Effects of carbon supports on Pt distribution, ionomer coverage and cathode performance for polymer electrolyte fuel cells
We investigate the effects of the carbon supports on the Pt distribution, ionomer coverage and cathode performance of carbon-supported Pt catalysts, by using STEM observation, N2 adsorption analysis and electrochemical characterization. According to the STEM observation, the effective Pt surface are...
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| Veröffentlicht in: | Journal of power sources 2016-05, Vol.315, p.179-191 |
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| creator | Park, Young-Chul Tokiwa, Haruki Kakinuma, Katsuyoshi Watanabe, Masahiro Uchida, Makoto |
| description | We investigate the effects of the carbon supports on the Pt distribution, ionomer coverage and cathode performance of carbon-supported Pt catalysts, by using STEM observation, N2 adsorption analysis and electrochemical characterization. According to the STEM observation, the effective Pt surface area (S(e)Pt), which is determined by the location and size of the Pt particles on the supports, increases in the following order: c-Pt/CB |
| doi_str_mv | 10.1016/j.jpowsour.2016.02.091 |
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| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_1816067636</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><els_id>S0378775316301987</els_id><sourcerecordid>1816067636</sourcerecordid><originalsourceid>FETCH-LOGICAL-c496t-6eb54787470dd0820bd74f2969a68d8b5bfb64d07185cd2e2aea881faa6a4613</originalsourceid><addsrcrecordid>eNqFkE1PAyEQhonRxFr9C4ajB3eF_QB60zT1I2mih94JC4PSbJcVdmvqr5dN9exlmJm87wzzIHRNSU4JZXfbfNv7r-jHkBepzkmRkwU9QTMqeJkVvK5P0YyUXGSc1-U5uohxSwihlJMZ-l5ZC3qI2FusVWh8h-PY9z5MrQ6_Ddi4OATXjIPz3S1Owe8gYO33ENQ7YNWZZBw-vAHcQ7A-7FSnAacE9749TGJo04qQiiH1R2ixhraNl-jMqjbC1e87R5vH1Wb5nK1fn16WD-tMVws2ZAyauuKCV5wYQ0RBGsMrWyzYQjFhRFM3tmGVIZyKWpsCCgVKCGqVYqpitJyjm-PYPvjPEeIgdy5OH1Ad-DFKKigjjLOSJSk7SnXwMQawsg9up8JBUiIn1nIr_1jLibUkhUysk_H-aIR0x95BkFE7SBiMC-l0abz7b8QPL9CPDA</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>1816067636</pqid></control><display><type>article</type><title>Effects of carbon supports on Pt distribution, ionomer coverage and cathode performance for polymer electrolyte fuel cells</title><source>Elsevier ScienceDirect Journals</source><creator>Park, Young-Chul ; Tokiwa, Haruki ; Kakinuma, Katsuyoshi ; Watanabe, Masahiro ; Uchida, Makoto</creator><creatorcontrib>Park, Young-Chul ; Tokiwa, Haruki ; Kakinuma, Katsuyoshi ; Watanabe, Masahiro ; Uchida, Makoto</creatorcontrib><description><![CDATA[We investigate the effects of the carbon supports on the Pt distribution, ionomer coverage and cathode performance of carbon-supported Pt catalysts, by using STEM observation, N2 adsorption analysis and electrochemical characterization. According to the STEM observation, the effective Pt surface area (S(e)Pt), which is determined by the location and size of the Pt particles on the supports, increases in the following order: c-Pt/CB < c-Pt/GCB < n-Pt/AB800 < n-Pt/AB250. The N2 adsorption analyses show that the Pt particles observed in the interior of the CB and AB800-supported Pt catalysts during the STEM observation could be ascribed to the hollow structures inside the carbon supports, which decrease their effective Pt surface areas. The S(e)Pt values are in good agreement with the cell performance in the high current density region. In spite of the highest Pt utilization (UPt) value (>90%) and uniform ionomer coverage, the c-Pt/CB catalyst shows the lowest cell performance due to the lower S(e)Pt value. On the other hand, the n-Pt/AB250 catalyst, for which all of the Pt particles exist only on the exterior surface, is found to be the most attractive in order to generate the large current densities required by actual fuel cell operation.
