首页|Single-Ni-atoms on nitrogenated humic acid based porous carbon for CO2 electroreduction

Single-Ni-atoms on nitrogenated humic acid based porous carbon for CO2 electroreduction

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We proposed a facile synthesis of single-Ni-atom catalysts on low-cost porous carbon using a calcina-tion method at the temperatures of 850-1000 ℃,which were used for CO2 electrochemical reduction to CO.The porous carbon was prepared by carbonizing cheap and abundant humic acid.The structural characterizations of the as-synthesized catalysts and their electrocatalytic performances were analyzed.The results showed that the single-Ni-atom catalyst activated at 950 ℃ showed an optimum catalytic performance,and it reached a CO Faradaic efficiency of 91.9％with a CO partial current density of 6.9 mA·cm-2 at-0.9 V vs.reversible hydrogen electrode(RHE).Additionally,the CO Faradaic efficiency and current density of the optimum catalyst changed slightly after 8 h of continuous operation,suggesting that it possessed an excellent stability.The structure-activity relations indicate that the variation in the CO2 electroche-mical reduction performance for the as-synthesized cataly-sts is ascribed to the combined effects of the increase in the content of pyrrolic N,the evaporation of Ni and N,the decrease in pore volume,and the change in graphitization degree.

CO2 electroreductionsingle-Ni-atom cataly-stshumic acid based porous carbon

Delei Yu、Ying Chen、Yao Chen、Xiangchun Liu、Xianwen Wei、Ping Cui

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Anhui Key Laboratory of Coal Clean Conversion & Utilization,School of Chemistry and Chemical Engineering,Anhui University of Technology,Ma'anshan 243002,China

国家自然科学基金国家自然科学基金Anhui Province Major Industrial Innovation PlanUniversity Synergy Innovation Program of Anhui Province安徽省教育厅自然科学研究项目Youth Natural Science Foundation of Anhui University of TechnologyUndergraduate Innovation and Entrepreneurship Training Program of Anhui Province

2230800622278001AHZDCYCX-LSDT2023-04GXXT-2022-006KJ2021A0407QZ202216S202310360214

2024

10.1007/s11705-024-2411-7

化学科学与工程前沿
高等教育出版社

化学科学与工程前沿

CSTPCDEI
影响因子：0.172
ISSN：2095-0179
年,卷(期)：2024.18(5)
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