亚纳米尺度过渡金属硫族化合物制备、超结构组装及析氢性能

The development of materials for hydrogen evolution reaction (HER) has a great significance for the replacement of fossil energy by hydrogen energy. Transition metal chalcogenides have been proved to display promising performance in HER, thus are believed to be able to replace Pt. To improve their performance suffered from limited active sites, lower exchange current density than Pt and poor conductivity, we propose a structure defined in sub-nanometer scale under good-poor solvent system. The struture exposes almost all the atoms on the surface, possesses varied electronic stuctures and can construct hierarchical structures, the exploration of the influence of these features on the performance of transition metal chalcogenide for HER is hoped to reveal the structure-activity relationship under sub-nanometer scale and further provide the opportunity to promote the development of transition meta chalcogenides.

电解水析氢材料的发展对实现氢能源取代现有化石能源具有重要的现实意义。过渡金属硫族化合物在电解水析氢反应中具有良好的催化活性，是最有希望替代贵金属Pt的一类非贵金属材料。本项目针对过渡金属硫族化合物活性暴露位点受限、交换电流密度低于Pt及导电性差等问题，拟利用良溶剂-不良溶剂合成体系构建尺寸在1nm以下的亚纳米结构，希望通过该尺度下几乎完全的表面原子暴露、丰富的表面电子结构及形成新颖多级结构等特点优化过渡金属硫族化合物的电解水析氢性能，并构建电解水析氢材料在亚纳米尺度下的构效关系，为这类材料的发展提供新的思路与机会。