| 基于金属有机骨架前驱体制备纳米磷化镍催化剂 | |
| Preparation of Metal-Organic Framework-Derived Nano-Scale Nickel Phosphide Catalysts | |
| 摘要: 采用镍基金属有机骨架化合物（Ni-MOF）为前驱体，通过低温碳化获得Ni@C，并通过磷化成功地制备了不同结构的磷化镍纳米颗粒。将所得材料应用于析氢反应（HER）催化剂，在Ni@C与红磷质量比为1∶1及热解温度为500℃时获得的Ni1P1-500表现出优异的电催化性能，在酸性介质中，电流密度为10 mA·cm-2时，过电位为178 mV，并展现了良好的循环性能。较小的Tafel斜率（62 mV·dec-1）揭示了析氢反应的机理为Desorption-Heyrovsky机制。优异的电催化性能可归因于磷化镍催化剂表面存在的质子受体（P位点）和氢化物受体（Ni位点）活性中心。 | |
| 关键词: 金属有机骨架化合物 磷化镍 纳米颗粒 析氢反应 电催化 | |
| 基金项目: 海南省自然科学基金（No.219QN219）、海南省重点研发项目（No.ZDYF2018024）和海南医学院人才科研基金资助项目。 | |
| Abstract: Herein, nickel phosphides nanoparticles with different phases were successfully prepared by multi-step calcination and phosphidation process at low temperature using Ni based MOF (Ni-MOF) as the precursor. The resulting materials were applied to the hydrogen evolution reaction (HER) catalyst, Ni1P1-500 obtained at a mass ratio of Ni@C to red phosphorus of 1:1 and a pyrolysis temperature of 500℃ exhibited a remarkably enhanced electrocatalytic performance with a current density of 10 mA·cm-2 at an overpotential of 178 mV and a superior durability for the HER in acid media. A small Tafel slope of 62 mV·dec-1 revealed a Desorption-Heyrovsky mechanism during the HER. The excellent electrocatalytic performance might be ascribed to the presence of the proton acceptor (P site) and hydride-acceptor (Ni site) centers on the surface of nickel phosphide. | |
| Keywords: metal-organic framework nickel phosphide nanoparticles hydrogen evolution reaction electrocatalysis | |
| 投稿时间：2019-03-04 修订日期：2019-05-05 | |
| 摘要点击次数: 2021 | |
| 全文下载次数: 625 | |
| 徐丹,朱良奎,周丹,付煜荣,符小文,陈榕,李海霞.基于金属有机骨架前驱体制备纳米磷化镍催化剂[J].无机化学学报,2019,35(8):1455-1462. | |
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