scholarly journals Enumerating Active Sites on Metal Nanoparticles: Understanding the Size Dependence of Cobalt Particles for CO Dissociation

ACS Catalysis ◽  
2021 ◽  
pp. 8484-8492
Author(s):  
Michel P. C. van Etten ◽  
Bart Zijlstra ◽  
Emiel J. M. Hensen ◽  
Ivo A. W. Filot
Keyword(s):  
Metal Nanoparticles ◽  
Active Sites ◽  
Size Dependence ◽  
Co Dissociation

Size dependence of the entropies of melting and crystallisation of metal nanoparticles

2018 ◽  
Vol 153 ◽  
pp. 153-158 ◽  
Author(s):  
N.Yu. Sdobnyakov ◽  
A.D. Veselov ◽  
P.M. Ershov ◽  
D.N. Sokolov ◽  
V.M. Samsonov ◽  
...  
Keyword(s):  
Metal Nanoparticles ◽  
Size Dependence

The impacts of nanotechnology on catalysis by precious metal nanoparticles

2012 ◽  
Vol 1 (1) ◽  
pp. 31-56 ◽  
Author(s):  
Rongchao Jin
Keyword(s):  
Metal Nanoparticles ◽  
Precious Metal ◽  
Metallic Nanoparticles ◽  
Active Sites ◽  
Active Surface ◽  
Catalytic Performance ◽  
Solution Phase ◽  
Future Research ◽  
Metal Support ◽  
Effect Of Surface

AbstractThis review article focuses on the impacts of recent advances in solution phase precious metal nanoparticles on heterogeneous catalysis. Conventional nanometal catalysts suffer from size polydispersity. The advent of nanotechnology has significantly advanced the techniques for preparing uniform nanoparticles, especially in solution phase synthesis of precious metal nanoparticles with excellent control over size, shape, composition and morphology, which have opened up new opportunities for catalysis. This review summarizes some recent catalytic research by using well-defined nanoparticles, including shape-controlled nanoparticles, high index-faceted polyhedral nanocrystals, nanostructures of different morphology (e.g., core-shell, hollow, etc.), bi- and multi-metallic nanoparticles, as well as atomically precise nanoclusters. Such well-defined nanocatalysts provide many exciting opportunities, such as identifying the types of active surface atoms (e.g., corner and edge atoms) in catalysis, the effect of surface facets on catalytic performance, and obtaining insight into the effects of size-induced electron energy quantization in ultra-small metal nanoparticles on catalysis. With well-defined metal nanocatalysts, many fundamentally important issues are expected to be understood much deeper in future research, such as the nature of the catalytic active sites, the metal-support interactions, the effect of surface atom arrangement, and the atomic origins of the structure-activity and the structure-selectivity relationships.

scholarly journals The quantum-chemical basis of the catalytic reactivity of transition metals

1992 ◽  
Vol 341 (1661) ◽  
pp. 269-282 ◽  
Keyword(s):  
Quantum Chemical ◽  
Oxidation Reaction ◽  
Active Sites ◽  
State Of The Art ◽  
Reaction Paths ◽  
Chemical Methods ◽  
Quantum Chemical Methods ◽  
Co Dissociation ◽  
Catalytically Active ◽  
Catalytic Reactivity

State of the art computational quantum-chemical methods enable the modelling of catalytically active sites with an accuracy of relevance to chemical predictability. This opens the possibility to predict reaction paths of elementary reaction steps on catalytically active surfaces. The results of such an approach are illustrated for a few dissociation and association reactions as they occur on transition metal surfaces. Examples to be given concern CO dissociation, carbon-carbon coupling and NH 3 oxidation. Reaction paths appear to be controlled by the principle of minimum surface atom sharing.

Identifying the time-dependent predominance regimes of step and terrace sites for the Fischer–Tropsch synthesis on ruthenium based catalysts

2016 ◽  
Vol 6 (17) ◽  
pp. 6495-6503 ◽  
Author(s):  
Dalia Liuzzi ◽  
Francisco J. Pérez-Alonso ◽  
F. Javier García-García ◽  
Federico Calle-Vallejo ◽  
José Luis G. Fierro ◽  
...  
Keyword(s):  
Active Sites ◽  
Tropsch Synthesis ◽  
Step Edge ◽  
Time Dependent ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Co Dissociation

Two types of active sites for CO dissociation exist in Ru particles. Step-edge sites deactivate during reaction.

