Ultra-thin PtFe-nanowires as durable electrocatalysts for fuel cells
Authors:
- Zhiyong ZhangZZZhiyong Zhang
- Meijun LiMLMeijun Li
- Zili WuZWZili Wu
- Wenzhen LiWLWenzhen Li
- 6 December 2010
- journal article
- Published by IOP Publishing in Nanotechnology
- Vol. 22 (1) , 015602
Abstract
Ultra-thin Pt(x)Fe(y)-nanowires (Pt(x)Fe(y)-NWs) with a diameter of 2-3 nm were successfully prepared through a solution-phase reduction method at Pt-Fe compositions from 1:1 to 2:1. The carbon supported Pt(x)Fe(y)-NWs (Pt(x)Fe(y)-NWs/C) demonstrated higher oxygen reduction reaction (ORR) activity and better electrochemical durability than conventional Pt/C catalyst. After 1000 cycles of 0-1.3 V (versus RHE), the relative electrochemical surface area (ECSA) of Pt(2)Fe(1)-NW/C dropped down to 46%, which was two times better than Pt/C catalyst, and the mass activity at 0.85 V (versus RHE) for Pt(1)Fe(1)-NW/C was 39.9 mA mg(-1)-(Pt), which is twice that for Pt/C (18.6 mA mg(-1)-(Pt)).Keywords
This publication has 25 references indexed in Scilit:
- Durability of Pt/graphitized carbon catalysts for the oxygen reduction reaction prepared by the nanocapsule methodPhysical Chemistry Chemical Physics, 2010
- Synthesis and Oxygen Reduction Electrocatalytic Property of Pt-on-Pd Bimetallic HeteronanostructuresJournal of the American Chemical Society, 2009
- Scientific Aspects of Polymer Electrolyte Fuel Cell Durability and DegradationChemical Reviews, 2007
- Stabilization of Platinum Oxygen-Reduction Electrocatalysts Using Gold ClustersScience, 2007
- The stability of Pt–M (M=first row transition metal) alloy catalysts and its effect on the activity in low temperature fuel cellsJournal of Power Sources, 2006
- Durability investigation of carbon nanotube as catalyst support for proton exchange membrane fuel cellJournal of Power Sources, 2006
- Activity benchmarks and requirements for Pt, Pt-alloy, and non-Pt oxygen reduction catalysts for PEMFCsApplied Catalysis B: Environment and Energy, 2005
- Instability of Pt∕C Electrocatalysts in Proton Exchange Membrane Fuel CellsJournal of the Electrochemical Society, 2005
- Microstructural Changes of Membrane Electrode Assemblies during PEFC Durability Testing at High Humidity ConditionsJournal of the Electrochemical Society, 2005
- Alternative energy technologiesNature, 2001