Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH) , Pohang 790-784, South Korea.
School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) , Ulsan 689-798, South Korea.
ACS Appl Mater Interfaces. 2016 Mar;8(12):7748-55. doi: 10.1021/acsami.5b07575. Epub 2016 Mar 17.
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 VRHE with a positively shifted onset potential up to 0.3 VRHE relative to bare ZnO/ZnTe electrode (-0.19 mA cm(-2), 0.18 VRHE) 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.
一种碲化锌（ZnTe）薄膜经过 MoS2 和碳的修饰，被研究作为光电化学（PEC）水分解制氢的新型光阴极。修饰提高了光阴极的PEC 活性和稳定性。因此，MoS2/C/ZnTe/ZnO 电极在模拟的 1 个太阳光照射下，表现出极高的活性，在 0 VRHE 时为-1.48 mA cm(-2)，相对于裸 ZnO/ZnTe 电极（-0.19 mA cm(-2)，0.18 VRHE），起始电位正移至 0.3 VRHE。这代表了 PEC 水分解中基于 ZnTe 的电极的最高值。碳在 ZnTe 表面密集覆盖，以防止其在水溶液电解质中光腐蚀，并提高电荷分离。此外，MoS2 进一步作为析氢共催化剂提高了 PEC 性能。