[Display omitted]
•Effective Pt surface area was in the order: Pt/CB < Pt/GCB < Pt/AB800 < Pt/AB250.•Hollow structure of the CB and AB800 decreased the effective Pt surface area (S(e)Pt).•S(e)Pt values were in good agreement with the performance at high current densities.•This is due to improvement of the effective Pt surface area and ionomer distribution.•The AB-supported Pt catalysts had well-balanced supply paths for protons and oxygen.]]></description><identifier>ISSN: 0378-7753</identifier><identifier>EISSN: 1873-2755</identifier><identifier>DOI: 10.1016/j.jpowsour.2016.02.091</identifier><language>eng</language><publisher>Elsevier B.V</publisher><subject>Carbon ; Carbon-supported Pt catalysts ; Catalysis ; Catalysts ; Cathodes ; Effective Pt surface area ; Electrolytic cells ; Fuel cells ; Ionomer distribution ; Ionomers ; Platinum ; Polymer electrolyte fuel cells ; Pore structure</subject><ispartof>Journal of power sources, 2016-05, Vol.315, p.179-191</ispartof><rights>2016 The Authors</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c496t-6eb54787470dd0820bd74f2969a68d8b5bfb64d07185cd2e2aea881faa6a4613</citedby><cites>FETCH-LOGICAL-c496t-6eb54787470dd0820bd74f2969a68d8b5bfb64d07185cd2e2aea881faa6a4613</cites><orcidid>0000-0002-7847-3727</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0378775316301987$$EHTML$$P50$$Gelsevier$$Hfree_for_read</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids></links><search><creatorcontrib>Park, Young-Chul</creatorcontrib><creatorcontrib>Tokiwa, Haruki</creatorcontrib><creatorcontrib>Kakinuma, Katsuyoshi</creatorcontrib><creatorcontrib>Watanabe, Masahiro</creatorcontrib><creatorcontrib>Uchida, Makoto</creatorcontrib><title>Effects of carbon supports on Pt distribution, ionomer coverage and cathode performance for polymer electrolyte fuel cells</title><title>Journal of power sources</title><description><![CDATA[We investigate the effects of the carbon supports on the Pt distribution, ionomer coverage and cathode performance of carbon-supported Pt catalysts, by using STEM observation, N2 adsorption analysis and electrochemical characterization. According to the STEM observation, the effective Pt surface area (S(e)Pt), which is determined by the location and size of the Pt particles on the supports, increases in the following order: c-Pt/CB < c-Pt/GCB < n-Pt/AB800 < n-Pt/AB250. The N2 adsorption analyses show that the Pt particles observed in the interior of the CB and AB800-supported Pt catalysts during the STEM observation could be ascribed to the hollow structures inside the carbon supports, which decrease their effective Pt surface areas. The S(e)Pt values are in good agreement with the cell performance in the high current density region. In spite of the highest Pt utilization (UPt) value (>90%) and uniform ionomer coverage, the c-Pt/CB catalyst shows the lowest cell performance due to the lower S(e)Pt value. On the other hand, the n-Pt/AB250 catalyst, for which all of the Pt particles exist only on the exterior surface, is found to be the most attractive in order to generate the large current densities required by actual fuel cell operation.
[Display omitted]
•Effective Pt surface area was in the order: Pt/CB < Pt/GCB < Pt/AB800 < Pt/AB250.•Hollow structure of the CB and AB800 decreased the effective Pt surface area (S(e)Pt).•S(e)Pt values were in good agreement with the performance at high current densities.•This is due to improvement of the effective Pt surface area and ionomer distribution.•The AB-supported Pt catalysts had well-balanced supply paths for protons and oxygen.]]></description><subject>Carbon</subject><subject>Carbon-supported Pt catalysts</subject><subject>Catalysis</subject><subject>Catalysts</subject><subject>Cathodes</subject><subject>Effective Pt surface area</subject><subject>Electrolytic cells</subject><subject>Fuel cells</subject><subject>Ionomer distribution</subject><subject>Ionomers</subject><subject>Platinum</subject><subject>Polymer electrolyte fuel cells</subject><subject>Pore structure</subject><issn>0378-7753</issn><issn>1873-2755</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNqFkE1PAyEQhonRxFr9C4ajB3eF_QB60zT1I2mih94JC4PSbJcVdmvqr5dN9exlmJm87wzzIHRNSU4JZXfbfNv7r-jHkBepzkmRkwU9QTMqeJkVvK5P0YyUXGSc1-U5uohxSwihlJMZ-l5ZC3qI2FusVWh8h-PY9z5MrQ6_Ddi4OATXjIPz3S1Owe8gYO33ENQ7YNWZZBw-vAHcQ7A-7FSnAacE9749TGJo04qQiiH1R2ixhraNl-jMqjbC1e87R5vH1Wb5nK1fn16WD-tMVws2ZAyauuKCV5wYQ0RBGsMrWyzYQjFhRFM3tmGVIZyKWpsCCgVKCGqVYqpitJyjm-PYPvjPEeIgdy5OH1Ad-DFKKigjjLOSJSk7SnXwMQawsg9up8JBUiIn1nIr_1jLibUkhUysk_H-aIR0x95BkFE7SBiMC-l0abz7b8QPL9CPDA</recordid><startdate>20160531</startdate><enddate>20160531</enddate><creator>Park, Young-Chul</creator><creator>Tokiwa, Haruki</creator><creator>Kakinuma, Katsuyoshi</creator><creator>Watanabe, Masahiro</creator><creator>Uchida, Makoto</creator><general>Elsevier B.V</general><scope>6I.