Improved dehydrogenation of TiF3-doped NaAlH4 using ordered mesoporous SiO2 as a codopant

2010 ◽  
Vol 25 (10) ◽  
pp. 2047-2053 ◽  
Author(s):  
Shiyou Zheng ◽  
Yongtao Li ◽  
Fang Fang ◽  
Guangyou Zhou ◽  
Xuebin Yu ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Catalytic Mechanism ◽  
High Specific Surface Area ◽  
Temperature Range ◽  
Ordered Mesoporous ◽  
Mesoporous Sio2

A study of the influence of mesoporous SiO2 on the dehydrogenation of NaAlH4 and TiF3-doped NaAlH4 revealed that the amount of hydrogen evolved is 3.8 wt% for the pristine NaAlH4 and around 4.2 wt% for the TiF3-doped NaAlH4, but increases to 4.9–5.0 wt% once the samples are doped with mesoporous SiO2 in the temperature range of 100–350 °C. A favorable synergistic effect on the NaAlH4 dehydrogenation is achieved as mesoporous SiO2 is added as a codopant along with TiF3, which is associated with the nanosized pores and high specific surface area of mesoporous SiO2. The catalytic mechanism of mesoporous SiO2 is more physical than chemical relative to the catalytic mechanism of TiF3.

High specific surface area ordered mesoporous silica COK-12 with tailored pore size

2019 ◽  
Vol 280 ◽  
pp. 133-143 ◽  
Author(s):  
Laura M. Henning ◽  
Diego Díaz Cubas ◽  
Maria G. Colmenares ◽  
Johannes Schmidt ◽  
Maged F. Bekheet ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Specific Surface ◽  
Pore Size ◽  
Surface Area ◽  
Specific Surface Area ◽  
High Specific Surface Area ◽  
Ordered Mesoporous Silica ◽  
Ordered Mesoporous

scholarly journals Synergistic effect by high specific surface area carbon black as secondary filler in silica reinforced natural rubber tire tread compounds

2020 ◽  
Vol 81 ◽  
pp. 106173 ◽  
Author(s):  
Suppachai Sattayanurak ◽  
Kannika Sahakaro ◽  
Wisut Kaewsakul ◽  
Wilma K. Dierkes ◽  
Louis A.E.M. Reuvekamp ◽  
...  
Keyword(s):  
Carbon Black ◽  
Synergistic Effect ◽  
Natural Rubber ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
High Specific Surface Area ◽  
Rubber Tire

Mesoporous SiO2 powders with high specific surface area by microwave drying of hydrogels: A facile synthesis

2008 ◽  
Vol 108 (1-3) ◽  
pp. 333-339 ◽  
Author(s):  
Sharad D. Bhagat ◽  
Yong-Ha Kim ◽  
Gyeongbeom Yi ◽  
Young-Soo Ahn ◽  
Jeong-Gu Yeo ◽  
...  
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
High Specific Surface Area ◽  
Microwave Drying ◽  
Facile Synthesis ◽  
Mesoporous Sio2

scholarly journals N/O co-enriched graphene hydrogels as high-performance electrodes for aqueous symmetric supercapacitors

RSC Advances ◽  
2021 ◽  
Vol 11 (32) ◽  
pp. 19737-19746
Author(s):  
Yong Zhang ◽  
Liang Wei ◽  
Xijun Liu ◽  
Wenhui Ma ◽  
Jiankai Wang ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Specific Surface ◽  
Electrochemical Properties ◽  
Surface Area ◽  
Specific Surface Area ◽  
High Performance ◽  
High Specific Surface Area ◽  
Porous Structures

N/O co-enriched graphene hydrogel based supercapacitors were assembled. Owing to the synergistic effect between the heteroatoms (N, O), 3D porous structures and high specific surface area, they present excellent electrochemical properties.

Synthesis and Characterization of Platinum-Containing Ordered Mesoporous Carbon with High Specific Surface Area

2009 ◽  
Vol 79-82 ◽  
pp. 2035-2038 ◽  
Author(s):  
Zhi Hong Ji ◽  
Yan Bin Jiang ◽  
Hao Li ◽  
Li Ye ◽  
Wei Jian Han ◽  
...  
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Mesoporous Carbon ◽  
Pt Nanoparticles ◽  
High Specific Surface Area ◽  
Ordered Mesoporous Carbon ◽  
Assembly Method ◽  
Ordered Mesoporous ◽  
Platinum Particles

A Pt-containing ordered mesoporous carbon with a high specific surface area was synthesized through evaporation-induced multi-constituent co-assembly method, wherein soluble resol polymer is used as the carbon precursor, silicate oligomers as the inorganic precursor, triblock copolymer as the template, and H2PtCl6•6H2O as the Pt precursor. After thermopolymerization, the template was removed by calcinations, and silica was removed by NaOH solutions. The resultant sample was characterized by X-ray diffraction, nitrogen sorption and transmission electron microscopy. The results showed that the carbon material exhibited highly ordered mesoporous structure, with a high specific surface area of 1560 m2/g, and the pore size distributions of the sample are very narrow, centering at around 6 nm; and the platinum particles with sizes of less than 8 nm were highly distributed in the carbon matrix. The high specific surface area may be ascribed to plenty of small pores inside carbon walls caused by the removal of silica from the composites. Interaction between the Pt4+ and the resin caused the Pt species to be incorporated into the framework of the resin, which was self-assembled into an ordering structure under the direction of the surfactant. After being subjected to pyrolysis at a high temperature, the Pt4+ ions were gradually reduced to form Pt nanoparticles, which were strongly imbedded in the carbon substrate and thereby thermally stable. The removal of silica may result in the exposure of Pt nanoparticles, which render Pt nanoparticles to contact easily with reactant molecules.

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