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Enhancing Activity and Reducing Cost for Electrochemical Reduction of CO 2 by Supporting Palladium on Metal Carbides

Journal Article · · Angewandte Chemie (International Edition)
 [1];  [2];  [3];  [3];  [3];  [3];  [4];  [4];  [2]
  1. Collaborative Innovation Center of Chemical Science and Engineering School of Chemical Engineering and Technology Tianjin University Tianjin 300072 P. R. China, Department of Chemical Engineering Columbia University 500 W. 120th St. New York NY 10027 USA
  2. Department of Chemical Engineering Columbia University 500 W. 120th St. New York NY 10027 USA, Chemistry Department Brookhaven National Laboratory Upton NY 11973 USA
  3. Department of Chemical Engineering Columbia University 500 W. 120th St. New York NY 10027 USA
  4. Collaborative Innovation Center of Chemical Science and Engineering School of Chemical Engineering and Technology Tianjin University Tianjin 300072 P. R. China

Abstract

Electrochemical CO 2 reduction reaction (CO 2 RR) with renewable electricity is a potentially sustainable method to reduce CO 2 emissions. Palladium supported on cost‐effective transition‐metal carbides (TMCs) are studied to reduce the Pd usage and tune the activity and selectivity of the CO 2 RR to produce synthesis gas, using a combined approach of studying thin films and practical powder catalysts, in situ characterization, and density functional theory (DFT) calculations. Notably, Pd/TaC exhibits higher CO 2 RR activity, stability and CO Faradaic efficiency than those of commercial Pd/C while significantly reducing the Pd loading. In situ measurements confirm the transformation of Pd into hydride (PdH) under the CO 2 RR environment. DFT calculations reveal that the TMC substrates modify the binding energies of key intermediates on supported PdH. This work suggests the prospect of using TMCs as low‐cost and stable substrates to support and modify Pd for enhanced CO 2 RR activity.

Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0009476; SC0009476
OSTI ID:
1504498
Journal Information:
Angewandte Chemie (International Edition), Journal Name: Angewandte Chemie (International Edition) Journal Issue: 19 Vol. 58; ISSN 1433-7851
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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