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Designing Atomically Dispersed Au on Tensile-Strained Pd for Efficient CO2 Electroreduction to Formate

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Title
Designing Atomically Dispersed Au on Tensile-Strained Pd for Efficient CO2 Electroreduction to Formate
Author(s)
Jinsol Bok; Lee, Si Young; Byoung-Hoon Lee; Kim, Cheonghee; Nguyen, Dang Le Tri; Kim, Ji Won; Euiyeon Jung; Chan Woo Lee; Yoon Jung; Hyeon Seok Lee; Jiheon Kim; Kangjae Lee; Wonjae Ko; Young Seong Kim; Sung-Pyo Cho; Jong Suk Yoo; Taeghwan Hyeon; Yun Jeong Hwang
Publication Date
2021-04
Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.143, no.14, pp.5386 - 5395
Publisher
AMER CHEMICAL SOC
Abstract
Pd is one of the most effective catalysts for the electrochemical reduction of CO2 to formate, a valuable liquid product, at low overpotential. However, the intrinsically high CO affinity of Pd makes the surface vulnerable to CO poisoning, resulting in rapid catalyst deactivation during CO2 electroreduction. Herein, we utilize the interaction between metals and metal-organic frameworks to synthesize atomically dispersed Au on tensile-strained Pd nanoparticles showing significantly improved formate production activity, selectivity, and stability with high CO tolerance. We found that the tensile strain stabilizes all reaction intermediates on the Pd surface, whereas the atomically dispersed Au selectively destabilizes CO* without affecting other adsorbates. As a result, the conventional COOH* versus CO* scaling relation is broken, and our catalyst exhibits 26- and 31-fold enhancement in partial current density and mass activity toward electrocatalytic formate production with over 99% faradaic efficiency, compared to Pd/C at -0.25 V versus RHE.
URI
https://pr.ibs.re.kr/handle/8788114/9882
DOI
10.1021/jacs.0c12696
ISSN
0002-7863
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > 1. Journal Papers (저널논문)
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