Heat-Up Colloidal Synthesis of Shape-Controlled Cu-Se-S Nanostructures-Role of Precursor and Surfactant Reactivity and Performance in N Electroreduction
Mourdikoudis, Stefanos (University of Chemistry and Technology Prague. Department of Inorganic Chemistry)
Antonaropoulos, George (University of Crete. Department of Chemistry)
Antonatos, Nikolas (University of Chemistry and Technology Prague. Department of Inorganic Chemistry)
Rosado, Marcos (Institut Català de Nanociència i Nanotecnologia)
Storozhuk, Liudmyla (University College London. Department of Physics and Astronomy)
Takahashi, Mari (Japan Advanced Institute of Science and Technology. School of Materials Science)
Maenosono, Shinya (Japan Advanced Institute of Science and Technology. School of Materials Science)
Luxa, Jan (University of Chemistry and Technology Prague. Department of Inorganic Chemistry)
Sofer, Zdeněk (University of Chemistry and Technology Prague. Department of Inorganic Chemistry)
Ballesteros, Belén (Institut Català de Nanociència i Nanotecnologia)
Thanh, Nguyen Thi Kim (University College London. Department of Physics and Astronomy)
Lappas, Alexandros (Foundation for Research and Technology-Hellas)

Fecha:	2021
Resumen:	Copper selenide-sulfide nanostructures were synthesized using metal-organic chemical routes in the presence of Cu- and Se-precursors as well as S-containing compounds. Our goal was first to examine if the initial Cu/Se 1:1 molar proportion in the starting reagents would always lead to equiatomic composition in the final product, depending on other synthesis parameters which affect the reagents reactivity. Such reaction conditions were the types of precursors, surfactants and other reagents, as well as the synthesis temperature. The use of 'hot-injection' processes was avoided, focusing on 'non-injection' ones; that is, only heat-up protocols were employed, which have the advantage of simple operation and scalability. All reagents were mixed at room temperature followed by further heating to a selected high temperature. It was found that for samples with particles of bigger size and anisotropic shape the CuSe composition was favored, whereas particles with smaller size and spherical shape possessed a CuSe phase, especially when no sulfur was present. Apart from elemental Se, AlSe was used as an efficient selenium source for the first time for the acquisition of copper selenide nanostructures. The use of dodecanethiol in the presence of trioctylphosphine and elemental Se promoted the incorporation of sulfur in the materials crystal lattice, leading to Cu-Se-S compositions. A variety of techniques were used to characterize the formed nanomaterials such as XRD, TEM, HRTEM, STEM-EDX, AFM and UV-Vis-NIR. Promising results, especially for thin anisotropic nanoplates for use as electrocatalysts in nitrogen reduction reaction (NRR), were obtained.
Ayudas:	European Commission 654360 Ministerio de Ciencia e Innovación SEV-2017-0706 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-327
Derechos:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió publicada
Materia:	Bottom-up synthesis ; Electrochemistry ; Wet chemistry ; Morphology ; Copper chalcogenides ; Nitrogen reduction reaction ; Metal-organic chemistry
Publicado en:	Nanomaterials, Vol. 11, Issue 12 (December 2021) , art. 3369, ISSN 2079-4991

DOI: 10.3390/nano11123369
PMID: 34947718

21 p, 4.9 MB

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