Chinese Journal of Catalysis ›› 2018, Vol. 39 ›› Issue (4): 613-618.DOI: 10.1016/S1872-2067(17)62987-5

• Communications • Previous Articles     Next Articles

NiFe layered double-hydroxide nanoparticles for efficiently enhancing performance of BiVO4 photoanode in photoelectrochemical water splitting

Qizhao Wang, Tengjiao Niu, Lei Wang, Jingwei Huang, Houde She   

  1. College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, Gansu, China
  • Received:2017-12-03 Revised:2017-12-30 Online:2018-04-18 Published:2018-04-08
  • Contact: 10.1016/S1872-2067(17)62987-5
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21663027, 51262028, 21261021), the Science and Technology Support Project of Gansu Province (1504GKCA027), the Program for the Young Innovative Talents of Longyuan, the Program for Innovative Research Team (NWNULKQN-15-2) and the Undergraduate Academic Innovative Research Team of Northwest Normal University.

Abstract:

A bismuth vanadate (BiVO4) photoanode with a cocatalyst consisting of NiFe layered double-hydroxide (NiFe-LDH) nanoparticles was fabricated for photoelectrochemical (PEC) water splitting. NiFe-LDH nanoparticles, which can improve light-absorption capacities and facilitate efficient hole transfer to the surface, were deposited on the surface of the BiVO4 photoanode by a hydrothermal method. All the samples were characterized using X-ray diffraction, scanning electron microscopy, and diffuse-reflectance spectroscopy. Linear sweep voltammetry and current-time plots were used to investigate the PEC activity. The photocurrent response of NiFe-LDH/BiVO4 at 1.23 V vs the reversible hydrogen electrode was higher than those of Ni(OH)2/BiVO4, Fe(OH)2/BiVO4 and pure BiVO4 electrodes under visible-light illumination. NiFe-LDH/BiVO4 also gave a superior PEC hydrogen evolution performance. Furthermore, the stability of the NiFe-LDH/BiVO4 photoanode was excellent compared with that of the bare BiVO4 photoanode, and offers a novel method for solar-assisted water splitting.

Key words: NiFe layered double-hydroxide nanoparticles, BiVO4 photoanode, Photoelectrochemical water splitting, Photoelectrocatalysis