Facile preparation of functionalized and oxygen-deficient V2O5 nanosheets electrode as a versatile platform for biomimetic- and photoelectro-catalysis

Ting Rong Ko, Chia Yu Lin, Yi Hsuan Lai

研究成果: Article同行評審

11 引文 斯高帕斯(Scopus)

摘要

In this study, we present a facile and scalable preparation of formamide-functionalized and oxygen-deficient V2O5 nanosheets (thickness: 30 ∼ 40 nm) modified electrode (FTO|exf-V2O5) with promising peroxidase-like and photoelectrocatalytic activity. FTO|exf-V2O5 was prepared by the direct top-down exfoliation of the V2O5 sub-micron plates (thickness: 300 ∼ 550 nm) modified electrode (FTO|micro-V2O5) in the presence of formamide as the exfoliation agent at mild conditions. Formamide molecules were found to adsorb on FTO|exf-V2O5 and serve as the active sites for the reduction of noble metal, which not only enables the application of FTO|exf-V2O5 for the recovery of noble metals but also allows further functionalization and electrocatalytic oxidation of H2O2. As compared with FTO|micro-V2O5, FTO|exf-V2O5 had significantly higher oxygen vacancy (VO) content and exhibited remarkably enhanced peroxidase activity with an ultra-low Michaelis-Menten constant of 68.24 μM and a high catalytic constant (or maximal turnover frequency) of 0.28 s−1. Finally, FTO|exf-V2O5 with lower dimension and higher VO content showed improved kinetics of charge-transport and interfacial charge-transfer, resulting in the enhanced activity towards photoelectrocatalytic oxidation of water and methanol. This work opens a new avenue for the preparation of exfoliated 2-D material based platform for biomimetic catalysis and energy conversion.

原文English
文章編號133607
期刊Chemical Engineering Journal
433
DOIs
出版狀態Published - 2022 4月 1

All Science Journal Classification (ASJC) codes

  • 一般化學
  • 環境化學
  • 一般化學工程
  • 工業與製造工程

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