4.8 Review

Engineering Nonprecious Metal Oxides Electrocatalysts for Two-Electron Water Oxidation to H2O2

期刊

ADVANCED ENERGY MATERIALS
卷 12, 期 32, 页码 -

出版社

WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.202201466

关键词

hydrogen peroxide; metal oxides; nanostructure engineering; water oxidation

资金

  1. National Key Research and Development Program of China [2021YFA1600800]
  2. Huazhong University of Science and Technology (HUST)
  3. Innovation and Talent Recruitment Base of New Energy Chemistry and Device [B21003]
  4. Open Research Fund of Key Laboratory of Material Chemistry for Energy Conversion and Storage (HUST), Ministry of Education [2021JYBKF03]
  5. Open Fund of Hubei Key Laboratory of Material Chemistry and Service Failure, Huazhong University of Science and Technology [2020MCF03]
  6. Open Research Fund of Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, Huaibei Normal University [2020KF05]
  7. Hainan Provincial Joint Project of Sanya Yazhou Bay Science and Technology City [520LH054]
  8. Fundamental Research Funds for the Central Universities [WUT: 2021IVA66]
  9. National Natural Science Foundation of China [22075092]
  10. Wuhan University of Technology Startup Fund [40120562]
  11. Program for HUST Academic Frontier Youth Team

向作者/读者索取更多资源

This article reviews the recent progress on nanostructure engineering of various nonprecious metal oxides electrocatalysts for 2e-WOR, discusses the fundamental understanding of 2e-WOR, H2O2 quantification methods, and strategies for high-performance electrocatalysts. The future challenges and opportunities for 2e-WOR to H2O2 are proposed.
Hydrogen peroxide (H2O2) is a valuable chemical oxidant which has been extensively applied in water treatment, textile/paper bleaching, medical disinfection, and other industrial fields. Electrocatalytic two-electron water oxidation reaction (2e-WOR) with renewable energy inputs is an attractive route to produce H2O2, which avoids the energy-intensive anthraquinone process in industry. However, leveraging these advances requires the development of efficient and selective electrocatalysts to accelerate the sluggish kinetics. In particular, nanostructured engineering of nonprecious metal oxides offers a promising route for 2e-WOR. In this review, the recent progress on nanostructure engineering of various nonprecious metal oxides electrocatalysts for 2e-WOR is reviewed, along with remarks on the challenges and perspectives. The fundamental understanding of 2e-WOR by density functional theory calculations and operando characterizations is first given, followed by a discussion of diverse H2O2 quantification methods including ultraviolet-visible spectrophotometry, titration, and colorimetric strips, with special emphasis on their accuracy, detection limit and stability. Afterward, various strategies toward high-performance nonprecious metal oxides electrocatalysts including doping, defect, facet, and interface engineering are overviewed. Future challenges and opportunities for 2e-WOR to H2O2 are proposed finally.

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