Enhanced oxygen reduction at Pd catalytic nanoparticles dispersed onto heteropolytungstate-assembled poly(diallyldimethylammonium)-functionalized carbon nanotubes

D Wang; S Lu; P J Kulesza; C M Li; Roland De Marco; San Ping Jiang

doi:10.1039/c0cp02036b

Back

Enhanced oxygen reduction at Pd catalytic nanoparticles dispersed onto heteropolytungstate-assembled poly(diallyldimethylammonium)-functionalized carbon nanotubes

Journal article

Peer reviewed

Enhanced oxygen reduction at Pd catalytic nanoparticles dispersed onto heteropolytungstate-assembled poly(diallyldimethylammonium)-functionalized carbon nanotubes

D Wang, S Lu, P J Kulesza, C M Li, Roland De Marco and San Ping Jiang

Physical Chemistry Chemical Physics, Vol.13(10), pp.4400-4410

2011

DOI: https://doi.org/10.1039/c0cp02036b

Files and links (1)

url

https://doi.org/10.1039/c0cp02036bView

Published Version

Abstract

Both Keggin-type phosphotungstic acid (HPW) and Pd are not prominent catalysts towards the oxygen reduction (ORR), but their composite Pd-HPW catalyst produces a significantly higher electrochemical activity for the ORR in acidic media. The novel composite catalyst was synthesized by self-assembly of HPW on multi-walled carbon nanotubes (MWCNTs) via the electrostatic attraction between negatively charged HPW and positively charged poly(diallyldimethylammonium (PDDA)-wrapped MWCNTs, followed by dispersion of Pd nanoparticles onto the HPW-PDDA-MWCNT assembly. The as-prepared catalyst was characterized by transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy, thermal gravimetric analysis (TGA), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). TEM images show that Pd nanoparticles were uniformly dispersed on the surface of MWCNTs even when the Pd loading was increased to 60 wt%. Electrochemical activity of the catalysts for the ORR was evaluated by steady state polarization measurements using a rotating disk electrode. Compared with the acid treated MWCNTs, Pd nanoparticles supported on the HPW-assembled MWCNTs show a much higher ORR activity that is comparable to conventional Pt/C catalysts. The high electrocatalytic activities could be related to high dispersion of Pd nanoparticles as well as synergistic effects originating from the high proton conductivity of HPW. The Pd/HPW-PDDA-MWCNTs system as the cathode catalyst in proton exchange membrane fuel cells is demonstrated. © 2011 the Societies Owner.

Details

Title: Enhanced oxygen reduction at Pd catalytic nanoparticles dispersed onto heteropolytungstate-assembled poly(diallyldimethylammonium)-functionalized carbon nanotubes
Authors: D Wang (Author) - Curtin University
S Lu (Author) - Beihang University, China
P J Kulesza (Author) - University of Warsaw, Poland
C M Li (Author) - Nanyang Technological University, Singapore
Roland De Marco (Author) - Curtin University
San Ping Jiang (Author) - Curtin University
Publication details: Physical Chemistry Chemical Physics, Vol.13(10), pp.4400-4410
Publisher: Royal Society of Chemistry (R S C) Publications
Date published: 2011
DOI: 10.1039/c0cp02036b
ISSN: 1463-9076
Organisation Unit: University of the Sunshine Coast, Queensland; Office of the Deputy Vice-Chancellor (Research and Innovation)
Language: English
Record Identifier: 99448755902621
Output Type: Journal article

Metrics

2 File views/ downloads

341 Record Views

43 Times Cited - Web of Science

InCites Highlights

These are selected metrics from InCites Benchmarking & Analytics tool, related to this output

Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Chemistry, Physical; Physics, Atomic, Molecular & Chemical

UN Sustainable Development Goals (SDGs)

This output has contributed to the advancement of the following goals:

Source: InCites