IMR OpenIR
Revealing high temperature stability of platinum nanocatalysts deposited on graphene oxide by in-situ TEM
Ying, Zhehan1,2,3; Diao, Jiangyong4; Wang, Shi1,2,3; Cai, Xiangbin1,2,3; Cai, Yuan1,2; Liu, Hongyang4; Wang, Ning1,2,3
Corresponding AuthorLiu, Hongyang(liuhy@imr.ac.cn) ; Wang, Ning(phwang@ust.hk)
2020-12-01
Source PublicationMATERIALS CHARACTERIZATION
ISSN1044-5803
Volume170Pages:8
AbstractThis 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.
KeywordIn-situ TEM High temperature stability Platinum nanoparticles Graphene oxide
Funding OrganizationResearch 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
DOI10.1016/j.matchar.2020.110706
Indexed BySCI
Language英语
Funding ProjectResearch 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 Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing
WOS IDWOS:000598508900004
PublisherELSEVIER SCIENCE INC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/158854
Collection中国科学院金属研究所
Corresponding AuthorLiu, Hongyang; Wang, Ning
Affiliation1.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
Recommended Citation
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.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Ying, Zhehan]'s Articles
[Diao, Jiangyong]'s Articles
[Wang, Shi]'s Articles
Baidu academic
Similar articles in Baidu academic
[Ying, Zhehan]'s Articles
[Diao, Jiangyong]'s Articles
[Wang, Shi]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Ying, Zhehan]'s Articles
[Diao, Jiangyong]'s Articles
[Wang, Shi]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.