摘要
We choose nano-Pt in hydrogen environment to explore the size effect on the formation of metal hydrides.At 30 GPa,a phase transition in the metal lattice from the cubic to hexagonal phase is observed characterized by a drastically increased volume per metal atom,indicating the formation of PtH-P63/mmc.We find that nano-Pt could form PtH at a lower pressure than the bulk Pt due to its high specific surface and structure defects.The present work provides the possible route to new metal hydrides under mild conditions.
We choose nano-Pt in hydrogen environment to explore the size effect on the formation of metal hydrides.At30 GPa,a phase transition in the metal lattice from the cubic to hexagonal phase is observed characterized by a drastically increased volume per metal atom,indicating the formation of PtH-P63/mmc.We find that nano-Pt could form PtH at a lower pressure than the bulk Pt due to its high specific surface and structure defects.The present work provides the possible route to new metal hydrides under mild conditions.
基金
Supported by the National Natural Science Foundation of China under Grant Nos 51572108,11504127,51632002,11674122,11574112,11474127 and 11634004
the 111 Project under Grant No B12011
the Program for Chang Jiang Scholars and Innovative Research Team in University under Grant No IRT_15R23
the National Found for Fostering Talents of Basic Science under Grant No J1103202
the China Postdoctoral Science Foundation under Grant No 2016T90245
