Facile synthesis of well-dispersed CeO2–CuOx composite hollow spheres with superior catalytic activity for CO oxidation

RSC Advances ◽  
2015 ◽  
Vol 5 (115) ◽  
pp. 95133-95139 ◽  
Author(s):  
Jian Zhang ◽  
Ming Gong ◽  
Yidan Cao ◽  
Chang-An Wang
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Hollow Spheres ◽  
Carbon Spheres ◽  
Facile Synthesis

Well-dispersed CeO2–CuOx composite hollow spheres have been successfully synthesized through a facile reflux method using carbon spheres as sacrificial templates.

Facile synthesis of porous Pd nanoflowers with excellent catalytic activity towards CO oxidation

2015 ◽  
Vol 23 (11) ◽  
pp. 1907-1915 ◽  
Author(s):  
Tareque Odoom-Wubah ◽  
Mingming Du ◽  
Williams Brown Osei ◽  
Daohua Sun ◽  
Jiale Huang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Facile Synthesis

Preparation, Characterization and Catalytic Activity for CO Oxidation of SiO2 Hollow Spheres Supporting CuO Catalysts

2007 ◽  
Vol 120 (3-4) ◽  
pp. 215-220 ◽  
Author(s):  
Chunyan Song ◽  
Chunling Wang ◽  
Haiyang Zhu ◽  
Xingcai Wu ◽  
Lin Dong ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Hollow Spheres

Facile synthesis of PbTiO3 truncated octahedra via solid-state reaction and their application in low-temperature CO oxidation by loading Pt nanoparticles

2014 ◽  
Vol 2 (24) ◽  
pp. 9035-9039 ◽  
Author(s):  
Simin Yin ◽  
Yihan Zhu ◽  
Zhaohui Ren ◽  
Chunying Chao ◽  
Xiang Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Solid State ◽  
Low Temperature ◽  
Co Oxidation ◽  
Solid State Reaction ◽  
Pt Nanoparticles ◽  
Facile Synthesis ◽  
Low Temperature Co Oxidation

Pt NPs have been investigated to selectively nucleate on the {111} facets of PbTiO3 truncated octahedra, exhibiting a remarkable low-temperature catalytic activity towards CO oxidation with a 100% conversion at ∼50 °C.

Facile Synthesis of Co3O4@CNT with High Catalytic Activity for CO Oxidation under Moisture-Rich Conditions

2014 ◽  
Vol 6 (14) ◽  
pp. 11311-11317 ◽  
Author(s):  
Chung-Hao Kuo ◽  
Weikun Li ◽  
Wenqiao Song ◽  
Zhu Luo ◽  
Altug S. Poyraz ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
High Catalytic Activity ◽  
Facile Synthesis

Facile synthesis of novel bowl-like hollow carbon spheres by the combination of hydrothermal carbonization and soft templating

2017 ◽  
Vol 53 (20) ◽  
pp. 2922-2925 ◽  
Author(s):  
Zili Zhang ◽  
Mingli Qin ◽  
Baorui Jia ◽  
Hongzhou Zhang ◽  
Haoyang Wu ◽  
...  
Keyword(s):  
Hollow Spheres ◽  
Hydrothermal Carbonization ◽  
Template Method ◽  
Carbon Spheres ◽  
Facile Synthesis ◽  
Soft Templating ◽  
New Strategy ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

A new strategy to synthesize novel bowl-like hollow spheres by the combination of hydrothermal carbonization and an emulsion template method was presented.

Deposition of Pd–Fe nanoparticles onto carbon spheres with controllable diameters and applied for CO catalytic oxidation

RSC Advances ◽  
2014 ◽  
Vol 4 (44) ◽  
pp. 23262-23270 ◽  
Author(s):  
Weiliang Han ◽  
Zhicheng Tang ◽  
Peng Zhang ◽  
Gongxuan Lu
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Catalytic Oxidation ◽  
Carbon Spheres ◽  
Fe Nanoparticles ◽  
Co Catalytic Oxidation

Deposition of Pd–Fe nanoparticles onto carbon spheres with controllable diameters and catalytic activity for CO oxidation.

