Li Yuwen, Zhao Tao, Lu Mengting, Wu Yuhang, Xie Yuanbo, Xu Hui, Gao Junkuo, Yao Juming, Qian Guodong, Zhang Qichun
Institute of Fiber Based New Energy Materials, The Key laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education, School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou, 310018, China.
College of Materials Science and Engineering, China Jiliang University, Hangzhou, 310018, China.
Small. 2019 Oct;15(43):e1901940. doi: 10.1002/smll.201901940. Epub 2019 Sep 5.
The construction of efficient, durable, and non-noble metal electrocatalysts for oxygen evolution reaction (OER) is of great value but challenging. Herein, a facile method is developed to synthesize a series of trimetallic (W/Co/Fe) metal-organic frameworks (MOFs)-derived carbon nanoflakes (CNF) with various Fe content, and an Fe-dependent volcano-type plot can be drawn out for WCoFe -CNF. The optimized WCoFe -CNF (when the feed ratio of Fe/Co is 0.3) demonstrates superior electrocatalytic performance with a low overpotential of only 254 mV@10 mA cm and excellent durability of 100 h. Further researches show that appropriate amount of iron doping can regulate the electronic structure, resulting in a favorable synergistic environment. This method may stimulate the exploration of electrocatalysts by utilizing MOFs as precursors while realizing electronic modulation by multimetal doping.
构建用于析氧反应（OER）的高效、耐用且非贵金属电催化剂具有重要价值，但极具挑战性。在此，开发了一种简便方法来合成一系列具有不同铁含量的三金属（W/Co/Fe）金属有机框架（MOF）衍生的碳纳米片（CNF），并且可以为WCoFe-CNF绘制出铁依赖的火山型曲线。优化后的WCoFe-CNF（当Fe/Co的进料比为0.3时）表现出优异的电催化性能，在10 mA cm时过电位仅为254 mV，且具有100小时的出色耐久性。进一步研究表明，适量的铁掺杂可以调节电子结构，从而形成有利的协同环境。该方法可能会激发利用MOF作为前驱体来探索电催化剂，同时通过多金属掺杂实现电子调制。
