|
Promotion of Photoelectrochemical Performance of BiVO4 by Binary ZnCo-LDH Co-catalyst |
Author Name | Affiliation | E-mail | LI Na | Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, Tianyuan University of Technology, Taiyuan 030024, China | | WANG Mu-Heng | Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, Tianyuan University of Technology, Taiyuan 030024, China | | ZHAO Yong | Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, Tianyuan University of Technology, Taiyuan 030024, China | | YAO Rui | Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, Tianyuan University of Technology, Taiyuan 030024, China | | LIU Guang | Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, Tianyuan University of Technology, Taiyuan 030024, China | liuguang@tyut.edu.cn | LI Jin-Ping | Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, Tianyuan University of Technology, Taiyuan 030024, China | jpli211@hotmail.com |
|
Abstract: Bismuth vanadate (BiVO4) is one of the most promising photoanode materials for converting solar energy into hydrogen energy (STH). However, the practical application of BiVO4 is severely hindered by the intrinsically severe electron-hole recombination. Here, we reported bismuth vanadate (BiVO4) photoanode decorated with binary zinc-cobalt LDHs (ZnCo-LDH) co-catalyst by one-step electrodeposition method, which greatly enhances light absorption capacities of bismuth vanadate (BiVO4), accelerates water oxidation kinetics, facilitates efficient hole transfer to the surface and reduces the surface charge recombination. The hybrid photoanode exhibited a high photocurrent density of 2.85 mA·cm-2 at 1.23 V(vs RHE), which corresponds to a 259% increase compared to that of the pristine BiVO4 photoanode. Furthermore, the onset potential (Von) has greatly decreased from 930 to 270 mV, which displays that OER kinetics is improved upon the deposition of ZnCo-LDH. In addition, the BiVO4/ZnCo-LDH composite photoanode showed a high surface charge separation efficiency of 65%, which is 2.17 times that of BiVO4. |
Keywords: bismuth vanadate photoelectrochemical (PEC) properties zinc-cobalt LDH co-catalyst charge separation |
Hits: 2366 |
Download times: 771 |
LI Na,WANG Mu-Heng,ZHAO Yong,YAO Rui,LIU Guang,LI Jin-Ping.Promotion of Photoelectrochemical Performance of BiVO4 by Binary ZnCo-LDH Co-catalyst[J].Chinese Journal of Inorganic Chemistry,2019,35(10):1773-1780. |
View Full Text View/Add Comment Download reader |
|
|
|
|
|