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Calcined Nickel‐Cobalt Mixed Metal Phosphonate with Efficient Electrocatalytic Activity for Oxygen Evolution Reaction
Author(s) -
Feng Pingjing,
Cheng Xian,
Li Jintang,
Luo Xuetao
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201702637
Subject(s) - tafel equation , oxygen evolution , electrocatalyst , cobalt , calcination , catalysis , nickel , chemistry , inorganic chemistry , metal , transition metal , electrochemistry , electrode , organic chemistry
Transition metal phosphonates have recently gained attentions as efficient catalysts for oxygen evolution reaction (OER). In this paper, flower‐like nickel‐cobalt phenylphosphonate microspheres were sythesized, which could be used as excellent electrocatalyst for OER. After calcined at high temperature in air, resulted product of metal pyrophosphate exhibited outstanding electrocatalytic property. A small amount of carbon coming from the pyrolysis of phenylphosphonate were doped in matrix of metal pyrophosphonate, which promoted the OER catalysis by improving the electron transfer of material. Sample denoted as CoNiPP‐600 had the most excellent catalytic activity, with a current density of 10 mA/cm 2 at a lower over‐potential of 264 mV, Tafel slope of 60 mV⋅dec −1 and superior durability in 1.0 M KOH solution.