Optimizing CO production in electrocatalytic CO_(2) reduction via electron accumulation at Ni sites in Ni_(3)ZnC_(0.7)/Ni on N-doped carbon nanofibersOA
The electrocatalytic reduction of carbon dioxide(CO_(2)RR)to valuable products presents a promising solution for addressing global warming and enhancing renewable energy storage.Herein,we construct a novel Ni_(3)ZnC_(0.7)/Ni heterostructure electrocatalyst,using an electrospinning strategy to prepare metal particles uniformly loaded on nitrogen-doped carbon nanofibers(CNFs).The incorporation of zinc(Zn)into nickel(Ni)catalysts optimizes the adsorption of CO_(2)intermediates,balancing the strong binding affinity of Ni with the comparatively weaker affinity of Zn,which mitigates over-activation.The electron transfer within the Ni_(3)ZnC_(0.7)/Ni@CNFs system facilitates rapid electron transfer to CO_(2),resulting in great performance with a faradaic efficiency for CO(FECO)of nearly 90%at−0.86 V versus the reversible hydrogen electrode(RHE)and a current density of 17.51 mA cm^(−2)at−1.16 V versus RHE in an H-cell.Furthermore,the catalyst exhibits remarkable stability,maintaining its crystal structure and morphology after 50 h of electrolysis.Moreover,the Ni_(3)ZnC_(0.7)/Ni@CNFs is used in the membrane electrode assembly reactor(MEA),which can achieve a FECO of 91.7%at a cell voltage of−3 V and a current density of 200 mA cm−2 at−3.9 V,demonstrating its potential for practical applications in CO_(2)reduction.
Min Wang;Ge Bai;Luwei Peng;Lulu Li;Yadan Yu;Wenyi Li;Nianjun Yang;Daniil I.Kolokolove;Jinli Qiao
State Key Laboratory of Advanced Fiber Materials,College of Environmental Science and Engineering,Donghua University,Shanghai,201620,ChinaShanghai Institute of Pollution Control and Ecological Security,Shanghai,200092,China School of Chemistry and Chemical Engineering,Yancheng Institute of Technology,Yancheng,224051,ChinaDepartment of Applied Physics,Hong Kong Polytechnic University,11 YucaiRoad,Kowloon,Hongkong,ChinaState Key Laboratory of Advanced Fiber Materials,College of Environmental Science and Engineering,Donghua University,Shanghai,201620,ChinaState Key Laboratory of Advanced Fiber Materials,College of Environmental Science and Engineering,Donghua University,Shanghai,201620,ChinaState Key Laboratory of Advanced Fiber Materials,College of Environmental Science and Engineering,Donghua University,Shanghai,201620,ChinaDepartment of Chemistry&IMO-IMOMEC,Hasselt University,3590,Diepenbeek,BelgiumBoreskov Institute of Catalysis,Siberian Branch of Russian Academy of Sciences,Prospekt Akademika Lavrentieva 5,Novosibirsk,630090,RussiaState Key Laboratory of Advanced Fiber Materials,College of Environmental Science and Engineering,Donghua University,Shanghai,201620,China Shanghai Institute of Pollution Control and Ecological Security,Shanghai,200092,China School of Chemistry and Chemical Engineering,Yancheng Institute of Technology,Yancheng,224051,China
资源环境
CO_(2)electroreductionCO productionNi_(3)ZnC_(0.7)/NiHeterostructureMembrane electrode assembly
《Green Energy & Environment》 2026 (1)
P.258-268,11
financial support from the Natural Science Foundation of Yancheng(YCBK2024004)the Basic Research Program of Jiangsu(BK20251089)the“Scientific and Technical Innovation Action Plan”Basic Research Field of Shanghai Science and Technology Committee(19JC1410500).
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