SYNTHESIS AND CHARACTERIZATION OF CO-AND H2S-TOLERANT ELECTROCATALYSTS FOR PEM FUEL CELL

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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, ... continued below

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10 pages

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Ilias, Shamsuddin March 31, 2004.

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Description

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 several bi-metallic electrocatalysts were synthesized and tested in MEAs. From Galvonstatic study the catalytic activity was found in the order of: Pt/Ru/C > Pt/Mo/C > Pt/Ir/C > Pt/Ni/C > Pt/Cr/C. Work in progress to further study these catalysts for CO-tolerance in PEMFC and identify potential candidate metals for synthesis of trimetallic electrocatalysts.

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10 pages

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OSTI as DE00825778

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  • Other Information: PBD: 31 Mar 2004

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  • Report No.: NONE
  • Grant Number: FG26-02NT41673
  • DOI: 10.2172/825778 | External Link
  • Office of Scientific & Technical Information Report Number: 825778
  • Archival Resource Key: ark:/67531/metadc786797

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  • March 31, 2004

Added to The UNT Digital Library

  • Dec. 3, 2015, 9:30 a.m.

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  • May 6, 2016, 1:56 p.m.

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Ilias, Shamsuddin. SYNTHESIS AND CHARACTERIZATION OF CO-AND H2S-TOLERANT ELECTROCATALYSTS FOR PEM FUEL CELL, report, March 31, 2004; North Carolina. (digital.library.unt.edu/ark:/67531/metadc786797/: accessed September 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.