화학공학소재연구정보센터
International Journal of Hydrogen Energy, Vol.45, No.11, 6500-6507, 2020
Interfaces engineering of MoNi-based sulfides electrocatalysts for hydrogen evolution reaction in both acid and alkaline media
Searching for efficiently noble-metal-free hydrogen evolution catalysts is critical to the development of hydrogen energy. In this work, we report an in-situ growing defect-rich heterointerfaces structure MoNi-based sulfides on carbon cloth via a facile and controllable hydrothermal process. The interface structure in MoNiS@NiS/CC can not only provide suffcient channel for transportation of electrolyte, but also release of produced gases in the catalytic process, thence enhance the sluggish hydrogen evolution efficiency. Furthermore, the defects in MoNiS@NiS/CC have significant impacts on hydrogen evolution behavior. Therefore, the as-synthesied MoNiS@NiS/CC shows a low overpotential of 33 mV to deliver a current density of 10 mAcm(-2) and a small tafel slope of 80 mVdec(-1), and also exhibits an excellent long-term stability in 0.5 M H2SO4. Additionaly, the MoNiS@NiS/CC offers outstanding hydrogen evolution reaction performances in 1 M KOH. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.