School of Chemistry and Chemical Engineering, Harbin Institute of Technology , Harbin, 150090, P. R. China.
Academy of Fundamental and Interdisciplinary Sciences, Harbin Institute of Technology , Harbin, 150090, P. R. China.
ACS Appl Mater Interfaces. 2017 Sep 20;9(37):31777-31785. doi: 10.1021/acsami.7b07000. Epub 2017 Sep 6.
The development of inexpensive, efficient, and environmentally friendly catalysts for oxygen evolution reaction (OER) is of great significant for green energy utilization. Herein, binary metal oxides (MCoO, M = Zn, Ni, and Cu) with yolk-shell polyhedron (YSP) structure were fabricated by facile pyrolysis of bimetallic zeolitic imidazolate frameworks (MCo-ZIFs). Benefiting from the synergistic effects of metal ions and the unique yolk-shell structure, MCoO YSP displays good OER catalytic activity in alkaline media. Impressively, ZnCoO YSP shows a comparable overpotential of 337 mV at 10 mA cm to commercial RuO and exhibits superior long-term durability. The high activity and good stability reveals its promising application.
用于氧气析出反应（OER）的廉价、高效且环保的催化剂的开发对于绿色能源的利用具有重要意义。在此，通过双金属沸石咪唑酯骨架（MCo-ZIFs）的简单热解制备了具有蛋黄壳多面体（YSP）结构的二元金属氧化物（MCoO，M=Zn、Ni 和 Cu）。受益于金属离子的协同作用和独特的蛋黄壳结构，MCoO YSP 在碱性介质中表现出良好的 OER 催化活性。引人注目的是，ZnCoO YSP 在 10 mA cm 下的过电位仅为 337 mV，与商业 RuO 相当，并表现出优异的长期耐久性。高活性和良好的稳定性表明其具有广阔的应用前景。
