Journal
CHEMICAL SCIENCE
Volume 9, Issue 9, Pages 2469-2473Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7sc05486f
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Funding
- National Natural Science Foundation of China [51575217, 51572097]
- Thousand Young Talents Plan
- Recruitment Program of Global Experts
- Program for Changjiang Scholars and Innovative Research Team in University [IRT13017]
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CO oxidation is a widely used model system for understanding fundamental aspects of heterogeneous catalysis. While platinum (Pt) continues to be a reference material for CO oxidation catalysis, poisoning of Pt catalysts presents a critical issue that blocks reaction sites and impedes subsequent reaction steps. Fabrication of CO poison-free Pt catalysts remains a great challenge due to its CO-philic nature. Herein, we report a Pt based catalyst to effectively tackle CO poisoning by tightly anchoring Pt sub-nanoclusters onto Mn-mullite oxide (SmMn2O5) via atomic layer deposition. Superior CO oxidation activity has been observed with a significantly lowered light-off temperature and apparent activation energy. In situ diffuse reflectance infrared Fourier transform spectroscopy analysis, oxygen isotope experiments and density functional theory calculations confirm that the low-temperature activity originates from active oxygen atom sources at the bifunctional interface structure.
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