Boosting Hydrazine Oxidation Reaction on CoP/Co Mott–Schottky Electrocatalyst through Engineering Active Sites,The Journal of Physical Chemistry Letters

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Boosting Hydrazine Oxidation Reaction on CoP/Co Mott–Schottky Electrocatalyst through Engineering Active Sites
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2021-05-17 , DOI: 10.1021/acs.jpclett.1c00963
Shi Chen ₁ , Changlai Wang _{1,

2} , Shuai Liu ₁ , Minxue Huang ₁ , Jian Lu ₁ , Pengping Xu ₁ , Huigang Tong ₁ , Lin Hu ₃ , Qianwang Chen _{1,

3}

Affiliation

The hydrazine oxidation reaction (HzOR), as a substitute for the sluggish oxygen evolution reaction (OER), is identified as a promising powerfrugal strategy for hydrogen production through water splitting. However, the HzOR activity of the present electrocatalysts is unsatisfying because the work potential is much higher than the theoretical value. Herein, we design a typical Mott–Schottky electrocatalyst consisting of CoP/Co nanoparticles for the HzOR, which exhibits remarkable HzOR activity with ultralow potentials of −69 and 177 mV at 10 and 100 mA cm^–2, respectively. It stands out in a range of cobalt-based materials and is even comparable to some precious-metal-based materials composed of Pt or Ru. A shown by with structural characterization and density functional theory (DFT) calculations, the interfaces between CoP/Co nanoparticles not only provide the active sites of HzOR but also promote the multistep dehydrogenation reaction of N₂H₄, thus enhancing the HzOR activity.

中文翻译：

通过工程活性位点促进CoP / Co Mott-Schottky电催化剂上的肼氧化反应

肼氧化反应（HzOR）代替了缓慢的放氧反应（OER），被认为是通过水分解制氢的一种有希望的节能方法。然而，由于工作电势远高于理论值，因此本电催化剂的HzOR活性不能令人满意。本文中，我们设计了由CoP / Co纳米粒子组成的典型Mott-Schottky电催化剂用于HzOR，在10和100 mA cm ^–2时，HzOR表现出显着的HzOR活性，−69和177 mV的超低电势，分别。它在一系列钴基材料中脱颖而出，甚至可以与某些由Pt或Ru组成的贵金属基材料相媲美。通过结构表征和密度泛函理论（DFT）计算表明，CoP / Co纳米粒子之间的界面不仅提供了HzOR的活性位点，而且还促进了N ₂ H ₄的多步脱氢反应，从而增强了HzOR活性。

更新日期：2021-05-27

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