Unraveling the real active sites of an amorphous silica–alumina-supported nickel catalyst for highly efficient ethylene oligomerization

2021 ◽  
Author(s):  
Jinghua Xu ◽  
Ruifeng Wang ◽  
Lirong Zheng ◽  
Junguo Ma ◽  
Wenjun Yan ◽  
...  
Keyword(s):  
Nickel Catalyst ◽  
Amorphous Silica ◽  
Active Sites ◽  
Ethylene Oligomerization ◽  
Supported Nickel Catalyst ◽  
The Real ◽  
Highly Efficient ◽  
Silica Alumina

The Ni+ species in a heterogeneous N2-pretreated amorphous silica–alumina-supported nickel catalyst acted as the active sites for ethylene oligomerization.

scholarly journals Ethylene Oligomerization over Nickel Supported Silica-Alumina Catalysts with High Selectivity for C10+ Products

Catalysts ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 180 ◽  
Author(s):  
Lei Chen ◽  
Guangci Li ◽  
Zhong Wang ◽  
Shuangju Li ◽  
Mingjie Zhang ◽  
...  
Keyword(s):  
Reaction Temperature ◽  
Aging Temperature ◽  
Active Sites ◽  
High Selectivity ◽  
Acid Sites ◽  
Ethylene Oligomerization ◽  
Octahedral Coordination ◽  
Activation Temperature ◽  
High Aging Temperature ◽  
Silica Alumina

The nickel (II) loading silica-alumina under various treatments in terms of aging temperature, Si/Al ratio and activation temperature were investigated by XRD, N2 adsorption-desorption, TEM, UV-Vis, NH3-TPD and XRF and then applied to catalyze the ethylene oligomerization. High aging temperature, low Si/Al ratio and high activation temperature were beneficial to high selectivity for C10+ products because of a reasonable match between Ni active sites and acid sites, high Ni loading content and less octahedral coordination Ni2+ species, respectively. Ni loading content was more important than the number of acid sites for high yield of C10+ products, and less octahedral coordination Ni2+ species favored less by-products produced at high reaction temperature. In addition, other experimental conditions, such as reaction temperature, weight hourly space velocity (WHSV) and nickel precursor were discussed in the paper.

Hydrodeoxygenation of angelica lactone dimers and trimers over silica-alumina supported nickel catalyst

2016 ◽  
Vol 86 ◽  
pp. 943-948 ◽  
Author(s):  
Olubunmi O. Ayodele ◽  
Folasegun A. Dawodu ◽  
Dongxia Yan ◽  
Xingmei Lu ◽  
Jiayu Xin ◽  
...  
Keyword(s):  
Nickel Catalyst ◽  
Supported Nickel Catalyst ◽  
Silica Alumina ◽  
Angelica Lactone

An Environmentally Benign, Highly Efficient Catalytic Reduction of p-Nitrophenol using a Nano-Sized Nickel Catalyst Supported on Silica-Alumina

2010 ◽  
Vol 352 (7) ◽  
pp. 1169-1178 ◽  
Author(s):  
Islam Hamdy Abd El Maksod ◽  
Eman. Z. Hegazy ◽  
Sayed. H. Kenawy ◽  
Tamer S. Saleh
Keyword(s):  
Nickel Catalyst ◽  
Catalytic Reduction ◽  
Environmentally Benign ◽  
Highly Efficient ◽  
Silica Alumina

Efficient spatial charge separation in unique 2D tandem heterojunction CdxZn1−xIn2S4–CdS–MoS2 rendering highly-promoted visible-light-induced H2 generation

2021 ◽  
Vol 9 (1) ◽  
pp. 482-491
Author(s):  
Jiakun Wu ◽  
Bowen Sun ◽  
Hui Wang ◽  
Yanyan Li ◽  
Ying Zuo ◽  
...  
Keyword(s):  
Visible Light ◽  
Charge Separation ◽  
Effective Charge ◽  
Active Sites ◽  
H2 Generation ◽  
Highly Efficient ◽  
Spatial Charge

Unique 2D heterostructures CdxZn1−xIn2S4–CdS–MoS2 with effective charge separation, excellent light-harvest, and abundant active sites are highly-efficient for photocatalytic H2 evolution.

Highly Efficient Peroxymonosulfate Activation by Surface Oxidized Nickel Phosphide with Dual Active Sites

2020 ◽  
Vol 59 (51) ◽  
pp. 22040-22048
Author(s):  
Xiaoqian Wan ◽  
Dandan Qian ◽  
Lunhong Ai ◽  
Jing Jiang
Keyword(s):  
Active Sites ◽  
Nickel Phosphide ◽  
Highly Efficient

Abundant Active Sites on the Basal Plane and Edges of Layered van der Waals Fe3GeTe2 for Highly Efficient Hydrogen Evolution

2021 ◽  
pp. 313-319
Author(s):  
Amir A. Rezaie ◽  
Eunsoo Lee ◽  
Diana Luong ◽  
Johan A. Yapo ◽  
Boniface P. T. Fokwa
Keyword(s):  
Hydrogen Evolution ◽  
Basal Plane ◽  
Active Sites ◽  
Van Der Waals ◽  
Highly Efficient
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