Effect of Mechanical Alloying in Polymer/Ceramic Composites

Facile and Scalable Mechanochemical Synthesis of Defective MoS2 with Ru Single Atoms Toward High‐Current‐Density Hydrogen Evolution

“…Currently, high-energy mechanochemical ball milling (HMBM) is gaining attention in catalyst preparation due to its eco-friendly, scalable and reproducible nature [13] HMBM is a mechanical process that enables the purposeful execution of physical and chemical transformations in powdered materials [14] Typically, under the shear force and impact force, the HMBM process involves constant deformation, fracturing and cold welding of materials during repeated collisions with stainless steel balls, which is not only widely used in the synthesis of materials, but also used in the modification of materials, like exfoliation, refinement and even the creation of defects [15] For example, Kim et al reported the synthesis of single atoms catalysts via ball milling strategy is validated [16] By ball milling Pt precursors (K 2 PtCl 4 ) with nitrogen-doped carbon supports, the Pt single atom catalyst is directly obtained with a loading amount of 1.92 wt.%, exhibiting 17-fold enhancement in mass activity as compared to commercial 20 wt.% Pt/C for the electrochemical hydrogen evolution. Also, the HMBM is extensively applied in the preparation of layered 2D materials, like graphene, BN, and C 3 N 4 nanosheets [17] Besides the synthesis and modification of materials, the merits of easy operation, short fabrication time, mild working conditions (room temperature and atmospheric pressure) and low-cost, naturally endow HMBM with great potential for commercial applications.…”