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Open AccessArticle
RuNi/TiZr-MMO Catalysts Derived from Zr-Modified NiTi-LDH for CO-Selective Methanation
by
Zhihui Li
Zhihui Li †,
Jiteng Ma
Jiteng Ma † and
Xinfa Dong
Xinfa Dong *
Guangdong Provincial Key Laboratory of Green Chemical Product Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
*
Author to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Molecules 2024, 29(14), 3309; https://doi.org/10.3390/molecules29143309 (registering DOI)
Submission received: 27 May 2024
/
Revised: 29 June 2024
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Accepted: 11 July 2024
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Published: 13 July 2024
Abstract
CO-selective methanation (CO-SMET) is an efficient hydrogen-rich (H2-rich) gas purification technology for proton exchange membrane fuel cells. It is vital to develop suitable catalysts with good low-temperature activity for CO-SMET reactions. In this study, RuNi/TiZrx-mixed metal oxide (RuNi/TiZrx-MMO) catalysts with different molar ratios of Zr/Ti, derived from a Zr-promoted NiTi-layered double hydroxide (NiTi-LDH) precursor were successfully prepared using the co-precipitation and wet impregnation methods. The RuNi/TiZr0.2-MMO catalyst possesses higher catalytic performance in a lower temperature window of 180–280 °C, which can reduce the CO concentration to be below 10 ppm. The characterization results obtained from XRD, BET, SEM, TEM, XPS, TPR, and TPD suggest that the addition of ZrO2 increases the surface area of the catalyst, improves the dispersion of metallic nanoparticles, increases the reducibility of Ni species on the RuNi/TiZr0.2-MMO catalyst’s surface, and enhances the adsorption and activation ability of CO, resulting in remarkable catalytic performance at lower reaction temperatures. Moreover, the RuNi/TiZr0.2-MMO catalyst demonstrated long-term catalytic stability and carbon resistance.
Share and Cite
MDPI and ACS Style
Li, Z.; Ma, J.; Dong, X.
RuNi/TiZr-MMO Catalysts Derived from Zr-Modified NiTi-LDH for CO-Selective Methanation. Molecules 2024, 29, 3309.
https://doi.org/10.3390/molecules29143309
AMA Style
Li Z, Ma J, Dong X.
RuNi/TiZr-MMO Catalysts Derived from Zr-Modified NiTi-LDH for CO-Selective Methanation. Molecules. 2024; 29(14):3309.
https://doi.org/10.3390/molecules29143309
Chicago/Turabian Style
Li, Zhihui, Jiteng Ma, and Xinfa Dong.
2024. "RuNi/TiZr-MMO Catalysts Derived from Zr-Modified NiTi-LDH for CO-Selective Methanation" Molecules 29, no. 14: 3309.
https://doi.org/10.3390/molecules29143309
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