Carbon-protected bimetallic carbide nanoparticles for a highly efficient alkaline hydrogen evolution reaction
- 12 January 2015
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Nanoscale
- Vol. 7 (7), 3130-3136
- https://doi.org/10.1039/c4nr06295g
Abstract
The hydrogen evolution reaction (HER) is one of the two important half reactions in current water-alkali and chlor-alkali electrolyzers. To make this reaction energy-efficient, development of highly active and durable catalytic materials in an alkaline environment is required. Herein we report the synthesis of carbon-coated cobalt–tungsten carbide nanoparticles that have proven to be efficient noble metal-free electrocatalysts for alkaline HER. The catalyst affords a current density of 10 mA cm−2 at a low overpotential of 73 mV, which is close to that (33 mV) required by Pt/C to obtain the same current density. In addition, this catalyst operates stably at large current densities (>30 mA cm−1) for as long as 18 h, and gives nearly 100% Faradaic yield during alkaline HER. The excellent catalytic performance (activity and stability) of this nanocomposite material is attributed to the cooperative effect between nanosized bimetallic carbide and the carbon protection layer outside the metal carbide. The results presented herein offer the exciting possibility of using carbon-armoured metal carbides for an efficient alkaline HER, although pristine metal carbides are not, generally, chemically stable enough under such strong alkaline conditions.This publication has 40 references indexed in Scilit:
- Nanosized tungsten carbide synthesized by a novel route at low temperature for high performance electrocatalysisScientific Reports, 2013
- Highly active and durable nanostructured molybdenum carbide electrocatalysts for hydrogen productionEnergy & Environmental Science, 2013
- Amorphous molybdenum sulfide films as catalysts for electrochemical hydrogen production in waterChemical Science, 2011
- Solar Energy Supply and Storage for the Legacy and Nonlegacy WorldsChemical Reviews, 2010
- Hydrogen adsorption on model tungsten carbide surfacesCatalysis Today, 2009
- Electrocatalytic and corrosion behaviour of tungsten carbide in near-neutral pH electrolytesApplied Catalysis B: Environment and Energy, 2009
- New synthesis of tungsten carbide particles and the synergistic effect with Pt metal as a hydrogen oxidation catalyst for fuel cell applicationsApplied Catalysis A: General, 2007
- Tungsten Monocarbide as Potential Replacement of Platinum for Methanol ElectrooxidationThe Journal of Physical Chemistry C, 2007
- Preparation and characterization of low overvoltage transition metal alloy electrocatalysts for hydrogen evolution in alkaline solutionsElectrochimica Acta, 1984
- Electronic Structure and Catalytic Behavior of Tungsten CarbideScience, 1974