Enhancing catalytic activity and stability for CO2 methanation on Ni@MOF-5 via control of active species dispersion

2015 ◽  
Vol 51 (9) ◽  
pp. 1728-1731 ◽  
Author(s):  
Wenlong Zhen ◽  
Bo Li ◽  
Gongxuan Lu ◽  
Jiantai Ma
Keyword(s):  
Catalytic Activity ◽  
Low Temperature ◽  
High Stability ◽  
Active Catalyst ◽  
Active Species ◽  
Co2 Methanation ◽  
Long Term Stability ◽  
Uniform State ◽  
Highly Dispersed

A novel high active catalyst Ni@MOF-5 showed unexpected higher activity under the low temperature for CO2 methanation. The characterization results indicated that Ni was in highly dispersed uniform state over MOF-5. This catalyst performed high stability and showed almost no deactivation in long term stability tests up to 100 h.

Highly dispersed and disordered nickel–iron layered hydroxides and sulphides: robust and high-activity water oxidation catalysts

2018 ◽  
Vol 2 (7) ◽  
pp. 1561-1573 ◽  
Author(s):  
Manjunath Chatti ◽  
Alexey M. Glushenkov ◽  
Thomas Gengenbach ◽  
Gregory P. Knowles ◽  
Tiago C. Mendes ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Low Temperature ◽  
High Activity ◽  
Water Oxidation ◽  
Microwave Assisted Synthesis ◽  
Oxidation Catalysts ◽  
Alkaline Water ◽  
Nickel Iron ◽  
Microwave Assisted ◽  
Highly Dispersed

A rapid low-temperature microwave-assisted synthesis of nickel(iron) layered hydroxides and sulphides that exhibit robust catalytic activity for electrooxidation of alkaline water is introduced.

Photochemical conversion of AgCl nanocubes to hybrid AgCl–Ag nanoparticles with high activity and long-term stability towards photocatalytic degradation of organic dyes

2012 ◽  
Vol 90 (10) ◽  
pp. 858-864 ◽  
Author(s):  
Jizhuang Wang ◽  
Changhua An ◽  
Meiyu Zhang ◽  
Chuan Qin ◽  
Xijuan Ming ◽  
...  
Keyword(s):  
Ag Nanoparticles ◽  
Environmental Remediation ◽  
Organic Dyes ◽  
Clean Energy ◽  
Active Species ◽  
Significant Loss ◽  
Term Stability ◽  
Long Term Stability ◽  
Photochemical Conversion

The performance of a photocatalytic reaction is mainly determined by the quality of the photocatalyst. For real applications, significantly enhancing the stability and activity of the photocatalysts still remains a challenge for materials scientists and chemists. In this paper, we have achieved a highly efficient plasmonic AgCl–Ag nanophotocatalyst via photochemical conversion of AgCl nanocubes. Compared with reported photocatalysts, the as-achieved nanophotocatalyst exhibits superior activity, long-term stability, and wide applicability in the decomposition of organic dye pollutants. For example, only 30 s is needed to bleach methyl orange molecules assisted by AgCl–Ag nanoparticles. Furthermore, the catalyst can be reused up to 50 times without significant loss of activity. A possible mechanism was discussed and the specified photocatalytic reactions verified that both O2•– and OH• radicals were the main active species in decomposing pollutants. The excellent performance of the present photocatalyst suggests promising applications in environmental remediation, clean energy creation, and solar cells.

scholarly journals Tunable preparation of highly dispersed NixMn-LDO catalysts derived from NixMn-LDHs precursors and application in low-temperature NH3-SCR reactions

RSC Advances ◽  
2019 ◽  
Vol 9 (42) ◽  
pp. 24377-24385 ◽  
Author(s):  
Benhui Hou ◽  
Yali Du ◽  
Xuezhen Liu ◽  
Chao Ci ◽  
Xu Wu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Uniform Distribution ◽  
Active Species ◽  
Nh3 Scr ◽  
Highly Dispersed

The NixMn-LDO catalysts derived from NixMn-LDHs precursors with uniform distribution of active species particles exhibited outstanding DeNOx performance.