</scope><scope>AAFTH</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>7TB</scope><scope>8FD</scope><scope>FR3</scope><scope>KR7</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0002-7847-3727</orcidid></search><sort><creationdate>20160531</creationdate><title>Effects of carbon supports on Pt distribution, ionomer coverage and cathode performance for polymer electrolyte fuel cells</title><author>Park, Young-Chul ; Tokiwa, Haruki ; Kakinuma, Katsuyoshi ; Watanabe, Masahiro ; Uchida, Makoto</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c496t-6eb54787470dd0820bd74f2969a68d8b5bfb64d07185cd2e2aea881faa6a4613</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Carbon</topic><topic>Carbon-supported Pt catalysts</topic><topic>Catalysis</topic><topic>Catalysts</topic><topic>Cathodes</topic><topic>Effective Pt surface area</topic><topic>Electrolytic cells</topic><topic>Fuel cells</topic><topic>Ionomer distribution</topic><topic>Ionomers</topic><topic>Platinum</topic><topic>Polymer electrolyte fuel cells</topic><topic>Pore structure</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Park, Young-Chul</creatorcontrib><creatorcontrib>Tokiwa, Haruki</creatorcontrib><creatorcontrib>Kakinuma, Katsuyoshi</creatorcontrib><creatorcontrib>Watanabe, Masahiro</creatorcontrib><creatorcontrib>Uchida, Makoto</creatorcontrib><collection>ScienceDirect Open Access Titles</collection><collection>Elsevier:ScienceDirect:Open Access</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering 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>Park, Young-Chul</au><au>Tokiwa, Haruki</au><au>Kakinuma, Katsuyoshi</au><au>Watanabe, Masahiro</au><au>Uchida, Makoto</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effects of carbon supports on Pt distribution, ionomer coverage and cathode performance for polymer electrolyte fuel cells</atitle><jtitle>Journal of power sources</jtitle><date>2016-05-31</date><risdate>2016</risdate><volume>315</volume><spage>179</spage><epage>191</epage><pages>179-191</pages><issn>0378-7753</issn><eissn>1873-2755</eissn><abstract><![CDATA[We investigate the effects of the carbon supports on the Pt distribution, ionomer coverage and cathode performance of carbon-supported Pt catalysts, by using STEM observation, N2 adsorption analysis and electrochemical characterization. According to the STEM observation, the effective Pt surface area (S(e)Pt), which is determined by the location and size of the Pt particles on the supports, increases in the following order: c-Pt/CB < c-Pt/GCB < n-Pt/AB800 < n-Pt/AB250. The N2 adsorption analyses show that the Pt particles observed in the interior of the CB and AB800-supported Pt catalysts during the STEM observation could be ascribed to the hollow structures inside the carbon supports, which decrease their effective Pt surface areas. The S(e)Pt values are in good agreement with the cell performance in the high current density region. In spite of the highest Pt utilization (UPt) value (>90%) and uniform ionomer coverage, the c-Pt/CB catalyst shows the lowest cell performance due to the lower S(e)Pt value. On the other hand, the n-Pt/AB250 catalyst, for which all of the Pt particles exist only on the exterior surface, is found to be the most attractive in order to generate the large current densities required by actual fuel cell operation.
[Display omitted]
•Effective Pt surface area was in the order: Pt/CB < Pt/GCB < Pt/AB800 < Pt/AB250.•Hollow structure of the CB and AB800 decreased the effective Pt surface area (S(e)Pt).•S(e)Pt values were in good agreement with the performance at high current densities.•This is due to improvement of the effective Pt surface area and ionomer distribution.•The AB-supported Pt catalysts had well-balanced supply paths for protons and oxygen.]]></abstract><pub>Elsevier B.V</pub><doi>10.1016/j.jpowsour.2016.02.091</doi><tpages>13</tpages><orcidid>https://orcid.org/0000-0002-7847-3727</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Carbon Carbon-supported Pt catalysts Catalysis Catalysts Cathodes Effective Pt surface area Electrolytic cells Fuel cells Ionomer distribution Ionomers Platinum Polymer electrolyte fuel cells Pore structure |
| title | Effects of carbon supports on Pt distribution, ionomer coverage and cathode performance for polymer electrolyte fuel cells |
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