Abstract:The rapid economic and societal development have led to unprecedented energy demand and consumption resulting in the harmful emission of pollutants. Hence, the conversion of greenhouse gases into valuable chemicals and fuels has become an urgent challenge for the scientific community. In recent decades, perovskite-type mixed oxide-based catalysts have attracted significant attention as efficient CO2 conversion catalysts due to the characteristics of both reversible oxygen storage capacity and stable structure … Show more
“…reversibly shuttled between PTOs and cationic oxides, which favors the perovskite support nature and resultantly improved the catalytic activity. 53 The synthesis approach and the cationic substitutions helped to tune the physiochemical properties and promote the catalytic activity. In fact, the catalyst fabrication methods envisaged to attain better characterization results such as hydrogen consumption, CO 2 uptake capacity, high surface area, and uniform dispersion.…”
“…reversibly shuttled between PTOs and cationic oxides, which favors the perovskite support nature and resultantly improved the catalytic activity. 53 The synthesis approach and the cationic substitutions helped to tune the physiochemical properties and promote the catalytic activity. In fact, the catalyst fabrication methods envisaged to attain better characterization results such as hydrogen consumption, CO 2 uptake capacity, high surface area, and uniform dispersion.…”
“…This might seem surprising since both catalysts have similar Ni loading and surface area, and aer activation in H 2 they also show largely similar XRD patterns. One explanation of the superior perovskite-derived Ni-La 2 O 3 catalyst performance frequently suggested in the literature 26,31,33 is the creation of highly dispersed nanoparticles socketing into the oxide matrix. Actually, this morphology was also identied in our exsolved perovskite catalyst by TEM/EDX showing the formation of 6 nm Ni particles that resist sintering under the reaction conditions.…”
Section: Discussionmentioning
confidence: 99%
“…[26][27][28] Exsolution, also known as solid phase crystallization, is a process by which a homogeneous phase is separated into two or more solid phases typically upon annealing at high temperature. [29][30][31] In the case of mixed oxides under reductive conditions, one or more elements will move outwards forming metallic nanoparticles at the oxide surface leading to a morphology resembling that of supported metal catalysts. Exsolution, as opposed to traditional deposition procedures, may offer better control of the metal-support interface.…”
Section: Introductionmentioning
confidence: 99%
“…Among all, the stoichiometric LaNiO 3 perovskite is the archetype of exsolved materials because it is easy to synthesize, has a relatively simple chemistry upon reduction and above all represents an excellent catalyst for CO 2 conversion. 31 It is therefore not surprising that LaNiO 3 is probably the most studied exsolved catalyst in the literature, both in terms of physicochemical and catalytic properties. However, the great majority of these studies focus on CO 2 conversion via dry methane reforming 33 and it is hard to find reports on the performance and chemistry of LaNiO 3 in the CO 2 methanation reaction.…”
CO2 methanation, also known as Sabatier reaction, is of great environmental interest as a sustainable process for energy production and storage. Herein, we report the development of a Ni-La2O3 catalyst...
“…Nevertheless, Ni-based catalysts face prominent problems of sintering and coking in MDR reactions. [32][33][34][35][36][37][38] Therefore, how to develop and design Ni-based catalysts with anti-sintering and anti-coking properties has become one of the hot topics in this field.…”
Methane dry reforming converts two greenhouse gases to produce versatile syngas that serves as a feedstock for chemicals production, while also contributing to closing the anthropogenic carbon cycle. Due to...
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.