| 报告题目 | Active site self-optimization by irreversible phase transition of 1T-MoS2 in photocatalytic hydrogen evolution: A joint experimental and theoretical study |
| 报告人 | 裴勇 教授 |
| 报告人单位 | 湖南湘潭大学 |
| 报告时间 | 2017-09-20 |
| 报告地点 | 合肥微尺度物质科学国家实验室九楼会议室（9004） |
| 主办单位 | 合肥微尺度物质科学国家实验室 |
| 报告介绍 | 报告摘要：
As a promising non-noble-metal material for hydrogen evolution reaction (HER), the MoS2 has received significant research interests. The pristine MoS2 is known to contain a catalytically inert basal plane. Activating the basal planes of MoS2 via a phase structure engineering strategy could further improve its catalytic activity in the HER activity. However, the fundamental mechanism about the activity enhancement of MoS2 remained unclear. Here, we report preparation of a highly stable 1T phase MoS2 incorporated in the 1H MoS2 nanosheets by controlling surface atomic vacancy and strain. The joint experimental and theoretical results revealed that the 1T-MoS2 transformed into the distorted 1T’ phase driven by the hydrogen atom adsorption. The superior catalytic activity of MoS2 in the photochemical environment is attributed to the formation of 1T’ phase. These studies suggest a novel catalytic mechanism of the metallic 1T-MoS2. That is, the active sites are self-optimizing” in the process of catalytic reactionwas put forward.This work deepens the understanding the phase transformation engineering enhance the PHER process.
报告人简介：
“先进光电与超分子功能材料”教育部创新团队负责人。
主要研究方向为低维材料如半导体表面自组装单层分子膜、配体保护贵金属原子簇及纳米线、类石墨烯二维纳米材料等的结构、电子结构、自组装行为、光学、磁性和催化性质的理论计算研究，与实验课题组开展了广泛的合作。发表SCI收录研究论文90余篇，在影响因子大于10的化学和材料top期刊如J. Am. Chem. Soc. (18篇), ACS Nano，Nano Lett.、Angew Chem. Int. Ed上发表研究论文32篇。论文他引用次数2000余次。多篇研究论文被美国化学会Chemical & Engineering News,作为研究亮点报道。 |
