scholarly journals Acid-Alkali-Treated Natural Mordenite-Supported Platinum Nanoparticles (Pt/MORn-H-OH) for Efficient Catalytic Oxidation of Formaldehyde at Room Temperature

2019 ◽  
Vol 2019 ◽  
pp. 1-5
Author(s):  
Xiaoya Gao ◽  
Qian Guo ◽  
Yuan Zhou ◽  
Dedong He ◽  
Yongming Luo
Keyword(s):  
Catalytic Activity ◽  
Catalytic Oxidation ◽  
Crystalline Phase ◽  
Room Temperature ◽  
Alkali Treatment ◽  
Pt Nanoparticles ◽  
Pt Catalysts ◽  
Step Method ◽  
Oxidation Activity ◽  
Supported Platinum

In this work, a series of natural mordenite-supported platinum (Pt) catalysts were prepared by a facile two-step method, namely, treatment of natural mordenite and then the loading of Pt nanoparticles. The acid-alkali-treated natural mordenite-supported Pt samples (1% Pt/MORn-H-OH) exhibited the highly enhanced catalytic oxidation activity of formaldehyde (HCHO) at room temperature. XRD results showed that the crystalline phase of the mordenite did not change significantly in 1% Pt/MORn-H-OH catalyst. However, the acid-alkali treatment endowed the Pt particles excellent dispersion with the smallest diameter of 2.8 nm in a high loading content, which contributed to the optimal catalytic activity of 1% Pt/MORn-H-OH.

Synthesis and Catalytic Activity Studies of V/K/Ca and V/Ks/Ce Based Catalysts for Diesel Soot Oxidation

2007 ◽  
Vol 336-338 ◽  
pp. 1995-1998
Author(s):  
Yong Heng Zhang ◽  
Jian Zhong Xue
Keyword(s):  
Catalytic Activity ◽  
Catalytic Oxidation ◽  
Amorphous Phase ◽  
Porous Alumina ◽  
Soot Oxidation ◽  
Diesel Soot ◽  
Oxidation Activity ◽  
Diesel Soot Oxidation ◽  
Oxidation Onset Temperature ◽  
Catalyst Systems

The catalysts based on V/K/Ca and V/Ks/Ce systems for diesel soot catalytic oxidation were synthesized onto the porous alumina substrates. Both catalyst systems showed a good catalytic oxidation activity. The V/K/Ca system exhibited the lowest oxidation onset temperature (OOT) of about 359oC with a composition of V/K/Ca =1:1:0.1 where the V and Ca and/or K elements could form a kind of amorphous phase that determined the catalytic activity. The V/Ks/Ce system displayed the lowest OOT of about 350oC with a composition of V/Ks/Ce = 1:2:0.1 where the K2SO4 and K5V2O3(SO4)4 phases could contribute most to the catalytic activity.

Hollow structured CoSn(OH)6-supported Pt for effective room-temperature oxidation of gaseous formaldehyde

2016 ◽  
Vol 09 (06) ◽  
pp. 1642009 ◽  
Author(s):  
Jing Zhou ◽  
Yong Zhao ◽  
Lifan Qin ◽  
Chen Zeng ◽  
Wei Xiao
Keyword(s):  
Electron Microscopy ◽  
Catalytic Activity ◽  
Room Temperature ◽  
Synergetic Effect ◽  
Hollow Structure ◽  
Pt Nanoparticles ◽  
Hydroxyl Groups ◽  
High Catalytic Activity ◽  
Temperature Oxidation ◽  
X Ray

Uniform CoSn(OH)6 hollow nanoboxes and the derivative with Pt loading (Pt/CoSn(OH)6) were herein synthesized and characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). SEM and TEM analyses showed that CoSn(OH)6 possessed mesoporous hollow structure and Pt nanoparticles with size of 2–8[Formula: see text]nm were uniformly dispersed on the surface of CoSn(OH)6 nanoboxes. The performances of the catalysts for the formaldehyde (HCHO) removal at room temperature were evaluated. These Pt/CoSn(OH)6 catalysts exhibited a remarkable catalytic activity as well as stability for room-temperature oxidative decomposition of gaseous HCHO, while the corresponding CoSn(OH)6 only showed adsorption. The synergetic effect between the highly dispersed Pt nanoparticles and the CoSn(OH)6 nanoboxes with mesoporous hollow structure, a large surface area and abundant surface hydroxyl groups is considered to be the main reason for the observed high catalytic activity of Pt/CoSn(OH)6.

Dual-dehydrogenation-promoted catalytic oxidation of formaldehyde on alkali-treated Pt clusters at room temperature

2015 ◽  
Vol 3 (19) ◽  
pp. 10432-10438 ◽  
Author(s):  
Peng Zhou ◽  
Jiaguo Yu ◽  
Longhui Nie ◽  
Mietek Jaroniec
Keyword(s):  
Catalytic Oxidation ◽  
Room Temperature ◽  
Pt Catalysts

Dual dehydrogenation of HCHO molecules can promote the activation of O2 molecules and regeneration of Pt catalysts.

