In situ x-ray absorption spectroscopy and x-ray diffraction of fuel cell electrocatalysts
Russell, Andrea E., Maniguet, Stephanie, Mathew, Rebecca J., Yao, Jun, Roberts, Mark A. and Thompsett, David (2001) In situ x-ray absorption spectroscopy and x-ray diffraction of fuel cell electrocatalysts. Journal of Power Sources, 96, (1), 226-232. (doi:10.1016/S0378-7753(01)00573-0).
Download
Full text not available from this repository.
Description/Abstract
The utility of in situ X-ray absorption spectroscopy (XAS) in determining structural parameters, through analysis of the extended X-ray absorption fine structure (EXAFS), and electronic perturbations, through a white line analysis of the X-ray absorption near edge structure (XANES), is demonstrated for Pt/C. PtRu/C and PtMo/C fuel cell electrodes. The results provide verification that the enhancement of CO tolerance of the alloy catalysts occurs via an intrinsic mechanism for the PtRu alloy, whilst a promotion mechanism is in operation for the PtMo alloy. Preliminary results of an in situ powder X-ray diffraction (XRD) method which utilises synchrotron radiation (SR) and a curved image plate detector are also presented, using Pd/C as an example. The lattice expansion upon formation of the P-hydride is clearly observed.
| Item Type: | Article |
|---|---|
| ISSNs: | 0378-7753 (print) |
| Related URLs: | |
| Keywords: | fuel cell catalysts, x-ray absorption spectroscopy, x-ray diffraction structure transformation, carbon, particles, state, xas |
| Subjects: | T Technology > TP Chemical technology Q Science > QD Chemistry |
| Divisions: | University Structure - Pre August 2011 > School of Chemistry |
| Item ID: | 19612 |
| Date Deposited: | 14 Feb 2006 |
| Last Modified: | 01 Apr 2012 00:59 |
| Contributors: | Russell, Andrea E. (Author) Maniguet, Stephanie (Author) Mathew, Rebecca J. (Author) Yao, Jun (Author) Roberts, Mark A. (Author) Thompsett, David (Author) |
| Date: | 1 June 2001 |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/19612 |
Actions (login required)
 |
View Item |
