Huang Yi, Zhang Song Lin, Lu Xue Feng, Wu Zhi-Peng, Luan Deyan, Lou Xiong Wen David
School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore.
Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, 450001, P. R. China.
Angew Chem Int Ed Engl. 2021 May 17;60(21):11841-11846. doi: 10.1002/anie.202103058. Epub 2021 Apr 15.
The development of efficient and low-cost electrocatalysts toward the oxygen evolution reaction (OER) is critical for improving the efficiency of several electrochemical energy conversion and storage devices. Here, we report an elaborate design and synthesis of porous Co-based trimetallic spinel oxide nanoboxes (NiCo Fe O NBs) by a novel metal-organic framework engaged strategy, which involves chemical etching, cation exchange, and subsequent thermal oxidation processes. Owing to the structural and compositional advantages, the optimized trimetallic NiCo Fe O NBs (x is about 0.117) deliver superior electrocatalytic performance for OER with an overpotential of 274 mV at 10 mA cm , a small Tafel slope of 42 mV dec , and good stability in alkaline electrolyte, which is much better than that of Co-based bi/monometallic spinel oxides and even commercial RuO .
开发高效且低成本的析氧反应（OER）电催化剂对于提高多种电化学能量转换和存储装置的效率至关重要。在此，我们报告了一种通过新颖的金属有机框架参与策略精心设计和合成多孔钴基三金属尖晶石氧化物纳米盒（NiCo₂FeO₄ NBs）的方法，该策略涉及化学蚀刻、阳离子交换以及随后的热氧化过程。由于结构和组成优势，优化后的三金属NiCo₂FeO₄ NBs（x约为0.117）在10 mA cm⁻²电流密度下具有274 mV的过电位、42 mV dec⁻¹的小塔菲尔斜率以及在碱性电解质中的良好稳定性，展现出优异的OER电催化性能，这比钴基双金属/单金属尖晶石氧化物甚至商业RuO₂都要好得多。
