Synthesis and characterization of Au, Pt supported on graphene aerogel catalysts for CO oxidation at low temperature

2021 ◽  
Vol 11 (1) ◽  
pp. 118-122
Author(s):  
Chuyen Phan Thi ◽  
Hang Tran Thi Thanh ◽  
Phong Pham Nam ◽  
Ha Vu Thi Thu
Keyword(s):  
Low Temperature ◽  
Ambient Temperature ◽  
Co Oxidation ◽  
Pt Nanoparticles ◽  
Molar Ratio ◽  
Synthesis And Characterization ◽  
Graphene Aerogel ◽  
Highly Dispersed ◽  
Average Size

Au, Pt supported on graphene aerogel catalysts (PtAu/rGOA) with molar ratio of Pt and Au of 1:1, and total metal concentration of 5 % were successfully synthesized by hydrothermal method.  The obtained catalysts were characterized by Raman, XRD, XPS, HR-TEM, BET. It revealed that Au and Pt nanoparticles with average size of 3 – 5 nm were highly dispersed on aerogel graphene. The activity of these catalysts was tested  in CO oxidation. The results showed that the conversion of CO at ambient temperature was 100% during 25 minutes. Accordingly, PtAu/rGOA could be considered as a potential catalysts for CO oxidation at low temperature.

One Pot Synthesis and Characterization of Ultra Fine CeO2 and Cu/CeO2 Nanoparticles. Application for Low Temperature CO Oxidation

2011 ◽  
Vol 11 (10) ◽  
pp. 8593-8598 ◽  
Author(s):  
Apostolos Fotopoulos ◽  
Jiannis Arvanitidis ◽  
Dimitris Christofilos ◽  
Konstantinos Papaggelis ◽  
M. Kalyva ◽  
...  
Keyword(s):  
Low Temperature ◽  
Co Oxidation ◽  
Synthesis And Characterization ◽  
One Pot ◽  
One Pot Synthesis ◽  
Low Temperature Co Oxidation

Synthesis and Characterization of YCrxAl1-xO3 Particles by a Reverse Micelle Processing

2017 ◽  
Vol 47 ◽  
pp. 54-59 ◽  
Author(s):  
Dae Han Lee ◽  
Ji Young Ock ◽  
Jeong Hoon Son ◽  
Dong Sik Bae
Keyword(s):  
Reverse Micelle ◽  
Heating Temperature ◽  
Molar Ratio ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
Inorganic Pigment ◽  
X Ray ◽  
Heat Treated ◽  
Average Size

YCrxAl1-xO3 nanoparticles were synthesized by a reverse micelle processing for inorganic pigment. Y(NO3)2·6H2O, Cr (NO3)2·6H2O and Al (NO3)3·9H2O are used for precursors in order to synthesis YCrxAl1-xO3 nanoparticles. The aqueous solution consists of mixing the molar ratio of Y/Cr/Al at 1:x:1-x and heat treated at 900~1300°C for 2h. The average size and distribution of synthesized YCrxAl1-xO3 powders was in the range of 10-20nm and narrow, respectively. The average size of the synthesized YCrxAl1-xO3 powders increased with increasing water to surfactant molar ratio and heating temperature. The crystallinity of synthesized YCrxAl1-xO3 powder increased with increasing heating temperature. The synthesized YCrxAl1-xO3 powders were characterized by X-ray diffraction analysis (XRD), field emission scanning electron microscopy (FE-SEM) and color spectrophotometer. The properties of the synthesized powders were affected by such variables as molar ratio, heating temperature etc.

Synthesis and Characterization of CoMn2O4 Nanopowders by a Reverse Micelle Processing

2016 ◽  
Vol 868 ◽  
pp. 105-110
Author(s):  
Dong Sik Bae
Keyword(s):  
Reverse Micelle ◽  
Molar Ratio ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Xrd Diffraction ◽  
Transmission Electron ◽  
Diffraction Patterns ◽  
Average Size

CoMn2O4 nanoparticles were synthesized by reverse micelle processing from the mixed precursor (consisting of Co (NO3)2 ·6H2O and MnCl2·4H2O). The CoMn2O4 was prepared by mixing the aqueous solution at a molar ratio of Co : Mn = 1 : 2. The synthesized powders were calcined at 600°C for 2h. The average size and distribution of synthesized powders were in the range of 10-20nm and narrow, respectively. The average size of the synthesized powders increased with increasing water to surfactant molar ratio. The XRD diffraction patterns show that the phase of CoMn2O4 was spinel (JCPDS no.77-0471). The synthesized and calcined powders were characterized by thermogravimetry-differential scanning calorimeter (TG-DSC), X-ray diffraction analysis (XRD) and transmission electron microscopy (TEM). The magnetic property of the powder was measured by Vibrating Sample Magneto-meter (VSM) at 298K. The effect of synthesis parameter, such as the molar ratio of water to surfactant, is discussed.

Synthesis and characterization of CuO/TiO2 catalysts for low-temperature CO oxidation

2006 ◽  
Vol 7 (12) ◽  
pp. 1029-1034 ◽  
Author(s):  
Jing Huang ◽  
Shurong Wang ◽  
Yingqiang Zhao ◽  
Xiaoying Wang ◽  
Shuping Wang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Co Oxidation ◽  
Synthesis And Characterization ◽  
Low Temperature Co Oxidation

Synthesis and Characterization of Ag-Pd Nanoparticles by a Reverse Micelle Process

2007 ◽  
Vol 544-545 ◽  
pp. 861-864
Author(s):  
Dong Sik Bae ◽  
Sung Kang ◽  
Kyu Seop Park ◽  
Kyong Sop Han
Keyword(s):  
Electron Microscope ◽  
Reverse Micelle ◽  
Pd Nanoparticles ◽  
Molar Ratio ◽  
Synthesis And Characterization ◽  
Diffraction Spectrum ◽  
Transmission Electron ◽  
Silver Palladium ◽  
Average Size

Preparation of Ag-Pd nanoparticles by the reduction of AgNO3 and PdCl2 with hydrazine in Igepal CO-520/cyclohexane reverse micelle solutions was studied. An analysis by transmission electron microscope and electron diffraction spectrum revealed that the resultant particles are silver-palladium. The average size of the synthesized nanoparticles slightly changed with increases in the molar ratio of water to Igepal CO 520. The average size of the synthesized nanoparticles was below 5 and they were broadly distributed.

Sign in / Sign up

Export Citation Format

Share Document