
or
distributed
Where and how to install the
electrochemical part?
20%
19%
11%
20%
> 17%
> 17%
ELECTRICIDAD GAS
Overpotentials at several
tens of mA/cm2 ?
Overpotentials at several
tens of A/cm2 ?
Electrodes:
Voltage cell:
LHV 1,23/1,...
PEC/EC ANODEEC CATHODE
3D
Nanostructured
Cathode
with Catalyst
Strong interest in
having back
illumination especially
for ...
The final energy balance as well as the
overall efficiency and productivity depend,
aside of the system design constraints...
Carbon dioxide can give rise to different reduction reactions
pathways with several sub products. .
CO2 Reduction Products...
CO2
Electrocatalysts reduce the overpotential of reactions through formation of
intermediates. Therefore, elucidating the ...
CO2 reduction by metal electrocatalysis
*Source : J. Chem. SOC., Faraday Trans. I, 1989, 85(8), 2309-2326
Chem. Asian J. 2...
Gas Diffusion Electrodes
Electrolyte
Planar
Planar electrode Gas diffusion electrode
Catalyst particles
Electrolyte
CO2
ch...
Toray Carbon Paper TGP-H-60 after Cu deposition
JOURNAL OF PHYSICAL CHEMISTRY C
119 ,33 , pp18835-18842 (2015)
fibers after deposition of Sn
APPLIED CATALYSIS B-ENVIRONMENTAL
150 pp 57-62 (2014)
INTERNATIONAL JOURNAL OF HYDROGEN
ENER...
Electrodeposited Sn in GDE
E. Irtem, J.R. Morante, et al. J. Mater. Chem. A. 2016, 4, 13582.
Dark Electrolysis
Sn catalyst...
Dark Electrolysis
Sn catalyst  Formic acid
• F.E.% HCOO− = 71 ± 1.1 %
• F.E.% HCOO− + CO = 82 ± 2.0 % of total CO2 conver...
100 1000 10000
10
100
1000activity(mol/(g*s))
grain radius (nm)
Pulsed Electro Deposition
different duty cycle
Continuous ...
JOURNAL OF MATERIALS CHEMISTRY A ,
4, 35, pp 13582-13588 (2016)
CO2 + 2e-  •CO2
-
CO2 + 2H+ + 2e-  HCOOH
CO2 + 2H+ + 2e-  CO + H2O
CO2 + 4H+ + 4e-  HCHO+ H2O
CO2 + 6H+ + 6e-  CH3OH+...
CO2 Reduction Catalysts
Zn
J. Lee, et al. Chem. Asian J. 2009, 4, 1516-1523.
Syngas
Electrodeposition of Zn on Cu Foam
bare Cu foam 1M ZnSO4
Cu foam coated with ZnZn flakes
CE
foam
Structural Analysis of Zn Flakes
Zn
ZnO
Zn
High activity towards
CO2 reduction
Electrochemical Characterization
after 1 h electrolysis
Good stability in 0.5 M
KHCO3
...
5:1 ≥ H2:CO ≥
0.5:1
FEmax (CO) = 85 %
jCO = 39.4 mA/cm2
Electrochemical Characterization
F. Urbain, J.R. Morante, et al. E...
CO2 Reduction Catalysts
Zn
J. Lee, et al. Chem. Asian J. 2009, 4, 1516-1523.
Syngas
ACS applied materials and interfaces (2018)
ENERGY & ENVIRONMENTAL
SCIENCE 10 , 10, 2256 (2017)
Dark and Solar CO2 Reduction Device
Role of the anode
V
[H2(g)]
[CO(g)]
e-
h+
OH-
Na+
O2
Working Mode of Stack Flow Cell
CATHODE | CO2 reduction reaction (CO2R)
CO2 aq. +2H+
+ ...
0,0 0,4 0,8 1,2 1,6 2,0
5
10
15
20
25
30
35currentdensityj[mA/cm2
]
0.5 m KOH
20 mV/s
potential E vs. RHE [V]
Energy Envir...
DARK
LIGHT
JOURNAL OF PHYSICS D-APPLIED PHYSICS
50 ,10, 104003 (2017)
JOURNAL OF MATERIALS CHEMISTRY A
4 ,42, pp 16706-167...
