Zheng Meng, Chen Qianqiao, Zhong Qin
School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
Dalton Trans. 2021 Oct 5;50(38):13320-13328. doi: 10.1039/d1dt01948a.
The 1T-MoS/NiCoS composite grown on carbon cloth (CC) was successfully prepared by a two-step hydrothermal method as an efficient electrode for the hydrogen evolution reaction. The morphology and composition characterization show that the composite has a flower-like structure with a large number of edges and surfaces exposed, and the content of the 1T phase in MoS is 63%. 1T-MoS/NiCoS/CC exhibits an overpotential of 107 mV at 10 mA cm, and a Tafel slope of 66.4 mV dec in an alkaline electrolyte. After continuous electrolysis for 24 h at an overpotential of 170 mV, 86% of the original current density was retained in an chronoamperometry measurement. The outstanding catalytic performance of the composite is ascribed to its unique structure, high 1T-MoS content and the synergistic catalysis between 1T-MoS and NiCoS. This work provides a facile and effective strategy for fabricating the 1T-MoS/NiCoS/CC composite and demonstrates that the composite is expected to be a competitive non-noble HER catalyst.
通过两步水热法成功制备了生长在碳布（CC）上的1T-MoS/NiCoS复合材料，作为析氢反应的高效电极。形貌和成分表征表明，该复合材料具有花状结构，大量边缘和表面暴露，MoS中1T相的含量为63%。在碱性电解质中，1T-MoS/NiCoS/CC在10 mA cm时的过电位为107 mV，塔菲尔斜率为66.4 mV dec。在170 mV过电位下连续电解24 h后，计时电流法测量中保留了86%的原始电流密度。该复合材料优异的催化性能归因于其独特的结构、高含量的1T-MoS以及1T-MoS与NiCoS之间的协同催化作用。这项工作为制备1T-MoS/NiCoS/CC复合材料提供了一种简便有效的策略，并证明该复合材料有望成为一种有竞争力的非贵金属析氢催化剂。
