4.7 Article

Co3O4 Nanowires Decorated with BOx Species for Electrocatalytic Oxygen Evolution

期刊

ACS APPLIED NANO MATERIALS
卷 5, 期 12, 页码 18998-19005

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acsanm.2c04794

关键词

electrochemical OER; decorated; NaBH4; oxygen vacancy

资金

  1. National Natural Science Foundation of China [51872068]
  2. Graduate Innovation Project of Harbin Normal University [HSDBSCX2021-12, HSDSSCX2022-51]
  3. Postgraduate Education and Teaching Reform Project
  4. Joint Guidance Project of the Natural Science Foundation of Heilongjiang Province, China [LH2022E093]
  5. Heilongjiang Province College students innovation and entrepreneurship training program [S202210231110, S202210231090]

向作者/读者索取更多资源

The study successfully enhanced the performance of one-dimensional nanowires in oxygen evolution reaction by introducing oxygen vacancies and boron elements. The Co3O4/BOx nanowire array electrode showed higher current density and lower overpotential compared to spinel Co3O4.
One-dimensional nanowires possess significant advantages in active site exposure and electron and matter transport. Their oxygen evolution reaction (OER) performances can be well enhanced by the introduction of oxygen vacancies (Ov) and boron element (B), which, however, have not been achieved simultaneously. Herein, the Ov and BOx motifs were simulta-neously employed in typical cobalt spinel oxide nanowires via simple NaBH4 hydrolysis (Co3O4/BOx). When grown on carbon fiber cloth, the observed Co3O4/BOx nanowire array electrode drives a current density of 10 mA cm-2 with only 328 mV overpotential in a 1.0 M KOH solution, which is much superior to the spinel Co3O4. We found that the BOx motifs and Ov have efficiently tuned electronic structures of Co3O4 , thereby enhancing the electrical conductivity and generating a large number of electroactive sites. This study provides a simple solution for designing and producing nanostructure OER catalysts with excellent electrochemical performance.

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