共 49 条
CoNi Nanoparticles Supported on Hierarchical SAPO-34 Zeolite as a Catalyst for the Hydrolytic Dehydrogenation of Ammonia Borane
被引:4
作者:
Cong, Wenwen
[1
]
Zhang, Hongxia
[1
]
Bing, Liancheng
[1
]
Wang, Fang
[1
]
Han, Dezhi
[1
]
Wang, Guangjian
[1
]
机构:
[1] Qingdao Univ Sci & Technol, Sch Chem Engn, Qingdao 266042, Shandong, Peoples R China
关键词:
nanosized hierarchical SAPO-34;
CoNi alloys;
ammonia borane;
hydrolysis;
hydrogen storage;
CORE-SHELL NANOPARTICLES;
HIGHLY-ACTIVE CATALYSTS;
HYDROTHERMAL SYNTHESIS;
EFFICIENT CATALYSTS;
HYDROGEN GENERATION;
CARBON NANOTUBES;
PERFORMANCE;
ALLOY;
METHANOL;
NI;
D O I:
10.1021/acsanm.3c04198
中图分类号:
TB3 [工程材料学];
学科分类号:
0805 ;
080502 ;
摘要:
Highly dispersed CoNi bimetallic nanoparticles (NPs) supported on hierarchical SAPO-34 zeolite were fabricated via impregnation followed by a hydrogen reduction method for ammonia borane (NH<INF>3</INF>BH<INF>3</INF>, AB) hydrolysis to generate hydrogen. In order to investigate the effects of the Co/Ni weight ratio and zeolite synthesis procedure on the catalytic activity, Co<INF>x</INF>Ni<INF>y</INF>/SAPO-34 catalysts with various Co and Ni contents and zeolite particle sizes were prepared. It was found that Co<INF>3.33</INF>Ni<INF>1.67</INF>/SAPO-34-N containing 3.33:1.67 of the Co/Ni weight ratio and using nanosized hierarchical SAPO-34-N as support exhibited the highest catalytic activity among the investigated catalysts for the AB hydrolysis reaction, with a high turnover frequency (TOF) value of 9.25 mol<INF>H<INF>2</INF></INF>(mol<INF>metal</INF><middle dot>min)-1 at 30 degrees C, probably due to the promoted effect of nanosized hierarchical structure of SAPO-34 support on the dispersion and stabilization of CoNi particles as well as the synergistic catalysis of CoNi alloy NPs and Br & oslash;nsted acid sites. Moreover, the Co<INF>3.33</INF>Ni<INF>1.67</INF>/SAPO-34-N catalyst also displayed excellent durability, with 83% of the catalytic activity of its initial state being preserved even after five cycles.
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页码:21991 / 22000
页数:10
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