Sm<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>1−x</sub>Ni<sub>x</sub>O<sub>3−δ</sub>—A Novel Bifunctional Electrocatalyst for Oxygen Reduction/Evolution Reactions
The development of non-precious metal catalysts with excellent bifunctional activities is significant for air–metal batteries. ABO<sub>3</sub>-type perovskite oxides can improve their catalytic activity and electronic conductivity by doping transition metal elements at B sites. Here, we...
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MDPI AG
2022-02-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/27/4/1263 |
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| author | Xingmei Liu Yuwei Wang Liquan Fan Weichao Zhang Weiyan Cao Xianxin Han Xijun Liu Hongge Jia |
| author_facet | Xingmei Liu Yuwei Wang Liquan Fan Weichao Zhang Weiyan Cao Xianxin Han Xijun Liu Hongge Jia |
| author_sort | Xingmei Liu |
| collection | DOAJ |
| description | The development of non-precious metal catalysts with excellent bifunctional activities is significant for air–metal batteries. ABO<sub>3</sub>-type perovskite oxides can improve their catalytic activity and electronic conductivity by doping transition metal elements at B sites. Here, we develop a novel Sm<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>1−x</sub>Ni<sub>x</sub>O<sub>3−δ</sub> (SSCN) nanofiber-structured electrocatalyst. In 0.1 M KOH electrolyte solution, Sm<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>0.8</sub>Ni<sub>0.2</sub>O<sub>3−δ</sub> (SSCN82) with the optimal Co: Ni molar ratio exhibits good electrocatalytic activity for OER/ORR, affording a low onset potential of 1.39 V, a slight Tafel slope of 123.8 mV dec<sup>−1</sup>, and a current density of 6.01 mA cm<sup>−2</sup> at 1.8 V, and the ORR reaction process was four-electron reaction pathway. Combining the morphological characteristic of SSCN nanofibers with the synergistic effect of cobalt and nickel with a suitable molar ratio is beneficial to improving the catalytic activity of SSCN perovskite oxides. SSCN82 exhibits good bi-functional catalytic performance and electrochemical double-layer capacitance. |
| first_indexed | 2024-03-09T21:20:38Z |
| format | Article |
| id | doaj.art-3ccfd3d0acb842bb9a356eaf17943cd3 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-09T21:20:38Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-3ccfd3d0acb842bb9a356eaf17943cd32023-11-23T21:21:16ZengMDPI AGMolecules1420-30492022-02-01274126310.3390/molecules27041263Sm<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>1−x</sub>Ni<sub>x</sub>O<sub>3−δ</sub>—A Novel Bifunctional Electrocatalyst for Oxygen Reduction/Evolution ReactionsXingmei Liu0Yuwei Wang1Liquan Fan2Weichao Zhang3Weiyan Cao4Xianxin Han5Xijun Liu6Hongge Jia7Heilongjiang Provincial Key Laboratory of Polymeric Composite Materials, College of Materials Science and Engineering, Qiqihar University, Qiqihar 161006, ChinaHeilongjiang Provincial Key Laboratory of Polymeric Composite Materials, College of Materials Science and Engineering, Qiqihar University, Qiqihar 161006, ChinaHeilongjiang Provincial Key Laboratory of Polymeric Composite Materials, College of Materials Science and Engineering, Qiqihar University, Qiqihar 161006, ChinaHeilongjiang Provincial Key Laboratory of Polymeric Composite Materials, College of Materials Science and Engineering, Qiqihar University, Qiqihar 161006, ChinaHeilongjiang Provincial Key Laboratory of Polymeric Composite Materials, College of Materials Science and Engineering, Qiqihar University, Qiqihar 161006, ChinaHeilongjiang Provincial Key Laboratory of Polymeric Composite Materials, College of Materials Science and Engineering, Qiqihar University, Qiqihar 161006, ChinaHeilongjiang Provincial Key Laboratory of Polymeric Composite Materials, College of Materials Science and Engineering, Qiqihar University, Qiqihar 161006, ChinaHeilongjiang Provincial Key Laboratory of Polymeric Composite Materials, College of Materials Science and Engineering, Qiqihar University, Qiqihar 161006, ChinaThe development of non-precious metal catalysts with excellent bifunctional activities is significant for air–metal batteries. ABO<sub>3</sub>-type perovskite oxides can improve their catalytic activity and electronic conductivity by doping transition metal elements at B sites. Here, we develop a novel Sm<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>1−x</sub>Ni<sub>x</sub>O<sub>3−δ</sub> (SSCN) nanofiber-structured electrocatalyst. In 0.1 M KOH electrolyte solution, Sm<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>0.8</sub>Ni<sub>0.2</sub>O<sub>3−δ</sub> (SSCN82) with the optimal Co: Ni molar ratio exhibits good electrocatalytic activity for OER/ORR, affording a low onset potential of 1.39 V, a slight Tafel slope of 123.8 mV dec<sup>−1</sup>, and a current density of 6.01 mA cm<sup>−2</sup> at 1.8 V, and the ORR reaction process was four-electron reaction pathway. Combining the morphological characteristic of SSCN nanofibers with the synergistic effect of cobalt and nickel with a suitable molar ratio is beneficial to improving the catalytic activity of SSCN perovskite oxides. SSCN82 exhibits good bi-functional catalytic performance and electrochemical double-layer capacitance.https://www.mdpi.com/1420-3049/27/4/1263Sm<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>1−x</sub>Ni<sub>x</sub>O<sub>3−</sub><sub>δ</sub>perovskitecathode electrocatalystOER/ORR |
| spellingShingle | Xingmei Liu Yuwei Wang Liquan Fan Weichao Zhang Weiyan Cao Xianxin Han Xijun Liu Hongge Jia Sm<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>1−x</sub>Ni<sub>x</sub>O<sub>3−δ</sub>—A Novel Bifunctional Electrocatalyst for Oxygen Reduction/Evolution Reactions Molecules Sm<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>1−x</sub>Ni<sub>x</sub>O<sub>3−</sub><sub>δ</sub> perovskite cathode electrocatalyst OER/ORR |
| title | Sm<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>1−x</sub>Ni<sub>x</sub>O<sub>3−δ</sub>—A Novel Bifunctional Electrocatalyst for Oxygen Reduction/Evolution Reactions |
| title_full | Sm<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>1−x</sub>Ni<sub>x</sub>O<sub>3−δ</sub>—A Novel Bifunctional Electrocatalyst for Oxygen Reduction/Evolution Reactions |
| title_fullStr | Sm<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>1−x</sub>Ni<sub>x</sub>O<sub>3−δ</sub>—A Novel Bifunctional Electrocatalyst for Oxygen Reduction/Evolution Reactions |
| title_full_unstemmed | Sm<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>1−x</sub>Ni<sub>x</sub>O<sub>3−δ</sub>—A Novel Bifunctional Electrocatalyst for Oxygen Reduction/Evolution Reactions |
| title_short | Sm<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>1−x</sub>Ni<sub>x</sub>O<sub>3−δ</sub>—A Novel Bifunctional Electrocatalyst for Oxygen Reduction/Evolution Reactions |
| title_sort | sm sub 0 5 sub sr sub 0 5 sub co sub 1 x sub ni sub x sub o sub 3 δ sub a novel bifunctional electrocatalyst for oxygen reduction evolution reactions |
| topic | Sm<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>1−x</sub>Ni<sub>x</sub>O<sub>3−</sub><sub>δ</sub> perovskite cathode electrocatalyst OER/ORR |
| url | https://www.mdpi.com/1420-3049/27/4/1263 |
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