MOF-Derived Flower-like MoS2@TiO2 Nanohybrids with Enhanced Activity for Hydrogen Evolution

• Published in: ACS applied materials & interfaces Vol. 8; no. 40; pp. 26794 - 26800
• Main Authors: Ma, Bing, Guan, Pei-Yao, Li, Qiu-Ying, Zhang, Mei, Zang, Shuang-Quan
• Format: Journal Article
• Language: English
• Published: American Chemical Society 12.10.2016
• Subjects: photo- and electrocatalysis; MoS2@TiO2; flower-like nanohybrids; metal−organic frameworks; hydrogen evolution reaction
• ISSN: 1944-8244; 1944-8252
• DOI: 10.1021/acsami.6b08740

A simple hydrothermal method is developed for synthesizing crystalline MoS2@TiO2 nanohybrids with metal–organic framework (MOF) as precursor. At an optimal ratio of 14.6 wt % MoS2, the resultant material exhibits prominent catalytic activity for hydrogen evolution reaction (HER) with a high hydrogen production rate of 10 046 μmol h–1 g–1 under visible light illumination with fluorescein as photosensitizer. Furthermore, the synthesized catalyst also possesses an attractive electrocatalytic activity with an onset overpotential of −300 mV (vs RHE) and a Tafel slope of ∼81 mV dec–1. The enhanced catalyst performances are mainly attributed to the in situ formed active sites, featuring a uniform dispersion and strong connection of MoS2 and TiO2, which can facilitate electron transfer. In addition, the MoS2@TiO2 nanohybrids are highly stable and completely recyclable over HER.