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

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

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 Co3O4 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.

SPINEL; OXIDES; SPINEL group; ELECTROCATALYSTS; BIOMASS conversion

Angewandte Chemie, 2020, Vol 132, Issue 43, p19377

0044-8249

Academic Journal

10.1002/ange.202007767