Solar Hydrogen Production from Zinc Telluride Photocathode Modified with Carbon and Molybdenum Sulfide

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• 作者：Youn Jeong Jang ; Jaehyuk Lee ; Jinwoo Lee ; Jae Sung Lee
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：March 30, 2016
• 年：2016
• 卷：8
• 期：12
• 页码：7748-7755
• 全文大小：579K
• ISSN：1944-8252

文摘

A zinc telluride (ZnTe) film modified with MoS₂ and carbon has been studied as a new photocathode for solar hydrogen production from photoelectrochemical (PEC) water splitting. The modification enhances PEC activity and stability of the photocathode. Thus, the MoS₂/C/ZnTe/ZnO electrode exhibits highly improved activity of −1.48 mA cm^–2 at 0 V_RHE with a positively shifted onset potential up to 0.3 V_RHE relative to bare ZnO/ZnTe electrode (−0.19 mA cm^–2, 0.18 V_RHE) under the simulated 1 sun illumination. This represents the highest value ever reported for ZnTe-based electrodes in PEC water splitting. The carbon densely covers the surface of ZnTe to protect it against photocorrosion in aqueous electrolyte and improves charge separation. In addition, MoS₂ further enhances the PEC performance as a hydrogen evolution co-catalyst.