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A transition metal oxofluoride offering advantages in electrocatalysis and potential use in applications
The recently described solid solution (Co,Ni,Mn) 3 Sb 4 O 6 F 6 has proved stable and efficient as a catalyst for electrocatalytic water oxidation. The end component Co 3 Sb 4 O 6 F 6 was found to be most efficient, maintaining a current density of j = 10 mA cm −2 at an overpotential of 443 mV with...
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| Published in: | Faraday discussions 2016-01, Vol.188, p.481-498 |
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| Main Authors: | , , , , |
| Format: | Article |
| Language: | English |
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| cites | cdi_FETCH-LOGICAL-c416t-e2aaf6f21515b0aee1f78958a072bbde972f325fc5985dd56e40864b1e82d59d3 |
| container_end_page | 498 |
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| container_start_page | 481 |
| container_title | Faraday discussions |
| container_volume | 188 |
| creator | Svengren, H Torapava, N Athanassiadis, I Ali, S. I Johnsson, M |
| description | The recently described solid solution (Co,Ni,Mn)
3
Sb
4
O
6
F
6
has proved stable and efficient as a catalyst for electrocatalytic water oxidation. The end component Co
3
Sb
4
O
6
F
6
was found to be most efficient, maintaining a current density of
j
= 10 mA cm
−2
at an overpotential of 443 mV with good capability. At this current density, O
2
and H
2
were produced in the ratio 1 : 2 without loss of faradaic current against a Pt-cathode. A morphological change in the crystallite surface was observed after 0.5 h, however, even after 64.5 h, the overall shape and size of the small crystallites were unaffected and the electrolyte contained only 0.02 at% Co. It was also possible to conclude from
in situ
EXAFS measurements that the coordination around Co did not change. The oxofluorides express both hydrophilic and hydrophobic surface sites, incorporate a flexible metalloid element and offer the possibility of a mechanism that differs from other inorganic catalytic pathways previously described. |
| doi_str_mv | 10.1039/c5fd00169b |
| format | article |
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3
Sb
4
O
6
F
6
has proved stable and efficient as a catalyst for electrocatalytic water oxidation. The end component Co
3
Sb
4
O
6
F
6
was found to be most efficient, maintaining a current density of
j
= 10 mA cm
−2
at an overpotential of 443 mV with good capability. At this current density, O
2
and H
2
were produced in the ratio 1 : 2 without loss of faradaic current against a Pt-cathode. A morphological change in the crystallite surface was observed after 0.5 h, however, even after 64.5 h, the overall shape and size of the small crystallites were unaffected and the electrolyte contained only 0.02 at% Co. It was also possible to conclude from
in situ
EXAFS measurements that the coordination around Co did not change. The oxofluorides express both hydrophilic and hydrophobic surface sites, incorporate a flexible metalloid element and offer the possibility of a mechanism that differs from other inorganic catalytic pathways previously described.</description><identifier>ISSN: 1359-6640</identifier><identifier>ISSN: 1364-5498</identifier><identifier>EISSN: 1364-5498</identifier><identifier>DOI: 10.1039/c5fd00169b</identifier><identifier>PMID: 27064139</identifier><language>eng</language><publisher>England</publisher><subject>Catalysts ; Crystallites ; Current density ; Electrocatalysis ; Electrolytes ; Inorganic Chemistry ; oorganisk kemi ; Pathways ; Solid solutions ; Transition metals</subject><ispartof>Faraday discussions, 2016-01, Vol.188, p.481-498</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c416t-e2aaf6f21515b0aee1f78958a072bbde972f325fc5985dd56e40864b1e82d59d3</citedby><cites>FETCH-LOGICAL-c416t-e2aaf6f21515b0aee1f78958a072bbde972f325fc5985dd56e40864b1e82d59d3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,780,784,885,27924,27925</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/27064139$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink><backlink>$$Uhttps://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-133258$$DView record from Swedish Publication Index$$Hfree_for_read</backlink></links><search><creatorcontrib>Svengren, H</creatorcontrib><creatorcontrib>Torapava, N</creatorcontrib><creatorcontrib>Athanassiadis, I</creatorcontrib><creatorcontrib>Ali, S. I</creatorcontrib><creatorcontrib>Johnsson, M</creatorcontrib><title>A transition metal oxofluoride offering advantages in electrocatalysis and potential use in applications</title><title>Faraday discussions</title><addtitle>Faraday Discuss</addtitle><description>The recently described solid solution (Co,Ni,Mn)
3
Sb
4
O
6
F
6
has proved stable and efficient as a catalyst for electrocatalytic water oxidation. The end component Co
3
Sb
4
O
6
F
6
was found to be most efficient, maintaining a current density of
j
= 10 mA cm
−2
at an overpotential of 443 mV with good capability. At this current density, O
2
and H
2
