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Chemistry

Title:		Platinum-Supported Zirconia Nanotube Arrays Supported on Graphene Aerogels Modified with Metal-Organic Frameworks: Adsorption and Oxidation of Formaldehyde at Room Temperature
Author(s):		Tan H; Chen D; Li N; Xu Q; Li H; He J; Lu J;
Address:		"College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, P.R. China"
Journal Title:		Chemistry
Year:		2019
Volume:		20191126
Issue:		72
Page Number:		16718 - 16724
DOI:		10.1002/chem.201904426
ISSN/ISBN:		1521-3765 (Electronic) 0947-6539 (Linking)
Abstract:		"Precious-metal catalysts (e.g., Au, Rh, Ag, Ru, Pt, and Pd) supported on transition-metal oxides (e.g., Al(2) O(3) , Fe(2) O(3) , CeO(2) , ZrO(2) , Co(3) O(4) , MnO(2) , TiO(2) , and NiO) can effectively oxidize volatile organic compounds. In this study, porous platinum-supported zirconia materials have been prepared by a 'surface-casting' method. The synthesized catalysts present an ordered nanotube structure and exhibited excellent performance toward the catalytic oxidation of formaldehyde. A facile method, utilizing a boiling water bath, was used to fabricate graphene aerogel (GA), and the macroscopic 3D Pt/ZrO(2) -GA was modified by introducing an adjustable MOF coating by a surface step-by-step method. The unblocked mesoporous structure of the graphene aerogel facilitates the ingress and egress of reactants and product molecules. The selected 7 wt.% Pt/ZrO(2) -GA-MOF-5 composite demonstrated excellent performance for HCHO adsorption. Additionally, this catalyst achieved around 90 % conversion when subjected to a reaction temperature of 70 degrees C (T(90 %) =70 degrees C). The Pt/ZrO(2) -GA-MOF-5 composite induces a catalytic cycle, increasing the conversion by simultaneously adsorbing and oxidizing HCHO. This work provides a simple approach to increasing reactant concentration on the catalyst to increase the rate of reaction"
Keywords:		heterogeneous catalysis metal-organic frameworks oxidation platinum zirconium;
Notes:		"PubMed-not-MEDLINETan, Haocun Chen, Dongyun Li, Najun Xu, Qingfeng Li, Hua He, Jinghui Lu, Jianmei eng Germany 2019/10/28 Chemistry. 2019 Dec 20; 25(72):16718-16724. doi: 10.1002/chem.201904426. Epub 2019 Nov 26"