Photoelectrochemical water splitting by hematite boosted in a heterojunction with B-doped g-CN nanosheets and carbon nanotubes
Here, we effectively layered economically viable pyrolytic carbon nanotubes (p-CNTs) as solid-state mediators to accelerate the charge carrier transfer between hematite (α-Fe 2 O 3 ) and boron-doped graphitic carbon nitride (B-C 3 N 4 ). This synergistic combination leads to higher photoelectrochemi...
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| Veröffentlicht in: | Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2024-07, Vol.12 (3), p.19247-19258 |
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| container_title | Journal of materials chemistry. A, Materials for energy and sustainability |
| container_volume | 12 |
| creator | Khan, Irfan Benkó, Tímea Horváth, Anita Shen, Shaohua Su, Jinzhan Wang, Yiqing Horváth, Zsolt E Németh, Miklós Czigány, Zsolt Zámbó, Dániel Pap, József Sándor |
| description | Here, we effectively layered economically viable pyrolytic carbon nanotubes (p-CNTs) as solid-state mediators to accelerate the charge carrier transfer between hematite (α-Fe
2
O
3
) and boron-doped graphitic carbon nitride (B-C
3
N
4
). This synergistic combination leads to higher photoelectrochemical water splitting performance with a photoanodic current density of 2.85 mA cm
−2
, which is a 4.1-fold enhancement compared to pristine α-Fe
2
O
3
and the O
2
evolution rate detected was 22.70 μmol h
−1
cm
−2
with a Faraday efficiency of ∼98% at 1.7 V
RHE
. Mott-Schottky analysis confirms the highest donor density of 55.7 × 10
19
cm
−3
for the α-Fe
2
O
3
/B-C
3
N
4
/p-CNT photoanode, compared to α-Fe
2
O
3
and α-Fe
2
O
3
/B-C
3
N
4
. Superstructuring the B-C
3
N
4
and p-CNT onto pristine α-Fe
2
O
3
enhances the charge separation and transfer efficiencies, and moreover mitigates recombination losses. DFT calculations suggest the type II charge transfer mechanism switched to an enhanced Z-scheme type by simple deposition of p-CNT on the α-Fe
2
O
3
/B-C
3
N
4
heterojunction. Achieving such cost-effective, highly efficient hematite-based photoanodes offers an opportunity to fabricate tandem photoelectrochemical devices for low-cost solar fuel production.
Enhanced PEC water splitting with an α-Fe
2
O
3
/B-C
3
N
4
type II heterojunction. Use of pyrolytic (p-)CNT to improve photoanodic current density. Improved electrical conductivity for facile charge separation & transfer. DFT hints at a Z-scheme mechanism. |
| doi_str_mv | 10.1039/d4ta02512a |
| format | Article |
| fullrecord | <record><control><sourceid>rsc</sourceid><recordid>TN_cdi_rsc_primary_d4ta02512a</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>d4ta02512a</sourcerecordid><originalsourceid>FETCH-rsc_primary_d4ta02512a3</originalsourceid><addsrcrecordid>eNqFj71uwkAQhE9RIgUlNPSR9gVMzuYndhtERBVR0KP1ecGHzK11uwjR5Nm5SIiUmWZGM18zxoxyO87tpHpvpoq2mOUFPphBYWc2-5hW88d7LstnMxQ52KTS2nlVDczPumVl6shpZNfS0Tvs4IxKEaTvvKoPe6gvkCZUrwQ1syg14ANgahPIh1Nw6jnA2WsLn1nDfQL22eIbAgaWlkgFMDTgMNaJ-231VJO8mqcddkLDm7-Yt6_lZrHKorhtH_0R42X792vy334FfF1TJw</addsrcrecordid><sourcetype>Publisher</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype></control><display><type>article</type><title>Photoelectrochemical water splitting by hematite boosted in a heterojunction with B-doped g-CN nanosheets and carbon nanotubes</title><source>Royal Society Of Chemistry Journals 2008-</source><creator>Khan, Irfan ; Benkó, Tímea ; Horváth, Anita ; Shen, Shaohua ; Su, Jinzhan ; Wang, Yiqing ; Horváth, Zsolt E ; Németh, Miklós ; Czigány, Zsolt ; Zámbó, Dániel ; Pap, József Sándor</creator><creatorcontrib>Khan, Irfan ; Benkó, Tímea ; Horváth, Anita ; Shen, Shaohua ; Su, Jinzhan ; Wang, Yiqing ; Horváth, Zsolt E ; Németh, Miklós ; Czigány, Zsolt ; Zámbó, Dániel ; Pap, József Sándor</creatorcontrib><description>Here, we effectively layered economically viable pyrolytic carbon nanotubes (p-CNTs) as solid-state mediators to accelerate the charge carrier transfer between hematite (α-Fe
2
O
3
) and boron-doped graphitic carbon nitride (B-C
3
N
4
). This synergistic combination leads to higher photoelectrochemical water splitting performance with a photoanodic current density of 2.85 mA cm
−2
, which is a 4.1-fold enhancement compared to pristine α-Fe
2
O
3
and the O
2
evolution rate detected was 22.70 μmol h
−1
cm
−2
with a Faraday efficiency of ∼98% at 1.7 V
RHE
. Mott-Schottky analysis confirms the highest donor density of 55.7 × 10
19
cm
−3
for the α-Fe
2
O
3
/B-C
3
N
4
/p-CNT photoanode, compared to α-Fe
2
O
3
and α-Fe
2
O
3
/B-C
3
N
4
. Superstructuring the B-C
3
N
4
and p-CNT onto pristine α-Fe
2
O
3
enhances the charge separation and transfer efficiencies, and moreover mitigates recombination losses. DFT calculations suggest the type II charge transfer mechanism switched to an enhanced Z-scheme type by simple deposition of p-CNT on the α-Fe
2
O
3
/B-C
3
N
4
heterojunction. Achieving such cost-effective, highly efficient hematite-based photoanodes offers an opportunity to fabricate tandem photoelectrochemical devices for low-cost solar fuel production.
