期刊
CATALYSIS TODAY
卷 244, 期 -, 页码 58-62出版社
ELSEVIER
DOI: 10.1016/j.cattod.2014.08.001
关键词
Electrocatalysis; CO2 reduction; Palladium-platinum catalysts; Formic acid
资金
- NanoNextNL
- Smart Mix Program of the Netherlands Ministry of Economic Affairs
- Netherlands Ministry of Education, Culture and Science
The electrochemical reduction of CO2 is a reaction of much current interest as a possible reaction for energy storage. In this paper, we show that on electrodeposited palladium on platinum, a good formic acid oxidation catalyst, the onset potential for CO2 reduction to formic acid is dramatically reduced incomparison to bulk palladium. Two different reaction pathways are observed; a pathway at low overpotential in which formic acid is produced from either direct bicarbonate reduction or from the reduction of CO2 generated from bicarbonate near the surface, and a pathway at more negative potentials where formic acid is produced from direct CO2 reduction. Furthermore, we show that reversible formic acid oxidation and CO2 reduction is possible on this catalyst, although unfortunately the processes are hindered by poisoning of the catalyst, most likely by CO. (C) 2014 Elsevier B.V. All rights reserved.
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