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Title: Pseudocapacitance Facilitates the Electrocatalytic Reduction of Carbon Dioxide

Journal Article · · Advanced Energy Materials
ORCiD logo [1];  [2]; ORCiD logo [3];  [2]; ORCiD logo [4]
  1. Max Planck Inst. for Chemical Energy Conversion, Mülheim an der Ruhr (Germany); Fritz Haber Institute of the Max Planck Society, Berlin (Germany); ALBA Synchrotron Light Source, Cerdanyola del Valles (Spain)
  2. Max Planck Inst. for Chemical Energy Conversion, Mülheim an der Ruhr (Germany); Fritz Haber Institute of the Max Planck Society, Berlin (Germany)
  3. Fritz Haber Institute of the Max Planck Society, Berlin (Germany)
  4. Fritz Haber Institute of the Max Planck Society, Berlin (Germany); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Electroreduction of CO2 to value-added products is a promising strategy for CO2 reuse, where copper has a unique ability to produce oxygenates and C2+ products. Unfortunately, the electronic factors making copper so unique are unknown, which limits the ability to design improved catalysts. By combining in situ surface-sensitive X-ray resonant photoelectron spectroscopy with density functional theory calculations, the complex electronic structure of copper is uncovered during the electrocatalytic reduction of CO2. It is found that the pseudocapacitive charging of copper, produced by the incorporation of protons and electrons into the subsurface, facilitates the activation of CO2, while simultaneously increasing the barrier for H-H coupling. The net result is that cathodic pseudocapacitive charge suppresses the hydrogen evolution reaction and promotes the production of hydrocarbons and oxygenated products on copper. These results represent a new paradigm in the understanding of CO2 reduction, highlighting the key role of pseudocapacitive charge in the reaction.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
89233218CNA000001
OSTI ID:
2406660
Report Number(s):
LA-UR--24-23134
Journal Information:
Advanced Energy Materials, Journal Name: Advanced Energy Materials Journal Issue: 31 Vol. 14; ISSN 1614-6832
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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