Department of Chemistry, Faculty of Science, Bilkent University, 06800, Ankara, Turkey.
UNAM - National Nanotechnology Research Center, Institute of Materials Science and Nanotechnology, Bilkent University, 06800, Ankara, Turkey.
ChemSusChem. 2021 Jan 21;14(2):679-685. doi: 10.1002/cssc.202002279. Epub 2020 Nov 19.
The development of earth-abundant photocatalytic assemblies has been one of the bottlenecks for the advancement of scalable water splitting cells. In this study, a ZnCr layered double hydroxide and a CoFe Prussian blue analogue are combined to afford an earth-abundant photocatalytic assembly involving a visible light-absorbing semiconductor (SC) and a water oxidation catalyst (WOC). Compared to bare ZnCr-LDH, the SC-WOC hybrid assembly exhibits a threefold enhancement in photocatalytic activity, which is maintained for 6 h under photocatalytic conditions at pH 7. The band energy diagram was extracted from optical and electrochemical studies to elucidate the origin of the enhanced photocatalytic performance. This study marks a straightforward pathway to develop low-cost and precious metal-free assemblies for visible light-driven water oxidation.
丰富的地球资源光催化组件的发展一直是可扩展水分解电池发展的瓶颈之一。在这项研究中，将 ZnCr 层状双氢氧化物和 CoFe 普鲁士蓝类似物组合在一起，提供了一种包含可见光吸收半导体 (SC) 和水氧化催化剂 (WOC) 的丰富地球资源光催化组件。与裸 ZnCr-LDH 相比，SC-WOC 混合组件的光催化活性提高了三倍，在 pH 值为 7 的光催化条件下保持 6 小时。从光学和电化学研究中提取能带能量图，以阐明增强光催化性能的起源。这项研究为开发用于可见光驱动水氧化的低成本和无贵金属组件提供了一条直接途径。
