Facile synthesis of uniform AuPd@Pd nanocrystals supported on three-dimensional porous N-doped reduced graphene oxide hydrogels as highly active catalyst for methanol oxidation reaction. (20th September 2016)

• Record Type: Journal Article
• Authors: Yu, Dan-Xia; Wang, Ai-Jun; He, Li-Li; Yuan, Junhua; Wu, Liang; Chen, Jian-Rong; Feng, Jiu-Ju
• Is Part Of: Electrochimica acta. Volume 213(2016)
• Page Start: 565
• Page End: 573
• Publication Date: 2016-09-20
• Subjects: Core-shell nanocrystals -- Ethylenediamine -- Reduced graphene oxide hydrogels -- Methanol oxidation reaction; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2016.07.141
• Languages: English
• ISSNs: 0013-4686

Abstract

Graphical abstract: Highlights: Porous AuPd@PdNCs(*)/N-RGOH is prepared by a facile two-step strategy. EDA is used as the doping and assembly agents for N-RGOH. EDA serves as the structure-director in the formation of AuPd@Pd NCs. The nanocomposites provide enlarged electrochemically active surface area. The nanocomposites display improved catalytic activity and stability for MOR. Abstract: Porous reduced graphene oxide hydrogels (RGOH), especially as supports for immobilizing metallic nanocrystals have attracted great attention in advanced nanomaterials, which have broad applications in catalysis, sensing and electric/optical devices. Herein, uniform core-shell AuPd@Pd nanocrystals supported on three-dimensional (3D) porous N-doped RGOH (AuPd@Pd NCs/N-RGOH) are facilely prepared by combining hydrothermal treatment with wet-chemical co-reduction. Ethylenediamine (EDA) is used as the nitrogen source and assembly agent for N-RGOH under hydrothermal conditions, and also as the structure-director for AuPd@Pd NCs during the wet-chemical co-reduction process. The nanocomposites display enhanced catalytic activity and stability for methanol oxidation reaction (MOR) in comparison with Pd NPs/N-RGOH and commercial Pd-C catalysts, owing to the unique structure and abundant nitrogen of N-RGOH, along with the synergistic effects between N-RGOH and AuPd@Pd NCs.