Yoo, Jong Suk Kim, Hyun Tae Joh, Han-Ik Kim, Heeyeon Moon, Sang Heup 2024-01-20T17:34:36Z 2024-01-20T17:34:36Z 2021-09-02 2011-02 0360-3199 https://pubs.kist.re.kr/handle/201004/130700 A CO-tolerant PtRuxSny/C electrocatalyst, with an optimal x/y ratio of 0.8/0.2, was prepared by selectively depositing Sn on the metallic surface of PtRu0.8/C for use as the anode in a polymer electrolyte membrane fuel cell. The CO tolerance of the catalyst was greater when Sn was added by chemical vapor deposition (CVD) than by a conventional precipitation method because most of the Sn added by CVD was located in the vicinity of Pt and Ru surfaces, on which CO molecules were strongly adsorbed. Accordingly, the bi-functional mechanism of CO oxidation, which involved the migration of oxygenated species from the Sn to the adsorbed CO, was expected to be promoted to greater extents in the catalysts prepared by Sn-CVD than those prepared by Sn-precipitation. On the other hand, the ligand-effect mechanism of CO oxidation, which was facilitated by the Pt-Ru alloy formation, was not much affected by the added Sn because the Pt-Ru alloy remained unchanged, particularly when y <= 0.2. Among PtRuxSny/C catalysts prepared by Sn-CVD, one prepared by partially substituting Sn for Ru in the PtRu1.0/C catalyst, e.g., PtRu0.8Sn0.2/C, showed higher CO tolerance than one prepared by simply adding Sn to the PtRu1.0/C catalyst, e.g., PtRu1.0Sn0.2/C, which demonstrated the importance of an optimum x/y ratio in the design of the ternary PtRuxSny/C catalysts. Crown Copyright (C) 2010 Published by Elsevier Ltd on behalf of Professor T. Nejat Veziroglu. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD TEMPERATURE FUEL-CELL ANODE ELECTROCATALYSTS CARBON-MONOXIDE CATALYSTS OXIDATION METHANOL ELECTROOXIDATION HYDROGEN PLATINUM PTRU/C Preparation of a CO-tolerant PtRuxSny/C electrocatalyst with an optimal Ru/Sn ratio by selective Sn-deposition on the surfaces of Pt and Ru Article 10.1016/j.ijhydene.2010.11.061 1 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.36, no.3, pp.1930 - 1938 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 36 3 1930 1938 scie scopus 000288825800004 2-s2.0-79551635440 Chemistry, Physical Electrochemistry Energy & Fuels Chemistry Electrochemistry Energy & Fuels Article TEMPERATURE FUEL-CELL ANODE ELECTROCATALYSTS CARBON-MONOXIDE CATALYSTS OXIDATION METHANOL ELECTROOXIDATION HYDROGEN PLATINUM PTRU/C CVD CO tolerance Fuel cell Pt Ru Sn