Journal
JOURNAL OF CATALYSIS
Volume 402, Issue -, Pages 229-237Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2021.08.021
Keywords
CO2 reduction; Nanoparticles; Catalysis; Electrocatalysis; Bimetallic particles; Intermetallic compounds
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Funding
- European Commission (Research Executive Agency) grant ELCOREL under the Marie Skodowska-Curie Innovative Trainings Network ELCoREL [722614]
- Spanish Ministry of Science and Innovation [RTI2018-101394-B-I00]
- Barcelona Supercomputing Center (BSC-RES)
- Marie Curie Actions (MSCA) [722614] Funding Source: Marie Curie Actions (MSCA)
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This study shows that by introducing indium into palladium-rich bimetallic particles, the selectivity and surface poisoning of CO2 electroreduction catalysts can be controlled. The research reveals the dependence of CO2 reduction selectivity on the composition of Pd-In nanoparticles, providing insight into developing cheap, selective, and poison-resistant catalysts for electrochemical applications.
CO2 electroreduction powered by renewable energy is an attractive strategy to close the carbon cycle. Among the possible reduction products, CO is of particular interest due to its large industrial applications. Transition metals in the Pt group are able to electrochemically reduce CO2 to CO, but suffer from CO surface poisoning, which causes a quick deactivation and overall sluggish kinetics. Here, we show that by introducing In to Pd-rich bimetallic particles we can tune the selectivity and limit the surface poisoning of these catalysts. The addition of large amounts of In blocks CO2 reduction activity and leads to a material selective for hydrogen evolution and insensitive to CO poisoning. This study provides insights into the dependence of CO2 reduction selectivity on the composition of Pd-In nanoparticles, revealing the effect that different phases have on catalytic activity. The application of similar screenings to other bimetallic systems can potentially yield cheap, selective, and poison-resistant catalysts for electrochemical applications. (C) 2021 Published by Elsevier Inc.
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