Tailored surface composition of Au/Pt nanocatalysts synthesized in microemulsions: a simulation study.
Journal
RSC advances
ISSN: 2046-2069
Titre abrégé: RSC Adv
Pays: England
ID NLM: 101581657
Informations de publication
Date de publication:
17 Nov 2020
17 Nov 2020
Historique:
received:
25
09
2020
accepted:
13
11
2020
entrez:
6
5
2022
pubmed:
19
11
2020
medline:
19
11
2020
Statut:
epublish
Résumé
Au/Pt nanoparticles show an optimized catalytic activity when compared with Pt nanoparticles because Pt activity is improved by the presence of Au on the surface. It was checked whether a controllable surface composition can be achieved by the simple strategy of varying the Au : Pt ratio. We present an in-depth kinetic simulation study on the influence of Au : Pt ratio on the formation of Au/Pt nanoparticles synthesized in microemulsions. This study is able to explain the resulting nanoarrangement as a function of kinetic parameters such as Au : Pt ratio and intermicellar exchange rate. The role of the micelles as a dosing pump of the Au precursor explains that a higher Au amount results in a Au reduction which takes place over a longer period of time. It implies that Au is deposited until longer stages of the synthesis, so Au is present at the nanoparticle surface. Micelles as reaction media produce a minor impact on Pt due to its slower reduction. These different kinetic behaviours of Au and Pt give rise to a surface composition which can be tailored by tuning the Au : Pt ratio. Numerical results on surface composition successfully reproduce experimental data and further support the outcomes of the degree of atomic mixing under different Au : Pt ratios.
Identifiants
pubmed: 35516746
doi: 10.1039/d0ra08227a
pii: d0ra08227a
pmc: PMC9057839
doi:
Types de publication
Journal Article
Langues
eng
Pagination
42277-42286Informations de copyright
This journal is © The Royal Society of Chemistry.
Déclaration de conflit d'intérêts
There are no conflicts to declare.
Références
J Am Chem Soc. 2010 Aug 4;132(30):10398-406
pubmed: 20662517
Chem Commun (Camb). 2012 Oct 4;48(76):9531-3
pubmed: 22898799
Phys Chem Chem Phys. 2011 Mar 7;13(9):4083-94
pubmed: 21229152
Chem Sci. 2019 Mar 12;10(14):4054-4061
pubmed: 31015946
Acc Chem Res. 2018 Aug 21;51(8):1764-1773
pubmed: 29984987
Nanoscale Res Lett. 2015 Dec;10(1):1048
pubmed: 26303140
J Colloid Interface Sci. 2018 Jan 15;510:152-161
pubmed: 28942165
J Colloid Interface Sci. 2014 Feb 1;415:57-69
pubmed: 24267330
Langmuir. 2018 Aug 21;34(33):9754-9761
pubmed: 30060663
J Am Chem Soc. 2013 May 29;135(21):7985-91
pubmed: 23646922
Langmuir. 2015 Jul 14;31(27):7435-9
pubmed: 26035721
J Phys Chem B. 2006 Jan 19;110(2):812-9
pubmed: 16471608
J Colloid Interface Sci. 2004 Jun 15;274(2):355-64
pubmed: 15144806
J Colloid Interface Sci. 2006 Jan 15;293(2):414-20
pubmed: 16061244
ACS Appl Mater Interfaces. 2014 Dec 24;6(24):21946-53
pubmed: 25456348
J Am Chem Soc. 2005 Jan 12;127(1):357-65
pubmed: 15631486
J Am Chem Soc. 2018 Oct 3;140(39):12434-12441
pubmed: 30129750
Phys Chem Chem Phys. 2009 May 14;11(18):3573-9
pubmed: 19421563
Nat Mater. 2018 Nov;17(11):1033-1039
pubmed: 30250176