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Energies 2009, 2(4), 873-899; doi:10.3390/en20400873
Review

Transition Metal Carbides and Nitrides as Electrode Materials for Low Temperature Fuel Cells

 and
*
Eco-friendly Catalysis and Energy Laboratory (NRL), Department of Chemical Engineering, School of Environmental Science and Engineering, Pohang University of Science and Technology, San 31, Hyoja-dong, Pohang 790-784, Korea
* Author to whom correspondence should be addressed.
Received: 28 August 2009 / Accepted: 25 September 2009 / Published: 13 October 2009
(This article belongs to the Special Issue Fuel Cells)
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Abstract

Transition metal carbides (TMCs) and transition metal nitrides (TMNs) have attracted attention as promising electrocatalysts that could replace noble metals of high price and limited supply. Relative to parent metals, TMC and TMN behave like noble metals for electrochemical reactions such as oxidation of hydrogen, CO and alcohols, and reduction of oxygen. When TMC and TMN are combined with other metals, the electrocatalytic synergy is often observed in electrochemical reactions. Thus, combinations with a minute amount of Pt or even non-Pt metals give performance comparable to heavily loaded Pt-based electrocatalysts for low temperature fuel cells. It appears that TMC based electrocatalysts are more active as anode catalysts for oxidation of fuels, whereas TMN based catalysts are more active for cathode catalysts for oxygen reduction and more stable.
Keywords: transition metal carbide; transition metal nitride; low temperature fuel cells transition metal carbide; transition metal nitride; low temperature fuel cells
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Ham, D.J.; Lee, J.S. Transition Metal Carbides and Nitrides as Electrode Materials for Low Temperature Fuel Cells. Energies 2009, 2, 873-899.

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