Constructing highly dispersed Ni based catalysts supported on fibrous silica nanosphere for low-temperature CO2 methanation

Fuel ◽  
2020 ◽  
Vol 278 ◽  
pp. 118333 ◽  
Author(s):  
Chufei Lv ◽  
Leilei Xu ◽  
Mindong Chen ◽  
Yan Cui ◽  
Xueying Wen ◽  
...  
Keyword(s):  
Low Temperature ◽  
Co2 Methanation ◽  
Highly Dispersed ◽  
Silica Nanosphere

scholarly journals Formation of a Pd/MgO Structured Catalyst for the Aqueous Oxidation of Silane to Silanol

Catalysts ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 834 ◽  
Author(s):  
Zhou ◽  
Cao ◽  
Wang ◽  
Li
Keyword(s):  
Catalytic Activity ◽  
Pd Nanoparticles ◽  
Structured Catalysts ◽  
Long Term Stability ◽  
Plasma Electrolyte ◽  
Structured Catalyst ◽  
Aqueous Oxidation ◽  
Plasma Electrolyte Oxidation ◽  
Fabrication Parameters

The catalytic oxidation of silanes to produce silanols using water as an oxidant at mild temperatures is a major challenge in Si-H activation. Highly efficient and easy-to-recycle catalysts based on Pd nanoparticles are in high demand. In this study, Pd nanoparticles embedded in an MgO porous overlayer on an Mg plate as a structured catalyst was prepared by the plasma electrolyte oxidation (PEO) technique. The Pd/MgO catalyst is strongly anchored to the MgO plate, building a structured catalyst. Fabrication parameters such as the temperature of the electrolyte and applied voltage significantly influenced the structure of the obtained Pd/MgO catalyst and in turn its catalytic activity. The catalytic activities of Pd/MgO were evaluated by activation of a Si-H bond for catalyzing the aqueous oxidation of silanes to silanol at mild temperatures. The catalytic activity of Pd nanoparticles is favored by their electro-deficient state due to influence from the MgO substrate. The Pd/MgO catalyst exhibits good performance stability during recycling. This work paves the way for fabricating structured catalysts with long-term stability and enhanced metal–oxide interaction.

scholarly journals Cu-doped CoS2 polyhedrons with high catalytic activity and long-term stability

2020 ◽  
Vol 63 (7) ◽  
pp. 1337-1344
Author(s):  
Jie Yin ◽  
Pin Chen ◽  
Minglong Lu ◽  
Lili Song ◽  
Renyun Zhang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
High Catalytic Activity ◽  
Term Stability ◽  
Long Term Stability

Penicillin G Acylase-Fatty Lipid Biocomposite Films Show Excellent Catalytic Activity and Long Term Stability/Reusability

2002 ◽  
Vol 18 (3) ◽  
pp. 483-488 ◽  
Author(s):  
S. Phadtare ◽  
P. Parekh ◽  
A. Gole ◽  
M. Patil ◽  
A. Pundle ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Penicillin G Acylase ◽  
Penicillin G ◽  
Term Stability ◽  
Long Term Stability ◽  
Biocomposite Films

Dependence of catalytic activity and long-term stability of enzyme hydrogel films on curing time

2010 ◽  
Vol 79 (1) ◽  
pp. 142-146 ◽  
Author(s):  
Joshua Lehr ◽  
Bryce E. Williamson ◽  
Frédéric Barrière ◽  
Alison J. Downard
Keyword(s):  
Catalytic Activity ◽  
Curing Time ◽  
Term Stability ◽  
Long Term Stability ◽  
Hydrogel Films

scholarly journals An ultra-high-stability four-axis ultra-high-vacuum sample manipulator

2021 ◽  
Vol 28 (4) ◽  
Author(s):  
Marcus Agåker ◽  
Carl-Johan Englund ◽  
Peter Sjöblom ◽  
Nial Wassdahl ◽  
Pierre Fredriksson ◽  
...  
Keyword(s):  
High Stability ◽  
High Vacuum ◽  
Ultra High Vacuum ◽  
Design Parameters ◽  
Light Weight ◽  
Term Stability ◽  
Long Term Stability ◽  
Rotary Seal ◽  
Better Than

A report on a four-axis ultra-high-stability manipulator developed for use at the Veritas and Species RIXS beamlines at MAX IV Laboratory, Lund, Sweden, is presented. The manipulator consists of a compact, light-weight X–Y table with a stiffened Z tower carrying a platform with a rotary seal to which a manipulator rod holding the sample can be attached. Its design parameters have been optimized to achieve high eigen-frequencies via a light-weight yet stiff construction, to absorb forces without deformations, provide a low center of gravity, and have a compact footprint without compromising access to the manipulator rod. The manipulator system can house a multitude of different, easily exchangeable, manipulator rods that can be tailor-made for specific experimental requirements without having to rebuild the entire sample positioning system. It is shown that the manipulator has its lowest eigen-frequency at 48.5 Hz and that long-term stability is in the few tens of nanometres. Position accuracy is shown to be better than 100 nm. Angular accuracy is in the 500 nrad range with a long-term stability of a few hundred nanoradians.

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