电化学
氧化还原
催化作用
电催化剂
生物量(生态学)
醛
碳纤维
化学
化学工程
动力学
材料科学
无机化学
有机化学
电极
物理化学
复合数
海洋学
量子力学
物理
地质学
工程类
复合材料
作者
Ye Wang,Ming Xu,Xi Wang,Ruixiang Ge,Yuquan Zhu,A. Li,Hua Zhou,Fengen Chen,Lirong Zheng,Haohong Duan
标识
DOI:10.1016/j.scib.2023.09.033
摘要
Electrocatalytic oxidation of renewable biomass (such as glucose) into high-value-added chemicals provides an effective approach to achieving carbon neutrality. CuO-derived materials are among the most promising electrocatalysts for biomass electrooxidation, but the identification of their active sites under electrochemical conditions remains elusive. Herein, we report a potential-dependent structure evolution over CuO in the glucose oxidation reaction (GOR). Through systematic electrochemical and spectroscopic characterizations, we unveil that CuO undergoes Cu2+/Cu+ and Cu3+/Cu2+ redox processes at increased potentials with successive generation of Cu(OH)2 and CuOOH as the active phases. In addition, these two structures have distinct activities in the GOR, with Cu(OH)2 being favorable for aldehyde oxidation, and CuOOH showed faster kinetics in carbon-carbon cleavage and alcohol/aldehyde oxidation. This work deepens our understanding of the dynamic reconstruction of Cu-based catalysts under electrochemical conditions and may guide rational material design for biomass valorization.
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