Enhanced PEC water splitting with an α-Fe
2
O
3
/B-C
3
N
4
type II heterojunction. Use of pyrolytic (p-)CNT to improve photoanodic current density. Improved electrical conductivity for facile charge separation & transfer. DFT hints at a Z-scheme mechanism.</description><identifier>ISSN: 2050-7488</identifier><identifier>EISSN: 2050-7496</identifier><identifier>DOI: 10.1039/d4ta02512a</identifier><ispartof>Journal of materials chemistry. A, Materials for energy and sustainability, 2024-07, Vol.12 (3), p.19247-19258</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>314,780,784,27923,27924</link.rule.ids></links><search><creatorcontrib>Khan, Irfan</creatorcontrib><creatorcontrib>Benkó, Tímea</creatorcontrib><creatorcontrib>Horváth, Anita</creatorcontrib><creatorcontrib>Shen, Shaohua</creatorcontrib><creatorcontrib>Su, Jinzhan</creatorcontrib><creatorcontrib>Wang, Yiqing</creatorcontrib><creatorcontrib>Horváth, Zsolt E</creatorcontrib><creatorcontrib>Németh, Miklós</creatorcontrib><creatorcontrib>Czigány, Zsolt</creatorcontrib><creatorcontrib>Zámbó, Dániel</creatorcontrib><creatorcontrib>Pap, József Sándor</creatorcontrib><title>Photoelectrochemical water splitting by hematite boosted in a heterojunction with B-doped g-CN nanosheets and carbon nanotubes</title><title>Journal of materials chemistry. A, Materials for energy and sustainability</title><description>Here, we effectively layered economically viable pyrolytic carbon nanotubes (p-CNTs) as solid-state mediators to accelerate the charge carrier transfer between hematite (α-Fe
2
O
3
) and boron-doped graphitic carbon nitride (B-C
3
N
4
). This synergistic combination leads to higher photoelectrochemical water splitting performance with a photoanodic current density of 2.85 mA cm
−2
, which is a 4.1-fold enhancement compared to pristine α-Fe
2
O
3
and the O
2
evolution rate detected was 22.70 μmol h
−1
cm
−2
with a Faraday efficiency of ∼98% at 1.7 V
RHE
. Mott-Schottky analysis confirms the highest donor density of 55.7 × 10
19
cm
−3
for the α-Fe
2
O
3
/B-C
3
N
4
/p-CNT photoanode, compared to α-Fe
2
O
3
and α-Fe
2
O
3
/B-C
3
N
4
. Superstructuring the B-C
3
N
4
and p-CNT onto pristine α-Fe
2
O
3
enhances the charge separation and transfer efficiencies, and moreover mitigates recombination losses. DFT calculations suggest the type II charge transfer mechanism switched to an enhanced Z-scheme type by simple deposition of p-CNT on the α-Fe
2
O
3
/B-C
3
N
4
heterojunction. Achieving such cost-effective, highly efficient hematite-based photoanodes offers an opportunity to fabricate tandem photoelectrochemical devices for low-cost solar fuel production.
