Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 9, Issue 21, Pages 18008-18014Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b05290
Keywords
interfacial electronic structure; Pt-based catalyst; hydrogen evolution reaction; ethanol oxidation reaction; crystal facets
Funding
- National Key Research and Development Program of China [2016YFFA0200400]
- Natural Science Foundation of China [51571100, 21275064]
- Specialized Research Fund for the Doctoral Program of Higher Education [20130061110035]
- Graduate Innovation Fund of Jilin University [2016075]
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Tailoring the interfacial structure of Pt-based catalysts has emerged as an effective strategy to improve catalytic activity. However, little attention has been focused on investigating the relationship between the interfacial facets and their catalytic activity. Here, we design and implement Pd-Pt interfaces with controlled heterostructure features by epitaxially growing Pt nanoparticles on Pd nanosheets. On the basis of both density functional theory calculation and experimental results, we demonstrate that charge transfer from Pd to Pt is highly dependent on the interfacial facets of Pd substrates. Therefore, the Pd-Pt heterostructure with Pd(100)-Pt interface exhibits excellent activity and long-term stability for hydrogen evolution and methanol/ethanol oxidation reactions in alkaline medium, much better than that with Pd (111)-Pt interface or commercial Pt/C. Interfacial crystal facet-dependent electronic structural modulation sheds a light on the design and investigation of new heterostructures for high-activity catalysts.
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