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Stabilization of Cu/Ni Alloy Nanoparticles with Graphdiyne Enabling Efficient CO2 Reduction
Authors:FU Xinliang  ZHU Aonan  CHEN Xiaojie  ZHANG Shifu  WANG Mei  YUAN Mingjian
Affiliation:1. Key Laboratory of Advanced Energy Materials Chemistry, Ministry of Education, Renewable Energy Conversion and Storage Center(RECAST), College of Chemistry, Nankai University, Tianjin 300071, P. R. China;2. Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, P. R. China
Abstract:Electrocatalysis has become an attractive strategy for the artificial reduction of CO2 to high-value chemicals.However,the design and development of highly selective and stable non-noble metal electrocatalysts that convert CO2 to CO are still a challenge.As a new type of two-dimensional carbon material,graphdiyne(GDY),is rarely used to explore the application in carbon dioxide reduction reaction(CO2RR).Therefore,we tried to use GDY as a substrate to stabilize the copper-nickel alloy nanoparticles(NPs)to synthesize Cu/Ni@GDY.Cu/Ni@GDY requires an overpotential(-0.61 V)to 10 mA/cm2 for the formation of CO,and it shows better activity than Au and Ag,achieving a higher Faraday efficiency of about 95.2%and high stability of about 26 h at an overpotential(-0.70 V).The electronic interaction between GDY substrate and Cu/Ni alloy NPs and the large specific surface area of GDY is responsible for the high performance.
Keywords:Graphdiyne(GDY)  Carbon dioxide reduction reaction(CO2RR)  CO  Electrocatalysis  Cu/Ni alloy nanoparticle
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