Calcined Nickel‐Cobalt Mixed Metal Phosphonate with Efficient Electrocatalytic Activity for Oxygen Evolution Reaction,ChemistrySelect

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Calcined Nickel‐Cobalt Mixed Metal Phosphonate with Efficient Electrocatalytic Activity for Oxygen Evolution Reaction
ChemistrySelect ( IF 1.9 ) Pub Date : 2018-01-16 , DOI: 10.1002/slct.201702637
Pingjing Feng ₁ , Xian Cheng ₁ , Jintang Li ₁ , Xuetao Luo ₁

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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/cm² at a lower over‐potential of 264 mV, Tafel slope of 60 mV⋅dec⁻¹ and superior durability in 1.0 M KOH solution.

中文翻译：

煅烧的镍钴混合金属膦酸盐具有高效的电催化活性，可用于氧气释放反应

过渡金属膦酸酯作为氧释放反应（OER）的有效催化剂最近已受到关注。本文合成了花状苯钴酸镍钴微球，可作为OER的优良电催化剂。在空气中于高温下煅烧后，得到的焦磷酸金属产物显示出优异的电催化性能。焦磷酸金属盐的基质中掺杂有少量的苯膦酸盐热解碳，通过改善材料的电子传递，促进了OER催化。标为CoNiPP-600的样品具有最出色的催化活性，电流密度为10 mA / cm ²，较低的过电势为264 mV，Tafel斜率为60 mV·dec ^-1 在1.0 M KOH溶液中具有出色的耐久性。

更新日期：2018-01-16

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