Highly active and durable chemically ordered Pt-Fe-Co intermetallics as cathode catalysts of membrane-electrode assemblies in polymer electrolyte fuel cells
A cathode catalyst with enhanced activity for the oxygen reduction reaction and high durability is greatly required in polymer electrolyte fuel cells (PEFCs). We report that chemically ordered intermetallics, Pt sub(2)FeCo/C with L1 sub(0) ordered structure and Pt sub(6)FeCo/C with L1 sub(2) ordered...
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| Veröffentlicht in: | Journal of power sources 2014-12, Vol.271, p.346-353 |
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| creator | TAMAKI, Takanori MINAGAWA, Atsuhiko ARUMUGAM, Balamurugan KAKADE, Bhalchandra A YAMAGUCHI, Takeo |
| description | A cathode catalyst with enhanced activity for the oxygen reduction reaction and high durability is greatly required in polymer electrolyte fuel cells (PEFCs). We report that chemically ordered intermetallics, Pt sub(2)FeCo/C with L1 sub(0) ordered structure and Pt sub(6)FeCo/C with L1 sub(2) ordered structure, achieve both higher activity in solution and higher durability as the cathode catalyst of a membrane-electrode assembly (MEA) under actual PEFC operating conditions, compared with a commercial Pt/C. The mass activity of Pt sub(2)FeCo/C is about twice as high as that of a commercial Pt/C, and Pt sub(6)FeCo/C has a slightly higher mass activity than a commercial Pt/C in solution. These intermetallics were evaluated for durability as the cathodes of MEAs. During the load cycle durability test, the electrochemical surface area (ECSA) of Pt sub(2)FeCo/C is retained, while that of Pt sub(6)FeCo/C decreases, although less than a commercial Pt/C. The retention of ECSA is consistent with smaller changes in the particle size, observed with transmission electron microscopy, of the intermetallics than of a commercial Pt/C. X-ray diffraction patterns after the durability test show that while some part of ordered intermetallics is transformed into pure Pt, the chemically ordered structure of Pt sub(2)FeCo/C is largely retained. Highly active and durable ordered intermetallics are oromisinz as cathode catalvsts of PEFCs. |
| doi_str_mv | 10.1016/j.jpowsour.2014.08.005 |
| format | Article |
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We report that chemically ordered intermetallics, Pt sub(2)FeCo/C with L1 sub(0) ordered structure and Pt sub(6)FeCo/C with L1 sub(2) ordered structure, achieve both higher activity in solution and higher durability as the cathode catalyst of a membrane-electrode assembly (MEA) under actual PEFC operating conditions, compared with a commercial Pt/C. The mass activity of Pt sub(2)FeCo/C is about twice as high as that of a commercial Pt/C, and Pt sub(6)FeCo/C has a slightly higher mass activity than a commercial Pt/C in solution. These intermetallics were evaluated for durability as the cathodes of MEAs. During the load cycle durability test, the electrochemical surface area (ECSA) of Pt sub(2)FeCo/C is retained, while that of Pt sub(6)FeCo/C decreases, although less than a commercial Pt/C. The retention of ECSA is consistent with smaller changes in the particle size, observed with transmission electron microscopy, of the intermetallics than of a commercial Pt/C. X-ray diffraction patterns after the durability test show that while some part of ordered intermetallics is transformed into pure Pt, the chemically ordered structure of Pt sub(2)FeCo/C is largely retained. Highly active and durable ordered intermetallics are oromisinz as cathode catalvsts of PEFCs.</description><identifier>ISSN: 0378-7753</identifier><identifier>EISSN: 1873-2755</identifier><identifier>DOI: 10.1016/j.jpowsour.2014.08.005</identifier><identifier>CODEN: JPSODZ</identifier><language>eng</language><publisher>Amsterdam: Elsevier</publisher><subject>Applied sciences ; Catalysis ; Catalysts ; Cathodes ; Direct energy conversion and energy accumulation ; Durability ; Electrical engineering. Electrical power engineering ; Electrical power engineering ; Electrochemical conversion: primary and secondary batteries, fuel cells ; Electrolytes ; Energy ; Energy. 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We report that chemically ordered intermetallics, Pt sub(2)FeCo/C with L1 sub(0) ordered structure and Pt sub(6)FeCo/C with L1 sub(2) ordered structure, achieve both higher activity in solution and higher durability as the cathode catalyst of a membrane-electrode assembly (MEA) under actual PEFC operating conditions, compared with a commercial Pt/C. The mass activity of Pt sub(2)FeCo/C is about twice as high as that of a commercial Pt/C, and Pt sub(6)FeCo/C has a slightly higher mass activity than a commercial Pt/C in solution. These intermetallics were evaluated for durability as the cathodes of MEAs. During the load cycle durability test, the electrochemical surface area (ECSA) of Pt sub(2)FeCo/C is retained, while that of Pt sub(6)FeCo/C decreases, although less than a commercial Pt/C. The retention of ECSA is consistent with smaller changes in the particle size, observed with transmission electron microscopy, of the intermetallics than of a commercial Pt/C. X-ray diffraction patterns after the durability test show that while some part of ordered intermetallics is transformed into pure Pt, the chemically ordered structure of Pt sub(2)FeCo/C is largely retained. Highly active and durable ordered intermetallics are oromisinz as cathode catalvsts of PEFCs.