am0c07804_si_001.pdf (305.46 kB)
The Role of Tungsten Oxide in Enhancing the Carbon Monoxide Tolerance of Platinum-Based Hydrogen Oxidation Catalysts
journal contribution
posted on 2020-08-07, 13:09 authored by Douglas W. G. Stewart, Keith Scott, Andrew J. Wain, Timothy E. Rosser, Edward Brightman, Donald Macphee, Mohamed MamloukSignificant reductions
in total cost of ownership can be realized by engineering PEM fuel
cells to run on low-purity hydrogen. One of the main drawbacks of
low-purity hydrogen fuels is the carbon monoxide fraction, which poisons
platinum electrocatalysts and reduces the power output below useful
levels. Platinum-tungsten oxide catalyst systems have previously shown
high levels of CO tolerance during both ex situ and in situ investigations.
In this work, we explore the mechanism of enhanced tolerance using
in situ electrochemical attenuated total reflection–infrared
(ATR-IR) and Raman spectroscopy methods and investigate, using a mixture
of Pt/C and WO3 powders, the role of the WV/WVI redox couple in the oxidation of adsorbed CO.
History
Usage metrics
Categories
Keywords
PtRolelow-purity hydrogen fuelsCO toleranceWO 3 powdersATR-IREnhancingelectrochemical attenuatedoxidationdrawbackRaman spectroscopy methodspoisons platinum electrocatalystsredoxPlatinum-tungsten oxide catalyst sy...mixturemechanismTungsten OxidecouplePlatinum-Based Hydrogen Oxidation C...ownershiproleVIengineering PEM fuel cellsCarbon Monoxide Tolerancereflectioninvestigationcarbon monoxide fractionlow-purity hydrogenpower output
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC