SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2022, Vol. 43 ›› Issue (3): 116-123.DOI: 10.1016/j.cjche.2022.02.009

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Layered bismuth oxide/bismuth sulfide supported on carrageenan derived carbon for efficient carbon dioxide electroreduction to formate

Xiangzhao Hu1, Junjie Sun1, Wanzhen Zheng1, Sixing Zheng1, Yu Xie3, Xiang Gao1, Bin Yang1, Zhongjian Li1, Lecheng Lei1, Yang Hou1,2,4   

  1. 1. Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China;
    2. Institute of Zhejiang University-Quzhou, Quzhou 324000, China;
    3. Department of Material Chemistry, Nanchang Hangkong University, Nanchang 330063, China;
    4. School of Biological and Chemical Engineering, Ningbo Technology University, Ningbo 315100, China
  • Received:2021-09-11 Revised:2022-02-13 Online:2022-04-28 Published:2022-03-28
  • Contact: Yu Xie,E-mail:xieyu_121@163.com;Yang Hou,E-mail:yhou@zju.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Nos. 21922811, 21878270, 22178308, and 21961160742), Jiangxi Province "double thousand plan" project (205201000020), the Zhejiang Provincial Natural Science Foundation of China (LR19B060002), the Leading Innovative and Entrepreneur Team Introduction Program of Zhejiang (2019R01006), Zhejiang Key Laboratory of Marine Materials and Protective Technologies (2020K10), Key Laboratory of Marine Materials and Related Technologies, CAS, and the Startup Foundation for Hundred-Talent Program of Zhejiang University.

Layered bismuth oxide/bismuth sulfide supported on carrageenan derived carbon for efficient carbon dioxide electroreduction to formate

Xiangzhao Hu1, Junjie Sun1, Wanzhen Zheng1, Sixing Zheng1, Yu Xie3, Xiang Gao1, Bin Yang1, Zhongjian Li1, Lecheng Lei1, Yang Hou1,2,4   

  1. 1. Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China;
    2. Institute of Zhejiang University-Quzhou, Quzhou 324000, China;
    3. Department of Material Chemistry, Nanchang Hangkong University, Nanchang 330063, China;
    4. School of Biological and Chemical Engineering, Ningbo Technology University, Ningbo 315100, China
  • 通讯作者: Yu Xie,E-mail:xieyu_121@163.com;Yang Hou,E-mail:yhou@zju.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (Nos. 21922811, 21878270, 22178308, and 21961160742), Jiangxi Province "double thousand plan" project (205201000020), the Zhejiang Provincial Natural Science Foundation of China (LR19B060002), the Leading Innovative and Entrepreneur Team Introduction Program of Zhejiang (2019R01006), Zhejiang Key Laboratory of Marine Materials and Protective Technologies (2020K10), Key Laboratory of Marine Materials and Related Technologies, CAS, and the Startup Foundation for Hundred-Talent Program of Zhejiang University.

Abstract: Electrochemical reduction of carbon dioxide (CO2ER) into formate plays a crucial role in CO2 conversion and utilization. However, it still faces the problems of high overpotential and poor catalytic stability. Herein, we report a hybrid CO2ER electrocatalyst composed of layered bismuth sulfide (Bi2S3) and bismuth oxide (Bi2O3) supported on carrageenan derived carbon (Bi-CDC) prepared by a combined pyrolysis with hydrothermal treatment. In such 3D hybrid, layered Bi2O3 and Bi2S3 are uniformly grown on nanocarbon supports. Benefiting from strong synergistic effect between Bi2O3/Bi2S3 and nanocarbon, Bi-CDC-1:2 displays a high Faradic efficiency (FE) of >80% for formate production in the range of -0.9 V to -1.1 V with the maximum formate FE of 85.6% and current density of 14.1 mA·cm-2 at -1.0 V. Further, a positive onset potential of -0.5 V, a low Tafel slope of 112.38 mV·dec-1, and a slight performance loss during long-term CO2ER tests are observed on Bi-CDC-1:2. Experimental results shows that the better CO2ER performance of Bi-CDC-1:2 than that of Bi2O3 can be attributed to the strong interfacial interactions between nanocarbons and Bi2O3/Bi2S3. In situ ATR-FTIR measurements reveal that the rate-determining step in the CO2ER is the formation of HCOO* intermediated. Compared with carbon support, Bi-CDC-1:2 can promote the production of HCOO* intermediate and thus promoting CO2ER kinetic.

Key words: Nanomaterials, Catalyst, Selectivity, Bi2S3/Bi2O3, CO2 electroreduction, Formate

摘要: Electrochemical reduction of carbon dioxide (CO2ER) into formate plays a crucial role in CO2 conversion and utilization. However, it still faces the problems of high overpotential and poor catalytic stability. Herein, we report a hybrid CO2ER electrocatalyst composed of layered bismuth sulfide (Bi2S3) and bismuth oxide (Bi2O3) supported on carrageenan derived carbon (Bi-CDC) prepared by a combined pyrolysis with hydrothermal treatment. In such 3D hybrid, layered Bi2O3 and Bi2S3 are uniformly grown on nanocarbon supports. Benefiting from strong synergistic effect between Bi2O3/Bi2S3 and nanocarbon, Bi-CDC-1:2 displays a high Faradic efficiency (FE) of >80% for formate production in the range of -0.9 V to -1.1 V with the maximum formate FE of 85.6% and current density of 14.1 mA·cm-2 at -1.0 V. Further, a positive onset potential of -0.5 V, a low Tafel slope of 112.38 mV·dec-1, and a slight performance loss during long-term CO2ER tests are observed on Bi-CDC-1:2. Experimental results shows that the better CO2ER performance of Bi-CDC-1:2 than that of Bi2O3 can be attributed to the strong interfacial interactions between nanocarbons and Bi2O3/Bi2S3. In situ ATR-FTIR measurements reveal that the rate-determining step in the CO2ER is the formation of HCOO* intermediated. Compared with carbon support, Bi-CDC-1:2 can promote the production of HCOO* intermediate and thus promoting CO2ER kinetic.

关键词: Nanomaterials, Catalyst, Selectivity, Bi2S3/Bi2O3, CO2 electroreduction, Formate