Researchers at the University of Maryland and Yeshiva University report the synthesis of PtMo alloy and MoOx@Pt core-shell nanoparticles (NPs). Both the carbon-supported alloy and core-shell NPs show substantially higher CO tolerance, compared to conventional commercialized E-TEK PtRu alloy and Pt catalyst.
These novel nanocatalysts can be potentially used as highly CO-tolerant anode electrocatalysts in proton exchange membrane fuel cells.
A paper on their work was published online 6 May in the Journal of the American Chemical Society.
Pure Pt anode electrocatalysts in proton exchange membrane fuel cells (PEMFCs) are severely poisoned by even trace amounts of CO that are ubiquitous in H2 fuels derived from reformed hydrocarbons. Bi-metallic Pt-M have been explored as one way to circumvent the problem, but synthesis of the materials has proven to be an issue.
The research team successfully developed new synthetic strategies for PtMo alloy and MoOx@Pt core-shell NPs. The work was supported by funding from the US Department of Energy and the University of Maryland Energy Research Center (UMERC).
Zhufang Liu, Jenny E. Hu, Qi Wang, Karen Gaskell, Anatoly I. Frenkel, Gregory S. Jackson and Bryan Eichhorn (2009) PtMo Alloy and MoOx@Pt Core-Shell Nanoparticles as Highly CO-Tolerant Electrocatalysts. J. Am. Chem. Soc., Article ASAP doi: 10.1021/ja901303d