CoFe nanoparticles are prepared by
1 mmol Iron acetylacetonate
1mmol Cobalt acetylacetonate ,
10 ml oleylamine,
1.0 ml oil...
0 2 4 6 8
20
30
40
50
60
70
80
90
100
mA
numer of dips/ mg
dips
mg
Particles size <8nm
Our
CoFe
CoFe on Ni
foam: Our
results Ƞ (EC)= 1,23/1,5= 82%
Ƞ (PV)= 23%
Ƞ total > 18,86%
10mA/cm2
Conclusions:
advances in catalysi...
Research must bring
solutions to have VERY LONG
STABILITY . it IS
A KEY Issue for pec systems
and it depends on the
materi...
Catalonia Institute
for
Energy Research
New call for PhD EU
program Marie Curie
https://projects.icmab.es/docfam/
jrmorant...
Thank you.
Thanks to:
Teresa Andreu
F. Urbain
J.Arbiol
Pengyi Tan
C.Ros
N.Carretero
M. Biset
Catalyst materials for solar refineries, synthetic fuels and procedures for a circular economy of the CO2.
Catalyst materials for solar refineries, synthetic fuels and procedures for a circular economy of the CO2.
Catalyst materials for solar refineries, synthetic fuels and procedures for a circular economy of the CO2.
Catalyst materials for solar refineries, synthetic fuels and procedures for a circular economy of the CO2.
Catalyst materials for solar refineries, synthetic fuels and procedures for a circular economy of the CO2.
Catalyst materials for solar refineries, synthetic fuels and procedures for a circular economy of the CO2.
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Catalyst materials for solar refineries, synthetic fuels and procedures for a circular economy of the CO2.

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Plenary lecture given by Joan Ramón Morante (IREC) at the XVII B-MRS Meeting, in Natal (Brazil), on September 20, 2018.

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Catalyst materials for solar refineries, synthetic fuels and procedures for a circular economy of the CO2.

  1. 1. Catalyst materials for solar refineries, synthetic fuels and procedures for a circular economy of the CO2 J.R.Morante IREC, Catalonia Institute for Energy Research, Plaça de les Dones de Negre,1. Sant Adrià del Besòs, 08930. Spain. Department of Electronics, University of Barcelona, C/Martí i Franquès,1. Barcelona,08028. Spain. H2 O2
  2. 2. Nowadays, the circular economy of carbon dioxide constitutes one of the major world challenges. Climatic change CO2 emissions
  3. 3. The conversion of CO2 into value-added chemicals and/or fuels, using renewable energy and earth-abundant elements as well as environmental friendly materials is a key priority.
  4. 4.  Carbon dioxide closed loop in which this molecule is captured, reduced and oxidized continuously defining an ideal circular economy of the CO2 Fossil gas CO2 emissions Methanation based on Paul Sabatier reactor.
  5. 5. Closed loop CO2-CH4
  6. 6.  Carbon dioxide reduction by thermochemical or plasma procedures which are open new alternatives to the methanation process Patent: P201530109 300mg of catalyst, corresponding to an GHSV of 20000, the reactor is supplied with a mixture of carbon dioxide and hydrogen (20% vol CO2) with a total flow rate of 12000 ml/h), at atmospheric pressure and at temperature of 20°C Journal of CO₂ Utilization 26 (2018) 202–211
  7. 7. EELS chemical composition maps obtained from the red rectangled area of the STEM-HAADF micrograph. Individual Ce (red), Zr (green) and Ni (blue) maps and their composite. It should be noted here that we have normalized the intensity values of the maps to that of Ce to have a better comparison
