Artículo
Highly Active and Stable Ni/La-Doped Ceria Material for Catalytic CO2Reduction by Reverse Water-Gas Shift Reaction
Alvarez Galvan, Consuelo; Lustemberg, Pablo German
; Oropeza, Freddy E.; Bachiller-Baeza, Belén; Dapena Ospina, Martin; Herranz, María; Cebollada, Jesús; Collado, Laura; Campos Martin, José M.; de la Peña O'Shea, Victor A.; Alonso, José A.; Ganduglia Pirovano, M. Verónica
Fecha de publicación:
11/2022
Editorial:
American Chemical Society
Revista:
ACS Applied Materials & Interfaces
ISSN:
1944-8244
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The design of an active, effective, and economically viable catalyst for CO2 conversion into value-added products is crucial in the fight against global warming and energy demand. We have developed very efficient catalysts for reverse water-gas shift (rWGS) reaction. Specific conditions of the synthesis by combustion allow the obtention of macroporous materials based on nanosized Ni particles supported on a mixed oxide of high purity and crystallinity. Here, we show that Ni/La-doped CeO2 catalysts─with the "right"Ni and La proportions─have an unprecedented catalytic performance per unit mass of catalyst for the rWGS reaction as the first step toward CO2 valorization. Correlations between physicochemical properties and catalytic activity, obtained using a combination of different techniques such as X-ray and neutron powder diffraction, Raman spectroscopy, in situ near ambient pressure X-ray photoelectron spectroscopy, electron microscopy, and catalytic testing, point out to optimum values for the Ni loading and the La proportion. Density functional theory calculations of elementary steps of the reaction on model Ni/ceria catalysts aid toward the microscopic understanding of the nature of the active sites. This finding offers a fundamental basis for developing economical catalysts that can be effectively used for CO2 reduction with hydrogen. A catalyst based on Ni0.07/(Ce0.9La0.1Ox)0.93 shows a CO production of 58 × 10-5 molCO·gcat-1·s-1 (700 °C, H2/CO2 = 2; selectivity to CO > 99.5), being stable for 100 h under continuous reaction.
Palabras clave:
CEO2
,
DFT CALCULATIONS
,
LA-DOPING
,
NICKEL
,
RWGS
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Licencia
Identificadores
Colecciones
Articulos(IFIR)
Articulos de INST.DE FISICA DE ROSARIO (I)
Articulos de INST.DE FISICA DE ROSARIO (I)
Citación
Alvarez Galvan, Consuelo; Lustemberg, Pablo German; Oropeza, Freddy E.; Bachiller-Baeza, Belén; Dapena Ospina, Martin; et al.; Highly Active and Stable Ni/La-Doped Ceria Material for Catalytic CO2Reduction by Reverse Water-Gas Shift Reaction; American Chemical Society; ACS Applied Materials & Interfaces; 14; 45; 11-2022; 50739-50750
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