Hierarchical Co₃O₄-NiO hollow dodecahedron-supported Pt for room-temperature catalytic formaldehyde decomposition

Jiawei YE, Bei CHENG, Jiaguo YU, Wing Kei HO, S. WAGEH, Ahmed A. AL-GHAMDI

Research output: Contribution to journalArticlespeer-review

Abstract

Room-temperature catalytic decomposition is considered a predominant approach for the continuous and efficient elimination of indoor formaldehyde (HCHO). Herein, Co₃O₄-NiO hollow dodecahedra were prepared by using ZIF-67 as a precursor and decorated with 0.3 wt% platinum nanoparticles (Pt NPs). The hierarchical porous Pt/Co₃O₄-NiO catalyst exhibited an excellent room-temperature HCHO decomposition performance, and 93% conversion was achieved within 60 min. Numerous active oxygens at the interface between Co₃O₄ and NiO and the oxygen vacancies generated during Pt deposition were favorable for the adsorption and conversion of HCHO to Dioxymethylene (DOM). Moreover, the electron transfer from NiO to Pt rendered Pt NPs more effective in adsorbing and activating O₂ molecules, thereby promoting the further oxidation of DOM to formate and CO₂. Importantly, the hierarchical structure of the Co₃O₄-NiO support with a large surface area participated in the uniform distribution and easy accessibility of Pt active sites. In addition, the hollow and porous structure enabled Pt/Co₃O₄-NiO catalyst to possess ultra-low gas resistance, which is important for gas–solid HCHO oxidation. This work may provide clues for the fabrication of MOF-derived catalysts for HCHO decomposition with high efficiency. Copyright © 2021 Elsevier B.V. All rights reserved.
Original languageEnglish
Article number132715
JournalChemical Engineering Journal
Volume430
Issue numberPt. 1
Early online date06 Oct 2021
DOIs
Publication statusE-pub ahead of print - 06 Oct 2021

Citation

Ye, J., Cheng, B., Yu, J., Ho, W., Wageh, S., & Al-Ghamdi, A. A. (2021). Hierarchical Co₃O₄-NiO hollow dodecahedron-supported Pt for room-temperature catalytic formaldehyde decomposition. Chemical Engineering Journal, 430(Pt. 1). Retrieved from https://doi.org/10.1016/j.cej.2021.132715

Keywords

  • Formaldehyde oxidation
  • Co₃O₄
  • NiO
  • Platinum
  • Active oxygen species
  • MOFs

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