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.
Department of Physics, Tamkang University, Tamsui, 25137, Taiwan.
Angew Chem Int Ed Engl. 2020 Oct 19;59(43):19215-19221. doi: 10.1002/anie.202007767. Epub 2020 Aug 26.
Co-based spinel oxides, which are of mixing valences with the presence of both Co and Co 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 Co in Co O is capable of chemical adsorption for acidic organic molecules, and Co play a decisive role in HMF oxidation. Thereafter, the Cu was introduced in spinel oxides to enhance the exposure degree of Co and to boost acidic adsorption and thus to enhance the electrocatalytic activity for HMF electrooxidation significantly.
基于钴的尖晶石氧化物，由于存在不同原子位置的 Co 和 Co，具有混合价态，被认为是 5-羟甲基糠醛 (HMF) 电化学氧化的有前途的催化剂。确定每个原子位置在 HMF 电氧化中的作用对于设计先进的电催化剂至关重要。在这项工作中，我们发现 CoO 中的 Co 能够对酸性有机分子进行化学吸附，而 Co 在 HMF 氧化中起着决定性的作用。此后，在尖晶石氧化物中引入了 Cu，以提高 Co 的暴露程度，促进酸性吸附，从而显著提高 HMF 电氧化的电催化活性。
