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Carbon Nanotubes Deposited on Mordenite Zeolite/NiAl-Layered Double Hydroxide Composites as Electrocatalysts for 2,5-Furandicarboxylic Acid Production from 5-Hydroxymethylfurfural

Cite this: ACS Appl. Nano Mater. 2023, 6, 10, 8784–8794
Publication Date (Web):May 12, 2023
https://doi.org/10.1021/acsanm.3c01168
Copyright © 2023 American Chemical Society

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    Abstract

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    The nanostructured free-standing NiAl-MOR-CNTs electrocatalysts containing carbon nanotubes (CNTs) deposited on mordenite (MOR) zeolite/NiAl-layered double hydroxide (NiAl-LDH) have been successfully fabricated. Initially, the core-shell NiAl-LDH-MOR with hierarchical structures was observed via an aqueous miscible organic solvent treatment process to deposit nanosized NiAl-LDH homogeneously on a zeolite surface. The synthesized NiAl-LDH-MOR composites were calcined to produce highly dispersed metal oxides catalyzing the CNTs formation via chemical vapor deposition using bioethanol as a feedstock, eventually producing the NiAl-MOR-CNTs composites. To illustrate the beneficial aspect of the prepared composite, they were mixed with Nafion as a binder and pressed into circular pellets used as free-standing electrodes for electrochemical oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA), an important renewable monomer of bioplastic. The prepared free-standing electrodes exhibited an excellent catalytic performance of 100% conversion of HMF with a high selectivity of FDCA up to 92% under ambient conditions. Moreover, the synthesized electrocatalysts can be recycled even after several consecutive cycles without any loss of catalytic activity, confirming a high stability of the synthesized electrodes. This work illustrates the design of electrocatalysts by using conductive CNTs grown on highly dispersed metal active sites on zeolite/LDH composites without using commercial conductive supports such as nickel foam or carbon fiber paper.

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    The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acsanm.3c01168.

    • Schematic illustration of parallel reactors, photographs of the prepared free-standing electrode and electrochemical test setup, FTIR, Raman, TGA, CV, SEM and TEM images of the synthesized materials, properties of the CNTs synthesized via CVD, textural properties of the synthesized materials obtained from N2 physisorption measurements, and metal particle size of the synthesized materials (PDF)

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    Cited By

    This article is cited by 1 publications.

    1. Peeranat Chaipornchalerm, Watinee Nunthakitgoson, Poobodin Mano, Pinit Kidkhunthod, Alejandro Montoya, Supawadee Namuangruk, Chularat Wattanakit. Rational Design of Fe Single Sites Supported on Hierarchical Zeolites via Atomic Layer Deposition for Few-Walled Carbon Nanotube Production. ACS Applied Materials & Interfaces 2024, Article ASAP.