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$Sm_{0.5}Sr_{0.5}Co_{1−x}Ni_{x}O_{3−δ}$—A Novel Bifunctional Electrocatalyst for Oxygen Reduction/Evolution Reactions
| Content Provider | MDPI |
|---|---|
| Author | Liu, Xingmei Wang, Yuwei Fan, Liquan Zhang, Weichao Cao, Weiyan Han, Xianxin Liu, Xijun Jia, Hongge |
| Copyright Year | 2022 |
| Description | The development of non-precious metal catalysts with excellent bifunctional activities is significant for air–metal batteries. $ABO_{3}$-type perovskite oxides can improve their catalytic activity and electronic conductivity by doping transition metal elements at B sites. Here, we develop a novel $Sm_{0.5}Sr_{0.5}Co_{1−x}Ni_{x}O_{3−δ}$ (SSCN) nanofiber-structured electrocatalyst. In 0.1 M KOH electrolyte solution, $Sm_{0.5}Sr_{0.5}Co_{0.8}Ni_{0.2}O_{3−δ}$ (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 $dec^{−1}$, and a current density of 6.01 mA $cm^{−2}$ 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. |
| Starting Page | 1263 |
| e-ISSN | 14203049 |
| DOI | 10.3390/molecules27041263 |
| Journal | Molecules |
| Issue Number | 4 |
| Volume Number | 27 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-02-14 |
| Access Restriction | Open |
| Subject Keyword | Molecules Electrochemistry Sm0.5sr0.5co1−xnixo3−δ Perovskite Cathode Electrocatalyst Oer/orr |
| Content Type | Text |
| Resource Type | Article |
