Hierarchical Zn‐Doped CoO Nanoflowers for Electrocatalytic Oxygen Evolution Reaction,ChemCatChem

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Hierarchical Zn‐Doped CoO Nanoflowers for Electrocatalytic Oxygen Evolution Reaction
ChemCatChem ( IF 3.8 ) Pub Date : 2019-02-05 , DOI: 10.1002/cctc.201801908
Meiling Huo ₁ , Zhiyuan Yang ₁ , Chenxi Yang ₂ , Zhong Gao ₁ , Jing Qi ₁ , Zuozhong Liang ₁ , Kaiqiang Liu ₁ , Heyin Chen ₁ , Haoquan Zheng ₁ , Rui Cao _{1,

3}

Affiliation

Hierarchical Zn‐doped CoO nanoflowers have been prepared using their hydroxides as precursors. The nanoflowers are assembled by dozens of 2D nanoplates. Each nanoplate is formed by numerous Zn‐doped CoO nanoparticles. Zn‐doped CoO catalyst is highly efficient for electrocatalytic water oxidation with a low overpotential (η=293 mV at j=10 mA cm⁻²) and long‐term stability, which is comparable to the commercial RuO₂ catalysts in alkaline media. The 3D hierarchical structure provides abundant surface catalytic sites, while the density functional theory (DFT) calculations show that the Zn doping is also beneficial for the enhanced oxygen evolution reaction (OER) activities. This series of novel hierarchical porous nanoflowers is a promising anode material for water oxidation.

中文翻译：

分层掺杂锌的CoO纳米花用于电催化氧释放反应

使用其氢氧化物作为前体制备了分层掺杂Zn的CoO纳米花。纳米花由数十个2D纳米板组装而成。每个纳米板都是由许多掺杂Zn的CoO纳米颗粒形成的。Zn掺杂的CoO催化剂对电催化水氧化非常有效，具有超低的电势（j = 10 mA cm ^-2时η = 293 mV ）和长期稳定性，可与市售RuO _2相比碱性介质中的催化剂。3D分层结构提供了丰富的表面催化位点，而密度泛函理论（DFT）计算表明，Zn掺杂也有利于增强的析氧反应（OER）活性。这一系列新颖的分层多孔纳米花是用于水氧化的有前途的阳极材料。

更新日期：2019-02-05

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