Edge‐Sharing Octahedrally Coordinated NiFe Dual Active Sites on ZnFe2O4 for Photoelectrochemical Water Oxidation
Abstract The structural properties of octahedral sites (BOh) in spinel oxides (AB2O4) play vital roles in the electrochemical performance of oxygen‐related reactions. However, the precise manipulation of AB2O4 remains challenging due to the complexity of their crystal structure. Here, a simple and v...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2023-08-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202301869 |
| _version_ | 1797754796444221440 |
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| author | Zhiyong Jiang Xiaodi Zhu Zhiyu Wang Wei Liu Wensheng Yan Kevin Sivula Jun Bao |
| author_facet | Zhiyong Jiang Xiaodi Zhu Zhiyu Wang Wei Liu Wensheng Yan Kevin Sivula Jun Bao |
| author_sort | Zhiyong Jiang |
| collection | DOAJ |
| description | Abstract The structural properties of octahedral sites (BOh) in spinel oxides (AB2O4) play vital roles in the electrochemical performance of oxygen‐related reactions. However, the precise manipulation of AB2O4 remains challenging due to the complexity of their crystal structure. Here, a simple and versatile molten‐salt‐mediated strategy is reported to introduce Ni2+ in Boh sites intentionally on the surface of zinc ferrite (ZnFe2O4, ZFO) to promote the active sites for photoelectrochemical (PEC) water splitting. The as‐created photoanode (ZFO‐MSNi) shows a remarkable cathodic shift of ≈ 450 mV (turn‐on voltage of ≈ 0.6 VRHE) as well as three times the 1‐sun photocurrent density at 1.23 VRHE for PEC water oxidation in comparison with bare ZFO. A comprehensive structural characterization clearly reveals the local structure of the introduced Ni2+ in ZFO‐MSNi. Fewer surface trapping states are observed while the precisely introduced Ni2+ and associated neighboring Fe(3‐σ)+ (0<σ<1) sites unite in an edge‐sharing octahedral configuration to function as NiFe dual active sites for PEC water oxidation. Moreover, open circuit potential measurements and rapid‐scan voltammetry investigation give further insight into the enhanced PEC performance. Overall, this work displays a versatile strategy to regulate the surface active sites of photoelectrodes for increasing performance in PEC solar energy conversion systems. |
| first_indexed | 2024-03-12T17:37:33Z |
| format | Article |
| id | doaj.art-4a60240f733a44e8b264d797a04526c2 |
| institution | Directory Open Access Journal |
| issn | 2198-3844 |
| language | English |
| last_indexed | 2024-03-12T17:37:33Z |
| publishDate | 2023-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj.art-4a60240f733a44e8b264d797a04526c22023-08-04T07:49:49ZengWileyAdvanced Science2198-38442023-08-011022n/an/a10.1002/advs.202301869Edge‐Sharing Octahedrally Coordinated NiFe Dual Active Sites on ZnFe2O4 for Photoelectrochemical Water OxidationZhiyong Jiang0Xiaodi Zhu1Zhiyu Wang2Wei Liu3Wensheng Yan4Kevin Sivula5Jun Bao6National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui 230029 ChinaNational Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui 230029 ChinaNational Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui 230029 ChinaState Key Laboratory of Fine Chemicals School of Chemical Engineering Dalian University of Technology Dalian 116024 ChinaNational Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui 230029 ChinaLaboratory for Molecular Engineering of Optoelectronic Nanomaterials (LIMNO) École Polytechnique Fédérale de Lausanne Station 6 Lausanne 1015 SwitzerlandNational Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui 230029 ChinaAbstract The structural properties of octahedral sites (BOh) in spinel oxides (AB2O4) play vital roles in the electrochemical performance of oxygen‐related reactions. However, the precise manipulation of AB2O4 remains challenging due to the complexity of their crystal structure. Here, a simple and versatile molten‐salt‐mediated strategy is reported to introduce Ni2+ in Boh sites intentionally on the surface of zinc ferrite (ZnFe2O4, ZFO) to promote the active sites for photoelectrochemical (PEC) water splitting. The as‐created photoanode (ZFO‐MSNi) shows a remarkable cathodic shift of ≈ 450 mV (turn‐on voltage of ≈ 0.6 VRHE) as well as three times the 1‐sun photocurrent density at 1.23 VRHE for PEC water oxidation in comparison with bare ZFO. A comprehensive structural characterization clearly reveals the local structure of the introduced Ni2+ in ZFO‐MSNi. Fewer surface trapping states are observed while the precisely introduced Ni2+ and associated neighboring Fe(3‐σ)+ (0<σ<1) sites unite in an edge‐sharing octahedral configuration to function as NiFe dual active sites for PEC water oxidation. Moreover, open circuit potential measurements and rapid‐scan voltammetry investigation give further insight into the enhanced PEC performance. Overall, this work displays a versatile strategy to regulate the surface active sites of photoelectrodes for increasing performance in PEC solar energy conversion systems.https://doi.org/10.1002/advs.202301869dual active sitesmolten saltspinel ferritesultra‐low onset potentialwater splitting |
| spellingShingle | Zhiyong Jiang Xiaodi Zhu Zhiyu Wang Wei Liu Wensheng Yan Kevin Sivula Jun Bao Edge‐Sharing Octahedrally Coordinated NiFe Dual Active Sites on ZnFe2O4 for Photoelectrochemical Water Oxidation Advanced Science dual active sites molten salt spinel ferrites ultra‐low onset potential water splitting |
| title | Edge‐Sharing Octahedrally Coordinated NiFe Dual Active Sites on ZnFe2O4 for Photoelectrochemical Water Oxidation |
| title_full | Edge‐Sharing Octahedrally Coordinated NiFe Dual Active Sites on ZnFe2O4 for Photoelectrochemical Water Oxidation |
| title_fullStr | Edge‐Sharing Octahedrally Coordinated NiFe Dual Active Sites on ZnFe2O4 for Photoelectrochemical Water Oxidation |
| title_full_unstemmed | Edge‐Sharing Octahedrally Coordinated NiFe Dual Active Sites on ZnFe2O4 for Photoelectrochemical Water Oxidation |
| title_short | Edge‐Sharing Octahedrally Coordinated NiFe Dual Active Sites on ZnFe2O4 for Photoelectrochemical Water Oxidation |
| title_sort | edge sharing octahedrally coordinated nife dual active sites on znfe2o4 for photoelectrochemical water oxidation |
| topic | dual active sites molten salt spinel ferrites ultra‐low onset potential water splitting |
| url | https://doi.org/10.1002/advs.202301869 |
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