scholarly journals Porous SiOC monoliths with catalytic activity by in situ formation of Ni nanoparticles in solution‐based freeze casting

2020 ◽  
Vol 103 (5) ◽  
pp. 2991-3001 ◽  
Author(s):  
Daniel Schumacher ◽  
Michaela Wilhelm ◽  
Kurosch Rezwan
Keyword(s):  
Catalytic Activity ◽  
Ni Nanoparticles ◽  
Freeze Casting ◽  
In Situ Formation

scholarly journals Ultra-Small Pd(0) Nanoparticles into a Designed Semisynthetic Lipase: An Efficient and Recyclable Heterogeneous Biohybrid Catalyst for the Heck Reaction under Mild Conditions

Molecules ◽  
2018 ◽  
Vol 23 (9) ◽  
pp. 2358 ◽  
Author(s):  
David Lopez-Tejedor ◽  
Blanca de las Rivas ◽  
Jose M. Palomo
Keyword(s):  
Catalytic Activity ◽  
Protein Structure ◽  
Heck Reaction ◽  
Catalytic Performance ◽  
Reducing Agent ◽  
Chemically Modified ◽  
Mild Conditions ◽  
In Situ Formation ◽  
Geobacillus Thermocatenulatus

A novel heterogeneous enzyme-palladium (Pd) (0) nanoparticles (PdNPs) bionanohybrid has been synthesized by an efficient, green, and straightforward methodology. A designed Geobacillus thermocatenulatus lipase (GTL) variant genetically and then chemically modified by the introduction of a tailor-made cysteine-containing complementary peptide- was used as the stabilizing and reducing agent for the in situ formation of ultra-small PdNPs nanoparticles embedded on the protein structure. This bionanohybrid was an excellent catalyst in the synthesis of trans-ethyl cinnamate by Heck reaction at 65 °C. It showed the best catalytic performance in dimethylformamide (DMF) containing 10–25% of water as a solvent but was also able to catalyze the reaction in pure DMF or with a higher amount of water as co-solvent. The recyclability and stability were excellent, maintaining more than 90% of catalytic activity after five cycles of use.

In situ formation of Ni nanoparticles supported on NiFe2O4 by calcination

2004 ◽  
Vol 177 (11) ◽  
pp. 4368-4371 ◽  
Author(s):  
Fengxi Chen ◽  
Ziyi Zhong ◽  
Xiao-Jun Xu ◽  
Yuxiang Chen
Keyword(s):  
Ni Nanoparticles ◽  
In Situ Formation

In situ reduction of well-dispersed nickel nanoparticles on hierarchical nickel silicate hollow nanofibers as a highly efficient transition metal catalyst

RSC Advances ◽  
2016 ◽  
Vol 6 (39) ◽  
pp. 32580-32585 ◽  
Author(s):  
Yang Yang ◽  
Renxi Jin ◽  
Shuo Zhao ◽  
Jihong Liu ◽  
Yunfeng Li ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Transition Metal ◽  
Nickel Nanoparticles ◽  
Metal Catalyst ◽  
Ni Nanoparticles ◽  
In Situ Reduction ◽  
Hollow Nanofibers ◽  
Transition Metal Catalyst ◽  
Nickel Silicate

Ni nanoparticles were immobilized on the hierarchically double-shell nickel silicate hollow nanofibers, the composites exhibited an excellent catalytic activity.

Self-reducing asymmetric polymer membrane for in situ formation and containment of noble metal nanocatalysts

2015 ◽  
Vol 17 (8) ◽  
pp. 4157-4161 ◽  
Author(s):  
Sankararao Chappa ◽  
Rakesh N. Shinde ◽  
Ashok K. Pandey
Keyword(s):  
Catalytic Activity ◽  
Noble Metal ◽  
Redox Reactions ◽  
Polymer Membrane ◽  
Good Catalytic Activity ◽  
In Situ Formation ◽  
Inorganic And Organic

Highly stable metal nanocatalysts formed in self-reducing asymmetric polymer membrane exhibit good catalytic activity in inorganic and organic redox reactions.

