Nickel-copper alloying arrays realizing efficient co-electrosynthesis of adipic acid and hydrogen  

作　　者：Xuhui Ren Qianyu Zhang Yun Tong Guorong Zhou Cong Lin Yanying Zhao Pengzuo Chen 

机构地区：[1]School of Chemistry and Chemical Engineering,Key Laboratory of Surface&Interface Science of Polymer Materials of Zhejiang Province,Zhejiang Sci-Tech University,Hangzhou 310018,Zhejiang,China

出　　处：《Journal of Energy Chemistry》2025年第2期7-15,I0001,共10页能源化学(英文版)

基　　金：financially supported by the National Natural Science Foundation of China(22205205,22472151);the Zhejiang Provincial Natural Science Foundation of China(LQ22B030008);the Science Foundation of Zhejiang Sci-Tech University(ZSTU)under Grant No.21062337-Y.

摘　　要：Constructing electrocatalytic overall reaction technology to couple the electrosynthesis of adipic acid with energy-saving hydrogen production is of significant for sustainable energy systems.However,the development of highly-active bifunctional electrocatalysts remains a challenge.Herein,3D hierarchical nickel-copper alloying arrays with dendritic morphology are manufactured by a simple electrodeposition process,standing for the excellent bifunctional electrocatalyst towards the co-production of adipic acid and H_(2)from cyclohexanone and water.The membrane-free flow electrolyzer of Cu_(0.81)Ni_(0.19)/NF shows the superior electrooxidation performance of ketone-alcohol(KA)oil with high faradaic efficiencies of over 90%for adipic acid and H_(2),robust stability over 200 h as well as a high yield of 0.6 mmol h^(-1) for adipic acid at 100 mA cm^(-2).In-situ spectroscopy indicates the Cu_(0.81)Ni_(0.19)alloy contributes to forming more active NiOOH species to involve in the conversion of cyclohexanone to adipic acid,while the proposed reaction pathway undergoes the 2-hydroxycyclohexanone and 2,7-oxepanedione intermediates.Moreover,the theoretical calculations confirm that the optimal electronic interaction,boosted reaction kinetics as well as improved adsorption free energy of reaction intermediates,synergistically endows Cu_(0.81)Ni_(0.19)alloy with superior bifunctional performance.

关 键 词：Cu_(0.81)Ni_(0.19)alloy Adipic acid Hydrogen fuel Cyclohexanone oxidation reaction Hydrogen evolution reaction 

分 类 号：TQ225.146[化学工程—有机化工] TQ116.2TQ426