were produced in the ratio 1 : 2 without loss of faradaic current against a Pt-cathode. A morphological change in the crystallite surface was observed after 0.5 h, however, even after 64.5 h, the overall shape and size of the small crystallites were unaffected and the electrolyte contained only 0.02 at% Co. It was also possible to conclude from
in situ
EXAFS measurements that the coordination around Co did not change. The oxofluorides express both hydrophilic and hydrophobic surface sites, incorporate a flexible metalloid element and offer the possibility of a mechanism that differs from other inorganic catalytic pathways previously described.</description><subject>Catalysts</subject><subject>Crystallites</subject><subject>Current density</subject><subject>Electrocatalysis</subject><subject>Electrolytes</subject><subject>Inorganic Chemistry</subject><subject>oorganisk kemi</subject><subject>Pathways</subject><subject>Solid solutions</subject><subject>Transition metals</subject><issn>1359-6640</issn><issn>1364-5498</issn><issn>1364-5498</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNqN0U1v1DAQBmALgWgpXLiDfESIgD9iJz5utxSQKnEBrpYTjxejbBw8DtB_j5cty5XTjDSPXo30EvKUs9ecSfNmVMEzxrUZ7pFzLnXbqNb09w-7Mo3WLTsjjxC_McZ0vT4kZ6JjuuXSnJOvG1qymzGWmGa6h-Immn6lMK0pRw80hQA5zjvq_A83F7cDpHGmMMFYchpd9bcYkbrZ0yUVmEusCSvCQbllmWI1NRofkwfBTQhP7uYF-Xz99tP2fXPz8d2H7eamGVuuSwPCuaCD4IqrgTkAHrreqN6xTgyDB9OJIIUKozK98l5paFmv24FDL7wyXl6QV8dc_AnLOtglx73Ltza5aK_il41NeWdxtVzWmL7yF0e-5PR9BSx2H3GEaXIzpBUt74VSmnVS_Adlou2k5qrSl0c65oSYIZze4MweOrNbdX31p7PLip_f5a7DHvyJ_i2pgmdHkHE8Xf-VLn8DbUadAQ</recordid><startdate>20160101</startdate><enddate>20160101</enddate><creator>Svengren, H</creator><creator>Torapava, N</creator><creator>Athanassiadis, I</creator><creator>Ali, S. I</creator><creator>Johnsson, M</creator><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>ADTPV</scope><scope>AOWAS</scope><scope>DG7</scope></search><sort><creationdate>20160101</creationdate><title>A transition metal oxofluoride offering advantages in electrocatalysis and potential use in applications</title><author>Svengren, H ; Torapava, N ; Athanassiadis, I ; Ali, S. I ; Johnsson, M</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c416t-e2aaf6f21515b0aee1f78958a072bbde972f325fc5985dd56e40864b1e82d59d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Catalysts</topic><topic>Crystallites</topic><topic>Current density</topic><topic>Electrocatalysis</topic><topic>Electrolytes</topic><topic>Inorganic Chemistry</topic><topic>oorganisk kemi</topic><topic>Pathways</topic><topic>Solid solutions</topic><topic>Transition metals</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Svengren, H</creatorcontrib><creatorcontrib>Torapava, N</creatorcontrib><creatorcontrib>Athanassiadis, I</creatorcontrib><creatorcontrib>Ali, S. I</creatorcontrib><creatorcontrib>Johnsson, M</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>SwePub</collection><collection>SwePub Articles</collection><collection>SWEPUB Stockholms universitet</collection><jtitle>Faraday discussions</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Svengren, H</au><au>Torapava, N</au><au>Athanassiadis, I</au><au>Ali, S. I</au><au>Johnsson, M</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A transition metal oxofluoride offering advantages in electrocatalysis and potential use in applications</atitle><jtitle>Faraday discussions</jtitle><addtitle>Faraday Discuss</addtitle><date>2016-01-01</date><risdate>2016</risdate><volume>188</volume><spage>481</spage><epage>498</epage><pages>481-498</pages><issn>1359-6640</issn><issn>1364-5498</issn><eissn>1364-5498</eissn><abstract>The recently described solid solution (Co,Ni,Mn)
3
Sb
4
O
6
F
6
has proved stable and efficient as a catalyst for electrocatalytic water oxidation. The end component Co
3
Sb
4
O
6
F
6
was found to be most efficient, maintaining a current density of
j
= 10 mA cm
−2
at an overpotential of 443 mV with good capability. At this current density, O
2
and H
2
were produced in the ratio 1 : 2 without loss of faradaic current against a Pt-cathode. A morphological change in the crystallite surface was observed after 0.5 h, however, even after 64.5 h, the overall shape and size of the small crystallites were unaffected and the electrolyte contained only 0.02 at% Co. It was also possible to conclude from
in situ
EXAFS measurements that the coordination around Co did not change. The oxofluorides express both hydrophilic and hydrophobic surface sites, incorporate a flexible metalloid element and offer the possibility of a mechanism that differs from other inorganic catalytic pathways previously described.</abstract><cop>England</cop><pmid>27064139</pmid><doi>10.1039/c5fd00169b</doi><tpages>18</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 1359-6640 |
| ispartof | Faraday discussions, 2016-01, Vol.188, p.481-498 |
| issn | 1359-6640 1364-5498 1364-5498 |
| language | eng |
| recordid | cdi_swepub_primary_oai_DiVA_org_su_133258 |
| source | Royal Society of Chemistry |
| subjects | Catalysts Crystallites Current density Electrocatalysis Electrolytes Inorganic Chemistry oorganisk kemi Pathways Solid solutions Transition metals |
| title | A transition metal oxofluoride offering advantages in electrocatalysis and potential use in applications |
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