Solution Process–Based Facile Flame–Boosted Low‐Valence Transition Metal Doping on Pristine Oxide for Highly Enhanced Photoelectrochemical Solar Water Oxidation Reaction
ABSTRACT As for the high sustainable solar hydrogen production via water splitting, transition metal doping on an oxide photoanode in photoelectrochemical (PEC) cells has been recognized as an effective approach. However, conventional thermal‐diffusion‐mediated doping strategies face the challenge o...
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Wiley
2025-02-01
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| Online Access: | https://doi.org/10.1002/sus2.253 |
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| author | Seung Hun Roh Eujin Kwak Won Tae Hong Chengkai Xia Sungsoon Kim Heeyeop Chae Xu Yu Wooseok Yang Jongwook Park Jung Kyu Kim |
| author_facet | Seung Hun Roh Eujin Kwak Won Tae Hong Chengkai Xia Sungsoon Kim Heeyeop Chae Xu Yu Wooseok Yang Jongwook Park Jung Kyu Kim |
| author_sort | Seung Hun Roh |
| collection | DOAJ |
| description | ABSTRACT As for the high sustainable solar hydrogen production via water splitting, transition metal doping on an oxide photoanode in photoelectrochemical (PEC) cells has been recognized as an effective approach. However, conventional thermal‐diffusion‐mediated doping strategies face the challenge of resolving sluggish catalytic kinetics for oxygen evolution reaction (OER) and its practical utilization for the synthesis of photoanode films. Herein, we introduce facile ultrafast flame‐boosted doping of Mo into a BiVO4 (FL MoBVO) film for 20 s to achieve an efficient PEC OER. Mo elements in a low‐valence state (i.e., Mo6−δ) and Mo6+ are successfully doped into the photoanode, which manipulate the energy band structure, facilitating the downward shift of band edges and promoting the surface catalytic kinetics. Consequently, the flame‐boosted Mo‐doping results in superior PEC performance in a mild environment with neutral electrolyte without introducing any other additives or co‐catalysts, where the photocurrent density at 1.23 VRHE under 1 sun illumination in pH 7 is outstandingly enhanced, over 9‐fold higher than that of a pristine BiVO4. The flame‐boosted doping induces significantly enhanced photoexcited charge transport and catalytic reaction kinetics performances simultaneously. Our report provides the effective strategy boosting both the thermodynamic and kinetic charge migration properties for sustainable materials. |
| format | Article |
| id | doaj-art-7f68744d801642b8b2682e95614055b9 |
| institution | OA Journals |
| issn | 2692-4552 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Wiley |
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| spelling | doaj-art-7f68744d801642b8b2682e95614055b92025-08-20T02:14:46ZengWileySusMat2692-45522025-02-0151n/an/a10.1002/sus2.253Solution Process–Based Facile Flame–Boosted Low‐Valence Transition Metal Doping on Pristine Oxide for Highly Enhanced Photoelectrochemical Solar Water Oxidation ReactionSeung Hun Roh0Eujin Kwak1Won Tae Hong2Chengkai Xia3Sungsoon Kim4Heeyeop Chae5Xu Yu6Wooseok Yang7Jongwook Park8Jung Kyu Kim9School of Chemical EngineeringSungkyunkwan University (SKKU)Suwon Republic of KoreaSchool of Chemical EngineeringSungkyunkwan University (SKKU)Suwon Republic of KoreaSchool of Chemical EngineeringSungkyunkwan University (SKKU)Suwon Republic of KoreaSchool of Materials Science and EngineeringNorth University of ChinaTaiyuan Shanxi ChinaDepartment of Mechanical EngineeringStanford UniversityStanford California USASchool of Chemical EngineeringSungkyunkwan University (SKKU)Suwon Republic of KoreaSchool of Chemistry and Chemical EngineeringYangzhou UniversityYangzhou ChinaSchool of Chemical EngineeringSungkyunkwan University (SKKU)Suwon Republic of KoreaIntegrated EngineeringDepartment of Chemical EngineeringKyung Hee UniversityGyeonggi South KoreaSchool of Chemical EngineeringSungkyunkwan University (SKKU)Suwon Republic of KoreaABSTRACT As for the high sustainable solar hydrogen production via water splitting, transition metal doping on an oxide photoanode in photoelectrochemical (PEC) cells has been recognized as an effective approach. However, conventional thermal‐diffusion‐mediated doping strategies face the challenge of resolving sluggish catalytic kinetics for oxygen evolution reaction (OER) and its practical utilization for the synthesis of photoanode films. Herein, we introduce facile ultrafast flame‐boosted doping of Mo into a BiVO4 (FL MoBVO) film for 20 s to achieve an efficient PEC OER. Mo elements in a low‐valence state (i.e., Mo6−δ) and Mo6+ are successfully doped into the photoanode, which manipulate the energy band structure, facilitating the downward shift of band edges and promoting the surface catalytic kinetics. Consequently, the flame‐boosted Mo‐doping results in superior PEC performance in a mild environment with neutral electrolyte without introducing any other additives or co‐catalysts, where the photocurrent density at 1.23 VRHE under 1 sun illumination in pH 7 is outstandingly enhanced, over 9‐fold higher than that of a pristine BiVO4. The flame‐boosted doping induces significantly enhanced photoexcited charge transport and catalytic reaction kinetics performances simultaneously. Our report provides the effective strategy boosting both the thermodynamic and kinetic charge migration properties for sustainable materials.https://doi.org/10.1002/sus2.253flame processoxygen evolution reactionphotoelectrochemical water splittingtransition metal doping |
| spellingShingle | Seung Hun Roh Eujin Kwak Won Tae Hong Chengkai Xia Sungsoon Kim Heeyeop Chae Xu Yu Wooseok Yang Jongwook Park Jung Kyu Kim Solution Process–Based Facile Flame–Boosted Low‐Valence Transition Metal Doping on Pristine Oxide for Highly Enhanced Photoelectrochemical Solar Water Oxidation Reaction SusMat flame process oxygen evolution reaction photoelectrochemical water splitting transition metal doping |
| title | Solution Process–Based Facile Flame–Boosted Low‐Valence Transition Metal Doping on Pristine Oxide for Highly Enhanced Photoelectrochemical Solar Water Oxidation Reaction |
| title_full | Solution Process–Based Facile Flame–Boosted Low‐Valence Transition Metal Doping on Pristine Oxide for Highly Enhanced Photoelectrochemical Solar Water Oxidation Reaction |
| title_fullStr | Solution Process–Based Facile Flame–Boosted Low‐Valence Transition Metal Doping on Pristine Oxide for Highly Enhanced Photoelectrochemical Solar Water Oxidation Reaction |
| title_full_unstemmed | Solution Process–Based Facile Flame–Boosted Low‐Valence Transition Metal Doping on Pristine Oxide for Highly Enhanced Photoelectrochemical Solar Water Oxidation Reaction |
| title_short | Solution Process–Based Facile Flame–Boosted Low‐Valence Transition Metal Doping on Pristine Oxide for Highly Enhanced Photoelectrochemical Solar Water Oxidation Reaction |
| title_sort | solution process based facile flame boosted low valence transition metal doping on pristine oxide for highly enhanced photoelectrochemical solar water oxidation reaction |
| topic | flame process oxygen evolution reaction photoelectrochemical water splitting transition metal doping |
| url | https://doi.org/10.1002/sus2.253 |
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