RT Journal Article
T1 Nickel-Doped Sodium Cobaltite 2D Nanomaterials: Synthesis and Electrocatalytic Properties
A1 Ruiz González, María Luisa
A1 Gonell, Francisco
A1 Laberty-Robert, Christel
A1 Parras Vázquez, Marina Marta
A1 Sanchez, Clément
A1 Portehault, David
A1 González Calbet, José María
A1 Azor Lafarga, Alberto Eduardo
AB ABSTRACT: In this work we report a synthetic pathway to two-dimensional nanostructures of high oxidation state lamellar cobalt oxides with thicknesses of only few atom layers, through the combined use of precipitation in basic water at room temperature and gentle solid state topotactic transformation at 120 °C. The 2D nanomaterials are characterized by X-ray diffraction, nitrogen porosimetry, scanning electron microscopy, transmission electron microscopy and especially scanning transmission electron microscopy coupled to energy dispersive X-ray analysis and electron energy loss spectroscopy to assess the composition of the nanosheets and the oxidation state of the transition metal species. We show that the nanosheets preserve high oxidation states Co3+ and Co4+ of high interest for electrocatalysis of the oxygen evolution reaction (OER). By combining high Co oxidation state, surface-to-volume ratio and optimized nickel substitution, the 2D nanomaterials produced in a simple way exhibit high OER electrocatalytic activity and stability in alkaline aqueous electrolyte comparable to standard materials obtained in harsh thermal conditions.
PB American Chemical Society
SN 0897-4756
YR 2018
FD 2018
LK https://hdl.handle.net/20.500.14352/92326
UL https://hdl.handle.net/20.500.14352/92326
LA eng
NO Azor, A.; Ruiz-Gonzalez, M.; Gonell, F.; Laberty-Robert, C.; Parras, M.; Sanchez, C.; Portehault, D.; González-Calbet, J. M. Nickel-Doped Sodium Cobaltite 2D Nanomaterials: Synthesis and Electrocatalytic Properties. Chem. Mater. 2018, 30, 4986-4994 DOI:10.1021/acs.chemmater.8b01146.
NO Ministerio de Ciencia e Innovación (España)
NO Ministerio de Economía y Competitividad (España)
DS Docta Complutense
RD 28 sept 2024