</description><subject>Applied sciences</subject><subject>Catalysis</subject><subject>Catalysts</subject><subject>Cathodes</subject><subject>Direct energy conversion and energy accumulation</subject><subject>Durability</subject><subject>Electrical engineering. Electrical power engineering</subject><subject>Electrical power engineering</subject><subject>Electrochemical conversion: primary and secondary batteries, fuel cells</subject><subject>Electrolytes</subject><subject>Energy</subject><subject>Energy. 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Electrical power engineering</topic><topic>Electrical power engineering</topic><topic>Electrochemical conversion: primary and secondary batteries, fuel cells</topic><topic>Electrolytes</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>Intermetallics</topic><topic>Materials</topic><topic>Platinum</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>TAMAKI, Takanori</creatorcontrib><creatorcontrib>MINAGAWA, Atsuhiko</creatorcontrib><creatorcontrib>ARUMUGAM, Balamurugan</creatorcontrib><creatorcontrib>KAKADE, Bhalchandra A</creatorcontrib><creatorcontrib>YAMAGUCHI, Takeo</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Materials Research Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of power sources</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>TAMAKI, Takanori</au><au>MINAGAWA, Atsuhiko</au><au>ARUMUGAM, Balamurugan</au><au>KAKADE, Bhalchandra A</au><au>YAMAGUCHI, Takeo</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Highly active and durable chemically ordered Pt-Fe-Co intermetallics as cathode catalysts of membrane-electrode assemblies in polymer electrolyte fuel cells</atitle><jtitle>Journal of power sources</jtitle><date>2014-12-20</date><risdate>2014</risdate><volume>271</volume><spage>346</spage><epage>353</epage><pages>346-353</pages><issn>0378-7753</issn><eissn>1873-2755</eissn><coden>JPSODZ</coden><abstract>A cathode catalyst with enhanced activity for the oxygen reduction reaction and high durability is greatly required in polymer electrolyte fuel cells (PEFCs). We report that chemically ordered intermetallics, Pt sub(2)FeCo/C with L1 sub(0) ordered structure and Pt sub(6)FeCo/C with L1 sub(2) ordered structure, achieve both higher activity in solution and higher durability as the cathode catalyst of a membrane-electrode assembly (MEA) under actual PEFC operating conditions, compared with a commercial Pt/C. The mass activity of Pt sub(2)FeCo/C is about twice as high as that of a commercial Pt/C, and Pt sub(6)FeCo/C has a slightly higher mass activity than a commercial Pt/C in solution. These intermetallics were evaluated for durability as the cathodes of MEAs. During the load cycle durability test, the electrochemical surface area (ECSA) of Pt sub(2)FeCo/C is retained, while that of Pt sub(6)FeCo/C decreases, although less than a commercial Pt/C. The retention of ECSA is consistent with smaller changes in the particle size, observed with transmission electron microscopy, of the intermetallics than of a commercial Pt/C. X-ray diffraction patterns after the durability test show that while some part of ordered intermetallics is transformed into pure Pt, the chemically ordered structure of Pt sub(2)FeCo/C is largely retained. Highly active and durable ordered intermetallics are oromisinz as cathode catalvsts of PEFCs.</abstract><cop>Amsterdam</cop><pub>Elsevier</pub><doi>10.1016/j.jpowsour.2014.08.005</doi><tpages>8</tpages></addata></record> |
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| subjects | Applied sciences Catalysis Catalysts Cathodes Direct energy conversion and energy accumulation Durability Electrical engineering. Electrical power engineering Electrical power engineering Electrochemical conversion: primary and secondary batteries, fuel cells Electrolytes Energy Energy. Thermal use of fuels Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc Exact sciences and technology Fuel cells Intermetallics Materials Platinum |
| title | Highly active and durable chemically ordered Pt-Fe-Co intermetallics as cathode catalysts of membrane-electrode assemblies in polymer electrolyte fuel cells |
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