Facile synthesis of core–shell Au@CeO2 nanocomposites with remarkably enhanced catalytic activity for CO oxidation

2012 ◽  
Vol 5 (10) ◽  
pp. 8937 ◽  
Author(s):  
Jian Qi ◽  
Jie Chen ◽  
Guodong Li ◽  
Shunxing Li ◽  
Yan Gao ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Core Shell ◽  
Facile Synthesis

Enhanced catalytic activity of low-Pt content nanocatalysts supported on hollow carbon spheres for the ORR in alkaline media

MRS Advances ◽  
2020 ◽  
Vol 5 (57-58) ◽  
pp. 2961-2972
Author(s):  
P.C. Meléndez-González ◽  
E. Garza-Duran ◽  
J.C. Martínez-Loyola ◽  
P. Quintana-Owen ◽  
I.L. Alonso-Lemus ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Anion Exchange ◽  
Average Particle Size ◽  
Synthesis Method ◽  
Alkaline Media ◽  
High Catalytic Activity ◽  
Average Particle ◽  
Carbon Spheres ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

In this work, low-Pt content nanocatalysts (≈ 5 wt. %) supported on Hollow Carbon Spheres (HCS) were synthesized by two routes: i) colloidal conventional polyol, and ii) surfactant-free Bromide Anion Exchange (BAE). The nanocatalysts were labelled as Pt/HCS-P and Pt/HCS-B for polyol and BAE, respectively. The physicochemical characterization of the nanocatalysts showed that by following both methods, a good control of chemical composition was achieved, obtaining in addition well dispersed nanoparticles of less than 3 nm TEM average particle size (d) on the HCS. Pt/HCS-B contained more Pt0 species than Pt/HCS-P, an effect of the synthesis method. In addition, the structure of the HCS remains more ordered after BAE synthesis, compared to polyol. Regarding the catalytic activity for the Oxygen Reduction Reaction (ORR) in 0.5 M KOH, Pt/HCS-P and Pt/HCS-B showed a similar performance in terms of current density (j) at 0.9 V vs. RHE than the benchmark commercial 20 wt. % Pt/C. However, Pt/HCS-P and Pt/HCS-B demonstrated a 6 and 5-fold increase in mass catalytic activity compared to Pt/C, respectively. A positive effect of the high specific surface area of the HCS and its interactions with metal nanoparticles and electrolyte, which promoted the mass transfer, increased the performance of Pt/HCS-P and Pt/HCS-B. The high catalytic activity showed by Pt/HCS-B and Pt/HCS-P for the ORR, even with a low-Pt content, make them promising cathode nanocatalysts for Anion Exchange Membrane Fuel Cells (AEMFC).

scholarly journals CO Oxidation Efficiency and Hysteresis Behavior over Mesoporous Pd/SiO2 Catalyst

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 131 ◽  
Author(s):  
Rola Mohammad Al Soubaihi ◽  
Khaled Mohammad Saoud ◽  
Myo Tay Zar Myint ◽  
Mats A. Göthelid ◽  
Joydeep Dutta
Keyword(s):  
Carbon Monoxide ◽  
Catalytic Activity ◽  
Co Oxidation ◽  
Active Sites ◽  
Bond Activation ◽  
Dissociative Adsorption ◽  
High Catalytic Activity ◽  
Good Catalytic Activity ◽  
Pretreatment Conditions ◽  
Oxidation Efficiency

Carbon monoxide (CO) oxidation is considered an important reaction in heterogeneous industrial catalysis and has been extensively studied. Pd supported on SiO2 aerogel catalysts exhibit good catalytic activity toward this reaction owing to their CO bond activation capability and thermal stability. Pd/SiO2 catalysts were investigated using carbon monoxide (CO) oxidation as a model reaction. The catalyst becomes active, and the conversion increases after the temperature reaches the ignition temperature (Tig). A normal hysteresis in carbon monoxide (CO) oxidation has been observed, where the catalysts continue to exhibit high catalytic activity (CO conversion remains at 100%) during the extinction even at temperatures lower than Tig. The catalyst was characterized using BET, TEM, XPS, TGA-DSC, and FTIR. In this work, the influence of pretreatment conditions and stability of the active sites on the catalytic activity and hysteresis is presented. The CO oxidation on the Pd/SiO2 catalyst has been attributed to the dissociative adsorption of molecular oxygen and the activation of the C-O bond, followed by diffusion of adsorbates at Tig to form CO2. Whereas, the hysteresis has been explained by the enhanced stability of the active site caused by thermal effects, pretreatment conditions, Pd-SiO2 support interaction, and PdO formation and decomposition.

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