Operando Time-Resolved X-ray Absorption Fine Structure Study for Surface Events on a Pt3Co/C Cathode Catalyst in a Polymer Electrolyte Fuel Cell during Voltage-Operating Processes
Citations Over TimeTop 10% of 2012 papers
Abstract
The structural kinetics of surface events on a Pt3Co/C cathode catalyst in a polymer electrolyte fuel cell (PEFC) was investigated by operando time-resolved X-ray absorption fine structure (XAFS) with a time resolution of 500 ms. The rate constants of electrochemical reactions, the changes in charge density on Pt, and the changes in the local coordination structures of the Pt3Co alloy catalyst in the PEFC were successfully evaluated during fuel-cell voltage-operating processes. Significant time lags were observed between the electrochemical reactions and the structural changes in the Pt3Co alloy catalyst. The rate constants of all the surface events on the Pt3Co/C catalyst were significantly higher than those on the Pt/C catalyst, suggesting the advantageous behaviors (cell performance and catalyst durability) on the Pt3Co alloy cathode catalyst.
Related Papers
- → A high performance non-noble metal electrocatalyst for the oxygen reduction reaction derived from a metal organic framework(2016)21 cited
- → XAFS applications in semiconductors(2006)8 cited
- → Aims of Electrocatalysis(2015)1 cited
- Preparation and characterization of La_(0.6) Ca_(0.4) CoO_3 as bifunctional oxygen electrode electrocatalyst(2004)
- XAFS applications in condensed matters(2007)