文献类型：期刊文献

英文题名：Co-catalytic application of in situ encapsulation nickel nanoparticles and nickel single atoms on nitrogen-rich carbon frameworks enable efficient and selective CO2 electroreduction

作者：Zheng, Hongbing[1];Lv, Chunmei[1];Xu, Hui[1];Wang, Mingxuan[1];Dai, Bingyuan[1];Yang, Can[1];Zhang, Hao[1];Xiao, Rui[1];Wang, Jitong[1,2];Ling, Licheng[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Key Lab Green Chem Engn & Ind Catalysis, Shanghai 200237, Peoples R China;[2]Guangxi Univ, Sch Chem & Chem Engn, Guangxi Key Lab Petrochem Resource Proc & Proc Int, Nanning 530004, Peoples R China

年份：2026

卷号：704

外文期刊名：JOURNAL OF COLLOID AND INTERFACE SCIENCE

收录：;EI(收录号：20254519472052);WOS:【SCI-EXPANDED(收录号:WOS:001619262600004)】；

基金：This work is financially supported by the National Natural Science Foundation of China (Nos. U21A2060, 22178116 and No. 22308095) , the Natural Science Foundation of Shanghai (No. 22ZR1417400) , the Fundamental Research Funds for the Central Universities (222201817001, 50321041918013, JKA01221601, and JKD01241701) .

语种：英文

外文关键词：CO2RR; Nitrogen-doped carbon nanotubes; Dual active centers; Nickel single atoms

摘要：Carbon dioxide, as one of the major greenhouse gases, has been widely recognized as a key driver of extreme climate changes. Efficiently converting CO2 into valuable resources through reduction reactions stands as a strategic challenge for the future. Graphitic carbon nitride (g-C3N4) holds great promise as a catalyst support for CO2 reduction reactions (CO2RR), but its commercial practical application is hindered by low electrical conductivity and hydrophobicity. This study presents an innovative structural modulation strategy: integrating g-C3N4 with nitrogen-doped carbon nanotubes (N-CNTs) in situ catalytically grown by nickel nanoparticles. This unique interpenetrating architecture creates a hierarchical dual-pathway conductive system, boosting charge transport and hydrophilicity. The catalytic superiority stems from synergistic dual active centers: nickel nano-particles encapsulated in carbon shells (Ni-NPs@C) and nickel single atoms (Ni-SAs) anchored on g-C3N4. Ni-SAs serve as primary CO2 adsorption/activation sites, while Ni-NPs@C accelerate electron transfer. Importantly, the carbon shell encapsulation of Ni-NPs uniquely suppresses the hydrogen evolution reaction. The obtained catalyst achieves a CO Faradaic efficiency of over 98 % with stable performance for 40 h in an H-cell. In MEA reactors, the catalyst demonstrates a CO Faraday efficiency of 85 % at an industrially current density of 780 mA cm-2. In flow cell reactors, the catalyst maintains current densities exceeding 100 mA cm-2 over a wide potential range from-0.6315 V to-1.1315 V (vs. RHE), with CO Faradaic efficiencies consistently above 90 %. This green, one-pot synthesis balances activity, selectivity, and stability, offering a scalable paradigm for next-generation sustainable electrocatalysts.