作者:Shi, Q (Shi, Qing)[1 ]; Qiu, YP (Qiu, Yu-Ping)[1 ]; Dai, H (Dai, Hao)[1 ]; Wang, P (Wang, Ping)[1 ]
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文献类型:Article
Developing advanced catalysts ideally requires fundamental knowledge of the chemical and physical transformations occurred in the preparation process of the catalysts. Herein, we report a careful study of the formation mechanism of bimetallic nickel-platinum (Ni-Pt) nanocatalyst supported on ceria (CeO2), which was prepared by co-precipitation method. A combination of phase/structure/chemical state analyses show that the preparation process of the catalyst involves the formation of [(CH3)(4)N](2)PtCl6 and CeNi0.5Ox phases in the co-precipitation step and their phase evolution in the subsequent aging and reduction steps. The conversion of [(CH3)(4)N](2)PtCl6 to metallic Pt in the aging step is a key event in the preparation process, which exerts profound effects on the composition, microstructural feature and accordingly the catalytic property of the catalyst. These results clearly describe the formation mechanism of Ni-Pt/CeO2 catalyst, which should be significant for the rational design and controlled synthesis of high-performance catalysts for chemical hydrogen storage/generation. (C) 2019 Elsevier B.V. All rights reserved.
作者关键词:Hydrogen storage; Hydrous hydrazine; Bimetallic catalyst; Alloying; Phase evolution
KeyWords Plus:HIGHLY EFFICIENT CATALYSTS; SURFACE-COMPOSITION; H-2 GENERATION; DECOMPOSITION; NANOPARTICLES; REDUCTION; CAPACITY; GRAPHENE; CERIA; DEHYDROGENATION
通讯作者地址:Wang, P (通讯作者)
 | South China Univ Technol, Sch Mat Sci & Engn, Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Guangdong, Peoples R China. |
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| [ 1 ] South China Univ Technol, Sch Mat Sci & Engn, Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Guangdong, Peoples R China |
电子邮件地址:mspwang@scut.edu.cn
| 基金资助机构 | 授权号 |
|---|---|
| National Natural Science Foundation of China | 51671087 |
| Foundation for Innovative Research Groups of the National Natural Science Foundation of China | 51621001 |
| Foundation for Research Groups of the Natural Science Foundation of Guangdong Province | 2016A030312011 |
| Special Support Plan for National 10000-talents Program |