The surface stability and equilibrium crystal morphology of Ni2P nanoparticles and nanowires from an ab initio atomistic thermodynamic approach

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F16%3A10325130" target="_blank" >RIV/00216208:11310/16:10325130 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1039/c6ce00584e" target="_blank" >http://dx.doi.org/10.1039/c6ce00584e</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/c6ce00584e" target="_blank" >10.1039/c6ce00584e</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The surface stability and equilibrium crystal morphology of Ni2P nanoparticles and nanowires from an ab initio atomistic thermodynamic approach

Popis výsledku v původním jazyce

Knowledge of the equilibrium crystal shape and structure of the exposed surfaces of nickel phosphide (Ni2P) nanostructures is essential for understanding and control of their catalytic performance. Ab initio atomistic thermodynamics was used to investigate computationally the effects of the experimental conditions (temperature, pressure, and chemical potentials) on the relative stabilities of low-Miller index surfaces and on the equilibrium crystal morphology of Ni2P nanoparticles and nanowires. The P-covered (0001)-Ni3P2 (denoted as (0001)-A-P) surface was found to be the most stable surface at a considerably wide range of chemical potentials, whereas the (0001)-A, (10 (1) over bar1)-Ni/P and (10 (1) over bar2)-Ni/P surfaces are the thermodynamically most favored phases just in narrow chemical potential regions. The theoretical equilibrium shapes and structures of the Ni2P nanoparticles and nanowires were obtained based on the Wulff construction at various chemical potentials. The morphology of the surfaces of the Ni2P nanoparticles and nanowires does depend on the chemical potential; thus, it can be tailored for particular applications by a suitable choice of experimental conditions. The (0001), (10 (1) over bar0) and (10 (1) over bar1) side facets dominate the nanoparticle surface in a wide range of chemical potentials but other side facets can also appear at particular ranges of chemical potentials. Results reported herein give new insight into the Ni2P nanoparticle morphology showing how it depends on the experimental conditions; this information can help to tailor the surface and shape of Ni2P nanoparticles for specific applications, e.g., in catalysis.

Název v anglickém jazyce

The surface stability and equilibrium crystal morphology of Ni2P nanoparticles and nanowires from an ab initio atomistic thermodynamic approach

Popis výsledku anglicky

Knowledge of the equilibrium crystal shape and structure of the exposed surfaces of nickel phosphide (Ni2P) nanostructures is essential for understanding and control of their catalytic performance. Ab initio atomistic thermodynamics was used to investigate computationally the effects of the experimental conditions (temperature, pressure, and chemical potentials) on the relative stabilities of low-Miller index surfaces and on the equilibrium crystal morphology of Ni2P nanoparticles and nanowires. The P-covered (0001)-Ni3P2 (denoted as (0001)-A-P) surface was found to be the most stable surface at a considerably wide range of chemical potentials, whereas the (0001)-A, (10 (1) over bar1)-Ni/P and (10 (1) over bar2)-Ni/P surfaces are the thermodynamically most favored phases just in narrow chemical potential regions. The theoretical equilibrium shapes and structures of the Ni2P nanoparticles and nanowires were obtained based on the Wulff construction at various chemical potentials. The morphology of the surfaces of the Ni2P nanoparticles and nanowires does depend on the chemical potential; thus, it can be tailored for particular applications by a suitable choice of experimental conditions. The (0001), (10 (1) over bar0) and (10 (1) over bar1) side facets dominate the nanoparticle surface in a wide range of chemical potentials but other side facets can also appear at particular ranges of chemical potentials. Results reported herein give new insight into the Ni2P nanoparticle morphology showing how it depends on the experimental conditions; this information can help to tailor the surface and shape of Ni2P nanoparticles for specific applications, e.g., in catalysis.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

<a href="/cs/project/GBP106%2F12%2FG015" target="_blank" >GBP106/12/G015: Vývoj nových nanoporézních adsorbentů a katalyzátorů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

CrystEngComm

ISSN

1466-8033

e-ISSN

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Svazek periodika

18

Číslo periodika v rámci svazku

21

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

3808-3818

Kód UT WoS článku

000377085700008

EID výsledku v databázi Scopus

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