Simple wet-chemical synthesis of alloyed PdAu nanochain networks with improved electrocatalytic properties. (10th September 2015)

• Record Type: Journal Article
• Authors: He, Li-Li; Song, Pei; Feng, Jiu-Ju; Huang, Wen-Hua; Wang, Qiao-Li; Wang, Ai-Jun
• Is Part Of: Electrochimica acta. Volume 176(2015)
• Page Start: 86
• Page End: 95
• Publication Date: 2015-09-10
• Subjects: Bimetallic nanochain networks -- Allantoin -- Wet-chemical synthesis -- Methanol oxidation reaction -- Oxygen reduction reaction; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2015.06.137
• Languages: English
• ISSNs: 0013-4686

Abstract

Graphical abstract: PdAu alloyed nanochain networks were prepared by a simple and facile one-pot wet-chemical method using allantoin as the structure-directing agent and stabilizing agent. The as-prepared nanocrystals displayed improved catalytic performances for ORR and MOR as compared to commercial Pd black catalyst. Highlights: Bimetallic PdAu nanochain networks were synthesized by a simple and facile one-pot wet-chemical approach. Allantoin was used as the structure-directing agent and stabilizing agent. The PdAu nanocrystals had large electrochemical active surface area. The PdAu nanocrystals showed highly catalytic activity and good stability for ORR and MOR. Abstract: Bimetallic PdAu alloyed nanochain networks (PdAu NCNs) were facilely prepared by a simple wet-chemical method with the assistance of allantoin as the structure-directing agent and stabilizing agent. Allantoin played an important role in the formation of chain-like networks. The products were mainly characterized by transmission electron microscopy (TEM), high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy. The as-prepared PdAu NCNs had enlarged electrochemical active surface area, and displayed enhanced electrocatalytic activity toward oxygen reduction reaction (ORR) and methanol oxidation reaction (MOR), showing higher resistance to poisoning CO-like intermediates in MOR and more positive onset potential in ORR as compared to commercial Pd black catalyst. This approach provides a promising route for large-scale preparation of desirable bimetallic catalysts with the assistance of small biomolecules.