2D High-Entropy Hydrotalcites,Small

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2D High-Entropy Hydrotalcites
Small ( IF 13.0 ) Pub Date : 2021-09-27 , DOI: 10.1002/smll.202103412
Xiwen Yu ₁ , Bing Wang _{1,

2} , Cheng Wang ₁ , Chen Zhuang ₂ , Yingfang Yao _{1,

2,

3,

4} , Zhaosheng Li _{1,

2,

3} , Congping Wu ₁ , Jianyong Feng _{1,

2,

3} , Zhigang Zou _{1,

2,

3,

5}

Affiliation

High-entropy materials (HEMs) with unique configuration and physicochemical properties have attracted intensive research interest. However, 2D HEMs have not been reported yet. To find out unique properties of combining 2D materials and HEMs, a series of 2D high-entropy hydrotalcites (HEHs) is created by coprecipitation method, including quinary, septenary, and even novenary metallic elements. It is found that the fast synthetic kinetics of coprecipitation process conquers the thermodynamically solubility limitation of different elements, which is the prerequisite condition to form HEHs. As the oxygen evolution reaction (OER) electrocatalysts, HEHs show significantly decreased apparent activation energy compared with low-entropy hydrotalcites (LEHs) due to the lattice distortion induced by the multimetallic character of HEHs. This work opens up a new avenue for the development of 2D HEMs, which broadens the family of HEMs and presents a most promising platform for exploring the unknown properties of HEMs.

中文翻译：

二维高熵水滑石

具有独特构型和物理化学性质的高熵材料（HEM）引起了广泛的研究兴趣。然而，尚未报道 2D HEM。为了找出二维材料与 HEM 结合的独特性质，通过共沉淀法制备了一系列二维高熵水滑石 (HEH)，包括五元、七元甚至九元金属元素。发现共沉淀过程的快速合成动力学克服了不同元素的热力学溶解度限制，这是形成 HEH 的先决条件。作为析氧反应 (OER) 电催化剂，由于 HEH 的多金属特性引起的晶格畸变，与低熵水滑石 (LEH) 相比，HEH 显示出显着降低的表观活化能。

更新日期：2021-11-11

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