A novel Pt@Te-reduced graphene oxide/polyimide composite catalyst for hydrogen evolution. (14th December 2015)

• Record Type: Journal Article
• Authors: Zhang, Aihua; Yu, Shengjiao; Jiang, Yimin; Jia, Lingpu; Xia, Xiaohong; Ye, Weichun; Wang, Chunming
• Is Part Of: International journal of hydrogen energy. Volume 40:Number 46(2015)
• Page Start: 16238
• Page End: 16247
• Publication Date: 2015-12-14
• Subjects: Pt@Te catalyst -- rGO/PI substrate -- Pt@Te-rGO/PI electrode -- Hydrogen evolution reaction; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2015.10.001
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: A promising Pt@Te nanoparticles catalyst has been synthesized on the surface of the reduced graphene oxide/polyimide (rGO/PI) substrate. First of all, Te was deposited on the rGO/PI using electrochemical deposition method to obtain Te-rGO/PI that has various morphologies. Secondly, a monolayer Pb film was deposited on the Te-rGO/PI by the similar electrochemical method to get a transition state material of Pb@Te-rGO/PI. Finally, the target Pt@Te catalyst on the rGO/PI with large surface area was obtained by a chemical oxidation method, in which Pb was stripped off from the Pb@Te-rGO/PI by an oxygenation of H2 PtCl6, while the oxygenation process, Pt replaced Pb to be deposited on the surface of Te-rGO/PI to form Pt@Te-rGO/PI. Then the prepared Pt@Te-rGO/PI was used as a working electrode to study the hydrogen evolution behavior in 0.5 mol/l H2 SO4 . By comparison the catalyst of sole Pt-rGO/PI nanoparticles, Pt@Te-rGO/PI catalyst considerably abated the demanding of Pt. And it shows excellent HER activities with a low overpotential of 0.1 V. The Tafel slope of 55 mV dec −1 reveals most likely the Volmer–Heyrovsky mechanism for hydrogen evolution reaction (HER). On the other hand, the catalyst displays satisfactory stability. This work may pave a potential pathway for synthesizing multi-morphology nano-Pt catalyst with high surface area for application in the study of HER. Highlights: Pt@Te-rGO/PI with nano-sphere and nano-flower structures were synthesized by redox replacement technique. Pt@Te catalyst considerably abated the demanding of Pt. Pt@Te-rGO/PI exhibited excellent electrocatalytic activity for HER. Pt@Te-rGO/PI nanoparticles show high stability for HER with a low overpotential of 0.1 V.