Absence of a pressure gap and atomistic mechanism of the oxidation of pure Co nanoparticles

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F23%3A00567955" target="_blank" >RIV/61388955:_____/23:00567955 - isvavai.cz</a>

Result on the web

<a href="https://hdl.handle.net/11104/0339263" target="_blank" >https://hdl.handle.net/11104/0339263</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41467-023-35846-0" target="_blank" >10.1038/s41467-023-35846-0</a>

Result language

angličtina

Original language name

Absence of a pressure gap and atomistic mechanism of the oxidation of pure Co nanoparticles

Original language description

Understanding chemical reactivity and magnetism of 3d transition metal nanoparticles is of fundamental interest for applications in fields ranging from spintronics to catalysis. Here, we present an atomistic picture of the early stage of the oxidation mechanism and its impact on the magnetism of Co nanoparticles. Our experiments reveal a two-step process characterized by (i) the initial formation of small CoO crystallites across the nanoparticle surface, until their coalescence leads to structural completion of the oxide shell passivating the metallic core, (ii) progressive conversion of the CoO shell to Co3O4 and void formation due to the nanoscale Kirkendall effect. The Co nanoparticles remain highly reactive toward oxygen during phase (i), demonstrating the absence of a pressure gap whereby a low reactivity at low pressures is postulated. Our results provide an important benchmark for the development of theoretical models for the chemical reactivity in catalysis and magnetism during metal oxidation at the nanoscale.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10403 - Physical chemistry

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

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

Name of the periodical

Nature Communications

ISSN

2041-1723

e-ISSN

2041-1723

Volume of the periodical

14

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

11

Pages from-to

174

UT code for WoS article

000955726400021

EID of the result in the Scopus database

2-s2.0-85146195032