Probing the active sites for CO dissociation on ruthenium nanoparticles

2012 ◽  
Vol 14 (22) ◽  
pp. 8005 ◽  
Author(s):  
Christian Strebel ◽  
Shane Murphy ◽  
Rasmus M. Nielsen ◽  
Jane H. Nielsen ◽  
Ib Chorkendorff
Keyword(s):  
Active Sites ◽  
Ruthenium Nanoparticles ◽  
Co Dissociation

Strategy for stabilizing noble metal nanoparticles without sacrificing active sites

2019 ◽  
Vol 55 (48) ◽  
pp. 6846-6849 ◽  
Author(s):  
Weikang Ji ◽  
Xuyu Wang ◽  
Minni Tang ◽  
Le Yang ◽  
Zebao Rui ◽  
...  
Keyword(s):  
Metal Nanoparticles ◽  
Noble Metal ◽  
Active Sites ◽  
Noble Metal Nanoparticles ◽  
Electronic Interaction ◽  
Pt Nanoparticle ◽  
Support Interaction ◽  
Metal Support Interaction ◽  
Metal Support ◽  
Surface Fluorination

We report a facile surface fluorination strategy for restricting Pt nanoparticle sintering through providing anchoring sites on the TiO2 support and enhancing metal–support interaction via improved electronic interaction without sacrificing the active sites.

Surfactant-free solution-based synthesis of metallic nanoparticles toward efficient use of the nanoparticles’ surfaces and their application in catalysis and chemo-/biosensing

2013 ◽  
Vol 2 (1) ◽  
pp. 5-25 ◽  
Author(s):  
Hideya Kawasaki
Keyword(s):  
Metal Nanoparticles ◽  
Metallic Nanoparticles ◽  
Active Sites ◽  
Metal Nanoparticle ◽  
Molar Ratio ◽  
Synthesis Methods ◽  
Ionization Mass ◽  
Free Solution ◽  
Effective Utilization ◽  
Stabilizing Agents

AbstractThe choice of stabilizer and the stabilizer-to-precursor ions molar ratio during metal nanoparticle synthesis are important for controlling the shape, size, and dispersion stability of the nanoparticles. However, the active sites on the nanoparticles surfaces may be blocked by the stabilizing agents used, resulting in a less-than-effective utilization of the surfaces. In this review, various surfactant-free solution-based methods of synthesizing metal nanoparticles are described, along with the applications of such nanoparticles in catalysis and sensing. “Surfactant-free” synthesis does not imply truly bare metal nanoparticles synthesis but implies one where the metal nanoparticles are prepared in the absence of additional stabilizing agents such as thiolate and phosphine compounds, surfactants, and polymers. These metal nanoparticles are stabilized by the solvents or the simple ions of the reducing agents or low-molecular-weight salts used. Surfactant-free synthesis of metal nanoparticles via photochemical-, ultrasonochemical-, and laser ablation-mediated synthesis methods is also described. Because of the effective utilization of their surfaces, metal nanoparticles prepared without surfactants, polymers, templates, or seeds are expected to exhibit high performance when used in catalysis (synthetic catalysis and electrocatalysis) and sensing (surface-enhanced Raman scattering (SERS)), surface-assisted laser desorption/ionization-mass spectrometry (SALDI-MS)).

N-Doped Carbon Nanosheet Networks with Favorable Active Sites Triggered by Metal Nanoparticles as Bifunctional Oxygen Electrocatalysts

2018 ◽  
Vol 3 (12) ◽  
pp. 2914-2920 ◽  
Author(s):  
Xiaoxiao Huang ◽  
Yelong Zhang ◽  
Haoming Shen ◽  
Wei Li ◽  
Tong Shen ◽  
...  
Keyword(s):  
Metal Nanoparticles ◽  
Active Sites
Sign in / Sign up

Export Citation Format

Share Document