(n, M) Distribution of Single-Walled Carbon Nanotubes Grown from a Non-Magnetic Palladium Catalyst

Overview

Journal Molecules

Publisher MDPI

Specialty Biology

Date 2023 Mar 29

PMID 36985423

Authors

Xiaofan Qin

Dong Li

Lihu Feng

Ying Wang

Lili Zhang

Liu Qian

Wenyue Zhao

Ningning Xu

Xinyan Chi

Shiying Wang

Maoshuai He

Affiliations

Soon will be listed here.

Abstract

Non-magnetic metal nanoparticles have been previously applied for the growth of single-walled carbon nanotubes (SWNTs). However, the activation mechanisms of non-magnetic metal catalysts and chirality distribution of synthesized SWNTs remain unclear. In this work, the activation mechanisms of non-magnetic metal palladium (Pd) particles supported by the magnesia carrier and thermodynamic stabilities of nucleated SWNTs with different (n, m) are evaluated by theoretical simulations. The electronic metal-support interaction between Pd and magnesia upshifts the -band center of Pd, which promotes the chemisorption and dissociation of carbon precursor molecules on the Pd surface, making the activation of magnesia-supported non-magnetic Pd catalysts for SWNT growth possible. To verify the theoretical results, a porous magnesia supported Pd catalyst is developed for the bulk synthesis of SWNTs by chemical vapor deposition. The chirality distribution of Pd-grown SWNTs is understood by operating both Pd-SWNT interfacial formation energy and SWNT growth kinetics. This work not only helps to gain new insights into the activation of catalysts for growing SWNTs, but also extends the use of non-magnetic metal catalysts for bulk synthesis of SWNTs.

Citing Articles

An efficient approach toward production of near-zigzag single-chirality carbon nanotubes.

Li Y, Li L, Jiang H, Qian L, He M, Zhou D Sci Adv. 2024; 10(14):eadn6519.

PMID: 38569036 PMC: 10990264. DOI: 10.1126/sciadv.adn6519.

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