A highly efficient and stable biphasic nanocrystalline Ni–Mo–N catalyst for hydrogen evolution in both acidic and alkaline electrolytes. (April 2016)

• Record Type: Journal Article
• Authors: Wang, Teng; Wang, Xiaojuan; Liu, Yang; Zheng, Jie; Li, Xingguo
• Is Part Of: Nano energy. Volume 22(2016:Apr.)
• Page Start: 111
• Page End: 119
• Publication Date: 2016-04
• Subjects: Hydrogen evolution reaction -- Catalyst -- Ni–Mo -- Noble metal free -- Electrocatalysis; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2016.02.023
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: The hydrogen evolution reaction (HER) is of critical importance for sustainable hydrogen production from water electrolysis. In this work, we report a highly efficient and stable noble metal free HER catalyst, which is composed of homogeneously distributed metallic Ni and NiMo4 N5 nanocrystals. The biphasic nanocrystalline Ni–Mo–N catalyst shows very low overpotential (53 mV in 0.5 M H2 SO4 and 43 mV in 1 M KOH, at current density 20 mA/cm 2 ) and good stability for HER in both acidic and alkaline electrolytes, which is a promising low cost alternative for platinum based HER catalysts. Graphical abstract: Highlights: Excellent catalytic performance for the hydrogen evolution reaction. The biphasic nanocrystalline Ni–Mo–N catalyst shows low overpotential very close to that of commercial Pt/C catalyst and very excellent stability in both acidic and alkaline electrolytes. Combined merits for catalysis due to unique biphasic structure. The Ni–Mo–N catalyst is composed of homogeneously distributed nanocrystals of metallic Ni and Ni–Mo nitride, which combines the merits of high catalytic activity and good acid stability.