Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, Key Laboratory of Green Chemical Engineering Process of Ministry of Education, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430205, China.
Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education), Hubei Key Laboratory of Material Chemistry and Service Failure, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
Proc Natl Acad Sci U S A. 2022 May 17;119(20):e2202812119. doi: 10.1073/pnas.2202812119. Epub 2022 May 9.
Developing facile approaches for preparing efficient electrocatalysts is of significance to promote sustainable energy technologies. Here, we report a facile iron-oxidizing bacteria corrosion approach to construct a composite electrocatalyst of nickel–iron oxyhydroxides combined with iron oxides. The obtained electrocatalyst shows improved electrocatalytic activity and stability for oxygen evolution, with an overpotential of ∼230 mV to afford the current density of 10 mA cm−2. The incorporation of iron oxides produced by iron-oxidizing bacteria corrosion optimizes the electronic structure of nickel–iron oxyhydroxide electrodes, which accounts for the decreased free energy of oxygenate generation and the improvement of OER activity. This work demonstrates a natural bacterial corrosion approach for the facile preparation of efficient electrodes for water oxidation, which may provide interesting insights in the multidisciplinary integration of innovative nanomaterials and emerging energy technologies.
开发简便的方法来制备高效的电催化剂对于推动可持续能源技术具有重要意义。在这里，我们报告了一种简便的铁氧化细菌腐蚀方法，用于构建由镍-铁水氧化物与氧化铁结合而成的复合电催化剂。所得到的电催化剂表现出改善的析氧电催化活性和稳定性，在提供 10 mA cm-2 的电流密度时，过电势约为 230 mV。铁氧化细菌腐蚀产生的氧化铁的掺入优化了镍-铁水氧化物电极的电子结构，这解释了含氧物生成的自由能降低和 OER 活性的提高。这项工作展示了一种简便的制备高效水氧化电极的天然细菌腐蚀方法，这可能为创新纳米材料和新兴能源技术的多学科融合提供有趣的见解。
