Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

One-Step Electrochemical Dealloying of 3D Bi-continuous Micro-nano Porous Bismuth Electrodes and CO2RR Performance

Wenqin Lai
,
Yating Liu
,
Mingming Zeng
,
Dongmei Han
,
Min Xiao
ORCID logo ,
Shuanjin Wang
ORCID logo ,
Shan Ren
* ,
Yuezhong Meng
* ORCID logo
Version 1 : Received: 16 May 2023 / Approved: 16 May 2023 / Online: 16 May 2023 (07:18:47 CEST)

A peer-reviewed article of this Preprint also exists.

Lai, W.; Liu, Y.; Zeng, M.; Han, D.; Xiao, M.; Wang, S.; Ren, S.; Meng, Y. One-Step Electrochemical Dealloying of 3D Bi-Continuous Micro-Nanoporous Bismuth Electrodes and CO2RR Performance. Nanomaterials 2023, 13, 1767. Lai, W.; Liu, Y.; Zeng, M.; Han, D.; Xiao, M.; Wang, S.; Ren, S.; Meng, Y. One-Step Electrochemical Dealloying of 3D Bi-Continuous Micro-Nanoporous Bismuth Electrodes and CO2RR Performance. Nanomaterials 2023, 13, 1767.

Abstract

The rapid development of electrochemical CO2 reduction offers a promising route to convert in-termittent renewable energy into products of high value-added fuels or chemical feedstocks. However, low faradaic efficiency, low current density, and a narrow potential range still limited the large-scale application of CO2RR electrocatalyst. Herein, monolith 3D bi-continuous nano-porous Bismuth (np-Bi) electrodes are fabricated via a simple one-step electrochemical dealloying strategy from Pb-Bi binary alloy. The unique bi-continuous porous structure ensures highly effective charge transfer, meanwhile the controllable millimeter-size geometric porous structure enables easy catalyst adjustment to expose highly suitable surface curvatures with abundant reactive sites. This results in a high selectivity of 92.6% and superior potential window (400 mV, selectivity >88%) for electrochemical reduction of carbon dioxide to formate. Our scalable strategy provides a feasible pathway for mass-producing high-performance and versatile CO2 electrocatalysts.

Keywords

Nanoporous; Dealloying; 3D Architectures; CO2 reduction; formate

Subject

Chemistry and Materials Science, Electrochemistry

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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