| 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 Author | Liu, Hongyang(liuhy@imr.ac.cn) ; Wang, Ning(phwang@ust.hk) |
| 2020-12-01 | |
| Source Publication | MATERIALS CHARACTERIZATION
 |
| ISSN | 1044-5803 |
| Volume | 170Pages:8 |
| Abstract | 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. |
| Keyword | In-situ TEM High temperature stability Platinum nanoparticles Graphene oxide |
| Funding Organization | 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 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing |
| WOS ID | WOS:000598508900004 |
| Publisher | ELSEVIER SCIENCE INC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/158854 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Liu, Hongyang; Wang, Ning |
| Affiliation | 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 |
| 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. |
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