  8. 8. Mesoporous
  9. 9. Bioconversion: Synthetic natural gas production from biogas in a waste water treatment plant In collaboration with Naturgy programa RIS3CAT ENERGY CONVERSION AND MANAGEMENT 162 pp 218-224 (2018)
  10. 10. Demonstration unit [Sabadell (Barcelona) Spain) Digestor GasometerBiogas
  11. 11. Methanation unit CO2 + 4H2 –> CH4 + 2H2O Alkaline electrolyzer 37 kWh Biogas source (55-65% CH4) H2S cleaning CH4 CO2 CO2 source 10 Nm3/h
  12. 12. Methanation reactors Compact reactor technology Quick start-up and shut-down times Load-flexibility T depends on time, length T < 500ºC High technology
  13. 13. Injectable conditions in the gas pipeline are achievable in Sabadell stream H2 CH4 CO2 XCO2 % % % % inlet 66 - 33 0 middle 30 65 10 90,85 outlet 4,4 95,4 0,2 99,77 Electric consumption SNG production Efficiency PtG XCO2 kWh Nm3/h kWh/Nm3 kWout/kWin % Test 1 16,24 0,577 28,15 38,06 96,99 Test 2 15,84 0,536 29,58 36,13 97,75 Test 3 12,16 0,519 23,00 46,55 97,61 kWout/kWin > 50% can be achieved within this project 85-95% power consumption comes from hydrogen production, nevertheless surplus renewal energy production can be used. Performant catalysts are the clue
  14. 14. Fin de semana Intermedia Carga Punta Base Eólica Fotovoltaica Demanda Solar concentración Carga 21% RENEWABLE SURPLUS OF ENERGY ENERGY CONSUMPTION DURING A WEEK 60% renovables WIND ENERGY SOLAR ENERGY WITHOUT RENEWABLES
  15. 15. http://www.grtgaz.com/fileadmin/transition_energetique/documents/hydrogene_et_reseau_e- cube_GRTgaz.pdf http://www.grtgaz.com/fileadmin/engagements/documents/fr/Power-to-Gas-etude-ADEME-GRTgaz-GrDF- complete.pdf
  16. 16. Source: IRES (Fraunhofer presentation) + IREC
  17. 17. Methanation: Solar Hydrogen +CO2 Renewable energy +feed stocks (H2, CO2) 100% Feed stocks managements 95% Efficiency 95%; loss 5% Methanation 76% Efficiency 80%; loss 19% Compressor, storage and CH4 pipe 74,5% Efficiency 98,5%; loss 1.5% Gas transport (500Km) Efficiency 99,55%, loss 0,37% 74,1% Methanation: Solar Hydrogen+CO2
  18. 18. Dark (or under illumination)
  19. 19. Carbon dioxide reduction by electrochemical (dark and photo) procedures NEW RESEARCH ALTERNATIVE DARK PHOTO Reduced CO2 products High current densities Centralizer electrolyzer. Current densities of PV cell. Distributed electrolyzer. Future depends on cost and social acceptation
  20. 20. Dark Under illumination PHOTO EFFECT Two challenges: • Current density • Bias reduction
  21. 21. efficient solar induced bias free working mode of a PEC cell If curves intersect, there is enough potential for bias free working mode of the cell. All that matters is the current Jop at the intersection. Source: several+IREC E red E oxd
  22. 22. Hybrid photoanode-photocathode device for bias-free water splitting Photoanode: Hematite, TiO2 Photocathode: • a-Si:H tandem with Ni as HER catalyst • a-Si:H/a-Si:H/µc-Si:H triple with Ni catalys Electrolyte: 1M NaOH Stability of stand-alone hybrid Hematite/Tandem device 2-electrode config. 0 V applied biashematite a-Si:H tandemO2 H2 To be published
  23. 23. Data source: F. Urbain et al. 2016&2018
  24. 24. System consists of two polymer electrolyte membrane electrolysers in series with one InGaP/GaAs/GaInNAsSb triple-junction solar cell, which produces a large-enough voltage to drive both electrolysers with no additional energy input. The system achieves a 48-h average STH efficiency of 30% Nat Comm 2016,7,13237 Very expensive Use scarce materials.
