Hierarchical CoP Nanostructures on Nickel Foam as Efficient Bifunctional Catalysts for Water Splitting,ChemSusChem

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Hierarchical CoP Nanostructures on Nickel Foam as Efficient Bifunctional Catalysts for Water Splitting
ChemSusChem ( IF 7.5 ) Pub Date : 2020-12-23 , DOI: 10.1002/cssc.202002624
Hongshuai Cao ₁ , Zhibin Li ₁ , Ying Xie ₁ , Fang Xiao ₁ , Honglei Wang ₁ , Xiaoyan Wang ₁ , Kai Pan ₁ , Andreu Cabot _{2,

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Affiliation

A highly active and cheap catalyst is also key to hydrogen production by water splitting. However, most of the high‐efficiency catalysts reported to date only are catalytically active for either the hydrogen evolution reaction (HER) or the oxygen evolution reaction (OER), which makes the development of multifunctional catalysts more meaningful. Here, for the first time, Co(CO₃)_0.5OH^.0.11 H₂O (CHCH) as precursor with different microstructures on the surface of nickel foam (NF) was obtained using a facile hydrothermal method. The CoP/NF catalyst was obtained after thermal phosphating that retained the microhierarchical structure of the precursor and greatly improved the catalytic performance, with a highly efficiency performance as HER and OER dual‐functional catalyst. Density functional theory (DFT) calculations showed that the possible reason for the excellent performance of the CoP/NF layered structure is an increase in the number of of surface defects and an increased active surface area. The results reported in this paper show that CoP/NF, a layered bifunctional electrocatalyst, is a cost‐effective and efficient water‐splitting electrode. This finding can offer the opportunity for the commercial use of excess electric energy for large‐scale water splitting hydrogen production.

中文翻译：

泡沫镍作为高效双功能水分解催化剂的分层CoP纳米结构

高活性和廉价的催化剂也是通过水分解制氢的关键。然而，迄今为止报道的大多数高效催化剂仅对氢气析出反应（HER）或氧气析出反应（OER）具有催化活性，这使多功能催化剂的开发变得更加有意义。在此，Co（CO ₃）_0.5 OH为首次^。0.11高₂使用简便的水热法获得了在泡沫镍（NF）表面具有不同微观结构的前驱体O（CHCH）。CoP / NF催化剂是在热磷化后获得的，保留了前体的微层结构并极大地改善了催化性能，并具有作为HER和OER双功能催化剂的高效性能。密度泛函理论（DFT）计算表明，CoP / NF层状结构具有出色性能的可能原因是表面缺陷数量增加和有效表面积增加。本文报道的结果表明，CoP / NF是一种层状双功能电催化剂，是一种经济高效的水分解电极。

更新日期：2021-02-18

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