Journal
CATALYSIS TODAY
Volume 362, Issue -, Pages 28-34Publisher
ELSEVIER
DOI: 10.1016/j.cattod.2020.05.026
Keywords
Metal-organic framework; UiO-66; Chloride activation; Oxidative catalysis; Desulfurization; Model diesel
Funding
- project REQUIMTE-LAQV [UID/QUI/50006/2019]
- project GlyGold through the FCT/MCTES (Fundacao para a Ciencia e a Tecnologia/Ministerio da Ciencia, Tecnologia e Ensino Superior) [PTDC/CTM-TM/31983/2017]
- FEDER (Fundo Europeu de Desenvolvimento Regional) under the PT2020 Partnership Agreement
- FCT/MCTES
Ask authors/readers for more resources
A novel chloride activation method was developed to enhance the catalytic activity of UiO-66(Zr) and UiO-66(Hf) materials in oxidative desulfurization reactions. The activation treatment significantly improved the catalytic performance of the materials, even after multiple reaction cycles, without structural degradation of the catalyst. This cost-effective method shows promise for efficiently activating catalytic MOF materials and expanding their catalytic applications.
An unprecedented and straightforward strategy towards the activation of metal-organic frameworks UiO-66(Zr) and UiO-66(Hf) in oxidative desulfurization reactions was developed. Post-synthetic treatment of poor-defect pristine UiO-66 materials with chloride-based salts (for example TiCl4) leaded to the preparation of more active and recyclable heterogeneous catalysts for oxidative desulfurization processes. The pristine UiO-66(Hf) showed to be an inactive catalyst; however, after activation treatment 80% of total desulfurization was achieved after 1 h. Also, UiO-66 (Zr) increased appreciably its activity after treatment with chloride-based salts (from 62% to 97% for the sample treated with TiCl4). The insertion of chloride in UiO-66 framework did not retain the counter-cation Ti(IV). The possible interaction of chloride with UiO-66 framework enhances catalytic activity without structural degradation of catalyst, even after consecutive reaction cycles. Chloride activation method opened a new route to activate efficiently catalytic UiO-66 MOFs. This is a cost-effective method capable to be feasible to other MOFs structures, promoting their catalytic capacities and enlarging their catalytic application.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available