OER activity manipulated by IrO 6 coordination geometry: an insight from pyrochlore iridates
The anodic reaction of oxygen evolution reaction (OER), an important point for electrolysis, however, remains the obstacle due to its complicated reaction at electrochemical interfaces. Iridium oxide (IrO ) is the only currently known 5d transition metal oxide possessing admirable OER activity. Trem...
Gespeichert in:
Veröffentlicht in: | Scientific reports 2016-12, Vol.6, p.38429 |
---|---|
Hauptverfasser: | , , , , , |
Format: | Artikel |
Sprache: | eng |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
container_end_page | |
---|---|
container_issue | |
container_start_page | 38429 |
container_title | Scientific reports |
container_volume | 6 |
creator | Sun, Wei Liu, Ji-Yuan Gong, Xue-Qing Zaman, Waqas-Qamar Cao, Li-Mei Yang, Ji |
description | The anodic reaction of oxygen evolution reaction (OER), an important point for electrolysis, however, remains the obstacle due to its complicated reaction at electrochemical interfaces. Iridium oxide (IrO
) is the only currently known 5d transition metal oxide possessing admirable OER activity. Tremendous efforts have been carried out to enhance the activity of iridium oxides. Unfortunately there lies a gap in understanding what factors responsible for the activity in doped IrO
or the novel crystal structure. Based on two metallic pyrochlores (Bi
Ir
O
and Pb
Ir
O
) and IrO
. It has been found that there exists a strong correlation between the specific OER activity and IrO
coordination geometry. The more distortion in IrO
geometry ascends the activity of Ir sites, and generates activity order of Pb-Ir > IrO
> Bi-Ir. Our characterizations reveal that distorted IrO
in Pb-Ir induces a disappearance of J = 1/2 subbands in valence band, while Bi-Ir and IrO
resist this nature probe. The performed DFT calculations indicated the distortion in IrO
geometry can optimize binding strength between Ir-5d and O-2p due to broader d band width. Based on this insight, enhancement in OER activity is obtained by effects that change IrO
octahedral geometry through doping or utilizing structural manipulation with nature of distorted octahedral coordination. |
doi_str_mv | 10.1038/srep38429 |
format | Article |
fullrecord | <record><control><sourceid>pubmed</sourceid><recordid>TN_cdi_pubmed_primary_27910932</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>27910932</sourcerecordid><originalsourceid>FETCH-LOGICAL-p93t-3200352c9d9eb94fae4725e02393b2ea87a3c4a89f71f2a8176e81937e3fe0ca3</originalsourceid><addsrcrecordid>eNo1j9FKwzAUQIMgbsw9-AOSH6gm97Zr45uMqYNBQfYojNv2dou0TUkyoX_vQHdeztuBI8SDVk9aYfEcPI9YpGBuxBxUmiWAADOxDOFbXcjApNrciRnkRiuDMBdf5eZTUh3tj42T7Gmw47mjyI2sJrn1pVzJ2jnf2IGidYM8sus5-ulF0iDtEOzxFGXrXS_Hybv61DnP0nrbXBrhXty21AVe_nsh9m-b_foj2ZXv2_XrLhkNxgRBKcygNo3hyqQtcZpDxgrQYAVMRU5Yp1SYNtctUKHzFRfaYM7YsqoJF-LxLzueq56bw-htT346XC_xF79iUx8</addsrcrecordid><sourcetype>Index Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype></control><display><type>article</type><title>OER activity manipulated by IrO 6 coordination geometry: an insight from pyrochlore iridates</title><source>DOAJ Directory of Open Access Journals</source><source>Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals</source><source>Springer Nature OA Free Journals</source><source>Nature Free</source><source>PubMed Central</source><source>Free Full-Text Journals in Chemistry</source><creator>Sun, Wei ; Liu, Ji-Yuan ; Gong, Xue-Qing ; Zaman, Waqas-Qamar ; Cao, Li-Mei ; Yang, Ji</creator><creatorcontrib>Sun, Wei ; Liu, Ji-Yuan ; Gong, Xue-Qing ; Zaman, Waqas-Qamar ; Cao, Li-Mei ; Yang, Ji</creatorcontrib><description>The anodic reaction of oxygen evolution reaction (OER), an important point for electrolysis, however, remains the obstacle due to its complicated reaction at electrochemical interfaces. Iridium oxide (IrO
