CO oxidation activity of Au on spinel titanate supports: Improvement of catalytic activity via alkali cation substitution from Li4Ti5O12 to Na3LiTi5O12

2021 ◽  
Author(s):  
Kohei Tada ◽  
Mitsunori Kitta ◽  
Shingo Tanaka
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Alkali Cation ◽  
Cation Substitution ◽  
Oxidation Activity

Preparation of TiO2-supported twinned gold nanoparticles by CO treatment and their CO oxidation activity

2015 ◽  
Vol 51 (87) ◽  
pp. 15823-15826 ◽  
Author(s):  
Junya Ohyama ◽  
Taiki Koketsu ◽  
Yuta Yamamoto ◽  
Shigeo Arai ◽  
Atsushi Satsuma
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Co Oxidation ◽  
Au Nanoparticles ◽  
High Catalytic Activity ◽  
Oxidation Activity

Au/TiO2 prepared by CO treatment showed high catalytic activity for CO oxidation due to twinned structure of Au nanoparticles.

scholarly journals Origin of the catalytic activity of face-centered-cubic ruthenium nanoparticles determined from an atomic-scale structure

2016 ◽  
Vol 18 (44) ◽  
pp. 30622-30629 ◽  
Author(s):  
L. S. R. Kumara ◽  
Osami Sakata ◽  
Shinji Kohara ◽  
Anli Yang ◽  
Chulho Song ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Scale Structure ◽  
Atomic Scale ◽  
Face Centered Cubic ◽  
Ruthenium Nanoparticles ◽  
Oxidation Activity ◽  
Atomic Scale Structure ◽  
Face Centered

The 3D configuration models of novel fcc and conventional hcp ruthenium nanoparticles are studied to elucidate their CO oxidation activity.

scholarly journals The influence of CePO4 nanorods on the CO oxidation activity of Au/GdPO4-rods

RSC Advances ◽  
2018 ◽  
Vol 8 (39) ◽  
pp. 21699-21711
Author(s):  
Yu Huanhuan ◽  
Chen Fayun ◽  
Zhubaolin Zhubaolin ◽  
Huang Weiping ◽  
Zhang Shoumin
Keyword(s):  
Catalytic Activity ◽  
High Temperature ◽  
Co Oxidation ◽  
Oxidation Activity ◽  
Temperature Resistance ◽  
Ultrasound Method ◽  
High Temperature Resistance ◽  
Good Catalytic Activity ◽  
Content Of Gold ◽  
Good Support

A CePO4–GdPO4 composite was prepared by a general ultrasound method and could be a good support for gold nanocatalysts. Au/CePO4–GdPO4 catalysts with a low content of gold showed good catalytic activity, high temperature resistance and stability for CO oxidation.

Ba-Addition Induced Enhanced Surface Reducibility of SrTiO3: Implication on Catalytic Aspects

2019 ◽  
Author(s):  
Noopur Jain ◽  
ahin roy ◽  
Angana De
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Oxygen Vacancies ◽  
Cation Substitution ◽  
Surface Oxygen ◽  
Chemical States ◽  
A Site ◽  
Adsorption Desorption ◽  
Enhanced Surface

This work compares the capacity of generating the surface oxygen vacancies over SrTiO<sub>3</sub>, BaTiO<sub>3</sub> and the mixed Sr<sub>0.5</sub>Ba<sub>0.5</sub>TiO<sub>3</sub>. This aspect is elucidated by significantly different chemical states of the elements on the surface of the three materials. Along with the fundamental materials aspect, CO oxidation studies complement the highest surface reducibility of the Sr<sub>0.5</sub>Ba<sub>0.5</sub>TiO<sub>3</sub> catalyst. With detailed adsorption-desorption studies, we report that the A-site cation substitution renders a better surface-reducibility induced catalytic activity for CO oxidation.

