Efficient photoelectrochemical water splitting of nanostructured hematite on a three-dimensional nanoporous metal electrode
We report great enhancement in photoelectrochemical water splitting efficiency of hematite assisted by fast and easy transfer of electrons/holes viaa 3D-nanoporous gold (3D-NG) electrode. 3D-nanostructured alpha -Fe sub(2)O sub(3)/NG electrodes were fabricated in three subsequent procedures, de-allo...
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| Veröffentlicht in: | Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2014-11, Vol.2 (41), p.17249-17252 |
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| container_issue | 41 |
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| container_title | Journal of materials chemistry. A, Materials for energy and sustainability |
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| creator | Bak, Chang Hong Kim, Kwanghyun Jung, Kyoungok Kim, Jin-Baek Jang, Ji-Hyun |
| description | We report great enhancement in photoelectrochemical water splitting efficiency of hematite assisted by fast and easy transfer of electrons/holes viaa 3D-nanoporous gold (3D-NG) electrode. 3D-nanostructured alpha -Fe sub(2)O sub(3)/NG electrodes were fabricated in three subsequent procedures, de-alloying Au/Ag to produce a conductive 3D-NG electrode, decorating nanocrystalline beta -FeOOH onto the nanopores of 3D-NG viaa hydrothermal method, and converting beta -FeOOH into alpha -Fe sub(2)O sub(3). alpha -Fe sub(2)O sub(3)/3D-NG exhibits a maximum photocurrent density of 1.6 mA cm super(-2) at 1.5 V vs.RHE under AM 1.5 G simulated sunlight illumination viaa photocatalytic hydrogen generation reaction, which is 2 times greater than that of the unmodified alpha -Fe sub(2)O sub(3) photoanode. Incident photon-to-electron conversion efficiency (IPCE) and electrochemical impedance spectroscopy (EIS) data confirm that alpha -Fe sub(2)O sub(3)/3D-NG suppresses electron-hole recombination. The excellent performance of nanostructured hematites on 3D-nanoporous metal electrodes makes them promising candidates as electrodes with maximum efficiency in water splitting. |
| doi_str_mv | 10.1039/C4TA03578J |
| format | Article |
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Incident photon-to-electron conversion efficiency (IPCE) and electrochemical impedance spectroscopy (EIS) data confirm that alpha -Fe sub(2)O sub(3)/3D-NG suppresses electron-hole recombination. The excellent performance of nanostructured hematites on 3D-nanoporous metal electrodes makes them promising candidates as electrodes with maximum efficiency in water splitting.</description><identifier>ISSN: 2050-7488</identifier><identifier>EISSN: 2050-7496</identifier><identifier>DOI: 10.1039/C4TA03578J</identifier><language>eng</language><subject>Density ; Electrochemical impedance spectroscopy ; Electrodes ; Gold ; Hematite ; Nanostructure ; Three dimensional ; Water splitting</subject><ispartof>Journal of materials chemistry. 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A, Materials for energy and sustainability</title><description>We report great enhancement in photoelectrochemical water splitting efficiency of hematite assisted by fast and easy transfer of electrons/holes viaa 3D-nanoporous gold (3D-NG) electrode. 3D-nanostructured alpha -Fe sub(2)O sub(3)/NG electrodes were fabricated in three subsequent procedures, de-alloying Au/Ag to produce a conductive 3D-NG electrode, decorating nanocrystalline beta -FeOOH onto the nanopores of 3D-NG viaa hydrothermal method, and converting beta -FeOOH into alpha -Fe sub(2)O sub(3). alpha -Fe sub(2)O sub(3)/3D-NG exhibits a maximum photocurrent density of 1.6 mA cm super(-2) at 1.5 V vs.RHE under AM 1.5 G simulated sunlight illumination viaa photocatalytic hydrogen generation reaction, which is 2 times greater than that of the unmodified alpha -Fe sub(2)O sub(3) photoanode. Incident photon-to-electron conversion efficiency (IPCE) and electrochemical impedance spectroscopy (EIS) data confirm that alpha -Fe sub(2)O sub(3)/3D-NG suppresses electron-hole recombination. The excellent performance of nanostructured hematites on 3D-nanoporous metal electrodes makes them promising candidates as electrodes with maximum efficiency in water splitting.