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Surfactant-Free Synthesis of Reduced Graphene Oxide Supported Well-Defined Polyhedral Pd-Pt Nanocrystals for Oxygen Reduction Reaction

1
Hebei Key Laboratory of Applied Chemistry, College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004, China
2
Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun 130103, China
*
Author to whom correspondence should be addressed.
Catalysts 2019, 9(9), 756; https://doi.org/10.3390/catal9090756
Received: 23 July 2019 / Revised: 25 August 2019 / Accepted: 2 September 2019 / Published: 9 September 2019
(This article belongs to the Section Electrocatalysis)
Well-defined polyhedral Pd-Pt nanocrystals anchored on the reduced graphene oxide (rGO) are successfully synthesized via a facile and efficient surfactant-free solvothermal route. The formation mechanism is carefully illustrated via tuning the surface state of rGO substrate and the Pd/Pt ratio in Pd-Pt nanocrystals. rGO substrates with continuous smooth surface, which can offer continuous 2D larger π electrons, play important roles in the formation of the well-defined polyhedral Pd-Pt nanocrystals. Suitable Pd/Pt ratio, which determines the affinity between the rGO substrate and polyhedral Pd-Pt nanocrystals, is another important factor for the formation of polyhedral Pd-Pt nanocrystals. Due to the well-defined surface of Pd-Pt nanocrystals, rich corners and edges from polyhedral structure, as well as more exposed (111) facets, the low-Pt polyhedral Pd-Pt nanocrystals anchored on rGO, used as electrocatalysts, exhibit high electrocatalytic activity for oxygen reduction reaction with excellent methanol tolerance. View Full-Text
Keywords: Pd-Pt nanocrystals; electrocatalysts; oxygen reduction reaction; reduced graphene oxide; polyhedral nanocrystals Pd-Pt nanocrystals; electrocatalysts; oxygen reduction reaction; reduced graphene oxide; polyhedral nanocrystals
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MDPI and ACS Style

Tang, Y.; Chen, T.; Guo, W. Surfactant-Free Synthesis of Reduced Graphene Oxide Supported Well-Defined Polyhedral Pd-Pt Nanocrystals for Oxygen Reduction Reaction. Catalysts 2019, 9, 756.

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