文献类型：期刊文献

英文题名：Engineering highly-exposed nickel nanoparticles within a nitrogen-doped carbon matrix for efficient CO2 electroreduction to CO

作者：Yang, Can[1];Dai, Bingyuan[1];Wang, Minxuan[1];Xu, Hui[1];Zheng, Hongbing[1];Ma, Cheng[2];Ling, Licheng[3];Wang, Jitong[1,4]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Green Chem Engn & Ind Catalysis, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Specially Funct Polymer Mat & Related Tech, Minist Educ, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Sch Chem Engn, Key Lab Specially Funct Polymer Mat & Related Tech, Minist Educ, Shanghai 200237, Peoples R China;[4]Guangxi Univ, Univ Engn Res Ctr Green Chem New Mat, Sch Chem & Chem Engn, Nanning 530004, Peoples R China

年份：2026

卷号：20

期号：7

外文期刊名：ENGINEERING CHEMICAL ENGINEERING

收录：;EI(收录号：20261620549893);WOS:【SCI-EXPANDED(收录号:WOS:001739729900001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (Grant Nos. U21A2060 and 22178116) and the Fundamental Research Funds for the Central Universities (Grant No. JKD01251701).

语种：英文

外文关键词：Ni nanoparticles; carbon shell; CO2RR; graphite carbon

摘要：Ni single-atom catalysts have been widely explored for CO2 reduction, however, their practical application is often hampered by complex synthesis and instability at high current densities. In this context, well-dispersed nickel nanoparticles present a compelling alternative, offering both facile fabrication and robust performance. Herein, a hierarchical catalyst comprising nickel nanoparticles encapsulated within a nitrogen-doped carbon shell on a hollow-rod carbon substrate (denoted as Ni-NP-BCN@C) was designed. The hollow-rod architecture maximizes the exposure of nickel nanoparticles as active sites, while the nitrogen-doped carbon shell effectively modulates the electronic environment of the metallic Ni, suppressing the competing hydrogen evolution reaction and promoting CO2 activation. The catalyst exhibits exceptional CO2-to-CO conversion, with a Faradaic efficiency exceeding 90% at -0.83 V vs. RHE in an H-cell and remarkable stability over 32 h. When evaluated in a flow-cell configuration, it achieves a CO Faradaic efficiency > 98% at a current density of 300 mA & centerdot;cm(-2), corresponding to a high turnover frequency of similar to 93,579 h(-1). In situ Fourier transform infrared spectroscopy revealed intensified bands for key intermediates (*COOH and COO-), confirming enhanced CO2 adsorption and activation. This work showcases a scalable and efficient catalyst design, highlighting the synergy between structural engineering and electronic modulation for advanced CO2 electroreduction.