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Hierarchically nanostructured Ni O-Co3O4 with rich interface defects for the electro-oxidation of 5-hydroxymethylfurfural

查看全文 作　　者：Yuxuan [1]Lu;Chung-Li [2]Dong;Yu-Cheng [2]Huang;Yuqin [1]Zou;Yanbo [1]Liu;Yingying [1]Li;Nana [1]Zhang;Wei [1]Chen;Ling [1]Zhou;Hongzhen [3]Lin;Shuangyin [1]Wang 高影响力作者 机构地区：[1]State Key Laboratory of Chem/Bio-Sensing and Chemometrics,Provincial Hunan Key Laboratory for Graphene Materials and Devices,College of Chemistry and Chemical Engineering,the National Supercomputer Centers in Changsha,Hunan University,Changsha 410082;[2]Department of Physics,Tamkang University,Taipei 25137;[3]i-LAB,Suzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences,Suzhou 215123高影响力机构 出　　处：《Science China Chemistry》索引2020年第63卷第7期,共7页高影响力期刊 基　　金：supported by the Fundamental Research Funds for the Central Universities (531118010127);the National Natural Science Foundation of China (21902047, 51402100, 21825201, 21573066, 21805080, 21972164, U19A2017);the Provincial Natural Science Foundation of Hunan (2016TP1009)。 摘　　要：Ni-based electrocatalysts with strong redox abilities are active for the electrochemical oxidation of 5-hydroxymethylfurfural(HMF). Interface engineering is an efficient way to modulate the electronic structure, tune the intermediate adsorption, and expose more active sites. Herein, we increased the concentration of interfacial sites with rich defects in a 3D hierarchical nanostructured NiO-Co3O4 electrocatalyst and investigated its catalytic performance for HMF electro-oxidation. The interface effect created abundant cation vacancies, modulated the electronic properties of Co and Ni atoms, and raised the oxidation state of Ni species. The NiO-Co3O4 catalysts show superb HMF oxidation activities with a low onset potential of 1.28 VRHE.Meanwhile, in-situ surface-selective vibrational spectroscopy of sum-frequency generation was performed to study the reaction pathway during the oxidation process on the electrocatalysts. The current study offers an efficient way to create cation vacancies and proves the decisive role of cation vacancies in catalyzing the HMF electro-oxidation. 关 键 词：interface effect cation vacancies in-situ vibrational spectroscopy electrochemical biomass conversion 3D hierarchical nanostructure
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