AI Article Synopsis
- Hydrogen storage using artificial fuels like methanol is crucial for future energy and chemical processes, with electrochemical conversion being more favorable than direct water splitting.
- CO produced during methanol oxidation can poison conventional hydrogen-evolution catalysts, significantly decreasing their efficiency.
- Mo-based catalysts are found to be uniquely resistant to CO poisoning, likely because CO cannot bind to Mo under operational conditions, making them highly effective in polluted environments.
Article Abstract
Hydrogen storage in the form of intermediate artificial fuels such as methanol is important for future chemical and energy applications, and the electrochemical regeneration of hydrogen from methanol is thermodynamically favorable compared to direct water splitting. However, CO produced from methanol oxidation can adsorb to H -evolution catalysts and drastically reduce activity. In this study, we explore the origins of CO immunity in Mo-containing H -evolution catalysts. Unlike conventional catalysts such as Pt or Ni, Mo-based catalysts display remarkable immunity to CO poisoning. The origin of this behavior in NiMo appears to arise from the apparent inability of CO to bind Mo under electrocatalytic conditions, with mechanistic consequences for the H -evolution reaction (HER) in these systems. This specific property of Mo-based HER catalysts makes them ideal in environments where poisons might be present.
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| http://dx.doi.org/10.1002/chem.202100876 | DOI Listing |
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