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Synergy of Facet Control and Surface Metalloid Modification on Hierarchical Pt-Ni Nanoroses toward High Electrocatalytic Activity

Abstract

Driven by the need of high catalytic performance and low cost of Pt-based catalysts for methanol oxidation (MOR) and oxygen reduction reaction (ORR), we developed a highly active nitrogen species decorated Pt-Ni-N catalyst with tunable architectures and facets toward high catalytic activity. The synthetic procedure was conducted by a Ni2+-assisted morphology and facet transformation from nanoflowers (NFs) (111) to nanoparticles (NPs) (220), and simultaneously optimization of both hierarchical structure and active surface sites. It’s found that the adsorption of nitrogen species play critical roles in determining both facet control of Pt-Ni-N hierarchical structure and energetic activation of the catalytic reaction. Decorating of surface nitrogen species can effectually improve the relative content and electronic density of Pt0, leading to a hierarchical structure formation and a significantly improved catalytic activity toward both MOR and ORR compared with the Pt-Ni, Pt-N, as well as the commercial Pt/C catalysts, indicating a new strategy to highly efficient catalysts. Moreover, the results demonstrate that the catalytic enhancement is mainly due to the synergistic electronic effects among Pt, Ni, and N species.

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Publication details

The article was received on 07 Dec 2016, accepted on 08 Jul 2017 and first published on 10 Jul 2017


Article type: Paper
DOI: 10.1039/C6CE02520J
Citation: CrystEngComm, 2017, Accepted Manuscript
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    Synergy of Facet Control and Surface Metalloid Modification on Hierarchical Pt-Ni Nanoroses toward High Electrocatalytic Activity

    Q. Zhao, Q. Wang, Y. Su, K. Huang, G. Xu, Y. Li, J. Liu, B. Liu and J. Zhang, CrystEngComm, 2017, Accepted Manuscript , DOI: 10.1039/C6CE02520J

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