) is the only currently known 5d transition metal oxide possessing admirable OER activity. Tremendous efforts have been carried out to enhance the activity of iridium oxides. Unfortunately there lies a gap in understanding what factors responsible for the activity in doped IrO
or the novel crystal structure. Based on two metallic pyrochlores (Bi
Ir
O
and Pb
Ir
O
) and IrO
. It has been found that there exists a strong correlation between the specific OER activity and IrO
coordination geometry. The more distortion in IrO
geometry ascends the activity of Ir sites, and generates activity order of Pb-Ir > IrO
> Bi-Ir. Our characterizations reveal that distorted IrO
in Pb-Ir induces a disappearance of J = 1/2 subbands in valence band, while Bi-Ir and IrO
resist this nature probe. The performed DFT calculations indicated the distortion in IrO
geometry can optimize binding strength between Ir-5d and O-2p due to broader d band width. Based on this insight, enhancement in OER activity is obtained by effects that change IrO
octahedral geometry through doping or utilizing structural manipulation with nature of distorted octahedral coordination.</description><identifier>EISSN: 2045-2322</identifier><identifier>DOI: 10.1038/srep38429</identifier><identifier>PMID: 27910932</identifier><language>eng</language><publisher>England</publisher><ispartof>Scientific reports, 2016-12, Vol.6, p.38429</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,781,785,865,27928,27929</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/27910932$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Sun, Wei</creatorcontrib><creatorcontrib>Liu, Ji-Yuan</creatorcontrib><creatorcontrib>Gong, Xue-Qing</creatorcontrib><creatorcontrib>Zaman, Waqas-Qamar</creatorcontrib><creatorcontrib>Cao, Li-Mei</creatorcontrib><creatorcontrib>Yang, Ji</creatorcontrib><title>OER activity manipulated by IrO 6 coordination geometry: an insight from pyrochlore iridates</title><title>Scientific reports</title><addtitle>Sci Rep</addtitle><description>The anodic reaction of oxygen evolution reaction (OER), an important point for electrolysis, however, remains the obstacle due to its complicated reaction at electrochemical interfaces. Iridium oxide (IrO
) is the only currently known 5d transition metal oxide possessing admirable OER activity. Tremendous efforts have been carried out to enhance the activity of iridium oxides. Unfortunately there lies a gap in understanding what factors responsible for the activity in doped IrO
or the novel crystal structure. Based on two metallic pyrochlores (Bi
Ir
O
and Pb
Ir
O
) and IrO
. It has been found that there exists a strong correlation between the specific OER activity and IrO
coordination geometry. The more distortion in IrO
geometry ascends the activity of Ir sites, and generates activity order of Pb-Ir > IrO
> Bi-Ir. Our characterizations reveal that distorted IrO
in Pb-Ir induces a disappearance of J = 1/2 subbands in valence band, while Bi-Ir and IrO
resist this nature probe. The performed DFT calculations indicated the distortion in IrO
geometry can optimize binding strength between Ir-5d and O-2p due to broader d band width. Based on this insight, enhancement in OER activity is obtained by effects that change IrO
octahedral geometry through doping or utilizing structural manipulation with nature of distorted octahedral coordination.