Low-temperature dry reforming of methane tuned by chemical speciations of active sites on the SiO2 and γ-Al2O3 supported Ni and Ni-Ce catalysts

Yimin Zhang; Ruiming Zeng; Yun Zu; Linhua Zhu; Yi Mei; Yongming Luo; Dedong He

Your Location：

Home >

Browse articles >

Low-temperature dry reforming of methane tuned by chemical speciations of active sites on the SiO₂ and γ-Al₂O₃ supported Ni and Ni-Ce catalysts

Updated：2026-01-06

- Low-temperature dry reforming of methane tuned by chemical speciations of active sites on the SiO₂ and γ-Al₂O₃ supported Ni and Ni-Ce catalysts
- Chinese Journal of Chemical Engineering Vol. 48, Issue 8, Pages: 76-90(2022)
- Affiliations：
  
  1. Faculty of Chemical Engineering, Kunming University of Science and Technology,Kunming,China,650500
  2. Faculty of Environmental Science and Engineering, Kunming University of Science and Technology,Kunming,China,650500
  3. National Engineering Laboratory for Flue Gas Pollutants Control Technology and Equipment, Tsinghua University,Beijing,China,100084
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：2022
- Accepted：
Scan QR Code
and
DOI：

and DOI：

摘要

Abstract

The cognition of active sites in the Ni-based catalysts plays a vital role and remains a huge challenge in improving catalytic performance of low temperature CO

dry reforming of methane (LTDRM). In this work

typical catalysts of SiO

and

-Al

supported Ni and Ni-Ce were designed and prepared. Importantly

the difference in the chemical speciations of active sites on the Ni-based catalysts is revealed by advanced characterizations and further estimates respective catalytic performance for LTDRM. Results show that larger[Ni

]

particles mixed with [Ni-O-Si

]

) species on the Ni/SiO

(R) make CH

excessive decomposition

leading to poor activity and stability. Once the Ce species is doped

however

superior activity (59.0% CH

and 59.8% CO

conversions)

stability and high H

/CO ratio (0.96) at 600?℃ can be achieved on the Ni-Ce/SiO

(R)

in comparison with other catalysts and even reported studies. The improved performance can be ascribed to the formation of integral ([Ni

]

-[Ce

III

-□-Ce

III

]

) species on the Ni-Ce/SiO

(R) catalyst

containing highly dispersed [Ni

]

particles and rich oxygen vacancies

which can synergistically establish a new stable ba

lance between gasification of carbon species and CO

dissociation. With respect to Ni-Ce/

-Al

(R)

the Ni and Ce precursors are easily captured by extra-framework Al

-OH groups and further form stable isolated ([Ni

]

-[Ni-O-Al

]

) and [Ce

III

-O-Al

]

species. In such a case

both of them preferentially accelerate CO

adsorption and dissociation

causing more carbon deposition due to the disproportionation of superfluous CO product. This deep distinguishment of chemical speciations of active sites can guide us to further develop new efficient Ni-based catalysts for LTDRM in the future.

关键词

Keywords

references

Views

Downloads

CSCD

Alert me when the article has been cited

Submit

Tools

Publicity Resources

A bifunctional MnOx@PTFE catalytic membrane for efficient low temperature NOx-SCR and dust removal

Nano-confinement construction of FeCo@NCNTs nanocomposite for pH-universal oxygen reduction catalysis and high-power Zn-air battery

Dual-site engineering of Ga-modified HZSM-5 towards efficient propane aromatization

Unraveling the methane decomposition mechanism on Fe-Ni-Ca-O composite catalysts: A combined density functional theory and microdynamic study

Size-dependent decomposition behavior of limestone in fluidized bed calcination: Insights into fluidization, kinetics, and mechanisms

Related Author

Shasha Feng

Mengdi Zhou

Feng Han

Zhaoxiang Zhong

Weihong Xing

Related Institution

State Key Laboratory of Materials-Oriented Chemical Engineering, National Engineering Research Center for Special Separation Membrane, Nanjing Tech University

Nanjing Industrial Technology Research Institute of Membrane Material Co. Ltd.

⁰