Phosphorous-doped molybdenum disulfide anchored on silicon as an efficient catalyst for photoelectrochemical hydrogen generation

Chih Jung Chen, Vediyappan Veeramani, Yi Hsiu Wu, Anirudha Jena, Li Chang Yin, Ho Chang, Shu Fen Hu, Ru Shi Liu*

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

15 引文 斯高帕斯(Scopus)

摘要

Herein, molybdenum disulfide (MoS2) integrated on Si pyramids was used as a co-catalyst to improve charge separation efficiency. Various quantities of phosphorus (P) heteroatoms were doped into MoS2 materials to boost catalytic performance. Raman and extended X-ray absorption fine structure spectra showed that the introduction of P dopants increased the number of exposed edges and sulfur vacancies that acted as hydrogen evolution reaction (HER) active sites on MoS2 and enhanced photoelectrochemical activity. Density functional theory calculations revealed that the HER inert basal plane of MoS2 became catalytically active after P atoms doping. MoS1.75P0.25/Si pyramids presented the optimal onset potential of +0.29 V (vs. RHE) and current density −23.8 mA cm−2. A titanium dioxide (TiO2) layer was prepared through atomic layer deposition and served as a passivation layer that improved photocathode stability. The photocurrent retention of MoS1.75P0.25/10 nm TiO2/Si pyramids was 84.0% after 2 h of chronoamperometric measurement.

原文英語
文章編號118259
期刊Applied Catalysis B: Environmental
263
DOIs
出版狀態已發佈 - 2020 四月

ASJC Scopus subject areas

  • 催化
  • 環境科學 (全部)
  • 製程化學與技術

指紋

深入研究「Phosphorous-doped molybdenum disulfide anchored on silicon as an efficient catalyst for photoelectrochemical hydrogen generation」主題。共同形成了獨特的指紋。

引用此