Robust three dimensional N-doped graphene supported Pd nanocomposite as efficient electrocatalyst for methanol oxidation in alkaline medium. (1st June 2017)

• Record Type: Journal Article
• Authors: Chao, Lei; Qin, Yong; He, Jingjing; Ding, Dong; Chu, Fuqiang
• Is Part Of: International journal of hydrogen energy. Volume 42:Number 22(2017)
• Page Start: 15107
• Page End: 15114
• Publication Date: 2017-06-01
• Subjects: Pd nanoparticle -- N-doped graphene -- Robust three dimensional graphene -- Methanol oxidation -- Electrocatalyst; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2017.04.245
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Pd nanoparticles (PdNPs) with the diameter of ∼3.2 nm were successfully confined within a robust three dimensional (3D) N-doped porous graphene (R3DNG) via a polyol-assisted reduction strategy. The as-obtained PdNPs/R3DNG composite was characterized by SEM, TEM, XRD and XPS, and was conducted as electrocatalyst for methanol oxidation in alkaline medium. The results showed that PdNPs/R3DNG featured the remarkable electrocatalytic activity (2.71 A mg −1 Pd) and outstanding cyclic stability (66.5% forward peak current retention after 1000 cycles), which is even superior to the state-of-the-art Pt/C catalyst. The synergistic effect between the support of R3DNG and PdNPs is believed to be responsible for the outstanding electrocatalytic performance. Graphical abstract: Pd nanoparticles with a diameter of 3.2 nm are supported on robust 3D N-doped porous graphene. The resulting composite shows unprecedented electrocatalytic performance for methanol electro-oxidation in alkaline medium. Highlights: Ultrafine Pd nanoparticles are confined within robust 3D N-doped graphene. The composite exhibits remarkable electroactivity toward methanol oxidation. The robust 3D structure and abundant N atoms are responsible for the electrocatalysis.