Highly dispersed Pt nanoparticles in the Cs-modified X zeolite with enhancement for toluene side-chain alkylation with methanol

2021 ◽  
Author(s):  
Zhe Hong ◽  
Xiaoxia Wang ◽  
Fangtao Huang ◽  
Lei Miao ◽  
Yanqing Huang ◽  
...  
Keyword(s):  
Pt Nanoparticles ◽  
Side Chain ◽  
Highly Dispersed ◽  
X Zeolite

Modification of Cs/X with highly dispersed Pt NPs improved the activity and durability in the side-chain alkylation of toluene.

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.

scholarly journals Effect of Fe Additives on the Catalytic Performance of Ion-Exchanged CsX Zeolites for Side-Chain Alkylation of Toluene with Methanol

Catalysts ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 829 ◽  
Author(s):  
Zhang ◽  
Yuan ◽  
Miao ◽  
Li ◽  
Shan ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Catalytic Performance ◽  
High Yield ◽  
Side Chain ◽  
Impregnation Method ◽  
Basic Sites ◽  
Lewis Acidic Sites ◽  
X Zeolite ◽  
Acidic Sites ◽  
Negative Effect

The side-chain alkylation of toluene with methanol was investigated over some Fe-modified Cs ion-exchanged X zeolite (CsX) catalysts prepared via the impregnation method using different iron sources. The absorption/activation behaviors of the reactants on the surface of the catalysts were studied by in situ Fourier-transform infrared (FT-IR) spectroscopy and temperature programmed desorption (TPD) mass measurements. Modification of CsX with a small amount of FeCl3 could result in a considerable decrease in catalytic activity, due mainly to the remarkable decrease in the density of acidic and basic sites of the catalysts. Interestingly, the Fe(NO3)3-modified CsX with an optimum Fe loading of 0.15 wt.% shows improved catalytic activity and high yield compared to the side-chain alkylation products. Modification of CsX with Fe(NO3)3 could also result in a decrease in basic sites of the catalyst. However, such a change does not bring an obvious negative effect on the adsorption/activation of toluene, while it could effectively inhibit the generation of the undesired bidentate formate. Furthermore, the introduced FeOx species (derived from the decomposition of Fe(NO3)3) may also act as new Lewis acidic sites to participate in the activation of methanol and to stabilize the formed active intermediates (i.e., unidentate formate). Therefore, modification of CsX with a suitable amount of Fe(NO3)3 may adjust its adsorption/activation ability for reagents by changing the acid–base properties of the catalyst, which can finally enhance the catalytic performance for the side-chain alkylation of toluene with methanol.

Highly dispersed Pt nanoparticles on nitrogen-doped magnetic carbon nanoparticles and their enhanced activity for methanol oxidation

Carbon ◽  
2007 ◽  
Vol 45 (13) ◽  
pp. 2496-2501 ◽  
Author(s):  
Baeck Choi ◽  
Hyeonseok Yoon ◽  
In-Su Park ◽  
Jyongsik Jang ◽  
Yung-Eun Sung
Keyword(s):  
Methanol Oxidation ◽  
Carbon Nanoparticles ◽  
Pt Nanoparticles ◽  
Nitrogen Doped ◽  
Enhanced Activity ◽  
Highly Dispersed ◽  
Magnetic Carbon

Graphene nanosheets loaded with Pt nanoparticles with enhanced electrochemical performance for sodium–oxygen batteries

2015 ◽  
Vol 3 (6) ◽  
pp. 2568-2571 ◽  
Author(s):  
Sanpei Zhang ◽  
Zhaoyin Wen ◽  
Kun Rui ◽  
Chen Shen ◽  
Yan Lu ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Hydrothermal Method ◽  
Platinum Nanoparticles ◽  
Graphene Nanosheets ◽  
Pt Nanoparticles ◽  
Highly Dispersed ◽  
Enhanced Electrochemical Performance

Graphene nanosheets loaded with highly dispersed platinum nanoparticles (Pt@GNSs) are prepared by a simple and effective hydrothermal method.

Highly dispersed Pt nanoparticles on ultrasmall EMT zeolite: A peroxidase-mimic nanoenzyme for detection of H2O2 or glucose

2020 ◽  
Vol 570 ◽  
pp. 300-311 ◽  
Author(s):  
Xiaolong Li ◽  
Xuanyu Yang ◽  
Xiaowei Cheng ◽  
Yuye Zhao ◽  
Wei Luo ◽  
...  
Keyword(s):  
Pt Nanoparticles ◽  
Zeolite A ◽  
Peroxidase Mimic ◽  
Highly Dispersed

Highly dispersed and active supported Pt nanoparticles for gaseous formaldehyde oxidation: Influence of particle size

2014 ◽  
Vol 252 ◽  
pp. 320-326 ◽  
Author(s):  
Haibao Huang ◽  
Peng Hu ◽  
Huiling Huang ◽  
Jiandong Chen ◽  
Xinguo Ye ◽  
...  
Keyword(s):  
Particle Size ◽  
Pt Nanoparticles ◽  
Highly Dispersed ◽  
Formaldehyde Oxidation ◽  
Gaseous Formaldehyde
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