Hollow Pt skim-sandwiched Cu spheres supported on reduced graphene oxide-carbon nanotube architecture for efficient methanol electrooxidation. (8th March 2019)

• Record Type: Journal Article
• Authors: Guo, Miao; Tu, Qianyang; Wang, Longlu; Tang, Yanhong; Song, Hejie; Zhou, Jian; Zhang, Zezhong; Wang, Ying; Liu, Chengbin
• Is Part Of: International journal of hydrogen energy. Volume 44:Number 13(2019)
• Page Start: 6886
• Page End: 6895
• Publication Date: 2019-03-08
• Subjects: Carbon nanotubes -- Reduced graphene oxide -- Electrodeposition -- Hollow CuPt spheres -- Methanol electrooxidation; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2019.01.175
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: The disadvantages of high cost, easy poisoning and insufficient durability hinder platinum (Pt) application in direct methanol fuel cells. In this study, a hybrid of reduced graphene oxide/carbon nanotubes-supported hollow copper spheres (Cu/rGO@CNTs) is prepared by a one-step electrodeposition method. Then, the internal and external surfaces of hollow Cu spheres are coated with Pt skims to obtain a hollow bimetallic electrocatalyst (Pt/Cu/rGO@CNTs) through a simple galvanic replacement reaction by immersing Cu/rGO@CNTs in a chloroplatinic acid (H2 PtCl6 ) solution. The three dimensional rGO@CNTs network structure benefit mass transport and electron transfer. Pt skims expose abundant active sites for electrocatalytic methanol oxidation reactions (MORs). Cu cores synergize Pt skims to enhance anti-poison ability. As a result, Pt/Cu/rGO@CNTs shows an excellent electrocatalytic activity for MORs with a robust tolerance of catalyst poisoning. Highlights: Hollow Pt skim-sandwiched Cu spheres showing sufficient active sites. Graphene-carbon nanotube support benefiting mass diffusion and electron transfer. Good methanol electrooxidation performance with a high anti-poison ability.