期刊
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
卷 61, 期 34, 页码 12383-12391出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.2c01257
关键词
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资金
- National Natural Science Foundation of China [21636010, 21878342, 22178393]
- Foundation of State Key Laboratory of Coal Conversion, Shanxi, China [J21-22-609]
- Hunan Provincial Science and Technology Plan Project, China [2019TP1001, 2020JJ3044]
- Fundamental Research Funds for Central Universities of Central South University [2021zzts0552]
- Guangdong Basic and Applied Basic Research Foundation [2021A1515110789]
The electrocatalytic reduction of CO2 to valuable chemicals and fuels has great potential. In this study, a method for preparing two-dimensional Bi-based catalysts was developed by reconstituting Bi-0 atoms. Raman spectral analysis revealed that the reconstituted Bi-0 atoms were the active centers for electrocatalysis. The prepared catalyst showed excellent electrocatalytic activity and long-term stability.
The electrocatalytic reduction of CO2 shows significant potential for the conversion of CO2 to valuable chemicals and fuels. Herein, we develop a method for the preparation of two-dimensional Bi-based catalysts by the reconstitution of a Bi-0 atom (re-Bi NSs). In situ Raman spectral analysis reveals that the reconstituted fresh Bi-0 is the electrocatalytic active center, while Bi-III is not. The as-prepared electrocatalyst exhibits excellent electrocatalytic activity for the generation of formate with a high faradaic efficiency (FEformate) of over 90% at an applied potential from -0.8 to -1.2 V versus reversible hydrogen electrode (RHE), with the corresponding j(formate) ranging from -13.76 to -44.89 mA cm(-2). Moreover, the maximum FE(formate )reaches 94.6% at -1.0 V versus RHE with j(formate) of -32.2 mA cm(-2). The catalyst also shows good long-term stability. The re-Bi NSs in a flow cell achieved a FEformate of 94.6% with a high current density of -400.0 mA cm(-2). Our new strategy for the preparation of a catalyst with a reconstituted Bi-0 atom will provide a novel tool for the design of highly active and stable Bi-based electrocatalysts.
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