Journal ArticleDOI
Nanomaterials of high surface energy with exceptional properties in catalysis and energy storage
TLDR
This critical review presents a review of the progress made for producing shape-controlled synthesis of nanomaterials of high surface energy using electrochemical and wet chemistry techniques and discusses important nanommaterials such as nanocrystal catalysts based on Pt, Pd, Au and Fe, metal oxides TiO(2) and SnO( 2), as well as lithium Mn-richMetal oxides.Abstract:
The properties of nanomaterials for use in catalytic and energy storage applications strongly depends on the nature of their surfaces. Nanocrystals with high surface energy have an open surface structure and possess a high density of low-coordinated step and kink atoms. Possession of such features can lead to exceptional catalytic properties. The current barrier for widespread industrial use is found in the difficulty to synthesise nanocrystals with high-energy surfaces. In this critical review we present a review of the progress made for producing shape-controlled synthesis of nanomaterials of high surface energy using electrochemical and wet chemistry techniques. Important nanomaterials such as nanocrystal catalysts based on Pt, Pd, Au and Fe, metal oxides TiO2 and SnO2, as well as lithium Mn-rich metal oxides are covered. Emphasis of current applications in electrocatalysis, photocatalysis, gas sensor and lithium ion batteries are extensively discussed. Finally, a future synopsis about emerging applications is given (139 references).read more
Citations
More filters
Journal ArticleDOI
Shape transformation of {hk0}-faceted Pt nanocrystals from a tetrahexahedron into a truncated ditetragonal prism
Jia-Huan Du,Tian Sheng,Chi Xiao,Na Tian,Jing Xiao,Ai-Yun Xie,Shuo Liu,Zhi-You Zhou,Shi-Gang Sun +8 more
TL;DR: This study provides new insight into the nanocrystal growth habit by revealing the transformation process and mechanism of Pt nanocrystals achieved using the electrochemical square-wave potential method.
Journal ArticleDOI
Atomic structure and thermal stability of Pt–Fe bimetallic nanoparticles: from alloy to core/shell architectures
TL;DR: The results show that Pt-Fe alloy is the most stable configuration among the four types of bimetallic nanoparticles, and it has been discovered that the amorphous Fe cannot stably exist in the core and preferentially transforms into the fcc phase.
Journal ArticleDOI
An improved genetic algorithm for structural optimization of Au–Ag bimetallic nanoparticles
TL;DR: An improved genetic algorithm (IGA) is proposed to systematically investigate the structural stabilities of Au–Ag NPs, and the performance of IGA has been compared with Monte Carlo simulation method and particle swarm optimization algorithm, showing it possesses superior convergence and stability.
Journal ArticleDOI
Nickel ions inducing growth of high-index faceted α-Fe2O3 and their facet-controlled magnetic properties
TL;DR: In this article, single-crystalline α-Fe2O3 polyhedrons with high-indexed facets exposed were controllably synthesized through a simple hydrothermal route with Ni2+ ions as the structure-directing agent.
Journal ArticleDOI
Reaction Kinetic Parameters and Surface Thermodynamic Properties of Cu2O Nanocubes
TL;DR: Combined with thermochemical cycle, transition state theory, basic theory of chemical thermodynamics, and in situ microcalorimetry, reaction kinetic parameters, specific surface enthalpy, Specific surface Gibbs free energy, and specific surface entropy of Cu2O nanocubes were successfully determined.
References
More filters
Journal ArticleDOI
Gold nanoparticles: assembly, supramolecular chemistry, quantum-size-related properties, and applications toward biology, catalysis, and nanotechnology.
TL;DR: A review of gold nanoparticles can be found in this article, where the most stable metal nanoparticles, called gold colloids (AuNPs), have been used for catalysis and biology applications.
Journal ArticleDOI
Chemistry and properties of nanocrystals of different shapes.
TL;DR: The interest in nanoscale materials stems from the fact that new properties are acquired at this length scale and, equally important, that these properties are equally important.
Journal ArticleDOI
Shape‐Controlled Synthesis of Metal Nanocrystals: Simple Chemistry Meets Complex Physics?
TL;DR: A comprehensive review of current research activities that center on the shape-controlled synthesis of metal nanocrystals, including a brief introduction to nucleation and growth within the context of metal Nanocrystal synthesis, followed by a discussion of the possible shapes that aMetal nanocrystal might take under different conditions.
Journal ArticleDOI
Anatase TiO(2) single crystals with a large percentage of reactive facets
Hua Gui Yang,Chenghua Sun,Shi-Zhang Qiao,Jin Zou,Gang Liu,Sean C. Smith,Hui-Ming Cheng,Gao Qing Lu +7 more
TL;DR: This work synthesized uniform anatase TiO2 single crystals with a high percentage (47 per cent) of {001} facets using hydrofluoric acid as a morphology controlling agent and demonstrates that for fluorine-terminated surfaces this relative stability is reversed.
Journal ArticleDOI
Battery materials for ultrafast charging and discharging
Byoungwoo Kang,Gerbrand Ceder +1 more
TL;DR: It is shown that batteries which obtain high energy density by storing charge in the bulk of a material can also achieve ultrahigh discharge rates, comparable to those of supercapacitors.