A microstructured p-Si photocathode outcompetes Pt as a counter electrode to hematite in photoelectrochemical water splitting
Herein, we communicate about an Earth-abundant semiconductor photocathode (p-Si/TiO 2 /NiO x ) as an alternative for the rare and expensive Pt as a counter electrode for overall photoelectrochemical water splitting. The proposed photoelectrochemical (PEC) water-splitting device mimics the "Z&qu...
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| Veröffentlicht in: | Dalton transactions : an international journal of inorganic chemistry 2019, Vol.48 (4), p.1166-117 |
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| container_title | Dalton transactions : an international journal of inorganic chemistry |
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| creator | Kawde, Anurag Annamalai, Alagappan Sellstedt, Anita Glatzel, Pieter Wågberg, Thomas Messinger, Johannes |
| description | Herein, we communicate about an Earth-abundant semiconductor photocathode (p-Si/TiO
2
/NiO
x
) as an alternative for the rare and expensive Pt as a counter electrode for overall photoelectrochemical water splitting. The proposed photoelectrochemical (PEC) water-splitting device mimics the "Z"-scheme observed in natural photosynthesis by combining two photoelectrodes in a parallel-illumination mode. A nearly 60% increase in the photocurrent density (
J
ph
) for pristine α-Fe
2
O
3
and a 77% increase in the applied bias photocurrent efficiency (ABPE) were achieved by replacing the conventionally used Pt cathode with an efficient, cost effective p-Si/TiO
2
/NiO
x
photocathode under parallel illumination. The resulting photocurrent density of 1.26 mA cm
−2
at 1.23
V
RHE
represents a new record performance for hydrothermally grown pristine α-Fe
2
O
3
nanorod photoanodes in combination with a photocathode, which opens the prospect for further improvement by doping α-Fe
2
O
3
or by its decoration with co-catalysts. Electrochemical impedance spectroscopy measurements suggest that this significant performance increase is due to the enhancement of the space-charge field in α-Fe
2
O
3
.
Herein we demonstrate that an earth-abundant semiconductor photocathode (p-Si/TiO
2
/NiO
x
) out-competes rare and expensive Pt as counter electrode to Fe-oxide for overall photoelectrochemical water splitting. |
| doi_str_mv | 10.1039/c8dt03653e |
| format | Article |
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2
/NiO
x
) as an alternative for the rare and expensive Pt as a counter electrode for overall photoelectrochemical water splitting. The proposed photoelectrochemical (PEC) water-splitting device mimics the "Z"-scheme observed in natural photosynthesis by combining two photoelectrodes in a parallel-illumination mode. A nearly 60% increase in the photocurrent density (
J
ph
) for pristine α-Fe
2
O
3
and a 77% increase in the applied bias photocurrent efficiency (ABPE) were achieved by replacing the conventionally used Pt cathode with an efficient, cost effective p-Si/TiO
2
/NiO
x
photocathode under parallel illumination. The resulting photocurrent density of 1.26 mA cm
−2
at 1.23
V
RHE
represents a new record performance for hydrothermally grown pristine α-Fe
2
O
3
nanorod photoanodes in combination with a photocathode, which opens the prospect for further improvement by doping α-Fe
2
O
3
or by its decoration with co-catalysts. Electrochemical impedance spectroscopy measurements suggest that this significant performance increase is due to the enhancement of the space-charge field in α-Fe
2
O
3
.
