Identifying the Geometric Site Dependence of Spinel Oxides for the Electrooxidation of 5-Hydroxymethylfurfural

Yuxuan Lu; Chung-Li Dong; Yu-Cheng Huang; Yuqin Zou; Zhijuan Liu; Yanbo Liu; Yingying Li; Nihan He; Jianqiao Shi; Shuangyin Wang

doi:10.1002/anie.202007767

Identifying the Geometric Site Dependence of Spinel Oxides for the Electrooxidation of 5-Hydroxymethylfurfural

Angew Chem Int Ed Engl. 2020 Oct 19;59(43):19215-19221. doi: 10.1002/anie.202007767. Epub 2020 Aug 26.

Authors

Affiliations

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, Institution Hunan University, Changsha, 410082, P. R. China.
² Department of Physics, Tamkang University, Tamsui, 25137, Taiwan.

PMID: 32705755
DOI: 10.1002/anie.202007767

Abstract

Co-based spinel oxides, which are of mixing valences with the presence of both Co²⁺ and Co³⁺ at different atom locations, are considered as promising catalysts for the electrochemical oxidation of 5-hydroxymethylfurfural (HMF). Identifying the role of each atom site in the electroxidation of HMF is critical to design the advanced electrocatalysts. In this work, we found that Co²⁺_Td in Co₃ O₄ is capable of chemical adsorption for acidic organic molecules, and Co³⁺_Oh play a decisive role in HMF oxidation. Thereafter, the Cu²⁺ was introduced in spinel oxides to enhance the exposure degree of Co³⁺ and to boost acidic adsorption and thus to enhance the electrocatalytic activity for HMF electrooxidation significantly.

Keywords: electrochemical biomass conversion; geometry effects; lattice modifications; metal-oxygen covalency; spinel oxides.

Publication types

Research Support, Non-U.S. Gov't