Uniformly dispersed Bismuth nanoclusters anchored on reduced graphene oxide (rGO)&carbon black for high-efficiency electroreduction CO2 to formate

IF 3.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Molecular Catalysis Pub Date : 2025-03-12 DOI:10.1016/j.mcat.2025.115011

Guanghui Li , Yuxuan Shi , Xiduan Yang , Changye Mang , Jun Luo , Mingjun Rao

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Abstract

In this work, bismuth metal nanoclusters immobilized on reduced graphene oxide (rGO) and carbon black (Bi/rGO&CB) were found to be highly efficient catalysts for the electrochemical reduction of carbon dioxide (CO₂) to formate (HCOO^-). During the CO₂ electroreduction process, Bi/rGO&CB exhibited a Faradaic efficiency (FE) for HCOO^- of 94.16 % at -0.88 V versus the reversible hydrogen electrode (RHE). Additionally, at -1.18 V vs. RHE, the current density for HCOO^- production in the presence of Bi/rGO&CB reached -16.0 mA·cm^-2, which is nearly three times higher than the -6.5 mA·cm^-2 observed with commercial Bi powder. The presence of nanocrystal clusters in Bi/rGO&CB significantly enhances both the catalytic activity and Faraday efficiency of the catalyst. Mechanistic studies revealed that these nanocrystal clusters in Bi/rGO&CB facilitate the Faradaic process and accelerate reaction kinetics compared to Bi/rGO and commercial Bi powder.

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来源期刊

Molecular Catalysis Chemical Engineering-Process Chemistry and Technology

CiteScore

6.90

自引率

10.90%

发文量

700

审稿时长

40 days

期刊介绍： Molecular Catalysis publishes full papers that are original, rigorous, and scholarly contributions examining the molecular and atomic aspects of catalytic activation and reaction mechanisms. The fields covered are: Heterogeneous catalysis including immobilized molecular catalysts Homogeneous catalysis including organocatalysis, organometallic catalysis and biocatalysis Photo- and electrochemistry Theoretical aspects of catalysis analyzed by computational methods