Herein we demonstrate that an earth-abundant semiconductor photocathode (p-Si/TiO
2
/NiO
x
) out-competes rare and expensive Pt as counter electrode to Fe-oxide for overall photoelectrochemical water splitting.</description><identifier>ISSN: 1477-9226</identifier><identifier>ISSN: 1477-9234</identifier><identifier>EISSN: 1477-9234</identifier><identifier>DOI: 10.1039/c8dt03653e</identifier><identifier>PMID: 30534760</identifier><language>eng</language><publisher>England: Royal Society of Chemistry</publisher><subject>Chemical Sciences ; Density ; Electrochemical impedance spectroscopy ; Electrodes ; Hematite ; Illumination ; Nanorods ; Photocathodes ; Photoelectric effect ; Photoelectric emission ; Photosynthesis ; Silicon ; Titanium dioxide ; Water splitting</subject><ispartof>Dalton transactions : an international journal of inorganic chemistry, 2019, Vol.48 (4), p.1166-117</ispartof><rights>Copyright Royal Society of Chemistry 2019</rights><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c482t-a0627f4741974fd97c5c200b0cad4e1c8617748bfcc1fcf8a26a595015d573a13</citedby><cites>FETCH-LOGICAL-c482t-a0627f4741974fd97c5c200b0cad4e1c8617748bfcc1fcf8a26a595015d573a13</cites><orcidid>0000-0001-6532-8144 ; 0000-0002-5210-2645 ; 0000-0003-2790-7721 ; 0000-0002-5027-9199</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,552,780,784,885,4024,27923,27924,27925</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/30534760$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink><backlink>$$Uhttps://hal.science/hal-02976318$$DView record in HAL$$Hfree_for_read</backlink><backlink>$$Uhttps://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-153415$$DView record from Swedish Publication Index$$Hfree_for_read</backlink><backlink>$$Uhttps://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-379234$$DView record from Swedish Publication Index$$Hfree_for_read</backlink></links><search><creatorcontrib>Kawde, Anurag</creatorcontrib><creatorcontrib>Annamalai, Alagappan</creatorcontrib><creatorcontrib>Sellstedt, Anita</creatorcontrib><creatorcontrib>Glatzel, Pieter</creatorcontrib><creatorcontrib>Wågberg, Thomas</creatorcontrib><creatorcontrib>Messinger, Johannes</creatorcontrib><title>A microstructured p-Si photocathode outcompetes Pt as a counter electrode to hematite in photoelectrochemical water splitting</title><title>Dalton transactions : an international journal of inorganic chemistry</title><addtitle>Dalton Trans</addtitle><description>Herein, we communicate about an Earth-abundant semiconductor photocathode (p-Si/TiO
2
/NiO
x
) as an alternative for the rare and expensive Pt as a counter electrode for overall photoelectrochemical water splitting. The proposed photoelectrochemical (PEC) water-splitting device mimics the "Z"-scheme observed in natural photosynthesis by combining two photoelectrodes in a parallel-illumination mode. A nearly 60% increase in the photocurrent density (
J
ph
) for pristine α-Fe
2
O
3
and a 77% increase in the applied bias photocurrent efficiency (ABPE) were achieved by replacing the conventionally used Pt cathode with an efficient, cost effective p-Si/TiO
2
/NiO
x
photocathode under parallel illumination. The resulting photocurrent density of 1.26 mA cm
−2
at 1.23
V
RHE
represents a new record performance for hydrothermally grown pristine α-Fe
2
O
3
nanorod photoanodes in combination with a photocathode, which opens the prospect for further improvement by doping α-Fe
2
O
3
or by its decoration with co-catalysts. Electrochemical impedance spectroscopy measurements suggest that this significant performance increase is due to the enhancement of the space-charge field in α-Fe
2
O
3
.