  25. 25. The TiO2-protected III–V tandem device exhibited a solar-to-hydrogen conversion efficiency, STH, of 10.5% under 1 sun illumination, with stable performance for > 40 h Energy Environ. Sci., 2015, 8, 3166
  26. 26. 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 5 10 15 20 IBC UPC +Ni epox + Ni/Pt PEC H2SO4 IBC UPC +Ni epox + Ni/Pt PV HC-STH(%) E (V vs RHE) 50cm2 area 0,650 40mA/cm2 STH >15% PATENT:15382658.1 PEC PV ACS APPLIED MATERIALS & INTERFACES 10 (16) pp: 13425-13433 (2018) Our results:
  27. 27. Artificial photosynthesis: solar refinery
  28. 28. Photons Fuel Added Value Chemicals Solar heat Solar electricity H2O pipeline CO2 pipeline Activation Mechanisms for H2O and CO2 reduction Fossil fuel power plant Fischer Tropsch Water Thermo-chemical Thermolysis Photolysis Photo-catalysis CO2 Capture Photo-electro-chemical Electro-chemical Solar Refinery Chemical Storage & CO2 Circular Economy biogenic carbon
  29. 29. Electrolyzers/ Co-electrolysis . 12-20% >10% < 65% operation Solar fuels <1€/Wp <6c€/kWh < 6c€/Kwh photons electrons chemicals Data source: IREC
  30. 30. centralized or distributed Where and how to install the electrochemical part? 20% 19% 11% 20% > 17% > 17%
  31. 31. ELECTRICIDAD GAS
  32. 32. Overpotentials at several tens of mA/cm2 ? Overpotentials at several tens of A/cm2 ? Electrodes: Voltage cell: LHV 1,23/1,5 ~ 82% HHV 1,48/1,5 ~ 98% 1,23/2,3 ~ 55% Less transportation losses Example considering H2
  33. 33. PEC/EC ANODEEC CATHODE 3D Nanostructured Cathode with Catalyst Strong interest in having back illumination especially for replacing electroreduction by photoelectroreduction of CO2. ELECTROCHIMICA ACTA 240 pp 225-230 (2017) For CO2: Cathode with appropriate catalyst Anode with excellent OER.
  34. 34. The final energy balance as well as the overall efficiency and productivity depend, aside of the system design constraints, of parameters as the over-potential values, charge transfer resistances linked to the role played by the catalyst. ELECTROCHIMICA ACTA 240 pp 225-230 (2017) PATENT: P3146EP00 PEC system for solar fuels
  35. 35. Carbon dioxide can give rise to different reduction reactions pathways with several sub products. . CO2 Reduction Products CO2 + 2e-  •CO2 - CO2 + 2H+ + 2e-  HCOOH CO2 + 2H+ + 2e-  CO + H2O CO2 + 4H+ + 4e-  HCHO+ H2O CO2 + 6H+ + 6e-  CH3OH+ H2O CO2 + 8H+ + 8e-  CH4 + 2H2O 2H2O + 4h+  O2 + 4H+ 2H+ + 2e-  H2
  36. 36. CO2 Electrocatalysts reduce the overpotential of reactions through formation of intermediates. Therefore, elucidating the intermediates is a crucial requirement for rational design of novel catalysts that overcome the current limitations. So, one of the objective must tackle this knowledge gap by high-risk–high-gain approaches to prepare catalytic intermediates on oxides
  37. 37. CO2 reduction by metal electrocatalysis *Source : J. Chem. SOC., Faraday Trans. I, 1989, 85(8), 2309-2326 Chem. Asian J. 2009,4, 1516-1523  Stabilization of CO2 •– intermediate = high energy efficiency.  Three groups depending on the binding strength + High HER overpotential CO desorption before reduction + Low HER overpotential HCOOH formation Weak CO adsorption Strong CO adsorption + Low HER overpotential CO poisoning Optimum CO adsorption CO reduction Intermediate steps of CO2R i.e. protonation *CHO or *COH 2 1 3 1
