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Observation of 18O/16O isotope effects at the cathode of a polymer electrolyte membrane fuel cell
18 O/ 16 O isotope effects were observed at the cathode of a polymer electrolyte membrane fuel cell at 25 and 35°C. Results of experiments in which the 18 O/ 16 O isotope ratios of the oxygen gases supplied to and exhausted from the cell were measured revealed that the lighter isotope 16 O reacted m...
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| Published in: | Isotopes in environmental and health studies 2019-05, Vol.55 (2), p.199-210 |
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| Main Authors: | , , , |
| Format: | Article |
| Language: | English |
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| container_end_page | 210 |
| container_issue | 2 |
| container_start_page | 199 |
| container_title | Isotopes in environmental and health studies |
| container_volume | 55 |
| creator | Oi, Takao Seki, Kaishu Kikawada, Yoshikazu Yanase, Satoshi |
| description | 18
O/
16
O isotope effects were observed at the cathode of a polymer electrolyte membrane fuel cell at 25 and 35°C. Results of experiments in which the
18
O/
16
O isotope ratios of the oxygen gases supplied to and exhausted from the cell were measured revealed that the lighter isotope
16
O reacted more preferentially to form water molecules at the cathode than the heavier one,
18
O. The value of the oxygen isotope separation factor, S
1
, defined as the ratio of the
18
O/
16
O isotope ratios of the oxygen gases supplied to and exhausted from the cell, ranged from 1.0030 to 1.0139, and tended to decrease with decreasing rate of oxygen utilisation (θ) and with increasing flow rate of the feed oxygen gas (D
F
). The value of another separation factor, S
2
, defined as the ratio of the
18
O/
16
O isotope ratios of the exhausted oxygen gas and oxygen having reacted to form water molecules at the cathode, ranged from 1.0049 to 1.0304. The S
2
value was much less affected by the change in θ and D
F
than the S
1
value with the majority of the S
2
value being in the range of 1.0240-1.0304. |
| doi_str_mv | 10.1080/10256016.2019.1575826 |
| format | article |
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O/
16
O isotope effects were observed at the cathode of a polymer electrolyte membrane fuel cell at 25 and 35°C. Results of experiments in which the
18
O/
16
O isotope ratios of the oxygen gases supplied to and exhausted from the cell were measured revealed that the lighter isotope
16
O reacted more preferentially to form water molecules at the cathode than the heavier one,
18
O. The value of the oxygen isotope separation factor, S
1
, defined as the ratio of the
18
O/
16
O isotope ratios of the oxygen gases supplied to and exhausted from the cell, ranged from 1.0030 to 1.0139, and tended to decrease with decreasing rate of oxygen utilisation (θ) and with increasing flow rate of the feed oxygen gas (D
F
). The value of another separation factor, S
2
, defined as the ratio of the
18
O/
16
O isotope ratios of the exhausted oxygen gas and oxygen having reacted to form water molecules at the cathode, ranged from 1.0049 to 1.0304. The S
2
value was much less affected by the change in θ and D
F
than the S
1
value with the majority of the S
2
