Ni-La confined in TiO2 nanotubes with efficient activity and stability for dry methane reforming

Zizhen Niu, Peiwei Han, Yilin Du, Ziteng Han, Lin Lang, Xinjun Li and Xiuli Yin

Renewable Energy, 2025, vol. 248, issue C

Abstract: Dry reforming of methane (DRM) has emerged as a dual-functional strategy for carbon neutrality and sustainable hydrogen production. Herein, we design a catalyst based on titanium dioxide nanotubes (TiO2NTs) confined by nickel (Ni) and the rare earth element lanthanum (La) for dry methane reforming. The confined catalyst (La/Ni@TiO2NTs) exhibits superior catalytic performance, achieving 92.5 % CH4 conversion and 86.4 % CO2 conversion at 650 °C, with a gas hourly space velocity (GHSV) of 4500 mL g−1 h−1 under atmospheric pressure. Moreover, remarkable stability was demonstrated during 100 h of continuous operation. Catalysts were characterized by CO2-TPD, TPR, XPS, XRD, and in situ DRIFTS to correlate catalyst performance with structural properties. The synergistic effect of Ni and La enhances the dissociation of CH4 and CO2, while the electron-deficient environment of TiO2NTs further strengthens this enhancement, promoting efficient and stable reaction. This study provides a theoretical foundation for the design of efficient, carbon-resistant catalysts for reforming reactions in biomass utilization.

Keywords: La-Ni; TiO2 nanotubes; Confinement effect; Dry methane reforming (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:248:y:2025:i:c:s0960148125008122

DOI: 10.1016/j.renene.2025.123150

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