Thermal stability, ripening dynamics and coalescing microstructures of reduced graphene oxide-based platinum nanocatalysts: An in-situ TEM study

doi:10.1016/j.diamond.2021.108690

CORC > 金属研究所 > 中国科学院金属研究所

	Thermal stability, ripening dynamics and coalescing microstructures of reduced graphene oxide-based platinum nanocatalysts: An in-situ TEM study
	Ying, Zhehan 1,2,4,5; Diao, Jiangyong 3; Wang, Shi 1,2,4,5; Cai, Xiangbin 1,2,4,5; Cai, Yuan 1,4; Liu, Hongyang 3; Wang, Ning 1,2,4,5
刊名	DIAMOND AND RELATED MATERIALS
	2021-12-01
卷号	120 页码:9
关键词	High resolutions electron microscopy Thermal stability Nanostructures Amorphous carbon Nanoparticles
ISSN号	0925-9635
DOI	10.1016/j.diamond.2021.108690
通讯作者	Liu, Hongyang(liuhy@imr.ac.cn) ; Wang, Ning(phwang@ust.hk)
英文摘要	The real-time investigations of coarsening process and microstructural transformation are instrumental in elucidating the thermal stability, ripening dynamics and coalescing microstructures of metal nanocatalysts in thermocatalytic reactions. Herein, we conducted an in-situ transmission electron microscopy (TEM) study on reduced graphene oxide-based platinum nanocatalysts (Pt/rGO). The platinum nanoparticles (PtNPs) exhibited superior thermal stability on the rGO flat surface than on the wrinkle one, indicating that improving the surface flatness of graphene-based supports can increase the thermal stability of deposited metal nanocatalysts. The timeresolved analysis demonstrated that the thermal-induced microstructural transformation (graphitization) of the rGO support caused the discrepancy of PtNPs coarsening from the Ostwald ripening model. The in-situ highresolution images further revealed the coalescing microstructures of PtNPs on the graphitized rGO, which validated the previous simulation research by real-time experimental observations.
资助项目	Hong Kong Branch of South Marine Science and Engineering Guangdong Laboratory[SMSEGL20SC01] ; Research Grants Council of Hong Kong[16306818] ; RGC-NSFC[N_HKUST624/19] ; National Key R&D Program of China[2016YFA0204100] ; National Natural Science Foundation of China[91845201] ; National Natural Science Foundation of China[21961160722] ; National Natural Science Foundation of China[22072162] ; Liaoning Revitalization Talents Program[XLYC1907055] ; Guangxi Key Laboratory of Information Materials Guilin University of Electronic Technology[191005-K] ; Sinopec China
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000733665300002
资助机构	Hong Kong Branch of South Marine Science and Engineering Guangdong Laboratory ; Research Grants Council of Hong Kong ; RGC-NSFC ; National Key R&D Program of China ; National Natural Science Foundation of China ; Liaoning Revitalization Talents Program ; Guangxi Key Laboratory of Information Materials Guilin University of Electronic Technology ; Sinopec China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/173632]
专题	金属研究所_中国科学院金属研究所
通讯作者	Liu, Hongyang; Wang, Ning
作者单位	1.Hong Kong Univ Sci & Technol, Ctr Quantum Mat, Kowloon, Hong Kong, Peoples R China 2.Hong Kong Univ Sci & Technol, William Mong Inst Nano Sci & Technol, Kowloon, Hong Kong, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 4.Hong Kong Univ Sci & Technol, Dept Phys, Kowloon, Hong Kong, Peoples R China 5.Hong Kong Univ Sci & Technol, Hong Kong Branch, Southern Marine Sci & Engn Guangdong Lab Guangzho, Kowloon, Clear Water Bay, Hong Kong, Peoples R China
推荐引用方式 GB/T 7714	Ying, Zhehan,Diao, Jiangyong,Wang, Shi,et al. Thermal stability, ripening dynamics and coalescing microstructures of reduced graphene oxide-based platinum nanocatalysts: An in-situ TEM study[J]. DIAMOND AND RELATED MATERIALS,2021,120:9.
APA	Ying, Zhehan.,Diao, Jiangyong.,Wang, Shi.,Cai, Xiangbin.,Cai, Yuan.,...&Wang, Ning.(2021).Thermal stability, ripening dynamics and coalescing microstructures of reduced graphene oxide-based platinum nanocatalysts: An in-situ TEM study.DIAMOND AND RELATED MATERIALS,120,9.
MLA	Ying, Zhehan,et al."Thermal stability, ripening dynamics and coalescing microstructures of reduced graphene oxide-based platinum nanocatalysts: An in-situ TEM study".DIAMOND AND RELATED MATERIALS 120(2021):9.