Herein we demonstrate that an earth-abundant semiconductor photocathode (p-Si/TiO
2
/NiO
x
) out-competes rare and expensive Pt as counter electrode to Fe-oxide for overall photoelectrochemical water splitting.</description><subject>Chemical Sciences</subject><subject>Density</subject><subject>Electrochemical impedance spectroscopy</subject><subject>Electrodes</subject><subject>Hematite</subject><subject>Illumination</subject><subject>Nanorods</subject><subject>Photocathodes</subject><subject>Photoelectric effect</subject><subject>Photoelectric emission</subject><subject>Photosynthesis</subject><subject>Silicon</subject><subject>Titanium dioxide</subject><subject>Water splitting</subject><issn>1477-9226</issn><issn>1477-9234</issn><issn>1477-9234</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>D8T</sourceid><recordid>eNqN0s2L1DAUAPAgirs7evGuBLyoWM1n0xyH2dUVBhRcvYZMmu5kaZuaD5c9-L-b2nFETx5CQt4vj8fLA-AJRm8wovKtadqEaM2pvQdOMROikoSy-8czqU_AWYw3CBGCOHkITijilIkanYIfazg4E3xMIZuUg23hVH12cNr75I1Oe99a6HMyfphsshF-SlBHqKHxeUw2QNtbk8Kskod7O-jkkoVuXDIcoqYEnNE9vNXzmzj1LiU3Xj8CDzrdR_v4sK_Al3cXV5vLavvx_YfNelsZ1pBUaVQT0THBsBSsa6Uw3BCEdsjolllsmhoLwZpdZwzuTNdoUmsuOcK85YJqTFfg9ZI33top79QU3KDDnfLaqXP3da18uFY5KyrmzhVe_QcfssKljWWtwMvF73X_F75cb9V8h4gUNcXN97mUF4udgv-WbUxqcNHYvtej9TkqgjnHAjPZFPr8H3rjcxhLo4qqJUEN57KoV4uafzEG2x0rwEjN86E2zfnVr_m4KPjZIWXeDbY90t8DUcDTBYRojtE_A0Z_Asi7wFM</recordid><startdate>2019</startdate><enddate>2019</enddate><creator>Kawde, Anurag</creator><creator>Annamalai, Alagappan</creator><creator>Sellstedt, Anita</creator><creator>Glatzel, Pieter</creator><creator>Wågberg, Thomas</creator><creator>Messinger, Johannes</creator><general>Royal Society of Chemistry</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope><scope>7X8</scope><scope>1XC</scope><scope>VOOES</scope><scope>ADHXS</scope><scope>ADTPV</scope><scope>AOWAS</scope><scope>D8T</scope><scope>D93</scope><scope>ZZAVC</scope><scope>ACNBI</scope><scope>DF2</scope><orcidid>https://orcid.org/0000-0001-6532-8144</orcidid><orcidid>https://orcid.org/0000-0002-5210-2645</orcidid><orcidid>https://orcid.org/0000-0003-2790-7721</orcidid><orcidid>https://orcid.org/0000-0002-5027-9199</orcidid></search><sort><creationdate>2019</creationdate><title>A microstructured p-Si photocathode outcompetes Pt as a counter electrode to hematite in photoelectrochemical water splitting</title><author>Kawde, Anurag ; Annamalai, Alagappan ; Sellstedt, Anita ; Glatzel, Pieter ; Wågberg, Thomas ; Messinger, Johannes</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c482t-a0627f4741974fd97c5c200b0cad4e1c8617748bfcc1fcf8a26a595015d573a13</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Chemical Sciences</topic><topic>Density</topic><topic>Electrochemical impedance spectroscopy</topic><topic>Electrodes</topic><topic>Hematite</topic><topic>Illumination</topic><topic>Nanorods</topic><topic>Photocathodes</topic><topic>Photoelectric effect</topic><topic>Photoelectric emission</topic><topic>Photosynthesis</topic><topic>Silicon</topic><topic>Titanium dioxide</topic><topic>Water splitting</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kawde, Anurag</creatorcontrib><creatorcontrib>Annamalai, Alagappan</creatorcontrib><creatorcontrib>Sellstedt, Anita</creatorcontrib><creatorcontrib>Glatzel, Pieter</creatorcontrib><creatorcontrib>Wågberg, Thomas</creatorcontrib><creatorcontrib>Messinger, Johannes</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>MEDLINE - Academic</collection><collection>Hyper Article en Ligne (HAL)</collection><collection>Hyper Article en Ligne (HAL) (Open Access)</collection><collection>SWEPUB Umeå universitet full text</collection><collection>SwePub</collection><collection>SwePub