نتایج جستجو برای: nanocatalysts

تعداد نتایج: 927  

2012
Sesha S. Srinivasan Prakash C. Sharma

Pristine complex quaternary hydride (LiBH4/2LiNH2) and its destabilized counterpart (LiBH4/2LiNH2/nanoMgH2) have recently shown promising reversible hydrogen storage capacity under moderate operating conditions. The destabilization of complex hydride via nanocrystalline MgH2 apparently lowers the thermodynamic heat values and thus enhances the reversible hydrogen storage behavior at moderate te...

Journal: :Journal of the American Chemical Society 2009
Zhufang Liu Jenny E Hu Qi Wang Karen Gaskell Anatoly I Frenkel Gregory S Jackson Bryan Eichhorn

PtMo alloy and MoO(x)@Pt core-shell nanoparticles (NPs) were successfully synthesized by a chemical coreduction and sequential chemical reduction method, respectively. Both the carbon-supported alloy and core-shell NPs show substantially higher CO tolerance, compared to the commercialized E-TEK PtRu alloy and Pt catalyst. These novel nanocatalysts can be potentially used as highly CO-tolerant a...

Journal: :international journal of nanoscience and nanotechnology 2015
s. l. sharifi m. h. hosseini a. mirzaei a. salmani oskuloo

the special application of iron-manganese oxide nanocatalysts has been investigated in decomposition of hydrogen peroxide. in this research, iron-manganese oxide nanocomposites were synthesized by co-precipitation, sol-gel and mechanochemical methods using iron (iii) nitrate, iron (ii) sulfate and manganese (ii) nitrate as starting materials. these nanocomposites were prepared on the various ca...

Journal: :international journal of bio-inorganic hybrid nanomaterials 0

in this research iron manganese oxide nanocomposites were prepared by co-precipitation, sol-gel and mechanochemical methods by using iron (iii) nitrate, iron (ii) sulfate and manganese (ii) nitrate as starting materials. these nanocomposites were prepared in the presence of various catalyst beds. the polyvinyl pyrrolidon (pvp) was used as a capping agent to control the agglomeration of the nano...

Journal: :ACS Nano 2021

While numerous efforts have been made toward the design of sustainable and efficient nanocatalysts hydrogen evolution reaction, there is a need for operando observation quantificatio...

2007
Abdul Rahman Mohamed Minoo Tasbihi Siang-Piao Chai

Catalysts daily accelerate and boost thousands of different chemical reactions, and thereby form the basis for the multibillion dollar chemical industry worldwide and indispensable environmental protective technologies. Research in nanotechnology and nanoscience is expected to have a great impact on the development of new catalysts. The detailed understanding of chemistry of nanostructures and ...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2015
Yuwei Zhang J Matthew Lucas Ping Song Brandon Beberwyck Qiang Fu Weilin Xu A Paul Alivisatos

For the practical application of nanocatalysts, it is desirable to understand the spatiotemporal fluctuations of nanocatalytic activity at the single-nanoparticle level. Here we use time-lapsed superresolution mapping of single-molecule catalysis events on individual nanoparticles to observe time-varying changes in the spatial distribution of catalysis events on Sb-doped TiO2 nanorods and Au tr...

Journal: :Nanoscale 2015
V Romero I Costas-Mora I Lavilla C Bendicho

In this work, a simple route for the synthesis of surfactant-free immobilized palladium nanoparticles (Pd NPs) and their use as effective nanocatalysts for metal hydride decomposition is described. A mixture of ethanol : water was used as the reducing agent. Ethanol was added in a large excess to reduce the ionic Pd and stabilize the obtained Pd NPs. Ethanol is adsorbed on the surface of Pd all...

Journal: :Chemical communications 2010
Ekaterina V Skorb Helmuth Möhwald Torsten Irrgang Andreas Fery Daria V Andreeva

A one-step method was developed to produce metal nanocomposites from metal alloys under ultrasound irradiation. Systematic investigation of ultrasound effects on various metal particles reveals cavitation-induced recrystallization and oxidation of metals as main factors in the process. The fact that different metals react in dramatically different fashion towards ultrasound irradiation was expl...

2016

This work involves the degradation of plastic waste in the presence of three different nanocatalysts. A thin film of LLDPE was formed with all three nanocatalysts separately in the solvent. Thermo Gravimetric Analysis (TGA) and Differential Scanning Calorimetric (DSC) analysis of polymers suggest that the presence of these catalysts lowers the degradation temperature and the change mechanism of...

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