Electrodeposited p-type Cu2O for H2 evolution from photoelectrolysis of water under visible light illumination

Jun Nan Nian, Che Chia Hu, Hsisheng Teng

研究成果: Article同行評審

206 引文 斯高帕斯(Scopus)

摘要

Electrochemical deposition of p-type Cu2O films on transparent conducting glass from a Cu2SO4 solution was conducted at different temperatures. The films were examined for H2 evolution from photoelectrolysis of water under visible light illumination. Using Pt as the counter electrode, photocurrents with corresponding H2 evolution could be observed for the deposited Cu2O films in a Na2SO4 solution under a cathodic bias. The Cu2O films obtained at different deposition temperatures were in the cubic phase, but showed different out-of-plane crystalline orientations. An incident monochromatic photon-to-current conversion efficiency of 26% at 400 nm was achieved for a Cu2O film with a [1 1 1] out-of-plane orientation, while an efficiency of only 17% was obtained for a film with a [1 1 0] orientation. The [1 1 1]-oriented film exhibited a higher electronic conductivity, which might have led to a higher charge delocalization rate. By coupling with an n-type WO3 film to promote charge transport, the photocurrent for the Cu2O films was significantly improved.

原文English
頁(從 - 到)2897-2903
頁數7
期刊International Journal of Hydrogen Energy
33
發行號12
DOIs
出版狀態Published - 2008 六月

All Science Journal Classification (ASJC) codes

  • 可再生能源、永續發展與環境
  • 燃料技術
  • 凝聚態物理學
  • 能源工程與電力技術

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