P-n tungsten oxide homojunctions for Vis-NIR light-enhanced electrocatalytic hydrogen evolution

Bin Chang, Zizheng Ai, Dong Shi, Yueyao Zhong, Kang Zhang, Yongliang Shao, Lei Zhang, Jianxing Shen, Yongzhong Wu*, Xiaopeng Hao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


Based on energy band engineering theory, a p-n homojunction of metal oxides was designed to overcome the recombination of photogenerated carriers and inappropriate hydrogen adsorption energy. A novel p-n tungsten oxide homojunction was successfully synthesized by tuning oxygen vacancies and phosphorus-doping. Based on the synergies of Mxenes, a Vis-NIR light-enhanced electrocatalytic hydrogen evolution system was accomplished with a small overpotential of 44 mV (at 10 mA cm-2) and a low Tafel slope of 41 mV dec-1, which performed much more efficiently than in darkness and comparably to noble-metal catalysts (Pt and Pt/C). Moreover, the as-synthesized samples offered a distinct advantage of long-term stability for more than 24 h both with and without light irradiation. The design philosophy of p-n homojunctions opens a prospect of utilizing light-activated metal oxides to integrate catalysis with solar energy and electrical energy.

Original languageEnglish (US)
Pages (from-to)19573-19580
Number of pages8
Issue number33
StatePublished - 2019

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)


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