High Phase‐Purity 1T‐MoS2 Ultrathin Nanosheets by a Spatially Confined Template

• Published in: Angewandte Chemie International Edition 2019-12, Vol.58 (49), p.17621-17624
• Main Authors: Chen, Xiaoyu, Wang, Zumin, Wei, Yanze, Zhang, Xing, Zhang, Qinghua, Gu, Lin, Zhang, Lijuan, Yang, Nailiang, Yu, Ranbo
• Format: Article
• Language: English
• Subjects: Confined spaces; hydrogen evolution reaction; Hydrogen evolution reactions; intercalation; Metastable phases; Molybdenum disulfide; Nanomaterials; Nanosheets; Purity
• ISSN: 1433-7851; 1521-3773
• DOI: 10.1002/anie.201909879

The crystal phase plays an important role in controlling the properties of a nanomaterial; however, it is a great challenge to obtain a nanomaterial with high purity of the metastable phase. For instance, the large‐scale synthesis of the metallic phase MoS2 (1T‐MoS2) is important for enhancing electrocatalytic reaction, but it can only be obtained under harsh conditions. Herein, a spatially confined template method is proposed to synthesize high phase‐purity MoS2 with a 1T content of 83 %. Moreover, both the confined space and the structure of template will affect the purity of 1T‐MoS2; in this case, this approach was extended to other similar spatially confined templates to obtain the high‐purity material. The obtained ultrathin nanosheets exhibit good electrocatalytic activity and excellent stability in the hydrogen evolution reaction. 1T‐MoS2 coupled with NiS2 was successfully synthesized in high phase purity by a spatially confined template method on a large scale. A different ratio of 1T‐MoS2 could be obtained by simply regulating the structure of the template. The hydrogen evolution reaction (HER) performance of the 1T‐MoS2/NiS2 in alkaline media was studied.