Nanoparticles in a box: a concept to isolate, store and re-use colloidal surfactant-free precious metal nanoparticles

Sarah Neumann; Sarah Grotheer; Julia Tielke; Imke Schrader; Jonathan Quinson; Alessandro Zana; Mehtap Oezaslan; Matthias Arenz; Sebastian Kunz

doi:10.1039/c7ta00628d

Nanoparticles in a box: a concept to isolate, store and re-use colloidal surfactant-free precious metal nanoparticles

Sarah Neumann, Sarah Grotheer, Julia Tielke, Imke Schrader, Jonathan Quinson, Alessandro Zana, Mehtap Oezaslan, Matthias Arenz, Sebastian Kunz

Kemisk Institut

26 Citationer (Scopus)

Abstract

A concept is introduced that allows for the isolation, storage and re-use of surfactant-free precious metal nanoparticles (NPs) of catalytic relevance (Pt and Ru). “Surfactant-free NPs” well-defined in size (1–2 nm) are prepared in alkaline ethylene glycol. After synthesis these NPs are stabilized by surface bound CO, formed during synthesis by solvent oxidation, and OH−, added to the reaction mixture. We present a protocol that allows switching reversibly the stabilization between a “CO-protected” and “OH−-protected state”. Most importantly, “OH−-protected” Pt and Ru NPs exhibit remarkable resistance against sintering. These NPs can be isolated as solids, stored and “put into boxes” to be shipped. Thereafter they can be redispersed without changes in particle size or loss in catalytic activity. These results are expected to be of scientific and industrial relevance, as a methodology is introduced to handle “surfactant-free” catalytic nanoparticles like a normal solid chemical

Originalsprog	Engelsk
Tidsskrift	Journal of Materials Chemistry A
Vol/bind	5
Udgave nummer	13
Sider (fra-til)	6140-6145
Antal sider	6
ISSN	2050-7488
DOI	https://doi.org/10.1039/c7ta00628d
Status	Udgivet - 2017

Adgang til dokumentet

10.1039/c7ta00628d

Citationsformater

@article{89c7e5be21db4982bf491f0bff6d07b4,

title = "Nanoparticles in a box: a concept to isolate, store and re-use colloidal surfactant-free precious metal nanoparticles",

abstract = "A concept is introduced that allows for the isolation, storage and re-use of surfactant-free precious metal nanoparticles (NPs) of catalytic relevance (Pt and Ru). “Surfactant-free NPs” well-defined in size (1–2 nm) are prepared in alkaline ethylene glycol. After synthesis these NPs are stabilized by surface bound CO, formed during synthesis by solvent oxidation, and OH−, added to the reaction mixture. We present a protocol that allows switching reversibly the stabilization between a “CO-protected” and “OH−-protected state”. Most importantly, “OH−-protected” Pt and Ru NPs exhibit remarkable resistance against sintering. These NPs can be isolated as solids, stored and “put into boxes” to be shipped. Thereafter they can be redispersed without changes in particle size or loss in catalytic activity. These results are expected to be of scientific and industrial relevance, as a methodology is introduced to handle “surfactant-free” catalytic nanoparticles like a normal solid chemical",

author = "Sarah Neumann and Sarah Grotheer and Julia Tielke and Imke Schrader and Jonathan Quinson and Alessandro Zana and Mehtap Oezaslan and Matthias Arenz and Sebastian Kunz",

year = "2017",

doi = "10.1039/c7ta00628d",

language = "English",

volume = "5",

pages = "6140--6145",

journal = "Journal of Materials Chemistry A",

issn = "2050-7488",

publisher = "RSC Publications",

number = "13",

}

TY - JOUR

T1 - Nanoparticles in a box

T2 - a concept to isolate, store and re-use colloidal surfactant-free precious metal nanoparticles

AU - Neumann, Sarah

AU - Grotheer, Sarah

AU - Tielke, Julia

AU - Schrader, Imke

AU - Quinson, Jonathan

AU - Zana, Alessandro

AU - Oezaslan, Mehtap

AU - Arenz, Matthias

AU - Kunz, Sebastian

PY - 2017

Y1 - 2017

N2 - A concept is introduced that allows for the isolation, storage and re-use of surfactant-free precious metal nanoparticles (NPs) of catalytic relevance (Pt and Ru). “Surfactant-free NPs” well-defined in size (1–2 nm) are prepared in alkaline ethylene glycol. After synthesis these NPs are stabilized by surface bound CO, formed during synthesis by solvent oxidation, and OH−, added to the reaction mixture. We present a protocol that allows switching reversibly the stabilization between a “CO-protected” and “OH−-protected state”. Most importantly, “OH−-protected” Pt and Ru NPs exhibit remarkable resistance against sintering. These NPs can be isolated as solids, stored and “put into boxes” to be shipped. Thereafter they can be redispersed without changes in particle size or loss in catalytic activity. These results are expected to be of scientific and industrial relevance, as a methodology is introduced to handle “surfactant-free” catalytic nanoparticles like a normal solid chemical

AB - A concept is introduced that allows for the isolation, storage and re-use of surfactant-free precious metal nanoparticles (NPs) of catalytic relevance (Pt and Ru). “Surfactant-free NPs” well-defined in size (1–2 nm) are prepared in alkaline ethylene glycol. After synthesis these NPs are stabilized by surface bound CO, formed during synthesis by solvent oxidation, and OH−, added to the reaction mixture. We present a protocol that allows switching reversibly the stabilization between a “CO-protected” and “OH−-protected state”. Most importantly, “OH−-protected” Pt and Ru NPs exhibit remarkable resistance against sintering. These NPs can be isolated as solids, stored and “put into boxes” to be shipped. Thereafter they can be redispersed without changes in particle size or loss in catalytic activity. These results are expected to be of scientific and industrial relevance, as a methodology is introduced to handle “surfactant-free” catalytic nanoparticles like a normal solid chemical

U2 - 10.1039/c7ta00628d

DO - 10.1039/c7ta00628d

M3 - Journal article

SN - 2050-7488

VL - 5

SP - 6140

EP - 6145

JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

IS - 13

ER -