Modulating Mxene-Derived Ni-Mom-Mo2-mTiC2Tx Structure for Intensified Low-Temperature Ethanol Reforming

Weizhi Shi, Rongjun Zhang, Hongwei Li, Yu Wu, Sam Toan, Zhao Sun, Zhiqiang Sun

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

The technology of steam reforming of bioethanol has drawn great attention to green hydrogen production. However, catalyst deactivation has always been a significant obstacle to its applications. Here, a series of yNi/Mo2TiC2Tx (yNi/MTC) materials are tailored as robust catalysts for highly efficient long-term ethanol reforming. The results reveal that hydrogen utilization efficiency of up to 95.6% and almost total ethanol conversion can be achieved at 550 °C using a 10Ni/MTC-72h catalyst. Moreover, this catalyst has remarkable stability without obvious deactivation after 100 h of bioethanol reforming, which can be attributed to the formation of a Ni─Mo alloy and the strong interaction of the Ni-Mom-Mo2-mTiC2Tx structure. The FTIR-MS studies demonstrate the superiority of the 10Ni/MTC-72h catalyst for reinforcing low-temperature bioethanol activation, as verified by the faster conversion of acetate species than with Ni/Al2O3. The adsorption energies of ethanol on the surface of Ni (−1.07 eV) and Ni/MTC (−1.46 eV) are compared by density functional theory calculations and show the superiority of the Ni/MTC catalyst for activating ethanol during steam reforming. This study provides new implications for highly stabilized Ni-Mom-Mo2-mTiC2Tx construction, which is expected to substantially promote the development and application of bioethanol-to-hydrogen production technologies.

Original languageEnglish (US)
Article number2301920
JournalAdvanced Energy Materials
Volume13
Issue number40
DOIs
StatePublished - Oct 27 2023
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2023 Wiley-VCH GmbH.

Keywords

  • hydrogen production
  • metal-support interaction
  • Mxenes
  • Ni-Mo-MoTiCT structure
  • steam reforming of ethanol

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