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

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.