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

作者：Wang, Qizhao^*; Niu, Tengjiao; Wang, Lei; Huang, Jingwei; She, Houde

来源：Chinese Journal of Catalysis, 2018, 39(4): 613-618.

DOI：10.1016/S1872-2067(17)62987-5

• NiFe layered double-hydroxide nanoparticles
• BiVO4 photoanode
• Photoelectrochemical water splitting
• Photoelectrocatalysis

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 hydro thermal 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.

• 出版日期2018-4
• 单位西北师范大学