Effect of the Pre-Treatment of Carbon Black Supports on the Activity of Fe-Based Electrocatalysts for the Reduction of Oxygen
作者： H. Wang , R. Côté, , G. Faubert , D. Guay , J. P. Dodelet
DOI: 10.1021/JP9821735
关键词: Rotating disk electrode 、 Inorganic chemistry 、 Thermal treatment 、 Oxygen 、 Inert gas 、 Carbon 、 Adsorption 、 Carbon black 、 Reduction (complexity) 、 Chemistry
摘要: A method involving HNO3/NH3 treatments of a carbon support (Vulcan XC-72R), addition Fe from inorganic precursors, and thermal treatment at 900 °C under an inert atmosphere for the preparation Fe-based oxygen reduction electrocatalysts use in polymer electrolyte fuel cells has been investigated. The prepared materials were evaluated acidic medium by rotating disk electrode technique using potential peak, Ep, as measure electrocatalytic activity. Two sets experiments performed: (i) varying conditions Vulcan XC-72R, (ii) loadings added to pretreated C samples. In first set experiments, no was adsorbed on support. It shown that combined HNO3 NH3 gave higher activity than either or alone. second it HNO3/NH3-modified in...
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