articleACS CatalysisDec 21, 2016Closed access

Water-Mediated Mars–Van Krevelen Mechanism for CO Oxidation on Ceria-Supported Single-Atom Pt 1 Catalyst

CWChunlei WangXGXiang‐Kui GuHYHuan YanYLYue LinJLJunjie Li

University of Science and Technology of China · Hefei National Center for Physical Sciences at Nanoscale · +1 more institution

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Abstract

In water-promoted CO oxidation, water was thought not to directly participate in CO2 production. Here we report that via a water-mediated Mars–van Krevelen (MvK) mechanism, water can directly contribute to about 50% of CO2 production on a single-atom Pt1/CeO2 catalyst. The origin is the facile reaction of CO with the hydroxyl from dissociated water to yield the carboxyl intermediate, which dehydrogenates subsequently with the help of a lattice hydroxyl to generate CO2 and water. The water-mediated MvK type reaction found here provides new insights in the promotion role of water in heterogeneous catalysis.

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Topics & keywords

Topics
Keywords
  • Catalysis
  • Chemistry
  • Water-gas shift reaction
  • Reaction mechanism
  • Photochemistry
  • Heterogeneous catalysis
  • Organic chemistry
UN Sustainable Development Goals
  • Clean water and sanitation
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