Plasma-induced surface reorganization of porous Co3O4-CoO heterostructured nanosheets for electrocatalytic water oxidation.,Journal of Colloid and Interface Science

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Plasma-induced surface reorganization of porous Co3O4-CoO heterostructured nanosheets for electrocatalytic water oxidation.
Journal of Colloid and Interface Science ( IF 9.4 ) Pub Date : 2020-01-16 , DOI: 10.1016/j.jcis.2020.01.045
Junlei Qi ₁ , Yaotian Yan ₁ , Tao Liu ₁ , Xin Zhou ₂ , Jian Cao ₁ , Jicai Feng ₁

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Herein, porous Co3O4-CoO heterostructured nanosheets are constructed by plasma treatment. The density-functional theory calculations demonstrate that constructing Co3O4-CoO heterostructures modify the electronic structure to achieve enhanced electrical conductivity, but also boost the charge transfer to realize enhanced surface reactivity. Contributing to the short ion diffusion path, the rich electroactive surface sites and enhanced charge transfer capability, the resulting Co3O4-CoO nanosheet arrays possess the low overpotential of 270 mV at 10 mA cm-2 and the low Tafel slope of 49 mV dec-1. This work provides a novel strategy to construct heterostructured nanosheet arrays by surface reorganization for cost-effective OER electrocatalyst.

中文翻译：

等离子体诱导的多孔Co3O4-CoO异质结构纳米片的表面重组，用于电催化水氧化。

在此，通过等离子体处理来构造多孔的Co 3 O 4 -CoO异质结构纳米片。密度泛函理论计算表明，构建Co3O4-CoO异质结构可以修饰电子结构以实现增强的电导率，但也可以促进电荷转移，从而实现增强的表面反应性。促成短的离子扩散路径，丰富的电活性表面位点和增强的电荷转移能力，所得的Co3O4-CoO纳米片阵列在10 mA cm-2下具有270 mV的低过电势，在49 mV dec-1的低Tafel斜率。这项工作提供了一种新颖的策略，可以通过表面重组来构建具有成本效益的OER电催化剂的异质结构纳米片阵列。

更新日期：2020-01-16

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