  38. 38. Gas Diffusion Electrodes Electrolyte Planar Planar electrode Gas diffusion electrode Catalyst particles Electrolyte CO2 chamber GDE • Active surface area ≈ geometric surface area • Limited CO2 solubility = Mass transfer problem • Active surface area >> geometric surface area • Improved CO2 transfer = overcome solubility problem
  39. 39. Toray Carbon Paper TGP-H-60 after Cu deposition JOURNAL OF PHYSICAL CHEMISTRY C 119 ,33 , pp18835-18842 (2015)
  40. 40. fibers after deposition of Sn APPLIED CATALYSIS B-ENVIRONMENTAL 150 pp 57-62 (2014) INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 38,7, 2979-2985 (2013) APPLIED PHYSICS LETTERS 99 ,26 ;262102 (2011)
  41. 41. Electrodeposited Sn in GDE E. Irtem, J.R. Morante, et al. J. Mater. Chem. A. 2016, 4, 13582. Dark Electrolysis Sn catalyst  Formic acid
  42. 42. Dark Electrolysis Sn catalyst  Formic acid • F.E.% HCOO− = 71 ± 1.1 % • F.E.% HCOO− + CO = 82 ± 2.0 % of total CO2 conversion (CO: 6 ± 4.5 %) • Low Tafel slope value = faster charge transfer of CO2 reduction on Sn-GDE • Evidence of a rapid transfer of the initial electron • Evidence of a different rate determining step = concurrent proton−electron uptake 𝑭. 𝑬. % = 𝑛 · 𝐹 · [𝐶 𝐼 · 𝑡 -0.4 -0.6 -0.8 -1.0 -1.2 0 20 40 60 80 100 HCOO CO E (VRHE ) FaradaicEff.(%) H2 -2 -1 0 -0.3 -0.4 -0.5 -0.6 -0.7 H2 254 mV dec -1 E(VRHE ) log ji (mAcm-2 ) -3 -2 -1 0 -0.4 -0.5 -0.6 -0.7 HCOO 89 mVdec-1 CO 78 mVdec-1 E(VRHE ) log ji (mAcm-2 ) E. Irtem, J.R. Morante, et al. J. Mater. Chem. A. 2016, 4, 13582.
  43. 43. 100 1000 10000 10 100 1000activity(mol/(g*s)) grain radius (nm) Pulsed Electro Deposition different duty cycle Continuous Electrodeposition different samples slope -1 Using other catalysts for formic acid submitted
  44. 44. JOURNAL OF MATERIALS CHEMISTRY A , 4, 35, pp 13582-13588 (2016)
  45. 45. CO2 + 2e-  •CO2 - CO2 + 2H+ + 2e-  HCOOH CO2 + 2H+ + 2e-  CO + H2O CO2 + 4H+ + 4e-  HCHO+ H2O CO2 + 6H+ + 6e-  CH3OH+ H2O CO2 + 8H+ + 8e-  CH4 + 2H2O 2H2O + 4h+  O2 + 4H+ 2H+ + 2e-  H2 CO2 Reduction Products Syngas H2:CO ratio 3:1 Ammonia 2:1 Methanol 1:1 Oxo products 1:0 Hydrogen ... ... ...
  46. 46. CO2 Reduction Catalysts Zn J. Lee, et al. Chem. Asian J. 2009, 4, 1516-1523. Syngas
  47. 47. Electrodeposition of Zn on Cu Foam bare Cu foam 1M ZnSO4 Cu foam coated with ZnZn flakes CE foam
  48. 48. Structural Analysis of Zn Flakes Zn ZnO Zn
  49. 49. High activity towards CO2 reduction Electrochemical Characterization after 1 h electrolysis Good stability in 0.5 M KHCO3 F. Urbain, J.R. Morante, et al. Energy Environ. Sci. 2017, 10, 2256. J.R. Morante et al. Energy and Environmental Science10(10), pp. 2124-2136 (2017)
  50. 50. 5:1 ≥ H2:CO ≥ 0.5:1 FEmax (CO) = 85 % jCO = 39.4 mA/cm2 Electrochemical Characterization F. Urbain, J.R. Morante, et al. Energy Environ. Sci. 2017, 10, 2256.
