Ultrastable In‐Plane 1T–2H MoS2 Heterostructures for Enhanced Hydrogen Evolution Reaction,Advanced Energy Materials

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Ultrastable In‐Plane 1T–2H MoS2 Heterostructures for Enhanced Hydrogen Evolution Reaction
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2018-07-18 , DOI: 10.1002/aenm.201801345
Shuai Wang ₁ , Di Zhang ₁ , Bin Li ₁ , Chao Zhang ₁ , Zhiguo Du ₁ , Haoming Yin ₁ , Xiaofang Bi ₁ , Shubin Yang ₁

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Metallic 1T MoS₂ is highly desirable for catalyzing electrochemical hydrogen production from water owing to its high electrical conductivity. However, stable 1T MoS₂ is difficult to be produced in large‐scale by either common chemical or physical approaches. Here, ultrastable in‐plane 1T–2H MoS₂ heterostructures are achieved via a simple one‐pot annealing treatment of 2H MoS₂ bulk under a mixture gas of Ar and phosphorous vapor, where phosphorus cannot only occupy the interspace of MoS₂ bulk, resulting in the expansion of MoS_2, but also embed into the lattice of MoS_2, inducing the partial phase transition from 2H to 1T phases of MoS₂. Benefiting from its significantly improved electrical conductivity, highly exposed active sites, and hydrophily property, in‐plane 1T–2H MoS₂ heterostructures exhibit largely improved electrocatalytic properties for hydrogen evolution reaction (HER) in alkaline electrolytes.

中文翻译：

超稳定平面内1T–2H MoS2异质结构，可增强氢释放反应

金属1T MoS ₂由于其高电导率而非常需要用于催化从水中产生电化学氢。但是，很难通过常规化学或物理方法大规模生产稳定的1T MoS ₂。在这里，通过在Ar和磷蒸气的混合气体下对2H MoS ₂块进行简单的单锅退火处理，即可获得超稳定的面内1T–2H MoS ₂异质结构，其中磷不能仅占据MoS ₂块的空间，从而在硫化钼的膨胀_2，而且还嵌入到硫化钼的晶格_2，诱导从2H部分相转变为MO的1T相位₂。平面内1T–2H MoS ₂异质结构得益于其显着改善的电导率，高度暴露的活性位点和亲水性，在碱性电解质中对氢析出反应（HER）的电催化性能大大提高。

更新日期：2018-07-18

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