</description><issn>2045-2322</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNo1j9FKwzAUQIMgbsw9-AOSH6gm97Zr45uMqYNBQfYojNv2dou0TUkyoX_vQHdeztuBI8SDVk9aYfEcPI9YpGBuxBxUmiWAADOxDOFbXcjApNrciRnkRiuDMBdf5eZTUh3tj42T7Gmw47mjyI2sJrn1pVzJ2jnf2IGidYM8sus5-ulF0iDtEOzxFGXrXS_Hybv61DnP0nrbXBrhXty21AVe_nsh9m-b_foj2ZXv2_XrLhkNxgRBKcygNo3hyqQtcZpDxgrQYAVMRU5Yp1SYNtctUKHzFRfaYM7YsqoJF-LxLzueq56bw-htT346XC_xF79iUx8</recordid><startdate>20161202</startdate><enddate>20161202</enddate><creator>Sun, Wei</creator><creator>Liu, Ji-Yuan</creator><creator>Gong, Xue-Qing</creator><creator>Zaman, Waqas-Qamar</creator><creator>Cao, Li-Mei</creator><creator>Yang, Ji</creator><scope>NPM</scope></search><sort><creationdate>20161202</creationdate><title>OER activity manipulated by IrO 6 coordination geometry: an insight from pyrochlore iridates</title><author>Sun, Wei ; Liu, Ji-Yuan ; Gong, Xue-Qing ; Zaman, Waqas-Qamar ; Cao, Li-Mei ; Yang, Ji</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-p93t-3200352c9d9eb94fae4725e02393b2ea87a3c4a89f71f2a8176e81937e3fe0ca3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sun, Wei</creatorcontrib><creatorcontrib>Liu, Ji-Yuan</creatorcontrib><creatorcontrib>Gong, Xue-Qing</creatorcontrib><creatorcontrib>Zaman, Waqas-Qamar</creatorcontrib><creatorcontrib>Cao, Li-Mei</creatorcontrib><creatorcontrib>Yang, Ji</creatorcontrib><collection>PubMed</collection><jtitle>Scientific reports</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Sun, Wei</au><au>Liu, Ji-Yuan</au><au>Gong, Xue-Qing</au><au>Zaman, Waqas-Qamar</au><au>Cao, Li-Mei</au><au>Yang, Ji</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>OER activity manipulated by IrO 6 coordination geometry: an insight from pyrochlore iridates</atitle><jtitle>Scientific reports</jtitle><addtitle>Sci Rep</addtitle><date>2016-12-02</date><risdate>2016</risdate><volume>6</volume><spage>38429</spage><pages>38429-</pages><eissn>2045-2322</eissn><abstract>The anodic reaction of oxygen evolution reaction (OER), an important point for electrolysis, however, remains the obstacle due to its complicated reaction at electrochemical interfaces. Iridium oxide (IrO
) is the only currently known 5d transition metal oxide possessing admirable OER activity. Tremendous efforts have been carried out to enhance the activity of iridium oxides. Unfortunately there lies a gap in understanding what factors responsible for the activity in doped IrO
or the novel crystal structure. Based on two metallic pyrochlores (Bi
Ir
O
and Pb
Ir
O
) and IrO
. It has been found that there exists a strong correlation between the specific OER activity and IrO
coordination geometry. The more distortion in IrO
geometry ascends the activity of Ir sites, and generates activity order of Pb-Ir > IrO
> Bi-Ir. Our characterizations reveal that distorted IrO
in Pb-Ir induces a disappearance of J = 1/2 subbands in valence band, while Bi-Ir and IrO
resist this nature probe. The performed DFT calculations indicated the distortion in IrO
geometry can optimize binding strength between Ir-5d and O-2p due to broader d band width. Based on this insight, enhancement in OER activity is obtained by effects that change IrO
octahedral geometry through doping or utilizing structural manipulation with nature of distorted octahedral coordination.</abstract><cop>England</cop><pmid>27910932</pmid><doi>10.1038/srep38429</doi></addata></record> |
fulltext | fulltext |
identifier | EISSN: 2045-2322 |
ispartof | Scientific reports, 2016-12, Vol.6, p.38429 |
issn | 2045-2322 |
language | eng |
recordid | cdi_pubmed_primary_27910932 |
source | DOAJ Directory of Open Access Journals; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Springer Nature OA Free Journals; Nature Free; PubMed Central; Free Full-Text Journals in Chemistry |
title | OER activity manipulated by IrO 6 coordination geometry: an insight from pyrochlore iridates |
url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-17T13%3A07%3A29IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-pubmed&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=OER%20activity%20manipulated%20by%20IrO%206%20coordination%20geometry:%20an%20insight%20from%20pyrochlore%20iridates&rft.jtitle=Scientific%20reports&rft.au=Sun,%20Wei&rft.date=2016-12-02&rft.volume=6&rft.spage=38429&rft.pages=38429-&rft.eissn=2045-2322&rft_id=info:doi/10.1038/srep38429&rft_dat=%3Cpubmed%3E27910932%3C/pubmed%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_id=info:pmid/27910932&rfr_iscdi=true |