  51. 51. CO2 Reduction Catalysts Zn J. Lee, et al. Chem. Asian J. 2009, 4, 1516-1523. Syngas
  52. 52. ACS applied materials and interfaces (2018) ENERGY & ENVIRONMENTAL SCIENCE 10 , 10, 2256 (2017)
  53. 53. Dark and Solar CO2 Reduction Device Role of the anode
  54. 54. V [H2(g)] [CO(g)] e- h+ OH- Na+ O2 Working Mode of Stack Flow Cell CATHODE | CO2 reduction reaction (CO2R) CO2 aq. +2H+ + 2e− ⟶ HCOOH(aq.) ANODE | H2O oxidation reaction (OER) H2O l ⟶ 2H+ + 1 2 O2 g + 2e− CELL REACTION 𝐂𝐎 𝟐 𝐠 + 𝐇 𝟐 𝐎 𝐥 ⟶ 𝐇𝐂𝐎𝐎𝐇(𝐚𝐪.) + 𝟏 𝟐 𝐎 𝟐 𝐠 Gas Pure CO2 0.5 M NaHCO3 0.1 M KHCO3 0.1 M KHCO3 0.5 M KOH 0.1 M KHCO3 0.1 M KOH Membrane Catholyte AnolyteNafion (CEM/Na+) Selemion (AEM/OH-) Nafion (CEM/Na+) Sn-GDE Cu-GDE Cathode Metal oxide as TiO2 NRs/FTO or Other PV materials and nanostructures Anode ELECTROCHIMICA ACTA 240 pp 225-230 (2017)
  55. 55. 0,0 0,4 0,8 1,2 1,6 2,0 5 10 15 20 25 30 35currentdensityj[mA/cm2 ] 0.5 m KOH 20 mV/s potential E vs. RHE [V] Energy Environ. Sci., 8, 3242-3254, (2015) ACS Appl. Mater. Interfaces, 2016, 8, 4076 SOLAR ENERGY MATERIALS AND SOLAR CELLS 158 pp. 184-188 (2016) ACS CATALYSIS 8, 4, pp3331-3342 (2018) JOURNAL OF PHYSICALCHEMISTRY C 122,6,pp 3295-3304 (2018) ENERGY&ENVIRONMENTAL SCIENCE 10, 10, 2124(2017) ACS APPLIED MATERIALS& INTERFACES 9 ,21,17932 (2017) SOLAR ENERGY MATERIALS AND SOLAR CELLS 159 ,456-466 (2017) APPLIED CATALYSIS B-ENVIRONMENTAL 189 pp133-140 (2016)
  56. 56. DARK LIGHT JOURNAL OF PHYSICS D-APPLIED PHYSICS 50 ,10, 104003 (2017) JOURNAL OF MATERIALS CHEMISTRY A 4 ,42, pp 16706-16713 (2016) JOURNAL OF MATERIALS CHEMISTRY A 2 ,32, pp 12708-12716 (2014)
  57. 57. CoFe nanoparticles are prepared by 1 mmol Iron acetylacetonate 1mmol Cobalt acetylacetonate , 10 ml oleylamine, 1.0 ml oil acid mixed in a three-neck flask. The solution was increased to 80 °C and degased for 1hour. Then the temperature was increased to 230°/ 300º with continuously nitrogen pumping and maintained at the selected temperature for 0.5 h. After reaction, the received samples were thoroughly purified by precipitation and redispersion steps. CHEMSUSCHEM 11, 1, pp 125-129 (2018) JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 138, 49 pp 16037-16045 (2016) ACS APPLIED MATERIALS & INTERFACES 8, 43,pp 29461-29469 (2016) ACS APPLIED MATERIALS & INTERFACES 8,27,pp 17435-17444 (2016)
  58. 58. 0 2 4 6 8 20 30 40 50 60 70 80 90 100 mA numer of dips/ mg dips mg Particles size <8nm
  59. 59. Our CoFe
  60. 60. CoFe on Ni foam: Our results Ƞ (EC)= 1,23/1,5= 82% Ƞ (PV)= 23% Ƞ total > 18,86% 10mA/cm2 Conclusions: advances in catalysis help to implement new technologies to develop an eficient low cost circular CO2 economy. NATURE ENERGY | VOL 1 | MAY 2016 | 1-8
  61. 61. Research must bring solutions to have VERY LONG STABILITY . it IS A KEY Issue for pec systems and it depends on the material developers New materials, specially catalysts, for Dark or Photo electrolysis of CO2 will deploy many new disruptive ideas in the field of energy Science must guide the new energy challenges of our society
  62. 62. Catalonia Institute for Energy Research New call for PhD EU program Marie Curie https://projects.icmab.es/docfam/ jrmorante@irec.cat
  63. 63. Thank you. Thanks to: Teresa Andreu F. Urbain J.Arbiol Pengyi Tan C.Ros N.Carretero M. Biset

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