Impact of the Cathode Pt Loading on PEMFC Contamination by Several Airborne Contaminants
Proton exchange membrane fuel cells (PEMFCs) with 0.1 and 0.4 mg Pt cm(-2) cathode catalyst loadings were separately contaminated with seven organic species: Acetonitrile, acetylene, bromomethane, iso-propanol, methyl methacrylate, naphthalene, and propene. The lower catalyst loading led to larger c...
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Veröffentlicht in: | Molecules (Basel, Switzerland) Switzerland), 2020-02, Vol.25 (5), p.1060, Article 1060 |
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description | Proton exchange membrane fuel cells (PEMFCs) with 0.1 and 0.4 mg Pt cm(-2) cathode catalyst loadings were separately contaminated with seven organic species: Acetonitrile, acetylene, bromomethane, iso-propanol, methyl methacrylate, naphthalene, and propene. The lower catalyst loading led to larger cell voltage losses at the steady state. Three closely related electrical equivalent circuits were used to fit impedance spectra obtained before, during, and after contamination, which revealed that the cell voltage loss was due to higher kinetic and mass transfer resistances. A significant correlation was not found between the steady-state cell voltage loss and the sum of the kinetic and mass transfer resistance changes. Major increases in research program costs and efforts would be required to find a predictive correlation, which suggests a focus on contamination prevention and recovery measures rather than contamination mechanisms. |
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The lower catalyst loading led to larger cell voltage losses at the steady state. Three closely related electrical equivalent circuits were used to fit impedance spectra obtained before, during, and after contamination, which revealed that the cell voltage loss was due to higher kinetic and mass transfer resistances. A significant correlation was not found between the steady-state cell voltage loss and the sum of the kinetic and mass transfer resistance changes. 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The lower catalyst loading led to larger cell voltage losses at the steady state. Three closely related electrical equivalent circuits were used to fit impedance spectra obtained before, during, and after contamination, which revealed that the cell voltage loss was due to higher kinetic and mass transfer resistances. A significant correlation was not found between the steady-state cell voltage loss and the sum of the kinetic and mass transfer resistance changes. Major increases in research program costs and efforts would be required to find a predictive correlation, which suggests a focus on contamination prevention and recovery measures rather than contamination mechanisms.</description><subject>2-Propanol - chemistry</subject><subject>Acetonitriles - chemistry</subject><subject>Acetylene - chemistry</subject><subject>Alkenes - chemistry</subject><subject>BASIC BIOLOGICAL SCIENCES</subject><subject>Biochemistry & Molecular Biology</subject><subject>Bioelectric Energy Sources</subject><subject>Carbon - chemistry</subject><subject>Catalysis</subject><subject>catalyst loading</subject><subject>cathode</subject><subject>Chemistry</subject><subject>Chemistry, Multidisciplinary</subject><subject>contamination</subject><subject>durability</subject><subject>Electric Impedance</subject><subject>Electricity</subject><subject>Electrodes</subject><subject>Equipment Contamination</subject><subject>Hydrocarbons, Brominated - chemistry</subject><subject>INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY</subject><subject>Life Sciences & Biomedicine</subject><subject>Membranes, Artificial</subject><subject>Methylmethacrylate - chemistry</subject><subject>Naphthalenes - chemistry</subject><subject>Physical Sciences</subject><subject>Platinum - chemistry</subject><subject>proton exchange membrane fuel cells</subject><subject>Protons</subject><subject>Science & Technology</subject><issn>1420-3049</issn><issn>1420-3049</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>AOWDO</sourceid><sourceid>EIF</sourceid><sourceid>DOA</sourceid><recordid>eNqNkV9rFDEUxYMotq5-AF9k8FVWb_7O5EUoQ2sXViyo4FvIJHd2U2aTZSZb6bc3duza4otPuZz8zrkJh5DXFN5zruHDLg3oDgNOTIKkoOAJOaWCwZKD0E8fzCfkxTRdAzAqqHxOTjijDHTNT8mP1W5vXa5SX-UtVq3N2-SxusrVOlkf4qZKsbo6_3zRVm2K2e5CtDkUrbutvuINjnaozsLYpTHiXyLm6SV51tthwld_zgX5fnH-rb1crr98WrVn66UTmuUldaikbwB68JJ3HpnWvdWSOa1q7lzXsIbaBqQSHVLpXWN55zq0gnsE1fMFWc25Ptlrsx_Dzo63Jtlg7oQ0bowdc3ADGlbrvlECmOdO1Irqxoq6U0wx7WtZ1AX5OGftD90OvcOYy_8ehT6-iWFrNunG1LTWoFUJeDsHpCkHM7mQ0W1dihFdNoXRVNIC0RlyY5qmEfvjAgrmd6_mn16L583Dlx0d90UWoJmBn9ilvmzG6PCIAYBkmlGtyyR4G_JdiW06xFys7_7fyn8B4JjBTQ</recordid><startdate>20200227</startdate><enddate>20200227</enddate><creator>St-Pierre, Jean</creator><creator>Zhai, Yunfeng</creator><general>Mdpi</general><general>MDPI</general><general>MDPI