High surface area synthesis, electrochemical activity, and stability of tungsten carbide supported Pt during oxygen reduction in proton exchange membrane fuel cells
The oxidation of carbon catalyst supports to carbon dioxide gas leads to degradation in catalyst performance over time in proton exchange membrane fuel cells (PEMFCs). The electrochemical stability of Pt supported on tungsten carbide has been evaluated on a carbon-based gas diffusion layer (GDL) at...
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| Veröffentlicht in: | Journal of power sources 2008-04, Vol.179 (1), p.50-59 |
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| creator | CHHINA, H CAMPBELL, S KESLER, O |
| description | The oxidation of carbon catalyst supports to carbon dioxide gas leads to degradation in catalyst performance over time in proton exchange membrane fuel cells (PEMFCs). The electrochemical stability of Pt supported on tungsten carbide has been evaluated on a carbon-based gas diffusion layer (GDL) at 80 [deg]C and compared to that of HiSpec 4000[TM] Pt/Vulcan XC-72R in 0.5 M H sub(2SO) sub(4). Due to other electrochemical processes occurring on the GDL, detailed studies were also performed on a gold mesh substrate. The oxygen reduction reaction (ORR) activity was measured both before and after accelerated oxidation cycles between +0.6 V and +1.8 V vs. RHE. Tafel plots show that the ORR activity remained high even after accelerated oxidation tests for Pt/tungsten carbide, while the ORR activity was extremely poor after accelerated oxidation tests for HiSpec 4000[TM]. In order to make high surface area tungsten carbide, three synthesis routes were investigated. Magnetron sputtering of tungsten on carbon was found to be the most promising route, but needs further optimization. |
| doi_str_mv | 10.1016/j.jpowsour.2007.12.105 |
| format | Article |
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The electrochemical stability of Pt supported on tungsten carbide has been evaluated on a carbon-based gas diffusion layer (GDL) at 80 [deg]C and compared to that of HiSpec 4000[TM] Pt/Vulcan XC-72R in 0.5 M H sub(2SO) sub(4). Due to other electrochemical processes occurring on the GDL, detailed studies were also performed on a gold mesh substrate. The oxygen reduction reaction (ORR) activity was measured both before and after accelerated oxidation cycles between +0.6 V and +1.8 V vs. RHE. Tafel plots show that the ORR activity remained high even after accelerated oxidation tests for Pt/tungsten carbide, while the ORR activity was extremely poor after accelerated oxidation tests for HiSpec 4000[TM]. In order to make high surface area tungsten carbide, three synthesis routes were investigated. 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The electrochemical stability of Pt supported on tungsten carbide has been evaluated on a carbon-based gas diffusion layer (GDL) at 80 [deg]C and compared to that of HiSpec 4000[TM] Pt/Vulcan XC-72R in 0.5 M H sub(2SO) sub(4). Due to other electrochemical processes occurring on the GDL, detailed studies were also performed on a gold mesh substrate. The oxygen reduction reaction (ORR) activity was measured both before and after accelerated oxidation cycles between +0.6 V and +1.8 V vs. RHE. Tafel plots show that the ORR activity remained high even after accelerated oxidation tests for Pt/tungsten carbide, while the ORR activity was extremely poor after accelerated oxidation tests for HiSpec 4000[TM]. In order to make high surface area tungsten carbide, three synthesis routes were investigated. Magnetron sputtering of tungsten on carbon was found to be the most promising route, but needs further optimization.</description><subject>Accelerated tests</subject><subject>Applied sciences</subject><subject>Carbon</subject><subject>Catalysts</subject><subject>Energy</subject><subject>Energy. Thermal use of fuels</subject><subject>Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc</subject><subject>Exact sciences and technology</subject><subject>Fuel cells</subject><subject>Oxidation</subject><subject>Oxidation tests</subject><subject>Platinum</subject><subject>Proton exchange membrane fuel cells</subject><subject>Reduction</subject><subject>Tungsten