</description><subject>Density</subject><subject>Electrochemical impedance spectroscopy</subject><subject>Electrodes</subject><subject>Gold</subject><subject>Hematite</subject><subject>Nanostructure</subject><subject>Three dimensional</subject><subject>Water splitting</subject><issn>2050-7488</issn><issn>2050-7496</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNpFkE9LAzEQxYMoWGovfoIcRVjNJrvZ5FhK_UfBSz0vaTKxkd1kTbKI-OXd0qJzmWH48d7jIXRdkruSMHm_qrZLwupGvJyhGSU1KZpK8vO_W4hLtEjpg0wjCOFSztDP2lqnHfiMh33IATrQOQa9h95p1eEvlSHiNHQuZ-ffcbDYKx9SjqPOYwSDJ1JllwEHjxXO-whQGNeDTy74SeGADyGGMeEe8vQ4WRi4QhdWdQkWpz1Hbw_r7eqp2Lw-Pq-Wm0IzUuZC1UKTqjFAmdS8troBJgQ1Oygb4FJrw4xiVFm-05bWXICUO044MBCssTWbo5uj7hDD5wgpt71LGrpOeZhitSWnklVE0mpCb4-ojiGlCLYdoutV_G5L0h5Kbv9LZr9Q8HLT</recordid><startdate>20141107</startdate><enddate>20141107</enddate><creator>Bak, Chang Hong</creator><creator>Kim, Kwanghyun</creator><creator>Jung, Kyoungok</creator><creator>Kim, Jin-Baek</creator><creator>Jang, Ji-Hyun</creator><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20141107</creationdate><title>Efficient photoelectrochemical water splitting of nanostructured hematite on a three-dimensional nanoporous metal electrode</title><author>Bak, Chang Hong ; Kim, Kwanghyun ; Jung, Kyoungok ; Kim, Jin-Baek ; Jang, Ji-Hyun</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c301t-a58c047de239c65fc7e3882dbe17e69ccd3da32af6bcf2568e99b606e3e837f53</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Density</topic><topic>Electrochemical impedance spectroscopy</topic><topic>Electrodes</topic><topic>Gold</topic><topic>Hematite</topic><topic>Nanostructure</topic><topic>Three dimensional</topic><topic>Water splitting</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Bak, Chang Hong</creatorcontrib><creatorcontrib>Kim, Kwanghyun</creatorcontrib><creatorcontrib>Jung, Kyoungok</creatorcontrib><creatorcontrib>Kim, Jin-Baek</creatorcontrib><creatorcontrib>Jang, Ji-Hyun</creatorcontrib><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</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><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>Bak, Chang Hong</au><au>Kim, Kwanghyun</au><au>Jung, Kyoungok</au><au>Kim, Jin-Baek</au><au>Jang, Ji-Hyun</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Efficient photoelectrochemical water splitting of nanostructured hematite on a three-dimensional nanoporous metal electrode</atitle><jtitle>Journal of materials chemistry. A, Materials for energy and sustainability</jtitle><date>2014-11-07</date><risdate>2014</risdate><volume>2</volume><issue>41</issue><spage>17249</spage><epage>17252</epage><pages>17249-17252</pages><issn>2050-7488</issn><eissn>2050-7496</eissn><abstract>We report great enhancement in photoelectrochemical water splitting efficiency of hematite assisted by fast and easy transfer of electrons/holes viaa 3D-nanoporous gold (3D-NG) electrode. 3D-nanostructured alpha -Fe sub(2)O sub(3)/NG electrodes were fabricated in three subsequent procedures, de-alloying Au/Ag to produce a conductive 3D-NG electrode, decorating nanocrystalline beta -FeOOH onto the nanopores of 3D-NG viaa hydrothermal method, and converting beta -FeOOH into alpha -Fe sub(2)O sub(3). alpha -Fe sub(2)O sub(3)/3D-NG exhibits a maximum photocurrent density of 1.6 mA cm super(-2) at 1.5 V vs.RHE under AM 1.5 G simulated sunlight illumination viaa photocatalytic hydrogen generation reaction, which is 2 times greater than that of the unmodified alpha -Fe sub(2)O sub(3) photoanode. Incident photon-to-electron conversion efficiency (IPCE) and electrochemical impedance spectroscopy (EIS) data confirm that alpha -Fe sub(2)O sub(3)/3D-NG suppresses electron-hole recombination. The excellent performance of nanostructured hematites on 3D-nanoporous metal electrodes makes them promising candidates as electrodes with maximum efficiency in water splitting.</abstract><doi>10.1039/C4TA03578J</doi><tpages>4</tpages></addata></record> |
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| ispartof | Journal of materials chemistry. A, Materials for energy and sustainability, 2014-11, Vol.2 (41), p.17249-17252 |
| issn | 2050-7488 2050-7496 |
| language | eng |
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| source | Royal Society Of Chemistry Journals 2008-; Alma/SFX Local Collection |
| subjects | Density Electrochemical impedance spectroscopy Electrodes Gold Hematite Nanostructure Three dimensional Water splitting |
| title | Efficient photoelectrochemical water splitting of nanostructured hematite on a three-dimensional nanoporous metal electrode |
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