Ba-Addition Induced Enhanced Surface Reducibility of SrTiO3: Implication on Catalytic Aspects

2019 ◽  
Author(s):  
Noopur Jain ◽  
ahin roy ◽  
Angana De
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Oxygen Vacancies ◽  
Cation Substitution ◽  
Surface Oxygen ◽  
Chemical States ◽  
A Site ◽  
Adsorption Desorption ◽  
Enhanced Surface

This work compares the capacity of generating the surface oxygen vacancies over SrTiO<sub>3</sub>, BaTiO<sub>3</sub> and the mixed Sr<sub>0.5</sub>Ba<sub>0.5</sub>TiO<sub>3</sub>. This aspect is elucidated by significantly different chemical states of the elements on the surface of the three materials. Along with the fundamental materials aspect, CO oxidation studies complement the highest surface reducibility of the Sr<sub>0.5</sub>Ba<sub>0.5</sub>TiO<sub>3</sub> catalyst. With detailed adsorption-desorption studies, we report that the A-site cation substitution renders a better surface-reducibility induced catalytic activity for CO oxidation.

A mullite oxide catalyst of SmMn2O5 for three-way catalysis: synthesis, characterization, and catalytic activity evaluation

RSC Advances ◽  
2016 ◽  
Vol 6 (70) ◽  
pp. 65950-65959 ◽  
Author(s):  
Pengfei Zhao ◽  
Pengfei Yu ◽  
Zijian Feng ◽  
Rong Chen ◽  
Liwei Jia ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Oxide Catalyst ◽  
Oxidation Activity ◽  
Activity Evaluation ◽  
Co Conversion ◽  
Three Way Catalysis

CO conversion as a function of temperature for SMO and LCO is shown in the graphical abstract image. SMO reached 95% conversion at 150 °C and showed a better CO oxidation activity than LCO.

Preparation of Gold Nanoparticles Supported on Montmorillonite and its Catalytic Activity for CO Oxidation

2014 ◽  
Vol 955-959 ◽  
pp. 51-55
Author(s):  
Ting Ting Hu ◽  
Lin Hua Zhu
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Co Oxidation ◽  
Oxidation Reaction ◽  
Fluorescence Analysis ◽  
X Ray Diffraction ◽  
Oxidation Activity ◽  
X Ray ◽  
Transmission Electron ◽  
Gold Precursor

Gold catalysts supported on Na-MMT and Al-PILM noted as Au/Na-MMT and Au/Al-PILM respectively were prepared using Au(en)2Cl3 as precursor, and the catalytic oxidation activity for CO oxidation was investigated. The influence of different carriers on the conversion of CO was discussed. The phase of catalysts, the actual gold loading and the morphology of gold nanoparticles were characterized by X-ray diffraction(XRD), X-ray fluorescence analysis(XRF) and Transmission electron microscopy(TEM). The results showed that Au/Al-PILM exhibited higher catalytic activity for the oxidation reaction of CO, and 100% conversion of CO was achieved at reaction temperature of 250°C when gold precursor was loaded on the Al-PILM carrier at 60°Cand calcined it at 450°C for 1h.

Effect of thermal ageing on the structure and catalytic activity of Pd/CeO2 prepared using arc-plasma process

2014 ◽  
Vol 4 (9) ◽  
pp. 2990-2996 ◽  
Author(s):  
Satoshi Hinokuma ◽  
Hiroaki Fujii ◽  
Yasuo Katsuhara ◽  
Keita Ikeue ◽  
Masato Machida
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Thermal Ageing ◽  
Arc Plasma ◽  
Plasma Process ◽  
Oxidation Activity

High CO oxidation activity of Pd/CeO2 as prepared by using an arc-plasma process was lost by thermal ageing at 600 °C in air, whereas further ageing at 900 °C enhanced significantly the activity, exceeding that of the as-prepared catalyst.

In situ growth of small Au nanoparticles on ZnO nanorods via ultrasonic irradiation toward super-enhanced catalytic activity

RSC Advances ◽  
2016 ◽  
Vol 6 (109) ◽  
pp. 107433-107441 ◽  
Author(s):  
Xueling Song ◽  
Xiao Zhang ◽  
Ping Yang
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Ultrasonic Irradiation ◽  
Photocatalytic Performance ◽  
Au Nanoparticles ◽  
Zno Nanorods ◽  
Sonochemical Method ◽  
In Situ Growth ◽  
Oxidation Activity

Au/ZnO NRs created via a sonochemical method exhibit superior photocatalytic performance and enhanced CO oxidation activity.

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