1. Главная
  2. Ресурсы
  3. Библиотечный поиск
Enhancement of theElectroreduction ofOxygen on Pt Alloyswith Fe, Ni, and Co Takako TodaHiroshi IgarashiHiroyuki Uchida1999 год

Enhancement of the Electroreduction of Oxygen on Pt Alloys with Fe, Ni, and Co
статья из журнала

Страница публикацииПубликация в OpenAlex
Аннотация: Electrocatalytic activity of Pt alloys with Ni, Co, and Fe, formed by sputtering, was investigated with regard to the oxygen reduction reaction (ORR) in perchloric acid solution. Hydrodynamic voltammograms with rotated electrodes were used to measure the electrocatalytic activity. Maximum activity was observed at ca. 30, 40, and 50% content of Ni, Co, and Fe, respectively, by which 10, 15, and 20 times larger kinetic current densities than that of pure Pt were attained. X‐ray photoelectron spectroscopy analysis of the surfaces after the reaction indicated that the active surfaces were covered by a few monolayers of Pt. We present an enhancing mechanism for the ORR based on an increased d‐electron vacancy of the thin Pt surface layer caused by underlying alloy. Results of this work contribute in development of new active cathode catalysts for fuel cells used as power sources of electric vehicles, etc. © 1999 The Electrochemical Society. All rights reserved.
Год издания: 1999
Авторы: Takako Toda, Hiroshi Igarashi, Hiroyuki Uchida, Masahiro Watanabe
Издательство: Institute of Physics
Источник: Journal of The Electrochemical Society
Ключевые слова: Electrocatalysts for Energy Conversion, Electrochemical Analysis and Applications, Fuel Cells and Related Materials