Wang Yu Lei, Li Yu Hang, Wang Xue Lu, Chen Ai Ping, Yang Hua Gui
Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P. R. China.
Chempluschem. 2017 Feb;82(2):199-203. doi: 10.1002/cplu.201600445. Epub 2016 Oct 12.
Doping has been widely used to engineer efficient photocatalysts for the water-splitting process in energy conversion and storage systems. Although composition tuning through heteroatom doping is one of the strategies to enhance photoactivity, the origin of the increased activity by doping remains unclear and most illustrations of its role fall in the band engineering area. Herein, it is reported that the rhodium dopants on the surface of Zn GeO , which affect the band structure negligibly, can act as active sites for water splitting. As a result, the Rh /Zn GeO photocatalyst demonstrates excellent stability for up to 460 days and significant enhancement of the photocatalytic activity to that of the undoped photocatalyst. The findings in this work may open the door for a rethink of the detailed principles of dopants in photocatalysis, and highlight a feasible route to fabricating efficient photocatalysts.
在能量转换和存储系统中，掺杂已被广泛用于设计用于水分解过程的高效光催化剂。尽管通过杂原子掺杂进行成分调节是增强光活性的策略之一，但掺杂导致活性增加的原因仍不清楚，并且其作用的大多数解释都属于能带工程领域。在此，据报道，ZnGeO表面的铑掺杂剂对能带结构的影响可忽略不计，但可作为水分解的活性位点。结果，Rh/ZnGeO光催化剂在长达460天的时间内表现出优异的稳定性，并且光催化活性比未掺杂的光催化剂有显著提高。这项工作的发现可能为重新思考光催化中掺杂剂的详细原理打开大门，并突出了一条制备高效光催化剂的可行途径。
