高压下合成的新型贵金属氢化物是潜在的高温超导体，是当今科学研究的热点之一。但是,目前在贵金属氢化物的合成条件、形成机制、晶体结构及超导电性等方面还存在很大争议，而且理论计算预测结果与已有的实验结果并不完全相符。本项目主要采用金刚石对顶砧超高压原位实验测量技术，结合第一性原理计算，选取典型的贵金属元素（Ir、Os、Pt、Pd）与氢气在高压（或高温高压）条件下反应制备出高含氢的贵金属氢化物，深入理解贵金属氢化物的形成机制；系统研究其晶体结构、成键方式及电子状态，探索其在高压下的结构稳定性；确定金属化压力点和超导电性条件。该项目的实施将对贵金属氢化物的形成机制、结构稳定性及物理性质有更深层次的理解，为金属氢及超导电性的相关研究提供新的物理图像。

The novel noble metal hydrides synthesized by high pressure are considered as potential high temperature superconductors, and have become one of the hot spots of scientific research nowadays. However, there are many unsolved controversy aspects, for example the synthesis conditions, the formation mechanism, the crystal structures and the superconductivity. And the theoretical results are inconsistent with the reported experimental results. By using the ultrahigh pressure diamond anvil cell technique and in situ high pressure experimental measurements combined with first-principle theoretical calculation, this project aims to synthesize the hydrogen-rich noble metal hydrides from the typical noble metal elements (Ir, Os, Pt, Pd) with hydrogen under high pressure (or high temperature high pressure) and explore the formation mechanism of the noble metal hydrides; study the crystal structure, electronic states and bond, and explore their structural stability under high pressure; determine the metallization pressure points and superconductivity conditions. The implementation of the project will deepen the understanding of the formation mechanism, crystal structures and physical properties of noble metal hydrides, and provide new physical images of metallic hydrogen and superconductivity studies.