Synthesis of Pt/Mesoporous Silica by Microwave-Assisted Method for Hydrogen Generation from Ammonia-Borane

2011 ◽  
Keyword(s):  
Mesoporous Silica ◽  
Hydrogen Generation ◽  
Ammonia Borane ◽  
Microwave Assisted ◽  
Microwave Assisted Method

Highly active and reusable silica-aerogel-supported platinum–cobalt bimetallic catalysts for the dehydrogenation of ammonia borane

RSC Advances ◽  
2016 ◽  
Vol 6 (113) ◽  
pp. 112109-112116 ◽  
Author(s):  
Pin-Ju Yu ◽  
Chia-Ching Hsieh ◽  
Po-Yu Chen ◽  
Biing-Jyh Weng ◽  
Yui Whei Chen-Yang
Keyword(s):  
Mesoporous Silica ◽  
Bimetallic Catalysts ◽  
Silica Aerogel ◽  
Chemical Reduction ◽  
Ammonia Borane ◽  
Microwave Assisted ◽  
Highly Active ◽  
Supported Platinum ◽  
Microwave Assisted Method

In this study, platinum–cobalt bimetallic catalysts supported on mesoporous silica aerogel (SAG), abbreviated as PCx/SAG,x= 1–6, were prepared by facile chemical reduction and a simple, efficient microwave-assisted method using Co and Pt precursors.

scholarly journals Ru Nanoparticles Embedded in Cubic Mesoporous Silica SBA-1 as Highly Efficient Catalysts for Hydrogen Generation from Ammonia Borane

Catalysts ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 267 ◽  
Author(s):  
Juti Rani Deka ◽  
Diganta Saikia ◽  
Kuo-Shu Hsia ◽  
Hsien-Ming Kao ◽  
Yung-Chin Yang ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Active Sites ◽  
Hydrogen Generation ◽  
Ammonia Borane ◽  
High Dispersion ◽  
High Catalytic Activity ◽  
Porous Support ◽  
H2 Generation ◽  
Ru Nanoparticles ◽  
Cubic Mesoporous

Cubic mesoporous silica SBA-1 functionalized with carboxylic acid (-COOH), namely S1B-C10, is used as a support to fabricate and confine Ru nanoparticles (NPs). The uniformly dispersed organic functional groups in SBA-1 are beneficial in attracting Ru cations, and as a result, homogenously distributed small sized Ru NPs are formed within the mesopores. The prepared Ru@S1B-C10 is utilized as a catalyst for H2 generation from the hydrolysis of ammonia borane (AB). The Ru@S1B-C10 catalyst demonstrates high catalytic activity for H2 generation (202 mol H2 molRu min−1) and lower activation energy (24.13 kJ mol−1) due to the small sized Ru NPs with high dispersion and the support’s interconnected mesoporous structure. The nanosized Ru particles provide abundant active sites for the catalytic reaction to take place, while the interconnected porous support facilitates homogenous transference and easy dispersal of AB molecules to the active sites. The catalyst demonstrates good recycle ability since the accumulation and leaking of NPs throughout catalysis can be effectively prevented by the support.

Efficient solar photo-electrochemical hydrogen generation using nanocrystalline CeFeO 3 synthesized by a modified microwave assisted method

2017 ◽  
Vol 42 (16) ◽  
pp. 10931-10942 ◽  
Author(s):  
Nilesh R. Manwar ◽  
Rajnikant G. Borkar ◽  
Rohini Khobragade ◽  
Sadhana S. Rayalu ◽  
Suman L. Jain ◽  
...  
Keyword(s):  
Hydrogen Generation ◽  
Microwave Assisted ◽  
Microwave Assisted Method

scholarly journals Preparation and application of carbon and hollow TiO2 microspheres by microwave heating at a low temperature

e-Polymers ◽  
2021 ◽  
Vol 21 (1) ◽  
pp. 200-209
Author(s):  
Caiyun Zhang ◽  
Chunhong Li ◽  
Bolin Ji ◽  
Zhaohui Jiang
Keyword(s):  
Low Temperature ◽  
Microwave Heating ◽  
Raw Material ◽  
Carbon Microspheres ◽  
Microwave Assisted ◽  
The Core ◽  
Good Crystallinity ◽  
Carbon Core ◽  
Microwave Assisted Method ◽  
Uniform Particle Size

Abstract A fast, simple, and energy-saving microwave-assisted approach was successfully developed to prepare carbon microspheres. The carbon microspheres with a uniform particle size and good dispersity were prepared using glucose as the raw material and HCl as the dehydrating agent at low temperature (90°C) in an open system with the assistance of microwave heating. The carbon microspheres were characterized by elemental analysis, XRD, SEM, FTIR, TG, and Raman. The results showed that the carbon microspheres prepared under the condition of 18.5% (v/v) HCl and heating for 30 min by microwave had a narrow size distribution. The core–shell structure of the carbon core and TiO2 shell was prepared with (NH4)2TiF6, H3BO3 using the microwave-assisted method. The hollow TiO2 microspheres with good crystallinity and high photocatalytic properties were successfully prepared by sacrificing the carbon microspheres.

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