Polyaniline Derived N‐Doped Carbon‐Coated Cobalt Phosphide Nanoparticles Deposited on N‐Doped Graphene as an Efficient Electrocatalyst for Hydrogen Evolution Reaction,Small

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Polyaniline Derived N‐Doped Carbon‐Coated Cobalt Phosphide Nanoparticles Deposited on N‐Doped Graphene as an Efficient Electrocatalyst for Hydrogen Evolution Reaction
Small ( IF 13.0 ) Pub Date : 2017-11-17 , DOI: 10.1002/smll.201702895
Jingwen Ma ₁ , Min Wang ₁ , Guangyu Lei ₁ , Guoliang Zhang ₁ , Fengbao Zhang ₁ , Wenchao Peng ₁ , Xiaobin Fan ₁ , Yang Li ₁

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The development of highly efficient and durable non‐noble metal electrocatalysts for the hydrogen evolution reaction (HER) is significant for clean and renewable energy research. This work reports the synthesis of N‐doped graphene nanosheets supported N‐doped carbon coated cobalt phosphide (CoP) nanoparticles via a pyrolysis and a subsequent phosphating process by using polyaniline. The obtained electrocatalyst exhibits excellent electrochemical activity for HER with a small overpotential of −135 mV at 10 mA cm⁻² and a low Tafel slope of 59.3 mV dec⁻¹ in 0.5 m H₂SO₄. Additionally, the encapsulation of N‐doped carbon shell prevents CoP nanoparticles from corrosion, exhibiting good stability after 14 h operation. Moreover, the as‐prepared electrocatalyst also shows outstanding activity and stability in basic and neutral electrolytes.

中文翻译：

聚苯胺衍生的N掺杂碳包覆的磷化钴钴纳米颗粒沉积在N掺杂石墨烯上作为氢生成反应的高效电催化剂

用于氢析出反应（HER）的高效耐用的非贵金属电催化剂的开发对于清洁和可再生能源的研究具有重要意义。这项工作报告了通过热解和随后的使用聚苯胺的磷化工艺合成负载N掺杂碳包覆的磷化钴（CoP）纳米颗粒的N掺杂石墨烯纳米片。将所得到的电催化剂表现出对HER用小的过电位-135毫伏在10mA厘米优良的电化学活性^-2和59.3毫伏分解的低塔菲尔斜率^-1 0.5米ħ ₂ SO ₄。此外，N掺杂碳壳的封装可防止CoP纳米颗粒腐蚀，在运行14小时后表现出良好的稳定性。此外，所制备的电催化剂在碱性和中性电解质中也显示出出色的活性和稳定性。

更新日期：2017-11-17

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