Kai Zeng, Hongwei Tao, Yijia Zhaoshi, Jiawen Feng, Shuhao Jiang, Yanfang Wu, Ruizhi Yang, Zhengyou He, Yibing Li
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Benefitting from the synergetic effects between lattice-matched heterointerface and oxygen vacancies induce the strong electronic coupling, optimized OH<sup>−</sup>/O<sub>2</sub> diffusion pathway and ample active sites, thus-prepared Vo-NiO/NiFe<sub>2</sub>O<sub>4</sub> presents a favorable OER performance with a low overpotential (261 mV @ 10 mA cm<sup>−2</sup>) and small Tafel slope (39.4 mV dec<sup>−1</sup>), even surpassing commercial RuO<sub>2</sub> catalyst. Additionally, the two-electrode configuration water electrolyzer and rechargeable zinc-air battery assembled by Vo-NiO/NiFe<sub>2</sub>O<sub>4</sub> catalyst show the potential practical application directions. This work provides an innovative avenue for strengthening OER performance toward water electrolysis and Zn-air batteries <i>via</i> the interface and vacancy engineering strategy.</p>","PeriodicalId":144,"journal":{"name":"Chemistry - A European Journal","volume":"30 37","pages":""},"PeriodicalIF":3.9000,"publicationDate":"2024-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/chem.202401272","citationCount":"0","resultStr":"{\"title\":\"Plasma-Engraved Lattice-Matched NiO/NiFe2O4 Heterostructure with Ample Oxygen Vacancies for Efficient Water Electrolysis and Zn-Air Batteries\",\"authors\":\"Kai Zeng, Hongwei Tao, Yijia Zhaoshi, Jiawen Feng, Shuhao Jiang, Yanfang Wu, Ruizhi Yang, Zhengyou He, Yibing Li\",\"doi\":\"10.1002/chem.202401272\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Heterogeneous interface and defect engineering offer effective pathways to accelerate oxygen evolution reaction (OER) charge transfer kinetics and motivate optimal intrinsic catalytic activity. 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引用次数: 0
摘要
异质界面和缺陷工程为加速氧进化反应（OER）电荷转移动力学和激发最佳内在催化活性提供了有效途径。在此，我们报告了通过可行的水热煅烧和等离子刻蚀辅助技术诱导出的具有大量氧空位的晶格匹配 NiO/NiFe2O4 异质结构（Vo-NiO/NiFe2O4），该结构显示出交织纳米片独特的多孔微花排列。得益于晶格匹配的异质表面与氧空位之间的协同效应、强电子耦合、优化的 OH-/O2 扩散途径和充足的活性位点，制备的 Vo-NiFe2O4 具有良好的 OER 性能，过电位低（261 mV @ 10 mA cm-2），塔菲尔斜率小（39.4 mV dec-1），甚至超过了商用 RuO2 催化剂。此外，用 Vo-NiO/NiFe2O4 催化剂组装的双电极结构水电解槽和可充电锌-空气电池显示了潜在的实际应用方向。这项工作为通过界面和空位工程策略来加强水电解和锌-空气电池的 OER 性能提供了一条创新途径。
Plasma-Engraved Lattice-Matched NiO/NiFe2O4 Heterostructure with Ample Oxygen Vacancies for Efficient Water Electrolysis and Zn-Air Batteries
Heterogeneous interface and defect engineering offer effective pathways to accelerate oxygen evolution reaction (OER) charge transfer kinetics and motivate optimal intrinsic catalytic activity. Herein, we report the lattice-matched NiO/NiFe2O4 heterostructure with ample oxygen vacancies (Vo-NiO/NiFe2O4) induced by a feasible hydrothermal followed by calcination and plasma-engraving assistant technique, which shows the unique porous microflower arrangement of intertwined nanosheets. Benefitting from the synergetic effects between lattice-matched heterointerface and oxygen vacancies induce the strong electronic coupling, optimized OH−/O2 diffusion pathway and ample active sites, thus-prepared Vo-NiO/NiFe2O4 presents a favorable OER performance with a low overpotential (261 mV @ 10 mA cm−2) and small Tafel slope (39.4 mV dec−1), even surpassing commercial RuO2 catalyst. Additionally, the two-electrode configuration water electrolyzer and rechargeable zinc-air battery assembled by Vo-NiO/NiFe2O4 catalyst show the potential practical application directions. This work provides an innovative avenue for strengthening OER performance toward water electrolysis and Zn-air batteries via the interface and vacancy engineering strategy.
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Chemistry—A European Journal is a truly international journal with top quality contributions (2018 ISI Impact Factor: 5.16). It publishes a wide range of outstanding Reviews, Minireviews, Concepts, Full Papers, and Communications from all areas of chemistry and related fields.
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