Revealing high temperature stability of platinum nanocatalysts deposited on graphene oxide by in-situ TEM

doi:10.1016/j.matchar.2020.110706

IMR OpenIR

	Revealing high temperature stability of platinum nanocatalysts deposited on graphene oxide by in-situ TEM
	Ying, Zhehan 1,2,3; Diao, Jiangyong 4; Wang, Shi 1,2,3; Cai, Xiangbin 1,2,3; Cai, Yuan 1,2; Liu, Hongyang 4; Wang, Ning 1,2,3
通讯作者	Liu, Hongyang(liuhy@imr.ac.cn) ; Wang, Ning(phwang@ust.hk)
	2020-12-01
发表期刊	MATERIALS CHARACTERIZATION
ISSN	1044-5803
卷号	170 页码:8
摘要	This study reveals atomic-scale observations of the high temperature stability of platinum nanoparticles deposited on pristine graphene oxide (PtNPs/GO) and platinum nanoparticles deposited on water-etched graphene oxide (PtNPs/GO-H2O) as two representative catalyst systems for dehydrogenation. With the aid of in-situ transmission electron microscopy (TEM), these two kinds of catalysts can be examined at actual working temperatures up to 800 degrees C, and notably, PtNPs/GO-H2O exhibits the higher temperature stability even at 700 degrees C. The statistical data of in-situ time-lapsed TEM images demonstrate the size variations of the sintering Pt nanoparticles which are in accordance with the Ostwald ripening process. We further discover the tendency towards the preferential exposure of high-index Pt nanocrystal facets (higher surface energy sides) for the PtNPs/GO under thermal treatment from 25 degrees C to 400 degrees C, which leads to accelerate the nanoparticle aggregations, providing microscopic evidence of the catalyst instability at high temperatures.
关键词	In-situ TEM High temperature stability Platinum nanoparticles Graphene oxide
资助者	Research Grants Council of Hong Kong ; National Key R&D Program of China ; National Natural Science Foundation of China ; Liaoning Revitalization Talents Program ; Guangxi Key Laboratory of Information Materials ; Sinopec China
DOI	10.1016/j.matchar.2020.110706
收录类别	SCI
语种	英语
资助项目	Research Grants Council of Hong Kong[16306818] ; Research Grants Council of Hong Kong[N_HKUST624/19] ; National Key R&D Program of China[2016YFA0204100] ; National Natural Science Foundation of China[21961160722] ; National Natural Science Foundation of China[91845201] ; National Natural Science Foundation of China[22072162] ; Liaoning Revitalization Talents Program[XLYC1907055] ; Guangxi Key Laboratory of Information Materials[191005-K] ; Sinopec China
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing
WOS记录号	WOS:000598508900004
出版者	ELSEVIER SCIENCE INC
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/158854
专题	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, Dept Phys, Clear Water Bay, Hong Kong, Peoples R China 2.Hong Kong Univ Sci & Technol, Ctr Quantum Mat, Clear Water Bay, Hong Kong, Peoples R China 3.Hong Kong Univ Sci & Technol, William Mong Inst Nano Sci & Technol, Clear Water Bay, Hong Kong, Peoples R China 4.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Ying, Zhehan,Diao, Jiangyong,Wang, Shi,et al. Revealing high temperature stability of platinum nanocatalysts deposited on graphene oxide by in-situ TEM[J]. MATERIALS CHARACTERIZATION,2020,170:8.
APA	Ying, Zhehan.,Diao, Jiangyong.,Wang, Shi.,Cai, Xiangbin.,Cai, Yuan.,...&Wang, Ning.(2020).Revealing high temperature stability of platinum nanocatalysts deposited on graphene oxide by in-situ TEM.MATERIALS CHARACTERIZATION,170,8.
MLA	Ying, Zhehan,et al."Revealing high temperature stability of platinum nanocatalysts deposited on graphene oxide by in-situ TEM".MATERIALS CHARACTERIZATION 170(2020):8.