10.1149\/1.1391761<\/a><\/p>\nAuthors:<\/h4>\n
Thomas J. Schmidt, Hubert A. Gasteiger, R. J\u00fcrgen Behm<\/p>\n
Abstract:<\/h4>\n
We examine the electrocatalytic properties of a Pt\/Vulcan carbon catalyst toward the electro\u2010oxidation of CO and mixtures under proton exchange membrane fuel cell (PEMFC) relevant conditions (60 to 80\u00b0C, continuous reactant flow), employing rotating disk electrode (RDE) measurements. We demonstrate that our recently introduced thin\u2010film RDE technique can be applied to predict the performance of real fuel cell anodes operating on CO\u2010contaminated . The method involves attaching the catalyst particles to a glassy carbon RDE via a thin Nafion film. The thin\u2010film RDE technique opens the possibility for the mass\u2010transport\u2010free determination of the electrode kinetics at 100% catalyst utilization. At identical mass\u2010specific current densities, the overpotentials for oxidation measured with the thin\u2010film RDE technique are in excellent agreement with performance data from PEMFC anodes. The kinetics of pure CO oxidation were investigated with mixtures, revealing that the CO oxidation activity increases with decreasing CO partial pressure (negative reaction order). The observed ignition potential for CO oxidation was the same for both the and the mixtures. Two oxidation mechanisms in the presence of CO can be distinguished: (i) a high Tafel slope region at low overpotentials, where oxidation occurs in vacancies of the CO adlayer; and (ii) a low Tafel slope region at high overpotentials where and CO oxidation occur simultaneously. \u00a9 1999 The Electrochemical Society. All rights reserved.<\/p>\n","protected":false},"excerpt":{"rendered":"
DOI: 10.1149\/1.1391761 Authors: Thomas J. Schmidt, Hubert A. Gasteiger, R. J\u00fcrgen Behm Abstract: We examine the electrocatalytic properties of a Pt\/Vulcan carbon catalyst toward the electro\u2010oxidation of CO and mixtures under proton exchange membrane fuel cell (PEMFC) relevant conditions (60 to 80\u00b0C, continuous reactant flow), employing rotating disk electrode (RDE) measurements. We demonstrate that our […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-1116","post","type-post","status-publish","format-standard","hentry","category-blurev-rde-rrde"],"_links":{"self":[{"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=\/wp\/v2\/posts\/1116","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1116"}],"version-history":[{"count":0,"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=\/wp\/v2\/posts\/1116\/revisions"}],"wp:attachment":[{"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1116"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1116"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1116"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}