Articles</collection><collection>SWEPUB Freely available online</collection><collection>SWEPUB Umeå universitet</collection><collection>SwePub Articles full text</collection><collection>SWEPUB Uppsala universitet full text</collection><collection>SWEPUB Uppsala universitet</collection><jtitle>Dalton transactions : an international journal of inorganic chemistry</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kawde, Anurag</au><au>Annamalai, Alagappan</au><au>Sellstedt, Anita</au><au>Glatzel, Pieter</au><au>Wågberg, Thomas</au><au>Messinger, Johannes</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A microstructured p-Si photocathode outcompetes Pt as a counter electrode to hematite in photoelectrochemical water splitting</atitle><jtitle>Dalton transactions : an international journal of inorganic chemistry</jtitle><addtitle>Dalton Trans</addtitle><date>2019</date><risdate>2019</risdate><volume>48</volume><issue>4</issue><spage>1166</spage><epage>117</epage><pages>1166-117</pages><issn>1477-9226</issn><issn>1477-9234</issn><eissn>1477-9234</eissn><abstract>Herein, we communicate about an Earth-abundant semiconductor photocathode (p-Si/TiO
2
/NiO
x
) as an alternative for the rare and expensive Pt as a counter electrode for overall photoelectrochemical water splitting. The proposed photoelectrochemical (PEC) water-splitting device mimics the "Z"-scheme observed in natural photosynthesis by combining two photoelectrodes in a parallel-illumination mode. A nearly 60% increase in the photocurrent density (
J
ph
) for pristine α-Fe
2
O
3
and a 77% increase in the applied bias photocurrent efficiency (ABPE) were achieved by replacing the conventionally used Pt cathode with an efficient, cost effective p-Si/TiO
2
/NiO
x
photocathode under parallel illumination. The resulting photocurrent density of 1.26 mA cm
−2
at 1.23
V
RHE
represents a new record performance for hydrothermally grown pristine α-Fe
2
O
3
nanorod photoanodes in combination with a photocathode, which opens the prospect for further improvement by doping α-Fe
2
O
3
or by its decoration with co-catalysts. Electrochemical impedance spectroscopy measurements suggest that this significant performance increase is due to the enhancement of the space-charge field in α-Fe
2
O
3
.
Herein we demonstrate that an earth-abundant semiconductor photocathode (p-Si/TiO
2
/NiO
x
) out-competes rare and expensive Pt as counter electrode to Fe-oxide for overall photoelectrochemical water splitting.</abstract><cop>England</cop><pub>Royal Society of Chemistry</pub><pmid>30534760</pmid><doi>10.1039/c8dt03653e</doi><tpages>5</tpages><orcidid>https://orcid.org/0000-0001-6532-8144</orcidid><orcidid>https://orcid.org/0000-0002-5210-2645</orcidid><orcidid>https://orcid.org/0000-0003-2790-7721</orcidid><orcidid>https://orcid.org/0000-0002-5027-9199</orcidid><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 1477-9226 |
| ispartof | Dalton transactions : an international journal of inorganic chemistry, 2019, Vol.48 (4), p.1166-117 |
| issn | 1477-9226 1477-9234 1477-9234 |
| language | eng |
| recordid | cdi_hal_primary_oai_HAL_hal_02976318v1 |
| source | Royal Society Of Chemistry Journals 2008-; Alma/SFX Local Collection; SWEPUB Freely available online |
| subjects | Chemical Sciences Density Electrochemical impedance spectroscopy Electrodes Hematite Illumination Nanorods Photocathodes Photoelectric effect Photoelectric emission Photosynthesis Silicon Titanium dioxide Water splitting |
| title | A microstructured p-Si photocathode outcompetes Pt as a counter electrode to hematite in photoelectrochemical water splitting |
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