Influence of preparation method on performance of Ni-CeO2 catalysts for reverse water-gas shift reaction

Preparation of highly active and stable NiO–CeO2 nanocatalysts for CO selective methanation

“…The g peak appeared at higher temperatures is due to the reduction of NiO, which is strongly interacted with CeO 2 support [34]. The broad b and g peaks can be related to both the reduction of highly dispersed NiO and the step-by-step reduction of the aggregated NiO on the surface of cerium oxide [32,33]. i n t e r n a t i o n a l j o u r n a l o f h y d r o g e n e n e r g y 4 0 ( 2 0 1 5 ) 8 5 3 9 e8 5 4 7…”

“…The Ce x Ni y O solid solution can be formed by entrance of Ni 2þ cations into CeO 2 lattice and replace some Ce 4þ ions. This lattice deformation and charge imbalance at the ceria structure cause to the formation of oxygen vacancies [32,33]. Therefore, the adsorbed oxygen species in oxygen vacancies of ceria could be easily reduced by hydrogen at low temperatures.…”

Highly efficient Ni/CeO2-Al2O3 catalysts for CO2 upgrading via reverse water-gas shift: Effect of selected transition metal promoters

“…This effect can be attributed to Zn sublimation during the reaction [11]. Recently, Ni has gained the attention of several research teams working in the RWGS due to its relatively high activity and its economic viability compared to the noble metals discussed previously [12]. Additionally, the use of transition metal oxides, such as Al 2 O 3 , MgO, ZrO 2 and TiO 2 , have been investigated as supports for Ni catalysts [11,12,16,17].…”

“…Recently, Ni has gained the attention of several research teams working in the RWGS due to its relatively high activity and its economic viability compared to the noble metals discussed previously [12]. Additionally, the use of transition metal oxides, such as Al 2 O 3 , MgO, ZrO 2 and TiO 2 , have been investigated as supports for Ni catalysts [11,12,16,17]. Among these metal oxide carriers, researchers have proved that alumina can help the Ni particles dispersion via a large surface area [18].…”

Application of boron-modified nickel catalysts on the steam reforming of ethanol

“…Due to the feature, allowing fast and easy oxygen transfer [38], it can easily carry out the water gas shift (WGS) and preferential CO oxidation (PROX) reactions to remove CO [39]. Since the sintering of nickel is another problem during reaction at high temperature [40], the ceria-supported nickel catalysts, prepared through different methods, can elevate the dispersion of the NiO on the support, especially for co-precipitation [41]. In order to understand the role of doping boron on a Ni-based catalyst for the performance of the SRE reaction, the comparison between preparation methods with/without B-modified catalysts is studied in this paper.…”