In situ assembly of well-dispersed Ni nanoparticles on silica nanotubes and excellent catalytic activity in 4-nitrophenol reduction

Nanoscale ◽  
2014 ◽  
Vol 6 (19) ◽  
pp. 11181-11188 ◽  
Author(s):  
Shenghuan Zhang ◽  
Shili Gai ◽  
Fei He ◽  
Shujiang Ding ◽  
Lei Li ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Catalytic Activity ◽  
High Catalytic Activity ◽  
Ni Nanoparticles ◽  
Small Particle Size ◽  
Reduction Strategy ◽  
Nitrophenol Reduction ◽  
Nanotube Composites ◽  
Loading Amount

Ni nanoparticle/silica nanotube composites with small particle size, good dispersion and high loading amount of Ni NPs was synthesized using an in situ thermal decomposition and reduction strategy. The composite exhibited high catalytic activity and good stability in 4-NP reduction.

In situ formation of well-dispersed palladium nanoparticles immobilized in imidazolium-based organic ionic polymers

2014 ◽  
Vol 50 (74) ◽  
pp. 10871-10874 ◽  
Author(s):  
Huaixia Zhao ◽  
Yangxin Wang ◽  
Ruihu Wang
Keyword(s):  
Catalytic Activity ◽  
Palladium Nanoparticles ◽  
Ionic Polymers ◽  
New Strategy ◽  
In Situ Formation

A new strategy for the synthesis of well-dispersed palladium nanoparticles (NPs) immobilized in imidazolium-based porous organic ionic polymers was presented in this study. The as-synthesized polymers showed excellent catalytic activity and reusability in the hydrogenation of nitroarenes without extra addition of palladium species.

scholarly journals In situ formation of reduced graphene oxide structures in ceria by combined sol–gel and solvothermal processing

2016 ◽  
Vol 7 ◽  
pp. 1815-1821 ◽  
Author(s):  
Jingxia Yang ◽  
Johannes Ofner ◽  
Bernhard Lendl ◽  
Ulrich Schubert
Keyword(s):  
Graphene Oxide ◽  
Catalytic Activity ◽  
Reduced Graphene Oxide ◽  
Sol Gel ◽  
Ceria Nanoparticles ◽  
Oxidation Activity ◽  
Reduced Graphene ◽  
In Situ Formation ◽  
Gel Processing

Raman and IR investigations indicated the presence of reduced graphene oxide (rGO)-like residues on ceria nanoparticles after solvothermal treatment in ethanol. The appearance of such structures is closely related to cerium tert-butoxide as precursor and ethanol as solvothermal solvent. The rGO-like residues improve the catalytic CO oxidation activity. This was also confirmed by introduction of “external” graphene oxide during sol–gel processing, by which the rGO structures and the catalytic activity were enhanced.

scholarly journals In-situ formation of carbon shells on the surface of Ni nanoparticles synthesized by the electric explosion of wire

2018 ◽  
pp. 513-520
Author(s):  
I.V. Beketov ◽  
A.P. Safronov ◽  
A.I. Medvedev ◽  
A.M. Murzakaev ◽  
O.R. Timoshenkova ◽  
...  
Keyword(s):  
Electric Explosion ◽  
Ni Nanoparticles ◽  
In Situ Formation

In Situ Formation of Pt-Au Nanoparticles on Magnetic Composites Carriers: Tuning Catalytic Activity by Incorporation of Different Metal Oxides

2017 ◽  
Vol 39 (1) ◽  
pp. 71-77 ◽  
Author(s):  
Zewu Zhang ◽  
Qiong Wu ◽  
Xiaohai Bu ◽  
Zusheng Hang ◽  
Zhangzhong Wang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Metal Oxides ◽  
Au Nanoparticles ◽  
Magnetic Composites ◽  
In Situ Formation

scholarly journals Dry Methane Reforming on Carbon-Doped Nickel Foams

2011 ◽  
Vol 14 (1) ◽  
pp. 9 ◽  
Author(s):  
Juan Matos ◽  
Carlos Paredes ◽  
Maibelin Rosales
Keyword(s):  
Catalytic Activity ◽  
Natural Gas ◽  
Methane Reforming ◽  
Experimental Conditions ◽  
Carbon Doped ◽  
Nickel Foams ◽  
In Situ Formation ◽  
Pre Treatment ◽  
Gas Conversion

<p>The catalytic activity of carbon-doped nickel foams in the dry methane reforming was studied at mild experimental conditions. The catalysts were synthesized by the controlled pyrolysis of different Nicontaining re-crystallized saccharose under N<sub>2</sub> flow. The results showed that carbon proportion clearly influences the catalytic activity of Ni-foams from low to moderate catalytic activity attributed to an in situ formation during pre-treatment of very active reduced Ni phases. It can be conclude that carbon-doped nickel foams catalysts prepared from the controlled pyrolysis of saccharose are interesting materials for natural gas conversion reactions.</p>

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