One-pot synthesis of PtRh/β-CD-CNTs for methanol oxidation. (16th November 2015)

• Record Type: Journal Article
• Authors: Li, Li; Tian, Chunxia; Yang, Junshuai; Zhang, Xiaohua; Chen, Jinhua
• Is Part Of: International journal of hydrogen energy. Volume 40:Number 43(2015)
• Page Start: 14866
• Page End: 14874
• Publication Date: 2015-11-16
• Subjects: Platinum -- Rhodium -- Electrocatalysts -- Methanol oxidation; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2015.09.021
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Taking beta-cyclodextrin (β-CD) as reducting agent and dispersant, PtRh nanoparticles with varied metal composition were uniformly deposited on the β-CD functionalized carbon nanotubes (β-CD-CNTs) by one-pot hydrothermal synthesis method. Fourier transform infrared spectroscopy and thermogravimetric analysis were used to demonstrate the successful modification of CNTs with β-CD. The morphology, chemical composition and structure of the β-CD-CNTs supported PtRh catalysts (PtRh/β-CD-CNTs) have been characterized by transmission electron microscopy, X-ray diffraction and energy dispersive X-ray spectroscopy, respectively. Their electrochemical performances were investigated by typical electrochemical technologies. The results indicate that PtRh/β-CD-CNTs catalyst with 1:1 atomic ratio of Pt/Rh (Pt1 Rh1 /β-CD-CNTs) shows superior electrocatalytic properties towards methanol oxidation. In addition, compared with the acid-treatment CNTs (AO-CNTs) supported PtRh nanoparticles (PtRh/AO-CNTs) prepared by typical NaBH4 reduction, Pt1 Rh1 /β-CD-CNTs exhibits more excellent electrocatalytic performance for methanol electro-oxidation due to the smaller particle size and more uniform deposition of PtRh nanoparticles. Highlights: PtRh nanoparticles were uniformly deposited on β-CD modified CNTs by one-pot method. β-CD acts as reducing agent of metal ions and dispersant of CNTs. Pt1 Rh1 /β-CD-CNTs show superior electrocatalytic performances for methanol oxidation.