Enhanced PEC water splitting with an α-Fe
2
O
3
/B-C
3
N
4
type II heterojunction. Use of pyrolytic (p-)CNT to improve photoanodic current density. Improved electrical conductivity for facile charge separation & transfer. DFT hints at a Z-scheme mechanism.</description><issn>2050-7488</issn><issn>2050-7496</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><sourceid/><recordid>eNqFj71uwkAQhE9RIgUlNPSR9gVMzuYndhtERBVR0KP1ecGHzK11uwjR5Nm5SIiUmWZGM18zxoxyO87tpHpvpoq2mOUFPphBYWc2-5hW88d7LstnMxQ52KTS2nlVDczPumVl6shpZNfS0Tvs4IxKEaTvvKoPe6gvkCZUrwQ1syg14ANgahPIh1Nw6jnA2WsLn1nDfQL22eIbAgaWlkgFMDTgMNaJ-231VJO8mqcddkLDm7-Yt6_lZrHKorhtH_0R42X792vy334FfF1TJw</recordid><startdate>20240730</startdate><enddate>20240730</enddate><creator>Khan, Irfan</creator><creator>Benkó, Tímea</creator><creator>Horváth, Anita</creator><creator>Shen, Shaohua</creator><creator>Su, Jinzhan</creator><creator>Wang, Yiqing</creator><creator>Horváth, Zsolt E</creator><creator>Németh, Miklós</creator><creator>Czigány, Zsolt</creator><creator>Zámbó, Dániel</creator><creator>Pap, József Sándor</creator><scope/></search><sort><creationdate>20240730</creationdate><title>Photoelectrochemical water splitting by hematite boosted in a heterojunction with B-doped g-CN nanosheets and carbon nanotubes</title><author>Khan, Irfan ; Benkó, Tímea ; Horváth, Anita ; Shen, Shaohua ; Su, Jinzhan ; Wang, Yiqing ; Horváth, Zsolt E ; Németh, Miklós ; Czigány, Zsolt ; Zámbó, Dániel ; Pap, József Sándor</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-rsc_primary_d4ta02512a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><creationdate>2024</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Khan, Irfan</creatorcontrib><creatorcontrib>Benkó, Tímea</creatorcontrib><creatorcontrib>Horváth, Anita</creatorcontrib><creatorcontrib>Shen, Shaohua</creatorcontrib><creatorcontrib>Su, Jinzhan</creatorcontrib><creatorcontrib>Wang, Yiqing</creatorcontrib><creatorcontrib>Horváth, Zsolt E</creatorcontrib><creatorcontrib>Németh, Miklós</creatorcontrib><creatorcontrib>Czigány, Zsolt</creatorcontrib><creatorcontrib>Zámbó, Dániel</creatorcontrib><creatorcontrib>Pap, József Sándor</creatorcontrib><jtitle>Journal of materials chemistry. A, Materials for energy and sustainability</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Khan, Irfan</au><au>Benkó, Tímea</au><au>Horváth, Anita</au><au>Shen, Shaohua</au><au>Su, Jinzhan</au><au>Wang, Yiqing</au><au>Horváth, Zsolt E</au><au>Németh, Miklós</au><au>Czigány, Zsolt</au><au>Zámbó, Dániel</au><au>Pap, József Sándor</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Photoelectrochemical water splitting by hematite boosted in a heterojunction with B-doped g-CN nanosheets and carbon nanotubes</atitle><jtitle>Journal of materials chemistry. A, Materials for energy and sustainability</jtitle><date>2024-07-30</date><risdate>2024</risdate><volume>12</volume><issue>3</issue><spage>19247</spage><epage>19258</epage><pages>19247-19258</pages><issn>2050-7488</issn><eissn>2050-7496</eissn><abstract>Here, we effectively layered economically viable pyrolytic carbon nanotubes (p-CNTs) as solid-state mediators to accelerate the charge carrier transfer between hematite (α-Fe
2
O
3
) and boron-doped graphitic carbon nitride (B-C
3
N
4
). This synergistic combination leads to higher photoelectrochemical water splitting performance with a photoanodic current density of 2.85 mA cm
−2
, which is a 4.1-fold enhancement compared to pristine α-Fe
2
O
3
and the O
2
evolution rate detected was 22.70 μmol h
−1
cm
−2
with a Faraday efficiency of ∼98% at 1.7 V
RHE
. Mott-Schottky analysis confirms the highest donor density of 55.7 × 10
19
cm
−3
for the α-Fe
2
O
3
/B-C
3
N
4
/p-CNT photoanode, compared to α-Fe
2
O
3
and α-Fe
2
O
3
/B-C
3
N
4
. Superstructuring the B-C
3
N
4
and p-CNT onto pristine α-Fe
2
O
3
enhances the charge separation and transfer efficiencies, and moreover mitigates recombination losses. DFT calculations suggest the type II charge transfer mechanism switched to an enhanced Z-scheme type by simple deposition of p-CNT on the α-Fe
2
O
3
/B-C
3
N
4
heterojunction. Achieving such cost-effective, highly efficient hematite-based photoanodes offers an opportunity to fabricate tandem photoelectrochemical devices for low-cost solar fuel production.
Enhanced PEC water splitting with an α-Fe
2
O
3
/B-C
3
N
4
type II heterojunction. Use of pyrolytic (p-)CNT to improve photoanodic current density. Improved electrical conductivity for facile charge separation & transfer. DFT hints at a Z-scheme mechanism.</abstract><doi>10.1039/d4ta02512a</doi><tpages>12</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 2050-7488 |
| ispartof | Journal of materials chemistry. A, Materials for energy and sustainability, 2024-07, Vol.12 (3), p.19247-19258 |
| issn | 2050-7488 2050-7496 |
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| recordid | cdi_rsc_primary_d4ta02512a |
| source | Royal Society Of Chemistry Journals 2008- |
| title | Photoelectrochemical water splitting by hematite boosted in a heterojunction with B-doped g-CN nanosheets and carbon nanotubes |
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