A novel support of nano titania modified graphitized nanodiamond for Pt electrocatalyst in direct methanol fuel cell. (13th April 2015)

• Record Type: Journal Article
• Authors: Zhao, Yuling; Wang, Yanhui; Zang, Jianbing; Lu, Jing; Xu, Xipeng
• Is Part Of: International journal of hydrogen energy. Volume 40:Number 13(2015)
• Page Start: 4540
• Page End: 4547
• Publication Date: 2015-04-13
• Subjects: TiO2 -- Graphitized nanodiamond -- Electrocatalyst -- Activity -- Stability; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2015.02.041
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Graphitized nanodiamond (GND) was prepared by annealing ND in a vacuum at temperature of 1300 °C for 2 h, followed by the synthesis of TiO2 modified GND (TiO2 /GND) using a microwave hydrolysis method. TiO2 /GND supported Pt (Pt/TiO2 /GND) electrocatalysts were synthesized by a microwave-assisted polyol process and characterized. Pt nanoparticles (NPs) supported on Vulcan XC-72 carbon (Pt/C) and TiO2 /C (Pt/TiO2 /C) catalysts were obtained according to the same method for comparison. The TiO2 /GND support showed much more excellent stability than carbon black and TiO2 /C in acid solution, and Pt/TiO2 /GND and Pt/TiO2 /C catalysts showed enhanced electrocatalytic activity for methanol oxidation and oxygen reduction due to the synergistic effect of Pt and support. It is worth mentioned that the Pt/TiO2 /GND demonstrated a better durability than the other two catalysts due to the higher stability of TiO2 /GND support and the anchoring effect of the TiO2 layer to Pt NPs. Highlights: Nano titania modified graphitized nanodiamond was used as support for Pt catalyst. The TiO2 /GND support possessed a higher stability than carbon black and TiO2 /C. The Pt/TiO2 /GND showed a higher catalytic activity for MOR and ORR. The Pt/TiO2 /GND had a better durability compared with the Pt/C and Pt/TiO2 /C.