scholarly journals A Simple and Fast Method to Synthesize Cubic Iridium Nanoparticles with Clean Surface Free from Surfactants

Nanomaterials ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 76 ◽  
Author(s):  
Rongrong Zhang ◽  
Xuan Liu ◽  
Litong Shi ◽  
Xin Jin ◽  
Yanchao Dong ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Metal Nanoparticles ◽  
Reducing Agent ◽  
Fast Method ◽  
Clean Surface ◽  
Free Surfaces ◽  
Iridium Nanoparticles ◽  
Cu Foil

Cubic Iridium nanoparticles without any surfactants on the surface have been synthesized successfully in this work. The process of synthesis was quite simple by just injecting one drop of 400 µL solution containing Iridium precursor onto Cu foil (1 cm × 1 cm), and through galvanic reaction between the Ir precursor and Cu foil, the cubic Iridium nanoparticle could be obtained quite quickly (<30 s). The Cu foil played the roles of both reducing agent and substrate. This method could also be employed to synthesize cubic nanoparticles of other Pt-group metals such as Rh. By employing this method, cubic metal nanoparticles with surfactant-free surfaces could be produced economically and efficiently, and as a result, a realistic relationship between structure and catalytic activity could be established.

Visualization of stable ferritin complexes with palladium, rhodium and iridium nanoparticles detected by their catalytic activity in native polyacrylamide gels

2017 ◽  
Vol 46 (40) ◽  
pp. 13690-13694 ◽  
Author(s):  
Vladimir Pekarik ◽  
Marie Peskova ◽  
Roman Guran ◽  
Jiri Novacek ◽  
Zbynek Heger ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Metal Nanoparticles ◽  
Protein Complexes ◽  
Direct Visualization ◽  
Polyacrylamide Gels ◽  
Iridium Nanoparticles

Direct visualization of proteins and the catalytic activity of metal nanoparticles from metal–protein complexes in native polyacrylamide gels.

A facile approach to fabricate halloysite/metal nanocomposites with preformed and in situ synthesized metal nanoparticles: a comparative study of their enhanced catalytic activity

2015 ◽  
Vol 44 (19) ◽  
pp. 8906-8916 ◽  
Author(s):  
Sankar Das ◽  
Subhra Jana
Keyword(s):  
Catalytic Activity ◽  
Comparative Study ◽  
Metal Nanoparticles ◽  
Heterogeneous Catalysts ◽  
Cost Effective ◽  
Environmentally Benign ◽  
Metal Nanocomposites

Halloysite/metal nanocomposites have been synthesized through the immobilization of preformed and in situ synthesized metal nanoparticles over halloysite surfaces, which in turn produce efficient, cost-effective, and environmentally benign heterogeneous catalysts.

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.

scholarly journals Quasi-MOF: Exposing Inorganic Nodes to Guest Metal Nanoparticles for Drastically Enhanced Catalytic Activity

Chem ◽  
2018 ◽  
Vol 4 (4) ◽  
pp. 845-856 ◽  
Author(s):  
Nobuko Tsumori ◽  
Liyu Chen ◽  
Qiuju Wang ◽  
Qi-Long Zhu ◽  
Mitsunori Kitta ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Metal Nanoparticles

Metal Nanoparticles with clean surface: the importance and progress

2021 ◽  
pp. 100927
Author(s):  
Houkang Pu ◽  
Huizhen Dai ◽  
Te Zhang ◽  
Kaiyu Dong ◽  
Yingying Wang ◽  
...  
Keyword(s):  
Metal Nanoparticles ◽  
Clean Surface

In situ synthesis and catalytic activity in CO oxidation of metal nanoparticles supported on porous nanocrystalline silicon

2010 ◽  
Vol 36 (22) ◽  
pp. 63-70
Author(s):  
Sergej Polisski ◽  
Bernhard Goller ◽  
Karen Wilson ◽  
Dmitry Kovalev ◽  
Vladimir Zaikowskii ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Co Oxidation ◽  
Metal Nanoparticles ◽  
Nanocrystalline Silicon ◽  
In Situ Synthesis

Do polymer ligands block the catalysis of metal nanoparticles? Unexpected importance of binding motifs in improving catalytic activity

2020 ◽  
Vol 8 (31) ◽  
pp. 15900-15908 ◽  
Author(s):  
Lei Zhang ◽  
Zichao Wei ◽  
Michael Meng ◽  
Gaël Ung ◽  
Jie He
Keyword(s):  
Catalytic Activity ◽  
Metal Nanoparticles ◽  
Binding Motifs ◽  
Polymer Ligands

Polymer NHC ligands enhance the catalytic activity of metal nanoparticles despite the increase of surface crowdedness.

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