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Novel electrocatalyst with abundant oxygen vacancies enabling efficient two-electron water oxidation reaction for H2O2 synthesis
富氧空缺的新型電催化劑實現高效雙電子水氧化反應合成過氧化氫


C. Barasa Guta, H. Gemechu Edao, W. Bafe Dilebo, C.Y. Chang, F. Temesgen Angerasa, E.A. Moges, Y. Nikodimos, K. Lakshmanan, M.C. Tsai*, W.N. Su*, B. J. Hwang*
https://doi.org/10.1016/j.cej.2024.156418
SEED Member: M.C. Tsai, W.N. Su, B. J. Hwang

 
 

Major Contributions

1. Development of a novel magnesium stannite tungstate (Mg1-xSnWO6-x) electrocatalyst through hydrothermal and calcination methods, achieving remarkable performance with a low overpotential of 70 mV at 10 mA cm-2 and high Faradaic efficiency of 84% for H2O2 production.

2. Engineering of abundant oxygen vacancies in the catalyst structure through controlled temperature treatment at 700°C, which significantly enhanced the two-electron water oxidation reaction selectivity and stability over 35 hours of operation.

3. Demonstration of superior H2O2 generation performance with a high current density of 360 mA cm-2 and H2O2 production rate of 68.368 μmol cm-2 min-1, establishing a new benchmark for electrochemical H2O2 synthesis.


主要貢獻

1. 通過水熱法和煅燒方法開發出新型鎂錫鎢酸鹽(Mg1-xSnWO6-x)電催化劑,在10 mA cm-2電流密度下實現低過電位70 mV,且過氧化氫生成的法拉第效率高達84%。

2. 通過700°C的溫度控制處理,在催化劑結構中形成豐富的氧空缺,顯著提升了雙電子水氧化反應的選擇性,並維持35小時以上的穩定運行。

3. 展現出優異的過氧化氫產生性能,達到360 mA cm-2的高電流密度和68.368 μmol cm-2 min-1的過氧化氫生成速率,為電化學合成過氧化氫設立新標竿。