能源化学(英文) ›› 2017, Vol. 26 ›› Issue (6): 1210-1216.DOI: 10.1016/j.jechem.2017.08.014

• Articles • 上一篇    下一篇

PVP-assisted synthesis of porous CoO prisms with enhanced electrocatalytic oxygen evolution properties

Xueli Zhaoa, Wei Zhanga, Rui Caoa,b   

  1. a School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, Shaanxi, China;
    b Department of Chemistry, Renmin University of China, Beijing 100872, China
  • 收稿日期:2017-07-18 修回日期:2017-08-29 发布日期:2017-11-24
  • 通讯作者: Wei Zhang,E-mail addresses:zw@snnu.edu.cn;Rui Cao,E-mail addresses:ruicao@ruc.edu.cn
  • 基金资助:

    We are grateful for the support from the Fundamental Research Funds for the Central Universities, the Starting Research Funds of Shaanxi Normal University, the National Natural Science Foundation of China (21101170, 21503126 and 21573139) and the "Thousand Talents Program" of China.

PVP-assisted synthesis of porous CoO prisms with enhanced electrocatalytic oxygen evolution properties

Xueli Zhaoa, Wei Zhanga, Rui Caoa,b   

  1. a School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, Shaanxi, China;
    b Department of Chemistry, Renmin University of China, Beijing 100872, China
  • Received:2017-07-18 Revised:2017-08-29 Published:2017-11-24
  • Contact: Wei Zhang,E-mail addresses:zw@snnu.edu.cn;Rui Cao,E-mail addresses:ruicao@ruc.edu.cn
  • Supported by:

    We are grateful for the support from the Fundamental Research Funds for the Central Universities, the Starting Research Funds of Shaanxi Normal University, the National Natural Science Foundation of China (21101170, 21503126 and 21573139) and the "Thousand Talents Program" of China.

摘要: Hollow metal oxide materials with nanometer-to-micrometer dimensions have attracted tremendous attention because of their potential applications in energy conversion and storage systems. Numerous efforts have been focused on developing versatile methods for the rational synthesis of various hollow structures to act as efficient water oxidation catalysts. In this work, a unique porous and hollow CoO tetragonal prism-like structure has been successfully synthesized via a facile and efficient co-precipitation method with polyvinylpyrrolidone (PVP K30) followed by a heating treatment of the resulted precipitates. The as-prepared porous and hollow CoO microprisms displayed a high activity and stability for water oxidation in 1.0 M KOH solution. To reach a current density of 10 mA/cm2, a low overpotential of 280 mV is required. The remarkable activity can be attributed to the synergistic effect between two different but well-distributed CoO crystalline phases, uniform particle size, ameliorative crystallinity, high surface area and the low mass transfer resistance benefitted from the unique porous structure.

关键词: Cobalt oxide, Electrocatalysis, Oxygen evolution, Porous structure, Water oxidation

Abstract: Hollow metal oxide materials with nanometer-to-micrometer dimensions have attracted tremendous attention because of their potential applications in energy conversion and storage systems. Numerous efforts have been focused on developing versatile methods for the rational synthesis of various hollow structures to act as efficient water oxidation catalysts. In this work, a unique porous and hollow CoO tetragonal prism-like structure has been successfully synthesized via a facile and efficient co-precipitation method with polyvinylpyrrolidone (PVP K30) followed by a heating treatment of the resulted precipitates. The as-prepared porous and hollow CoO microprisms displayed a high activity and stability for water oxidation in 1.0 M KOH solution. To reach a current density of 10 mA/cm2, a low overpotential of 280 mV is required. The remarkable activity can be attributed to the synergistic effect between two different but well-distributed CoO crystalline phases, uniform particle size, ameliorative crystallinity, high surface area and the low mass transfer resistance benefitted from the unique porous structure.

Key words: Cobalt oxide, Electrocatalysis, Oxygen evolution, Porous structure, Water oxidation