Manipulating ceria-titania binary oxide features and their impact as nickel catalyst supports for low temperature steam reforming of methane

Kho, Ee Teng; Lovell, Emma C.; Wong, Roong Jien; Scott, Jason; Amal, Rose

doi:10.1016/j.apcata.2016.11.019

Cited by 22 publications

(9 citation statements)

References 31 publications

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“…The Si2p spectra contains peaks at 103.5 eV and 102.7 eV, which are attributed to Si 4+ 2p 1/2 and Si 4+ 2p 3/2 , respectively. These peak positions are situated at a lower binding energy than what has been reported for SiO 2 prepared via flame spray pyrolysis [35]. In this case, the shift of Si2p peak binding energy can be attributed to strong interactions between Si and Ti which are formed during synthesis.…”

Section: Resultsmentioning

confidence: 58%

Plasma Treating Mixed Metal Oxides to Improve Oxidative Performance via Defect Generation

et al. 2019

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The generation of structural defects in metal oxide catalysts offers a potential pathway to improve performance. Herein, we investigated the effect of thermal hydrogenation and low-temperature plasma treatments on mixed SiO2/TiO2 materials. Hydrogenation at 500 °C resulted in the reduction of the material to produce Ti3+ in the bulk TiO2. In contrast, low temperature plasma treatment for 10 or 20 min generated surface Ti3+ species via the removal of oxygen on both the neat and hydrogenated material. Assessing the photocatalytic activity of the materials demonstrated a 40–130% increase in the rate of formic acid oxidation after plasma treatment. A strong relationship between the Ti3+ content and catalyst activity was established, although a change in the Si–Ti interaction after plasma treating of the neat SiO2/TiO2 material was found to limit performance, and suggests that performance is not determined solely by the presence of Ti3+.

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Section: Resultsmentioning

confidence: 58%

Plasma Treating Mixed Metal Oxides to Improve Oxidative Performance via Defect Generation

et al. 2019

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“…observed the presence of orthorhombic CeO 2 when certain ratios of Ti : Ce were used in FSP. Orthorhombic CeO 2 is typically derived from high‐pressure phase transformation of cubic fluorite CeO 2 whereby the presence of Ti during FSP synthesis was able to produce the same phase . Additionally, Lovell et al.…”

Section: Introductionmentioning

confidence: 98%

Effect of Metal‐Support Interactions in Mixed Co/Al Catalysts for Dry Reforming of Methane

et al. 2019

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Composite Co/Al oxide materials were prepared via flame spray pyrolysis and examined as catalysts for the dry reforming of methane. The interaction between the metal (Co) and the support (Al-oxide) was regulated by varying the Co : Al ratio and its influence on catalyst performance studied. The synthesis of materials with a Co content of 30 mol % (Co 3 Al 7 ) promoted the formation of readily reduced and highly-dispersed Co particles. This, in combination with a high relative surface basicity, contributed to Co 3 Al 7 delivering a high and stable activity towards the dry reforming reaction. The formation of bulk Co 3 O 4 particles, which exhibit weak interactions with the support material, in samples with a Co content of 50 (Co 5 Al 5 ) and 70 mol % (Co 7 Al 3 ) caused rapid catalyst deactivation via coking. The findings demonstrate the importance of metalsupport interactions between the Co catalyst and Al-oxide support for the activity and selectivity in the dry reforming of methane. Highly dispersed Co deposits and high support basicity, induced by an ideal FSP Co : Al synthesis ratio, are key to delivering an active and stable catalyst for the dry reforming of methane.[a] Dr.

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“…The better results were obtained by catalysts prepared through sol-gel method, especially these containing more cerium than titanium. It was noted, that the samples prepared by sol-gel method were more stable during the stability tests 55 .…”

Section: Steam Reforming Of Methanementioning

confidence: 99%

Dry and steam reforming of methane. Comparison and analysis of recently investigated catalytic materials. A short review.

Summa

Samojeden

Motak

2019

Polish Journal of Chemical Technology

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In order to produce valuable syngas, industrial processes of dry reforming of methane and steam reforming of methane must be further developed. This paper is focused on reviewing recently examined catalysts, supporting the mentioned technologies. In both processes the most popular active material choice is usually nickel, due to its good availability. On the other hand, noble metals, such as ruthenium, rhodium or platinum, provide better performance, however the solution is not cost-effective. Materials used as a support influence the catalytic activity. Oxides with basic properties, such as MgO, Al2O3, CeO2, are frequently used as carriers. One of the most promising materials for reforming of methane technologies are hydrotalcites, due to adjustable composition, acid-base properties and possibility of incorporation of various metals and complexes.

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Manipulating ceria-titania binary oxide features and their impact as nickel catalyst supports for low temperature steam reforming of methane

Cited by 22 publications

References 31 publications

Plasma Treating Mixed Metal Oxides to Improve Oxidative Performance via Defect Generation

Plasma Treating Mixed Metal Oxides to Improve Oxidative Performance via Defect Generation

Effect of Metal‐Support Interactions in Mixed Co/Al Catalysts for Dry Reforming of Methane

Dry and steam reforming of methane. Comparison and analysis of recently investigated catalytic materials. A short review.

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