Exclusive Formation of Formic Acid from CO 2 Electroreduction by a Tunable Pd‐Sn Alloy

Conversion of carbon dioxide (CO 2 ) into fuels and chemicals by electroreduction has attracted significant interest, although it suffers from a large overpotential and low selectivity. A Pd‐Sn alloy electrocatalyst was developed for the exclusive conversion of CO 2 into formic acid in an aqueous so...

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Veröffentlicht in:Angewandte Chemie 2017-09, Vol.129 (40), p.12387-12391
Hauptverfasser: Bai, Xiaofang, Chen, Wei, Zhao, Chengcheng, Li, Shenggang, Song, Yanfang, Ge, Ruipeng, Wei, Wei, Sun, Yuhan
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container_issue 40
container_start_page 12387
container_title Angewandte Chemie
container_volume 129
creator Bai, Xiaofang
Chen, Wei
Zhao, Chengcheng
Li, Shenggang
Song, Yanfang
Ge, Ruipeng
Wei, Wei
Sun, Yuhan
description Conversion of carbon dioxide (CO 2 ) into fuels and chemicals by electroreduction has attracted significant interest, although it suffers from a large overpotential and low selectivity. A Pd‐Sn alloy electrocatalyst was developed for the exclusive conversion of CO 2 into formic acid in an aqueous solution. This catalyst showed a nearly perfect faradaic efficiency toward formic acid formation at the very low overpotential of −0.26 V, where both CO formation and hydrogen evolution were completely suppressed. Density functional theory (DFT) calculations suggested that the formation of the key reaction intermediate HCOO* as well as the product formic acid was the most favorable over the Pd‐Sn alloy catalyst surface with an atomic composition of PdSnO 2 , consistent with experiments.
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