Facet-dependent phosphate adsorptive reactivity by lanthanum hydroxides of different crystal structure: Role of surface hydroxyl groups

2021 ◽  
Vol 538 ◽  
pp. 147910
Author(s):  
Minglu Wang ◽  
Bo Kong ◽  
Yanyang Zhang ◽  
Chao Shan ◽  
Bingcai Pan
Keyword(s):  
Crystal Structure ◽  
Hydroxyl Groups ◽  
Surface Hydroxyl ◽  
Surface Hydroxyl Groups

Defective magnesium ferrite nano-platelets for the adsorption of As(V): The role of surface hydroxyl groups

2018 ◽  
Vol 235 ◽  
pp. 11-19 ◽  
Author(s):  
Can Wu ◽  
Jingwei Tu ◽  
Chen Tian ◽  
Junjie Geng ◽  
Zhang Lin ◽  
...  
Keyword(s):  
Hydroxyl Groups ◽  
Magnesium Ferrite ◽  
Surface Hydroxyl ◽  
Surface Hydroxyl Groups

Role of surface hydroxyl groups in promoting room temperature CO sensing by Pd-modified nanocrystalline SnO2

2010 ◽  
Vol 183 (10) ◽  
pp. 2389-2399 ◽  
Author(s):  
Artem V. Marikutsa ◽  
Marina N. Rumyantseva ◽  
Lada V. Yashina ◽  
Alexander M. Gaskov
Keyword(s):  
Room Temperature ◽  
Hydroxyl Groups ◽  
Surface Hydroxyl ◽  
Surface Hydroxyl Groups

Role of Surface Hydroxyl Groups on Single-Atomic Rh1/ZrO2 Catalyst for Direct Methane Oxidation

2021 ◽  
Author(s):  
Gunjoo Kim ◽  
Gihun Kwon ◽  
Hyunjoo Lee
Keyword(s):  
Hydrothermal Treatment ◽  
Methane Oxidation ◽  
Hydroxyl Groups ◽  
Surface Hydroxyl ◽  
Surface Hydroxyl Groups ◽  
Rh Catalyst ◽  
Zro2 Catalyst

Single atomic Rh catalyst immobilized on zirconia (Rh1/ZrO2) was modified by hydrothermal treatment to have surface hydroxyl groups and used for direct methane oxidation. Both O2 and H2O2 were used...

Crystal Structure, Short-Range Oxygen Defects, and Water Adsorption in La- and Nd-Modified ZrO2

1994 ◽  
Vol 376 ◽  
Author(s):  
C.-K. Loong ◽  
J. W. Richardson ◽  
L. E. Iton ◽  
M. Ozawa
Keyword(s):  
Crystal Structure ◽  
Inelastic Neutron Scattering ◽  
High Surface ◽  
High Surface Area ◽  
Inelastic Neutron ◽  
Water Molecules ◽  
Hydroxyl Groups ◽  
Surface Hydroxyl ◽  
Oxygen Defects ◽  
Surface Hydroxyl Groups

ABSTRACTDoping Rare-earth (RE) elements to ZrO2 helps stabilize the cubic and tetragonal phases and improves resistance to thermal shock and sintering at high temperatures. Since a RE ion has a lower valency (3+) than Zr ion (4+), oxygen vacancies are formed to preserve electroneutrality. We have studied the crystal structure of La0.1Zro.9O1.95 and Nd0.1Zr0.9O1.95 by neutron diffraction and examined the associated oxygen defects by a Fourier transform of the filtered residual diffuse scattering. The hydration process was investigated by inelastic neutron-scattering measurements of the hydrogen vibrational density of states of the surface hydroxyl groups and physisorbed water on these fine powders. We compare the O-H stretch vibrations from samples with only surface hydroxyl groups to multilayer coverage of water molecules. The decreasing energies and increasing widths of the O-H stretch bands with increasing H2O coverage indicate the influence of hydrogen bonding on the motion of water molecules. Similar elastic and inelastic experiments were also performed on a high surface-area pure ZrO2 powder.

Role of acid sites and surface hydroxyl groups in isophthalonitrile hydrogenation catalyzed by supported Ni–Co catalysts

RSC Advances ◽  
2015 ◽  
Vol 5 (34) ◽  
pp. 26465-26474 ◽  
Author(s):  
Chang Liu ◽  
Ruijun Hou ◽  
Tiefeng Wang
Keyword(s):  
Acid Sites ◽  
Side Reactions ◽  
Hydroxyl Groups ◽  
Surface Hydroxyl ◽  
Co Catalysts ◽  
Surface Hydroxyl Groups ◽  
Hydrogenation Reactions ◽  
Supported Ni

For hydrogenation of isophthalonitrile, the metal sites catalyzed the hydrogenation reactions, while the acid sites (including the original and new ones) and the surface hydroxyl groups catalyzed the condensation side reactions.

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