AG</general><scope>AOWDO</scope><scope>BLEPL</scope><scope>DTL</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>OIOZB</scope><scope>OTOTI</scope><scope>5PM</scope><scope>DOA</scope><orcidid>https://orcid.org/0000-0001-5070-9681</orcidid></search><sort><creationdate>20200227</creationdate><title>Impact of the Cathode Pt Loading on PEMFC Contamination by Several Airborne Contaminants</title><author>St-Pierre, Jean ; Zhai, Yunfeng</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c492t-1ce65d800f0d53bde299fa952c9673ccb8281a80564be15dc8a3bcbea43de06f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>2-Propanol - chemistry</topic><topic>Acetonitriles - chemistry</topic><topic>Acetylene - chemistry</topic><topic>Alkenes - chemistry</topic><topic>BASIC BIOLOGICAL SCIENCES</topic><topic>Biochemistry & Molecular Biology</topic><topic>Bioelectric Energy Sources</topic><topic>Carbon - chemistry</topic><topic>Catalysis</topic><topic>catalyst loading</topic><topic>cathode</topic><topic>Chemistry</topic><topic>Chemistry, Multidisciplinary</topic><topic>contamination</topic><topic>durability</topic><topic>Electric Impedance</topic><topic>Electricity</topic><topic>Electrodes</topic><topic>Equipment Contamination</topic><topic>Hydrocarbons, Brominated - chemistry</topic><topic>INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY</topic><topic>Life Sciences & Biomedicine</topic><topic>Membranes, Artificial</topic><topic>Methylmethacrylate - chemistry</topic><topic>Naphthalenes - chemistry</topic><topic>Physical Sciences</topic><topic>Platinum - chemistry</topic><topic>proton exchange membrane fuel cells</topic><topic>Protons</topic><topic>Science & Technology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>St-Pierre, Jean</creatorcontrib><creatorcontrib>Zhai, Yunfeng</creatorcontrib><creatorcontrib>Univ. of Hawaii, Honolulu, HI (United States)</creatorcontrib><collection>Web of Science - Science Citation Index Expanded - 2020</collection><collection>Web of Science Core Collection</collection><collection>Science Citation Index Expanded</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>OSTI.GOV - Hybrid</collection><collection>OSTI.GOV</collection><collection>PubMed Central (Full Participant titles)</collection><collection>DOAJ Directory of Open Access Journals</collection><jtitle>Molecules (Basel, Switzerland)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>St-Pierre, Jean</au><au>Zhai, Yunfeng</au><aucorp>Univ. of Hawaii, Honolulu, HI (United States)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Impact of the Cathode Pt Loading on PEMFC Contamination by Several Airborne Contaminants</atitle><jtitle>Molecules (Basel, Switzerland)</jtitle><stitle>MOLECULES</stitle><addtitle>Molecules</addtitle><date>2020-02-27</date><risdate>2020</risdate><volume>25</volume><issue>5</issue><spage>1060</spage><pages>1060-</pages><artnum>1060</artnum><issn>1420-3049</issn><eissn>1420-3049</eissn><abstract>Proton exchange membrane fuel cells (PEMFCs) with 0.1 and 0.4 mg Pt cm(-2) cathode catalyst loadings were separately contaminated with seven organic species: Acetonitrile, acetylene, bromomethane, iso-propanol, methyl methacrylate, naphthalene, and propene. The lower catalyst loading led to larger cell voltage losses at the steady state. Three closely related electrical equivalent circuits were used to fit impedance spectra obtained before, during, and after contamination, which revealed that the cell voltage loss was due to higher kinetic and mass transfer resistances. A significant correlation was not found between the steady-state cell voltage loss and the sum of the kinetic and mass transfer resistance changes. Major increases in research program costs and efforts would be required to find a predictive correlation, which suggests a focus on contamination prevention and recovery measures rather than contamination mechanisms.</abstract><cop>BASEL</cop><pub>Mdpi</pub><pmid>32120973</pmid><doi>10.3390/molecules25051060</doi><tpages>15</tpages><orcidid>https://orcid.org/0000-0001-5070-9681</orcidid><oa>free_for_read</oa></addata></record> |
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subjects | 2-Propanol - chemistry Acetonitriles - chemistry Acetylene - chemistry Alkenes - chemistry BASIC BIOLOGICAL SCIENCES Biochemistry & Molecular Biology Bioelectric Energy Sources Carbon - chemistry Catalysis catalyst loading cathode Chemistry Chemistry, Multidisciplinary contamination durability Electric Impedance Electricity Electrodes Equipment Contamination Hydrocarbons, Brominated - chemistry INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY Life Sciences & Biomedicine Membranes, Artificial Methylmethacrylate - chemistry Naphthalenes - chemistry Physical Sciences Platinum - chemistry proton exchange membrane fuel cells Protons Science & Technology |
title | Impact of the Cathode Pt Loading on PEMFC Contamination by Several Airborne Contaminants |
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