期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 45, 期 43, 页码 22883-22892出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2020.06.186
关键词
Transition metal nitrides; Electrochemical stability; Hydrogen evolution reaction; Density functional theory; Platinum modification
资金
- US Department of Energy, Office of Basic Energy Sciences, Catalysis Science Program [DE-FG02-13ER16381]
- U.S. Department of Energy, Office of Science, Office of Workforce Development for Teachers and Scientists, Office of Science Graduate Student Research (SCGSR) program
- DOE [DESC0014664]
Transition metal nitrides are interesting electrocatalytic support materials that have similar structure to their carbide counterparts while avoiding associated issues with carbonaceous overlayers resulting from carbide synthesis. This may allow for more intimate contact between the nitride substrate and metal-modifier to promote synergistic effects. In this work, tungsten nitride (WN) and niobium nitride (NbN) thin films were synthesized and evaluated for their stability across a wide range of potential-pH values. Low loadings of Pt were deposited on the nitride thin films and were evaluated for the hydrogen evolution reaction (HER) activity in acid and alkaline electrolytes. The observed activity trends correlate well with the hydrogen binding energies obtained from density functional theory (DFT) calculations. Pseudo-Pourbaix diagrams were generated for WN and NbN to aid in catalyst selection for other electrocatalytic reactions. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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