value being in the range of 1.0240-1.0304.</description><identifier>ISSN: 1025-6016</identifier><identifier>EISSN: 1477-2639</identifier><identifier>DOI: 10.1080/10256016.2019.1575826</identifier><language>eng</language><publisher>Amsterdam: Taylor & Francis</publisher><subject>Cathodes ; Electrolytes ; Equilibrium isotope effects ; Flow rates ; Flow velocity ; Fuel cells ; Fuel technology ; Gases ; Isotope ratios ; Isotope separation ; Isotopes ; kinetic isotope effects ; Oxygen ; Oxygen isotopes ; oxygen-18 ; Polymers ; Proton exchange membrane fuel cells ; separation factor ; Water chemistry ; water electrolysis</subject><ispartof>Isotopes in environmental and health studies, 2019-05, Vol.55 (2), p.199-210</ispartof><rights>2019 Informa UK Limited, trading as Taylor & Francis Group 2019</rights><rights>2019 Informa UK Limited, trading as Taylor & Francis Group</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids></links><search><creatorcontrib>Oi, Takao</creatorcontrib><creatorcontrib>Seki, Kaishu</creatorcontrib><creatorcontrib>Kikawada, Yoshikazu</creatorcontrib><creatorcontrib>Yanase, Satoshi</creatorcontrib><title>Observation of 18O/16O isotope effects at the cathode of a polymer electrolyte membrane fuel cell</title><title>Isotopes in environmental and health studies</title><description>18
O/
16
O isotope effects were observed at the cathode of a polymer electrolyte membrane fuel cell at 25 and 35°C. Results of experiments in which the
18
O/
16
O isotope ratios of the oxygen gases supplied to and exhausted from the cell were measured revealed that the lighter isotope
16
O reacted more preferentially to form water molecules at the cathode than the heavier one,
18
O. The value of the oxygen isotope separation factor, S
1
, defined as the ratio of the
18
O/
16
O isotope ratios of the oxygen gases supplied to and exhausted from the cell, ranged from 1.0030 to 1.0139, and tended to decrease with decreasing rate of oxygen utilisation (θ) and with increasing flow rate of the feed oxygen gas (D
F
). The value of another separation factor, S
2
, defined as the ratio of the
18
O/
16
O isotope ratios of the exhausted oxygen gas and oxygen having reacted to form water molecules at the cathode, ranged from 1.0049 to 1.0304. The S
2
value was much less affected by the change in θ and D
F
than the S
1
value with the majority of the S
2
value being in the range of 1.0240-1.0304.</description><subject>Cathodes</subject><subject>Electrolytes</subject><subject>Equilibrium isotope effects</subject><subject>Flow rates</subject><subject>Flow velocity</subject><subject>Fuel cells</subject><subject>Fuel technology</subject><subject>Gases</subject><subject>Isotope ratios</subject><subject>Isotope separation</subject><subject>Isotopes</subject><subject>kinetic isotope effects</subject><subject>Oxygen</subject><subject>Oxygen isotopes</subject><subject>oxygen-18</subject><subject>Polymers</subject><subject>Proton exchange membrane fuel cells</subject><subject>separation factor</subject><subject>Water chemistry</subject><subject>water electrolysis</subject><issn>1025-6016</issn><issn>1477-2639</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNpd0V1LwzAUBuAgCs7pTxAC3njTLR9Nm9wpwy8Y9EavS5qesI52mUmq7N-bunnjVU7g4fAeXoRuKVlQIsmSEiYKQosFI1QtqCiFZMUZmtG8LDNWcHWe5mSyCV2iqxC2hFAulJwhXTUB_JeOndthZzGV1ZIWFe6Ci24PGKwFEwPWEccNYKPjxrUwSY33rj8M4DH0ifj0iYAHGBqvd4DtCD020PfX6MLqPsDN6Z2jj-en99Vrtq5e3laP66xjhMdMt5YLoQmHhkupc6WlAjBpKlgJwirNTEEaaRRXbamJMHkjqOXGtCyFlHyO7o979959jhBiPXRhCpDSuDHUjKpSyjJnKtG7f3TrRr9L6X4VE7QUNKmHo-p21vlBfzvft3XUh955m240Xag5JfXUQf3XQT11UJ864D8ilnoA</recordid><startdate>20190501</startdate><enddate>20190501</enddate><creator>Oi, Takao</creator><creator>Seki, Kaishu</creator><creator>Kikawada, Yoshikazu</creator><creator>Yanase, Satoshi</creator><general>Taylor & Francis</general><general>Taylor & Francis Ltd</general><scope>7ST</scope><scope>C1K</scope><scope>SOI</scope><scope>7X8</scope></search><sort><creationdate>20190501</creationdate><title>Observation of 18O/16O isotope effects at the cathode of a polymer electrolyte membrane fuel cell</title><author>Oi, Takao ; Seki, Kaishu ; Kikawada, Yoshikazu ; Yanase, Satoshi</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-i203t-adf355a03eb388a49a89eec8a4627e5f9a2c60b8c939d7a05c4b51f3ccd2eff83</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Cathodes</topic><topic>Electrolytes</topic><topic>Equilibrium isotope effects</topic><topic>Flow rates</topic><topic>Flow velocity</topic><topic>Fuel cells</topic><topic>Fuel technology</topic><topic>Gases</topic><topic>Isotope ratios</topic><topic>Isotope separation</topic><topic>Isotopes</topic><topic>kinetic isotope effects</topic><topic>Oxygen</topic><topic>Oxygen isotopes</topic><topic>oxygen-18</topic><topic>Polymers</topic><topic>Proton exchange membrane fuel cells</topic><topic>separation factor</topic><topic>Water chemistry</topic><topic>water electrolysis</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Oi, Takao</creatorcontrib><creatorcontrib>Seki, Kaishu</creatorcontrib><creatorcontrib>Kikawada, Yoshikazu</creatorcontrib><creatorcontrib>Yanase, Satoshi</creatorcontrib><collection>Environment Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Environment Abstracts</collection><collection>MEDLINE - Academic</collection><jtitle>Isotopes in environmental and health studies</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Oi, Takao</au><au>Seki, Kaishu</au><au>Kikawada, Yoshikazu</au><au>Yanase, Satoshi</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Observation of 18O/16O isotope effects at the cathode of a polymer electrolyte membrane fuel cell</atitle><jtitle>Isotopes in environmental and health studies</jtitle><date>2019-05-01</date><risdate>2019</risdate><volume>55</volume><issue>2</issue><spage>199</spage><epage>210</epage><pages>199-210</pages><issn>1025-6016</issn><eissn>1477-2639</eissn><abstract>18
O/
16
O isotope effects were observed at the cathode of a polymer electrolyte membrane fuel cell at 25 and 35°C. Results of experiments in which the
18
O/
16
O isotope ratios of the oxygen gases supplied to and exhausted from the cell were measured revealed that the lighter isotope
16
O reacted more preferentially to form water molecules at the cathode than the heavier one,
18
O. The value of the oxygen isotope separation factor, S
1
, defined as the ratio of the
18
O/
16
O isotope ratios of the oxygen gases supplied to and exhausted from the cell, ranged from 1.0030 to 1.0139, and tended to decrease with decreasing rate of oxygen utilisation (θ) and with increasing flow rate of the feed oxygen gas (D
F
). The value of another separation factor, S
2
, defined as the ratio of the
18
O/
16
O isotope ratios of the exhausted oxygen gas and oxygen having reacted to form water molecules at the cathode, ranged from 1.0049 to 1.0304. The S
2
value was much less affected by the change in θ and D
F
than the S
1
value with the majority of the S
2
value being in the range of 1.0240-1.0304.</abstract><cop>Amsterdam</cop><pub>Taylor & Francis</pub><doi>10.1080/10256016.2019.1575826</doi><tpages>12</tpages></addata></record> |
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| identifier | ISSN: 1025-6016 |
| ispartof | Isotopes in environmental and health studies, 2019-05, Vol.55 (2), p.199-210 |
| issn | 1025-6016 1477-2639 |
| language | eng |
| recordid | cdi_proquest_journals_2197251751 |
| source | Taylor and Francis Science and Technology Collection |
| subjects | Cathodes Electrolytes Equilibrium isotope effects Flow rates Flow velocity Fuel cells Fuel technology Gases Isotope ratios Isotope separation Isotopes kinetic isotope effects Oxygen Oxygen isotopes oxygen-18 Polymers Proton exchange membrane fuel cells separation factor Water chemistry water electrolysis |
| title | Observation of 18O/16O isotope effects at the cathode of a polymer electrolyte membrane fuel cell |
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