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Title: Synthesis and Characterization of CO-and H2S-Tolerant Electrocatalysts for PEM Fuel Cell

Abstract

The present state-of-art Proton Exchange Membrane Fuel Cell (PEMFC) technology is based on platinum (Pt) as a catalyst for both the fuel (anode) and air (cathode) electrodes. This catalyst is highly active but susceptible to poisoning by CO, which may be present in the H{sub 2}-fuel used or may be introduced during the fuel processing. Presence of trace amount of CO and H{sub 2}S in the H{sub 2}-fuel poisons the anode irreversibly and decreases the performance of the PEMFCs. In an effort to reduce the Pt-loading and improve the PEMFC performance, we propose to synthesize a number of Pt-based binary, ternary, and quaternary electrocatalysts using Ru, Mo, Ir, Ni, and Co as a substitute for Pt. By fine-tuning the metal loadings and compositions of candidate electrocatalysts, we plan to minimize the cost and optimize the catalyst activity and performance in PEMFC. The feasibility of the novel electrocatalysts will be demonstrated in the proposed effort with gas phase CO and H{sub 2}S concentrations typical of those found in reformed fuel gas with coal/natural gas/methanol feedstocks. During this reporting period we synthesized four Pt-based electrocatalysts catalysts (Pt/Ru/Mo/Se, Pt/Ru/Mo/Ir, Pt/Ru/Mo/W, Ptr/Ru/Mo/Co) on Vulcan XG72 Carbon support by both conventional and ultra-sonication method. Frommore » current-voltage performance study, the catalytic activity was found in the increasing order of Pt/Ru/Mo/Ir > Pt/Ru/Mo/W > Pt/Ru/Mo/Co > Pt/Ru/MO/Se. Sonication method appears to provide better dispersion of catalysts on carbon support.« less

Authors:
Publication Date:
Research Org.:
North Carolina A&T State University
Sponsoring Org.:
USDOE
OSTI Identifier:
862410
DOE Contract Number:
FG26-02NT41673
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; AIR; ANODES; CARBON; CATALYSTS; ELECTROCATALYSTS; ELECTRODES; FUEL CELLS; FUEL GAS; PERFORMANCE; PLATINUM; POISONING; PROCESSING; PROTON EXCHANGE MEMBRANE FUEL CELLS; SYNTHESIS; TRACE AMOUNTS

Citation Formats

Shamsuddin Ilias. Synthesis and Characterization of CO-and H2S-Tolerant Electrocatalysts for PEM Fuel Cell. United States: N. p., 2005. Web. doi:10.2172/862410.
Shamsuddin Ilias. Synthesis and Characterization of CO-and H2S-Tolerant Electrocatalysts for PEM Fuel Cell. United States. doi:10.2172/862410.
Shamsuddin Ilias. Thu . "Synthesis and Characterization of CO-and H2S-Tolerant Electrocatalysts for PEM Fuel Cell". United States. doi:10.2172/862410. https://www.osti.gov/servlets/purl/862410.
@article{osti_862410,
title = {Synthesis and Characterization of CO-and H2S-Tolerant Electrocatalysts for PEM Fuel Cell},
author = {Shamsuddin Ilias},
abstractNote = {The present state-of-art Proton Exchange Membrane Fuel Cell (PEMFC) technology is based on platinum (Pt) as a catalyst for both the fuel (anode) and air (cathode) electrodes. This catalyst is highly active but susceptible to poisoning by CO, which may be present in the H{sub 2}-fuel used or may be introduced during the fuel processing. Presence of trace amount of CO and H{sub 2}S in the H{sub 2}-fuel poisons the anode irreversibly and decreases the performance of the PEMFCs. In an effort to reduce the Pt-loading and improve the PEMFC performance, we propose to synthesize a number of Pt-based binary, ternary, and quaternary electrocatalysts using Ru, Mo, Ir, Ni, and Co as a substitute for Pt. By fine-tuning the metal loadings and compositions of candidate electrocatalysts, we plan to minimize the cost and optimize the catalyst activity and performance in PEMFC. The feasibility of the novel electrocatalysts will be demonstrated in the proposed effort with gas phase CO and H{sub 2}S concentrations typical of those found in reformed fuel gas with coal/natural gas/methanol feedstocks. During this reporting period we synthesized four Pt-based electrocatalysts catalysts (Pt/Ru/Mo/Se, Pt/Ru/Mo/Ir, Pt/Ru/Mo/W, Ptr/Ru/Mo/Co) on Vulcan XG72 Carbon support by both conventional and ultra-sonication method. From current-voltage performance study, the catalytic activity was found in the increasing order of Pt/Ru/Mo/Ir > Pt/Ru/Mo/W > Pt/Ru/Mo/Co > Pt/Ru/MO/Se. Sonication method appears to provide better dispersion of catalysts on carbon support.},
doi = {10.2172/862410},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Dec 22 00:00:00 EST 2005},
month = {Thu Dec 22 00:00:00 EST 2005}
}

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