Zr-promoted Ni nanoparticles in mesoporous silica spheres (NiZr/mSiO2) for catalytic decomposition of methane

IF 13.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2025-02-11 DOI:10.1016/j.cej.2025.160328

Mohammadreza Kosari , Samuel B. Portillo , Shibo Xi , Andrew Pedersen , Abhijit Talpade , Fanxing Li

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Abstract

Catalytic decomposition of methane (CDM) is a promising method for producing carbon nanotubes (CNTs) and H₂ at-scale, with net-zero CO₂ emission. Herein, a highly active CDM catalyst is presented comprised of inert mesoporous silica spheres (mSiO₂) as a support loaded with Ni nanoparticles (NPs) and dopants, resulting in high CH₄ conversion and potential inhibition of tip-growth CNTs. Specifically, uniformly dispersed Ni NPs onto mSiO₂ promoted by scant Zr deposition (rendering NiZr/mSiO₂) exhibited decent reducibility and an excellent H₂ production rate (4.52 mol_H2·g_Ni^–1·h⁻¹ at T = 600 °C and GHSV = 24 L·g_cat^–1·h⁻¹). As the best-performing catalyst, 10Ni0.2Zr/mSiO₂ exhibited satisfactory long-term stability with a low deactivation rate and cyclability performance with marginal activity loss over 10 cycles. Besides, the CNTs growth mode from tip-growth to base-growth could be switched by altering the synthetic chemistry of inert mSiO₂ but at the expense of catalytic activity.

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来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.