RT journal article
T1 Low-oxidation-state Ru sites stabilized in carbon-doped RuO2 with low-temperature CO2 activation to yield methane
A1 Tébar Soler, Carmen
A1 Martin Diaconescu, Vlad
A1 Simonelli, Laura
A1 Missyul, Alexander
A1 Pérez-Dieste, Virginia
A1 Villar-García, Ignacio
A1 Brubach, Jean-Blaise
A1 Roy, Pascale
A1 López Haro, Miguel
A1 Calvino Gámez, José Juan
A1 Concepción, Patricia
A1 Corma, Avelino
A2 Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica
AB The generation of methane fuel using surplus renewable energy with CO as the carbon source enables both the decarbonization and substitution of fossil fuel feedstocks. However, high temperatures are usually required for the efficient activation of CO. Here we present a solid catalyst synthesized using a mild, green hydrothermal synthesis that involves interstitial carbon doped into ruthenium oxide, which enables the stabilization of Ru cations in a low oxidation state and a ruthenium oxycarbonate phase to form. The catalyst shows an activity and selectivity for the conversion of CO into methane at lower temperatures than those of conventional catalysts, with an excellent long-term stability. Furthermore, this catalyst is able to operate under intermittent power supply conditions, which couples very well with electricity production systems based on renewable energies. The structure of the catalyst and the nature of the ruthenium species were acutely characterized by combining advanced imaging and spectroscopic tools at the macro and atomic scales, which highlighted the low-oxidation-state Ru sites (Ru, 0 < n < 4) as responsible for the high catalytic activity. This catalyst suggests alternative perspectives for materials design using interstitial dopants.
PB Nature Research
SN 1476-4660
YR 2023
FD 2023
LK http://hdl.handle.net/10498/30776
UL http://hdl.handle.net/10498/30776
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 13-nov-2026