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Enhancing Oxygen Evolution Reaction through Modulating Electronic Structure of Trimetallic Electrocatalysts Derived from Metal-Organic Frameworks.

Yuwen LiTao ZhaoMengting LuYuhang WuYuanbo XieHui XuJunkuo GaoJuming YaoGuodong QianShanqing Zhang
Published in: Small (Weinheim an der Bergstrasse, Germany) (2019)
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 WCoFex -CNF. The optimized WCoFe0.3 -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-2 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.
Keyphrases
  • metal organic framework
  • gold nanoparticles