RT journal article
T1 Thermocatalytic CO2 Conversion over a Nickel-Loaded Ceria Nanostructured Catalyst: A NAP-XPS Study
A1 Barroso Bogeat, Adrián
A1 Blanco Montilla, Ginesa
A1 Pérez Sagasti, Juan José
A1 Escudero, Carlos
A1 Pellegrin, Eric
A1 Herrera, Facundo C.
A1 Pintado Caña, José María
A2 Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica
K1 ceria nanocubes
K1 nickel
K1 CO2 hydrogenation
K1 rare earth oxides
K1 Near Ambient Pressure X-ray Photoelectron Spectroscopy (NAP-XPS)
AB Despite the increasing economic incentives and environmental advantages associated to their substitution, carbon-rich fossil fuels are expected to remain as the dominant worldwide source of energy through at least the next two decades and perhaps later. Therefore, both the control and reduction of CO2 emissions have become environmental issues of major concern and big challenges for the international scientific community. Among the proposed strategies to achieve these goals, conversion of CO2 by its reduction into high added value products, such as methane or syngas, has been widely agreed to be the most attractive from the environmental and economic points of view. In the present work, thermocatalytic reduction of CO2 with H-2 was studied over a nanostructured ceria-supported nickel catalyst. Ceria nanocubes were employed as support, while the nickel phase was supported by means a surfactant-free controlled chemical precipitation method. The resulting nanocatalyst was characterized in terms of its physicochemical properties, with special attention paid to both surface basicity and reducibility. The nanocatalyst was studied during CO2 reduction by means of Near Ambient Pressure X-ray Photoelectron Spectroscopy (NAP-XPS). Two different catalytic behaviors were observed depending on the reaction temperature. At low temperature, with both Ce and Ni in an oxidized state, CH4 formation was observed, whereas at high temperature above 500 degrees C, the reverse water gas shift reaction became dominant, with CO and H2O being the main products. NAP-XPS was revealed as a powerful tool to study the behavior of this nanostructured catalyst under reaction conditions.
PB MDPI
SN 1996-1944
YR 2021
FD 2021-02
LK http://hdl.handle.net/10498/24762
UL http://hdl.handle.net/10498/24762
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 21-sep-2026