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Oxygen Vacancy Boosts the V~2~O~5~ Performance for the Electrochemical H~2~O~2~ Product by Shijie Zhang; Ge Feng; Zhikang Bao; Xiaoge Peng; Chenghang Jiang; Yizhen Shao; Shibin Wang; Jianguo Wang is a Engineering article available to read on EtoBox.

What is Oxygen Vacancy Boosts the V~2~O~5~ Performance for the Electrochemical H~2~O~2~ Product about?

On-site electrochemical hydrogen peroxide (H 2 O 2 ) generation via the two-electron oxygen reduction reaction (2e − ORR), as a cost-effective alternative to the anthraquinone process, relies on the exploitation of excellent activity and the stability catalyst. In this study, we reveal that by modulating the oxygen vacancy (Ov) on V 2 O 5 with the H 2 treatment, high activity and a selective oxygen reduction for H 2 O 2 production can be obtained with the basic electrolyte, showing a 92.32% selectivity within a wide range of potential. Combined spectroscopic results demonstrate that the enhanced performance of the 2e − ORR originates from the introduction of the Ov, which adjusts the electron structure of V 2 O 5 . The DFT analysis reveals that the Ov improves the adsorption of the oxygen on V 2 O 5 and optimizes the oxygen reaction path superior to H 2 O 2 . Moreover, the V 2 O 5 -300 catalyst presented an excellent performance in the electrodegradation of antibiotics, indicating the application potential for environmental protection. This work provides an insight into the design of the metal oxides for effective H 2 O 2 generation.

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Author

Shijie Zhang; Ge Feng; Zhikang Bao; Xiaoge Peng; Chenghang Jiang; Yizhen Shao; Shibin Wang; Jianguo Wang

Publisher

American Chemical Society (ACS)

Published

2023

Language

EN

Field

Engineering (Physical Sciences)