Reversal of methanation-oriented to RWGS-oriented Ni/SiO<sub>2</sub> catalysts by the exsolution of Ni<sup>2+</sup> confined in silicalite-1

Chen, Chia-Hung; Chen, Hong-Kai; Huang, Wei-Hsiang; Chen, Chi-Liang; Choojun, Kittisak; Sooknoi, Tawan; Tian, Hong-Kang; Lin, Yu-Chuan

doi:10.1039/d3gc02399k

Cited by 4 publications

(2 citation statements)

References 77 publications

(99 reference statements)

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“…The O 1s spectrum (Figure b) can be divided into two peaks, the peaks near 531.5 eV correspond to the surface-adsorbed oxygen species such as surface carbonates or hydroxyl groups (O α ), , while the peaks near 532.5 eV relate to oxygen in Si–O–Si bonds (O β ) . The ratio value of O α /(O α + O β ) (Table ) in Ni/1.0Na-HNTs (56.2%) is larger than any other catalysts, meaning that there are more oxygen vacancies on the catalyst surface and thus more surface-adsorbed oxygen species generated .…”

Section: Resultsmentioning

confidence: 99%

Enhanced CO₂ Methanation over Ni/Na-HNTs: Effect of Pretreatment with NaOH

Yang,

Jin,

et al. 2024

Ind. Eng. Chem. Res.

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Hydrogenation of CO 2 into high value-added methane has received increasing attention as one of the most effective ways to reduce CO 2 emissions in the atmosphere and alleviate the energy crisis. However, improving the catalytic performance of Ni-based catalysts at low temperatures is still the focus of research at the present. Herein, a series of Ni-based catalysts supported on halloysite nanotubes (HNTs) pretreated with NaOH solution were prepared through a simple impregnation method. The optimized catalyst Ni/1.0Na-HNTs demonstrate exceptional catalytic activity, achieving CO 2 conversion of 82.3% and CH 4 selectivity of 97.3% at a low temperature of 300 °C. The characterization results show that NaOH pretreatment can increase the defective sites on the support surface and successfully introduce the alkali metal (sodium), resulting in highly dispersed metal nanoparticles and increased capacity for H 2 dissociation and CO 2 activation, which is critical in CO 2 methanation. Additionally, in situ DRIFTS analysis reveals that the reaction path for CO 2 methanation in this work follows both the formate route and the CO route.

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Section: Resultsmentioning

confidence: 99%

Enhanced CO₂ Methanation over Ni/Na-HNTs: Effect of Pretreatment with NaOH

Yang,

Jin,

et al. 2024

Ind. Eng. Chem. Res.

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“…In addition, many other nickel catalysts have been reported [48,49,[85][86][87][88][89][90][91][92][93][94][95][96][97][98], including bimetallic [93][94][95][96][97][98] or polymetallic catalysts composed of nickel and other metals.…”

Section: Ni-based Catalystsmentioning

confidence: 99%

Recent Advances in the Reverse Water–Gas Conversion Reaction

Zhou,

Zhang,

et al. 2023

Molecules

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The increase in carbon dioxide emissions has significantly impacted human society and the global environment. As carbon dioxide is the most abundant and cheap C1 resource, the conversion and utilization of carbon dioxide have received extensive attention from researchers. Among the many carbon dioxide conversion and utilization methods, the reverse water–gas conversion (RWGS) reaction is considered one of the most effective. This review discusses the research progress made in RWGS with various heterogeneous metal catalyst types, covering topics such as catalyst performance, thermodynamic analysis, kinetics and reaction mechanisms, and catalyst design and preparation, and suggests future research on RWGS heterogeneous catalysts.

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A review on catalyst advances for photothermal dry reforming of methane reaction

Tian,

Wang

2025

Separation and Purification Technology

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Reversal of methanation-oriented to RWGS-oriented Ni/SiO₂ catalysts by the exsolution of Ni²⁺ confined in silicalite-1

Abstract: Ni/SiO2-based catalysts derived from the reduction of silicalite-1-encapsulated, ligand-protected Ni2+ was found to be effective in the selective hydrogenation of CO2 to CO via the reverse water-gas shift (RWGS).

Cited by 4 publications

References 77 publications

Enhanced CO₂ Methanation over Ni/Na-HNTs: Effect of Pretreatment with NaOH

Enhanced CO₂ Methanation over Ni/Na-HNTs: Effect of Pretreatment with NaOH

Recent Advances in the Reverse Water–Gas Conversion Reaction

A review on catalyst advances for photothermal dry reforming of methane reaction

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Reversal of methanation-oriented to RWGS-oriented Ni/SiO2 catalysts by the exsolution of Ni2+ confined in silicalite-1

Abstract: Ni/SiO2-based catalysts derived from the reduction of silicalite-1-encapsulated, ligand-protected Ni2+ was found to be effective in the selective hydrogenation of CO2 to CO via the reverse water-gas shift (RWGS).

Cited by 4 publications

References 77 publications

Enhanced CO2 Methanation over Ni/Na-HNTs: Effect of Pretreatment with NaOH

Enhanced CO2 Methanation over Ni/Na-HNTs: Effect of Pretreatment with NaOH

Recent Advances in the Reverse Water–Gas Conversion Reaction

A review on catalyst advances for photothermal dry reforming of methane reaction

Contact Info

Product

Resources

About

Reversal of methanation-oriented to RWGS-oriented Ni/SiO₂ catalysts by the exsolution of Ni²⁺ confined in silicalite-1

Enhanced CO₂ Methanation over Ni/Na-HNTs: Effect of Pretreatment with NaOH

Enhanced CO₂ Methanation over Ni/Na-HNTs: Effect of Pretreatment with NaOH