光电流
结晶度
材料科学
溶胶凝胶
光催化
分解水
煅烧
化学工程
薄膜
光电阴极
微观结构
沉积(地质)
图层(电子)
化学计量学
相(物质)
纳米技术
催化作用
光电子学
复合材料
化学
生物
量子力学
物理
工程类
电子
古生物学
有机化学
生物化学
沉积物
作者
J. Toupin,Henri Strubb,Stéphane Kressman,Vincent Artero,Natacha Krins,Christel Laberty‐Robert
标识
DOI:10.1007/s10971-018-4896-3
摘要
CuO is an attractive photocatalytic material for water splitting due to its high earth abundance and low cost. In this paper, we report the deposition of CuO thin films by sol–gel dip-coating process. Sol deposition has attractive advantages including low-cost solution processing and uniform film formation over large areas with a fairly good control of the film stoichiometry and thickness. Pure CuO phase was obtained for calcination temperatures higher than 360 °C in air. The CuO photocurrents for hydrogen evolution depend on the crystallinity and the microstructure of the film. Values of −0.94 mA cm−2 at pH = 8 and 0 V vs. RHE were achieved for CuO photoelectrodes annealed at 400 °C under air. More interestingly, the stability of the photoelectrode was enhanced upon the sol–gel deposition of a TiO2 protective layer. In this all sol–gel CuO/TiO2 photocathode, a photocurrent of −0.5 mA cm−2 is achieved at pH = 7 and 0 V vs. RHE with a stability of ~100% over 600 s.
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