Synthesis and Characterization of CO- and H2S-Tolerant Electrocatalysts for PEM Fuel Cell
- North Carolina A&T State University
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 several tri-metallic electrocatalysts catalysts (Pt/Ru/Mo, Pt/Ru/Ir, Pt/Ru/W, Ptr/Ru/Co, and Pt/Ru/Se on Vulcan XG72 Carbon) by ultrasonication method. These catalysts were tested in MEAs for CO tolerance at 20 and 100 ppm CO concentrations. From Galvonstatic study the catalytic activity was found in the order of: Pt/Ru/Mo/C > Pt/Ru/Ir/C > Pt/Ru/W/C > Ptr/Ru/Co/C > and Pt/Ru/Se. The catalysts performed very well at 20 ppm CO but at 100 ppm CO performance dropped significantly.
- Research Organization:
- North Carolina A&T State University
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FG26-02NT41673
- OSTI ID:
- 881863
- Country of Publication:
- United States
- Language:
- English
Similar Records
SYNTHESIS AND CHARACTERIZATION OF CO- AND H{sub 2}S-TOLERANT ELECTROCATALYSTS FOR PEM FUEL CELL
Synthesis and Characterization of CO-and H2S-Tolerant Electrocatalysts for PEM Fuel Cell
Synthesis and Characterization of CO- and H2S-Tolerant Electrocatalysts for PEM Fuel Cell
Technical Report
·
Tue Apr 05 00:00:00 EDT 2005
·
OSTI ID:838714
Synthesis and Characterization of CO-and H2S-Tolerant Electrocatalysts for PEM Fuel Cell
Technical Report
·
Wed Dec 21 23:00:00 EST 2005
·
OSTI ID:862410
Synthesis and Characterization of CO- and H2S-Tolerant Electrocatalysts for PEM Fuel Cell
Technical Report
·
Thu May 18 00:00:00 EDT 2006
·
OSTI ID:888875