Highly porous single-phase rhombohedral CrxRh2−xO3 nanofibers expediting oxygen evolution reaction
Single-phase rhombohedral CrxRh2−xO3 nanofibers are demonstrated as an excellent and stable electrocatalyst for oxygen evolution reaction (OER) under alkaline condition. Facile optimization of the annealing temperature for electrospun nanofibers composed of Cr/Rh metal precursors and poly(vinylpyrro...
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| Language: | English |
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Elsevier
2025-08-01
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| Series: | Applied Surface Science Advances |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666523925000972 |
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| author | Taehui Kwon Kyungmin Kim Sampath Prabhakaran Subin Choi Jiwon Kim Yeji Yim Jihyun Park Hoi Ri Moon Myung Hwa Kim Do Hwan Kim Youngmi Lee |
| author_facet | Taehui Kwon Kyungmin Kim Sampath Prabhakaran Subin Choi Jiwon Kim Yeji Yim Jihyun Park Hoi Ri Moon Myung Hwa Kim Do Hwan Kim Youngmi Lee |
| author_sort | Taehui Kwon |
| collection | DOAJ |
| description | Single-phase rhombohedral CrxRh2−xO3 nanofibers are demonstrated as an excellent and stable electrocatalyst for oxygen evolution reaction (OER) under alkaline condition. Facile optimization of the annealing temperature for electrospun nanofibers composed of Cr/Rh metal precursors and poly(vinylpyrrolidone) could produce highly porous nanofibers of single-phase CrxRh2−xO3 by randomly distributing two metal ions of Cr3+ and Rh3+ in the rhombohedral crystalline lattice sites. Single-phase CrxRh2−xO3 could then induce the best synergistic effect of Cr and Rh owing to the perturbation of the surface electronic structure of the electrocatalyst active site and much enlarged electroactive surface area. Density functional theory (DFT) simulation integrated with experimental data indicated that the increased activity was due to moderate d-band center energy levels. This regulates oxygen desorption and adsorption capacities in the intermediates (*OH, *O, and *OOH). Conclusively, CrxRh2−xO3 nanofibers exhibited superior OER catalytic performances (low overpotential and Tafel slope with high stability and easy product desorption) compared to other Rh-related catalysts reported to date. |
| format | Article |
| id | doaj-art-8eb7e56145df4148962ca81e5d9af985 |
| institution | Kabale University |
| issn | 2666-5239 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Applied Surface Science Advances |
| spelling | doaj-art-8eb7e56145df4148962ca81e5d9af9852025-08-20T04:01:48ZengElsevierApplied Surface Science Advances2666-52392025-08-012810078910.1016/j.apsadv.2025.100789Highly porous single-phase rhombohedral CrxRh2−xO3 nanofibers expediting oxygen evolution reactionTaehui Kwon0Kyungmin Kim1Sampath Prabhakaran2Subin Choi3Jiwon Kim4Yeji Yim5Jihyun Park6Hoi Ri Moon7Myung Hwa Kim8Do Hwan Kim9Youngmi Lee10Department of Chemistry & Nanoscience, Ewha Womans University, Seoul, 03760, Republic of KoreaDepartment of Chemistry & Nanoscience, Ewha Womans University, Seoul, 03760, Republic of KoreaDivision of Science Education, Institute of Fusion Science, Graduate School of Department of Energy Storage/Energy Conversion Engineering, Jeonbuk National University, Jeonbuk, 54896, Republic of KoreaDepartment of Chemistry & Nanoscience, Ewha Womans University, Seoul, 03760, Republic of KoreaDepartment of Chemistry & Nanoscience, Ewha Womans University, Seoul, 03760, Republic of KoreaDepartment of Chemistry & Nanoscience, Ewha Womans University, Seoul, 03760, Republic of KoreaDepartment of Chemistry, Ulsan National Insititute of Science and Technology (UNIST), Ulsan, 44919, Republic of KoreaDepartment of Chemistry & Nanoscience, Ewha Womans University, Seoul, 03760, Republic of KoreaDepartment of Chemistry & Nanoscience, Ewha Womans University, Seoul, 03760, Republic of Korea; Corresponding authors.Division of Science Education, Institute of Fusion Science, Graduate School of Department of Energy Storage/Energy Conversion Engineering, Jeonbuk National University, Jeonbuk, 54896, Republic of Korea; Corresponding authors.Department of Chemistry & Nanoscience, Ewha Womans University, Seoul, 03760, Republic of Korea; Corresponding authors.Single-phase rhombohedral CrxRh2−xO3 nanofibers are demonstrated as an excellent and stable electrocatalyst for oxygen evolution reaction (OER) under alkaline condition. Facile optimization of the annealing temperature for electrospun nanofibers composed of Cr/Rh metal precursors and poly(vinylpyrrolidone) could produce highly porous nanofibers of single-phase CrxRh2−xO3 by randomly distributing two metal ions of Cr3+ and Rh3+ in the rhombohedral crystalline lattice sites. Single-phase CrxRh2−xO3 could then induce the best synergistic effect of Cr and Rh owing to the perturbation of the surface electronic structure of the electrocatalyst active site and much enlarged electroactive surface area. Density functional theory (DFT) simulation integrated with experimental data indicated that the increased activity was due to moderate d-band center energy levels. This regulates oxygen desorption and adsorption capacities in the intermediates (*OH, *O, and *OOH). Conclusively, CrxRh2−xO3 nanofibers exhibited superior OER catalytic performances (low overpotential and Tafel slope with high stability and easy product desorption) compared to other Rh-related catalysts reported to date.http://www.sciencedirect.com/science/article/pii/S2666523925000972Rhombohedral CoRhO3Oxygen evolution reaction (OER)ElectrospinningNanofiberDensity functional theory (DFT) simulation |
| spellingShingle | Taehui Kwon Kyungmin Kim Sampath Prabhakaran Subin Choi Jiwon Kim Yeji Yim Jihyun Park Hoi Ri Moon Myung Hwa Kim Do Hwan Kim Youngmi Lee Highly porous single-phase rhombohedral CrxRh2−xO3 nanofibers expediting oxygen evolution reaction Applied Surface Science Advances Rhombohedral CoRhO3 Oxygen evolution reaction (OER) Electrospinning Nanofiber Density functional theory (DFT) simulation |
| title | Highly porous single-phase rhombohedral CrxRh2−xO3 nanofibers expediting oxygen evolution reaction |
| title_full | Highly porous single-phase rhombohedral CrxRh2−xO3 nanofibers expediting oxygen evolution reaction |
| title_fullStr | Highly porous single-phase rhombohedral CrxRh2−xO3 nanofibers expediting oxygen evolution reaction |
| title_full_unstemmed | Highly porous single-phase rhombohedral CrxRh2−xO3 nanofibers expediting oxygen evolution reaction |
| title_short | Highly porous single-phase rhombohedral CrxRh2−xO3 nanofibers expediting oxygen evolution reaction |
| title_sort | highly porous single phase rhombohedral crxrh2 xo3 nanofibers expediting oxygen evolution reaction |
| topic | Rhombohedral CoRhO3 Oxygen evolution reaction (OER) Electrospinning Nanofiber Density functional theory (DFT) simulation |
| url | http://www.sciencedirect.com/science/article/pii/S2666523925000972 |
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