Citation: Ke WANG, Yong-Yu PANG, Huan XIE, Yuan SUN, Guo-Liang CHAI. Synergistic Effect of Ta₂O₅/F−C Composites for Effective Electrosynthesis of Hydrogen Peroxide from O₂ Reduction[J]. Chinese Journal of Structural Chemistry, ;2021, 40(2): 225-232. doi: 10.14102/j.cnki.0254-5861.2011-2817 shu

Synergistic Effect of Ta₂O₅/F−C Composites for Effective Electrosynthesis of Hydrogen Peroxide from O₂ Reduction

Ke WANG ^{a, b} ,
Yong-Yu PANG ^b ,
Huan XIE ^b ,
Yuan SUN ^b ,
Guo-Liang CHAI ^b,,

a.
College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China
b.
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China

Corresponding author: Guo-Liang CHAI, g.chai@fjirsm.ac.cn
Received Date: 23 March 2020
Accepted Date: 20 April 2020

Fund Project: the National Natural Science Foundation of China 21703248the Strategic Priority Research Program of the Chinese Academy of Sciences XDB20000000

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The electrosynthesis of H₂O₂ as an environmentally friendly green process has attracted great attention due to the importance of H₂O₂ in industry and human lives. In this work, a new strategy was proposed to improve the electrical conductivity and H₂O₂ selectivity of transition metal oxides catalysts. F−C (F doped carbon) was coupled with Ta₂O₅ by calcining polyvinylidene fluoride (PVDF) as the carbon source using one step method. The Ta₂O₅/F−C composite catalysts show an excellent H₂O₂ selectivity of more than 80% as well as high reactivity at 2.52 mA/cm², which is greatly enhanced compared to the counterparts of F−C (selectivity of 59%) and Ta₂O₅-800 (current density of 0.85 mA/cm²) in 0.1 M KOH solution. The onset potential for H₂O₂ production on Ta₂O₅/F−C composites is 0.78 V in 0.1 M KOH, which indicates a negligible overpotential. In addition, H₂O₂ selectivity of the catalyst can be stabilized at more than 80% after 10 hours of electrolysis in alkaline electrolyte. The high performance due to the introduction of F−C increases the conductivity of Ta₂O₅ and the synergistic effect between F−C and Ta₂O₅. This work proposed an efficient synergistic effect among F-doped C and Ta₂O₅ for H₂O₂ production.
- Ta₂O₅/F−C,
- oxygen reduction reaction,
- hydrogen peroxide
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Synergistic Effect of Ta₂O₅/F−C Composites for Effective Electrosynthesis of Hydrogen Peroxide from O₂ Reduction