Wang Xinlin, Xiao Chuqian, Xie Yuanming, Yang Chunqi, Li Yuhang, Zhang Ying, Murayama Toru, Ishida Tamao, Lin Mingyue, Xiu Guangli
State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, Shanghai Environmental Protection Key Laboratory on Environmental Standard and Risk Management of Chemical Pollutants, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, P.R. China.
Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, P.R. China.
ACS Appl Mater Interfaces. 2024 Aug 28;16(34):44938-44946. doi: 10.1021/acsami.4c09776. Epub 2024 Aug 15.
Facilitating the selective electrochemical oxidation of methanol into value-added formate is essential for electrochemical refining. Here we propose a high-dimensional NbO on Ni foam (NbO-HD@NF) composite as anode for methanol oxidation reaction (MOR) for efficient production of formate. In an electrolyte containing 3 M methanol aqueous solution, the NbO-HD@NF anode requires only 240 mV overpotential to deliver an industrial-level current density of 100 mA cm with a formate Faraday efficiency of 100%. Raman and electrochemical kinetic analyses reveal that the origin of the excellent activity in 3 M methanol electrolyte can be ascribed to the NbO octahedra as active sites and the Lewis acid sites on the surface of NbO-HD. This work may pave a way for the design of non-noble metal electrocatalysts with surface acidity engineering for the effective electrocatalytic upgrading of biomass molecules.
促进甲醇选择性电化学氧化为高附加值的甲酸盐对于电化学精炼至关重要。在此，我们提出一种泡沫镍负载的高维氧化铌（NbO-HD@NF）复合材料作为甲醇氧化反应（MOR）的阳极，用于高效生产甲酸盐。在含有3 M甲醇水溶液的电解质中，NbO-HD@NF阳极仅需240 mV的过电位即可提供100 mA cm的工业级电流密度，甲酸盐法拉第效率为100%。拉曼光谱和电化学动力学分析表明，在3 M甲醇电解质中优异活性的来源可归因于作为活性位点的NbO八面体以及NbO-HD表面的路易斯酸位点。这项工作可能为通过表面酸度工程设计用于生物质分子有效电催化升级的非贵金属电催化剂铺平道路。