carbide</subject><issn>0378-7753</issn><issn>1873-2755</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2008</creationdate><recordtype>article</recordtype><recordid>eNp9kc2OFCEUhYnRxHb0FQwbo4uplp8GiqWZjM4kk-hC14SGW9V0qqAEypl-Hx9UOjO6dAXcfPfcwz0IvaVkSwmVH4_b45LuS1rzlhGitpS1uniGNrRXvGNKiOdoQ7jqO6UEf4lelXIkhFCqyAb9vgnjAZc1D9YBthksLqdYD1BCucQwgas5uQPMwdkJW1fDr1BPl9hGj0u1-zC1J04DrmscS4WInc374KFpLkvKFTz-VrFfc4gjTg-nsSEZ_NqUUsQh4iWn2m7w4A42joBnmPfZRsDDChN2ME3lNXox2KnAm6fzAv34fP396qa7-_rl9urTXee4prUDSp3YaeK8Z9BrPmjeS8lsT6W3XFLQez5wLdvHveS99V464Z0DqQTZKc0v0PtH3ebp5wqlmjmUs4NmJ63F9FoyppmWjfzwX5IqpaggmuwaKh9Rl1MpGQaz5DDbfDKUmHOA5mj-BmjOARrKWl20xndPM2xpyx_aUlwo_7oZYbwXhPI_I3ii2w</recordid><startdate>20080415</startdate><enddate>20080415</enddate><creator>CHHINA, H</creator><creator>CAMPBELL, S</creator><creator>KESLER, O</creator><general>Elsevier Sequoia</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>7SU</scope><scope>7TB</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>H8D</scope><scope>KR7</scope><scope>L7M</scope><scope>7ST</scope><scope>SOI</scope></search><sort><creationdate>20080415</creationdate><title>High surface area synthesis, electrochemical activity, and stability of tungsten carbide supported Pt during oxygen reduction in proton exchange membrane fuel cells</title><author>CHHINA, H ; CAMPBELL, S ; KESLER, O</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c391t-e11c5490cdd2e893f938662a816da361e9b3f396170d638add6c5dcce67504793</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2008</creationdate><topic>Accelerated tests</topic><topic>Applied sciences</topic><topic>Carbon</topic><topic>Catalysts</topic><topic>Energy</topic><topic>Energy. Thermal use of fuels</topic><topic>Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc</topic><topic>Exact sciences and technology</topic><topic>Fuel cells</topic><topic>Oxidation</topic><topic>Oxidation tests</topic><topic>Platinum</topic><topic>Proton exchange membrane fuel cells</topic><topic>Reduction</topic><topic>Tungsten carbide</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>CHHINA, H</creatorcontrib><creatorcontrib>CAMPBELL, S</creatorcontrib><creatorcontrib>KESLER, O</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Environmental Engineering Abstracts</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Environment Abstracts</collection><collection>Environment Abstracts</collection><jtitle>Journal of power sources</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>CHHINA, H</au><au>CAMPBELL, S</au><au>KESLER, O</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>High surface area synthesis, electrochemical activity, and stability of tungsten carbide supported Pt during oxygen reduction in proton exchange membrane fuel cells</atitle><jtitle>Journal of power sources</jtitle><date>2008-04-15</date><risdate>2008</risdate><volume>179</volume><issue>1</issue><spage>50</spage><epage>59</epage><pages>50-59</pages><issn>0378-7753</issn><eissn>1873-2755</eissn><coden>JPSODZ</coden><abstract>The oxidation of carbon catalyst supports to carbon dioxide gas leads to degradation in catalyst performance over time in proton exchange membrane fuel cells (PEMFCs). The electrochemical stability of Pt supported on tungsten carbide has been evaluated on a carbon-based gas diffusion layer (GDL) at 80 [deg]C and compared to that of HiSpec 4000[TM] Pt/Vulcan XC-72R in 0.5 M H sub(2SO) sub(4). Due to other electrochemical processes occurring on the GDL, detailed studies were also performed on a gold mesh substrate. The oxygen reduction reaction (ORR) activity was measured both before and after accelerated oxidation cycles between +0.6 V and +1.8 V vs. RHE. Tafel plots show that the ORR activity remained high even after accelerated oxidation tests for Pt/tungsten carbide, while the ORR activity was extremely poor after accelerated oxidation tests for HiSpec 4000[TM]. In order to make high surface area tungsten carbide, three synthesis routes were investigated. Magnetron sputtering of tungsten on carbon was found to be the most promising route, but needs further optimization.</abstract><cop>Lausanne</cop><pub>Elsevier Sequoia</pub><doi>10.1016/j.jpowsour.2007.12.105</doi><tpages>10</tpages></addata></record> |
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| identifier | ISSN: 0378-7753 |
| ispartof | Journal of power sources, 2008-04, Vol.179 (1), p.50-59 |
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| language | eng |
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| source | Elsevier ScienceDirect Journals |
| subjects | Accelerated tests Applied sciences Carbon Catalysts Energy Energy. Thermal use of fuels Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc Exact sciences and technology Fuel cells Oxidation Oxidation tests Platinum Proton exchange membrane fuel cells Reduction Tungsten carbide |
| title | High surface area synthesis, electrochemical activity, and stability of tungsten carbide supported Pt during oxygen reduction in proton exchange membrane fuel cells |
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