Ni–Pt nanoparticles growing on metal organic frameworks (MIL-96) with enhanced catalytic activity for hydrogen generation from hydrazine at room temperature

2015 ◽  
Vol 44 (13) ◽  
pp. 6212-6218 ◽  
Author(s):  
Lan Wen ◽  
Xiaoqiong Du ◽  
Jun Su ◽  
Wei Luo ◽  
Ping Cai ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Room Temperature ◽  
Hydrogen Generation ◽  
Metal Organic Frameworks ◽  
Pt Nanoparticles ◽  
Metal Organic ◽  
Hydrogen Selectivity

3.2 nm NiPt nanoparticles have been successfully grown on the surface of MIL-96, which exhibit 100% hydrogen selectivity and the highest catalytic activity toward dehydrogenation of hydrazine with TOF value of 114.3 h−1 at room temperature.

scholarly journals Catalytic Performance of Toluene Combustion over Pt Nanoparticles Supported on Pore-Modified Macro-Meso-Microporous Zeolite Foam

Nanomaterials ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 30 ◽  
Author(s):  
Sibei Zou ◽  
Mingyuan Zhang ◽  
Shengpeng Mo ◽  
Hairong Cheng ◽  
Mingli Fu ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Catalytic Oxidation ◽  
Catalytic Combustion ◽  
Diffusion Rate ◽  
Pt Nanoparticles ◽  
Catalytic Performance ◽  
Acid Etching ◽  
Impregnation Method ◽  
Oxidation Activity ◽  
Microporous Zeolite

Herein, to investigate the pore effect on toluene catalytic oxidation activity, novel supports for Pt nanoparticles—ZSM-5 foam (ZF) fabricated using polyurethane foam (PUF) templates and pore-modified ZSM-5 foam (ZF-D) treated by acid etching, comparing with conventional ZSM-5 and pore-modified ZSM-5 (ZSM-5-D), were successfully synthesized. Pt nanoparticles were loaded on series ZSM-5 supports by the impregnation method. The Pt loaded on ZF-D (Pt/ZF-D) showed the highest activity of toluene catalytic combustion (i.e., T90 = 158 °C), with extraordinary stability and an anti-coking ability. Based on various catalysts characterizations, the unique macropores of ZF facilitated the process of acid etching as compared to conventional ZSM-5. The mesopores volume of ZF-D significantly increased due to acid etching, which enlarged toluene adsorption capacity and led to a better Pt distribution since some Pt nanoparticles were immobilized into some mesopores. Specifically, the microporous distribution was centered in the range of 0.7–0.8 nm close to the molecular diameter of toluene (ca. 0.67 nm), which was key to the increasing toluene diffusion rate due to pore levitation effect of catalysts and accessibility of metal. Furthermore, the reducibility of Pt nanoparticles was improved on Pt/ZF-D, which enhanced the activity of toluene catalytic oxidation.

scholarly journals Investigation on CO catalytic oxidation reaction kinetics of faceted perovskite nanostructures loaded with Pt

RSC Advances ◽  
2017 ◽  
Vol 7 (10) ◽  
pp. 6102-6107 ◽  
Author(s):  
S. M. Yin ◽  
J. J. Duanmu ◽  
Y. H. Zhu ◽  
Y. F. Yuan ◽  
S. Y. Guo ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Reaction Kinetics ◽  
Catalytic Oxidation ◽  
Lead Titanate ◽  
Oxidation Reaction ◽  
Pt Nanoparticles ◽  
Crystal Facet ◽  
Co Catalytic Oxidation ◽  
Titanate Nanostructures ◽  
Kinetics Of

Perovskite lead titanate nanostructures with specific {111}, {100} and {001} facets exposed, have been employed as supports to investigate the crystal facet effect on the growth and CO catalytic activity of Pt nanoparticles.

Electrochemical Characteristics of Carbon-Supported Metal Nanoparticles Catalysts Prepared by Electrical Deposition Methods

2007 ◽  
Vol 124-126 ◽  
pp. 1821-1824 ◽  
Author(s):  
Seok Kim ◽  
Yongju Jung ◽  
Young Seak Lee ◽  
Soo Jin Park
Keyword(s):  
Pt Nanoparticles ◽  
Electrochemical Characteristics ◽  
Pt Catalysts ◽  
Applied Potential ◽  
Potential Sweep ◽  
Loading Level ◽  
Graphite Nanofibers ◽  
Electrochemical Condition ◽  
Supported Platinum ◽  
Supported Metal Nanoparticles

Graphite nanofibers (GNFs)–supported platinum (Pt) catalysts had been prepared by an electrochemical deposition by controlling an applied potential to a potential of Pt reduction. Pt nanoparticles were successfully deposited by using potential sweep methods. The catalyst prepared by 18 sweep times showed the lowest resistance and the highest electroactivity. These electrochemical properties were dependent on the size, loading level, and morphology of catalysts. The influences of electrochemical condition on the sizes and loading level of catalysts were also investigated.

Pt Nanoparticles Supported on N/Ce-Doped Activated Carbon for the Catalytic Oxidation of Formaldehyde at Room Temperature

2020 ◽  
Vol 3 (3) ◽  
pp. 2614-2624 ◽  
Author(s):  
Wenjing Bao ◽  
Hongxia Chen ◽  
Hao Wang ◽  
Runduo Zhang ◽  
Ying Wei ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Catalytic Oxidation ◽  
Room Temperature ◽  
Pt Nanoparticles
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