Journal
NANOSCALE
Volume 12, Issue 23, Pages 12497-12507Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0nr00048e
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Funding
- National Natural Science Foundation of China [11874141, 11904084, U1804130]
- Henan Overseas Expertise Introduction Center for Discipline Innovation [CXJD2019005]
- Swedish Research Council (Vetenskapsradet)
- Swedish National Strategic e-Science program eSSENCE
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The rational design of ideal catalysts for the oxygen reduction reaction (ORR) is of great significance for solving the electrocatalytic potential problems in proton exchange membrane fuel cells (PEMFCs). Pt-n(n= 1-4) and Pt3Au alloy subnanoclusters supported on a defective Ti(2)CO(2)monolayer with oxygen vacancies (denoted as v-Ti2CO2) are simulated by using density functional theory to investigate their ORR performance. The geometries, energetics, and electronic properties of the different systems are analyzed. It is found that the supported Pt3Au alloy subnanocluster possesses the best ORR activity. The underlying mechanisms of the improved ORR activity originates from the moderate hybridization between the O 2p and the 5d orbitals of Au and Pt according to the density of states analysis. Our study suggests a facile route for designing low-cost MXene-based electrocatalysts by alloying transition metals with Pt catalysts, which may stimulate realization of suitable alternative catalysts for ORR catalysis.
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