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Supramolecular Nanofiber Templated Metal‐embedded Nitrogen‐doped Carbon Nanotubes for Efficient Electrocatalysis of Oxygen Evolution Reaction
Author(s) -
Wu Jin,
Zhao Tao,
Zhang Rui,
Xu Rongkuan,
Gao Junkuo,
Yao Juming
Publication year - 2018
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201800373
Subject(s) - tafel equation , overpotential , oxygen evolution , electrocatalyst , carbon nanotube , materials science , catalysis , chemical engineering , nanofiber , electrospinning , nanotechnology , chemistry , electrochemistry , composite material , electrode , organic chemistry , polymer , engineering
Nowadays, there still exists big challenges to synthesize active and inexpensive electrocatalysts for oxygen evolution reaction. In this work, we propose a new method by using melamine‐uric acid (MAUA) supramolecular nanofibers as precursor to fabricate metal‐embedded nitrogen‐doped carbon nanotube materials ( MM ′@NCNTs, M, M ′ = Fe, Co, Ni). The samples exhibit superior and stable catalytic performance for oxygen evolution reaction (OER) in alkaline medium. In all the electrocatalysts, FeNi@NCNT shows the best electrocatalytic activity with the overpotential is only 402 mV (vs. RHE) at 10 mA · cm –2 , which shows better performance than both Fe@NCNT and Ni@NCNT. The smaller Tafel slope value, with the value of 68 mV · dec –1 , indicates the superior OER activity of FeNi@NCNT. These results reveal a synergistic effect between Fe, Co, and Ni, which could produce a favorable coordination environment that enhance the activity for oxygen evolution reaction.