Revealing high temperature stability of platinum nanocatalysts deposited on graphene oxide by in-situ TEM
文献类型：期刊论文
| 作者 | Ying, Zhehan1,2,4; Diao, Jiangyong3; Wang, Shi1,2,4; Cai, Xiangbin1,2,4; Cai, Yuan1,2; Liu, Hongyang3; Wang, Ning1,2,4 |
| 刊名 | MATERIALS CHARACTERIZATION
 |
| 出版日期 | 2020-12-01 |
| 卷号 | 170页码:8 |
| ISSN号 | 1044-5803 |
| 关键词 | In-situ TEM High temperature stability Platinum nanoparticles Graphene oxide |
| DOI | 10.1016/j.matchar.2020.110706 |
| 通讯作者 | Liu, Hongyang(liuhy@imr.ac.cn) ; Wang, Ning(phwang@ust.hk) |
| 英文摘要 | 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. |
| 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 |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE INC |
| WOS记录号 | WOS:000598508900004 |
| 资助机构 | 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 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/158853]  |
| 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, Clear Water Bay, Hong Kong, Peoples R China 2.Hong Kong Univ Sci & Technol, Dept Phys, Clear Water Bay, Hong Kong, Peoples R China 3.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 4.Hong Kong Univ Sci & Technol, William Mong Inst Nano Sci & Technol, 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. 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. |
入库方式： OAI收割
来源：金属研究所
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