Nano-crumples induced Sn-Bi bimetallic interface pattern with moderate electron bank for highly efficient CO2 electroreduction

Bohua Ren, Guobin Wen, Rui Gao, Dan Luo, Zhen Zhang, Weibin Qiu, Qianyi Ma, Xin Wang (), Yi Cui, Luis Ricardez–Sandoval (), Aiping Yu () and Zhongwei Chen ()
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Bohua Ren: South China Normal University
Guobin Wen: South China Normal University
Rui Gao: University of Waterloo
Dan Luo: South China Normal University
Zhen Zhang: University of Waterloo
Weibin Qiu: South China Normal University
Qianyi Ma: University of Waterloo
Xin Wang: South China Normal University
Yi Cui: Chinese Academy of Sciences
Luis Ricardez–Sandoval: University of Waterloo
Aiping Yu: University of Waterloo
Zhongwei Chen: University of Waterloo

Nature Communications, 2022, vol. 13, issue 1, 1-11

Abstract: Abstract CO2 electroreduction reaction offers an attractive approach to global carbon neutrality. Industrial CO2 electrolysis towards formate requires stepped-up current densities, which is limited by the difficulty of precisely reconciling the competing intermediates (COOH* and HCOO*). Herein, nano-crumples induced Sn-Bi bimetallic interface-rich materials are in situ designed by tailored electrodeposition under CO2 electrolysis conditions, significantly expediting formate production. Compared with Sn-Bi bulk alloy and pure Sn, this Sn-Bi interface pattern delivers optimum upshift of Sn p-band center, accordingly the moderate valence electron depletion, which leads to weakened Sn-C hybridization of competing COOH* and suitable Sn-O hybridization of HCOO*. Superior partial current density up to 140 mA/cm2 for formate is achieved. High Faradaic efficiency (>90%) is maintained at a wide potential window with a durability of 160 h. In this work, we elevate the interface design of highly active and stable materials for efficient CO2 electroreduction.

Date: 2022
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DOI: 10.1038/s41467-022-29861-w

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