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Synergistic Catalysis of SnO(2)/Reduced Graphene Oxide for VO(2+)/VO(2)(+) and V(2+)/V(3+) Redox Reactions
In spite of their low cost, high activity, and diversity, metal oxide catalysts have not been widely applied in vanadium redox reactions due to their poor conductivity and low surface area. Herein, SnO(2)/reduced graphene oxide (SnO(2)/rGO) composite was prepared by a sol–gel method followed by high...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8401850/ https://www.ncbi.nlm.nih.gov/pubmed/34443673 http://dx.doi.org/10.3390/molecules26165085 |
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author | Liu, Yongguang Jiang, Yingqiao Lv, Yanrong He, Zhangxing Dai, Lei Wang, Ling |
author_facet | Liu, Yongguang Jiang, Yingqiao Lv, Yanrong He, Zhangxing Dai, Lei Wang, Ling |
author_sort | Liu, Yongguang |
collection | PubMed |
description | In spite of their low cost, high activity, and diversity, metal oxide catalysts have not been widely applied in vanadium redox reactions due to their poor conductivity and low surface area. Herein, SnO(2)/reduced graphene oxide (SnO(2)/rGO) composite was prepared by a sol–gel method followed by high-temperature carbonization. SnO(2)/rGO shows better electrochemical catalysis for both redox reactions of VO(2+)/VO(2)(+) and V(2+)/V(3+) couples as compared to SnO(2) and graphene oxide. This is attributed to the fact that reduced graphene oxide is employed as carbon support featuring excellent conductivity and a large surface area, which offers fast electron transfer and a large reaction place towards vanadium redox reaction. Moreover, SnO(2) has excellent electrochemical activity and wettability, which also boost the electrochemical kinetics of redox reaction. In brief, the electrochemical properties for vanadium redox reactions are boosted in terms of diffusion, charge transfer, and electron transport processes systematically. Next, SnO(2)/rGO can increase the energy storage performance of cells, including higher discharge electrolyte utilization and lower electrochemical polarization. At 150 mA cm(−2), the energy efficiency of a modified cell is 69.8%, which is increased by 5.7% compared with a pristine one. This work provides a promising method to develop composite catalysts of carbon materials and metal oxide for vanadium redox reactions. |
format | Online Article Text |
id | pubmed-8401850 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-84018502021-08-29 Synergistic Catalysis of SnO(2)/Reduced Graphene Oxide for VO(2+)/VO(2)(+) and V(2+)/V(3+) Redox Reactions Liu, Yongguang Jiang, Yingqiao Lv, Yanrong He, Zhangxing Dai, Lei Wang, Ling Molecules Article In spite of their low cost, high activity, and diversity, metal oxide catalysts have not been widely applied in vanadium redox reactions due to their poor conductivity and low surface area. Herein, SnO(2)/reduced graphene oxide (SnO(2)/rGO) composite was prepared by a sol–gel method followed by high-temperature carbonization. SnO(2)/rGO shows better electrochemical catalysis for both redox reactions of VO(2+)/VO(2)(+) and V(2+)/V(3+) couples as compared to SnO(2) and graphene oxide. This is attributed to the fact that reduced graphene oxide is employed as carbon support featuring excellent conductivity and a large surface area, which offers fast electron transfer and a large reaction place towards vanadium redox reaction. Moreover, SnO(2) has excellent electrochemical activity and wettability, which also boost the electrochemical kinetics of redox reaction. In brief, the electrochemical properties for vanadium redox reactions are boosted in terms of diffusion, charge transfer, and electron transport processes systematically. Next, SnO(2)/rGO can increase the energy storage performance of cells, including higher discharge electrolyte utilization and lower electrochemical polarization. At 150 mA cm(−2), the energy efficiency of a modified cell is 69.8%, which is increased by 5.7% compared with a pristine one. This work provides a promising method to develop composite catalysts of carbon materials and metal oxide for vanadium redox reactions. MDPI 2021-08-22 /pmc/articles/PMC8401850/ /pubmed/34443673 http://dx.doi.org/10.3390/molecules26165085 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Liu, Yongguang Jiang, Yingqiao Lv, Yanrong He, Zhangxing Dai, Lei Wang, Ling Synergistic Catalysis of SnO(2)/Reduced Graphene Oxide for VO(2+)/VO(2)(+) and V(2+)/V(3+) Redox Reactions |
title | Synergistic Catalysis of SnO(2)/Reduced Graphene Oxide for VO(2+)/VO(2)(+) and V(2+)/V(3+) Redox Reactions |
title_full | Synergistic Catalysis of SnO(2)/Reduced Graphene Oxide for VO(2+)/VO(2)(+) and V(2+)/V(3+) Redox Reactions |
title_fullStr | Synergistic Catalysis of SnO(2)/Reduced Graphene Oxide for VO(2+)/VO(2)(+) and V(2+)/V(3+) Redox Reactions |
title_full_unstemmed | Synergistic Catalysis of SnO(2)/Reduced Graphene Oxide for VO(2+)/VO(2)(+) and V(2+)/V(3+) Redox Reactions |
title_short | Synergistic Catalysis of SnO(2)/Reduced Graphene Oxide for VO(2+)/VO(2)(+) and V(2+)/V(3+) Redox Reactions |
title_sort | synergistic catalysis of sno(2)/reduced graphene oxide for vo(2+)/vo(2)(+) and v(2+)/v(3+) redox reactions |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8401850/ https://www.ncbi.nlm.nih.gov/pubmed/34443673 http://dx.doi.org/10.3390/molecules26165085 |
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