负载TiO纳米颗粒的MoS纳米管用于增强电催化析氢。

Feng Bo, Liu Chuntao, Yan Weiyi, Geng Jianxin, Wang Guimin

School of Chemistry and Materials Science, Heilongjiang University Harbin 150080 PR China

Key Laboratory of Chemical Engineering Process & Technology for High-efficiency Conversion, School of Chemistry and Materials Science, Heilongjiang University Harbin 150080 PR China.

RSC Adv. 2019 Aug 23;9(45):26487-26494. doi: 10.1039/c9ra05041h. eCollection 2019 Aug 19.

Efficient and stable non-precious metal catalysts composed of earth-abundant elements are crucial to the hydrogen evolution reaction (HER) in high-energy conversion efficiency. Herein, TiO/MoS-NTs catalyst, in which the MoS nanotubes were loaded with TiO nanoparticles, have been synthesized a facile solvothermal and hydrothermal method. The as-prepared TiO/MoS-NTs electrocatalyst demonstrated enhanced electrocatalytic hydrogen evolution performance compared with MoS-NTs. Electrochemical measurements reveal the overpotential and Tafel slope of as-prepared TiO/MoS-NTs are -0.21 V and 42 mV dec. The HER improvement is proposed to be attributed to the increased edge sites results from the interfaces and synergic effect between TiO nanoparticles and MoS nanotubes.

由地球上储量丰富的元素组成的高效稳定非贵金属催化剂对于实现高能量转换效率的析氢反应（HER）至关重要。在此，通过简便的溶剂热和水热法合成了TiO/MoS-NTs催化剂，其中MoS纳米管负载有TiO纳米颗粒。与MoS-NTs相比，所制备的TiO/MoS-NTs电催化剂表现出增强的电催化析氢性能。电化学测量表明，所制备的TiO/MoS-NTs的过电位和塔菲尔斜率分别为-0.21 V和42 mV dec。HER性能的提高被认为归因于TiO纳米颗粒与MoS纳米管之间的界面和协同效应导致边缘位点增加。