Multifunctionalized zirconium-based MOF as a novel support for dispersed copper: application in CO2 adsorption and catalytic conversion

被引:4
|
作者
Rosado, Albert [1 ]
Popa, Ioana-Maria [2 ]
Markeb, Ahmad Abo [3 ,4 ]
Moral-Vico, Javier [3 ]
Naughton, Eva Maria [6 ]
Eckhardt, Hans-Georg [6 ]
Ayllon, Jose A. [5 ]
Lopez-Periago, Ana M. [1 ]
Domingo, Concepcion [1 ]
Negahdar, Leila [6 ]
机构
[1] CSIC, ICMAB, Mat Sci Inst Barcelona, Campus UAB S-N, Bellaterra 08193, Spain
[2] Rhein Westfal TH Aachen, Dept Chem, D-52074 Aachen, Germany
[3] UAB, Dept Chem Biol & Environm Engn, Campus UAB S-N, Bellaterra 08193, Spain
[4] Assiut Univ, Fac Sci, Dept Chem, Assiut 71516, Egypt
[5] UAB, Dept Chem, Campus UAB S-N, Bellaterra 08193, Spain
[6] Univ Coll Dublin, Sch Chem, Dublin, Ireland
关键词
METAL-ORGANIC FRAMEWORKS; CARBON-DIOXIDE ADSORPTION; METHANOL SYNTHESIS; THIN-FILMS; NU-1000; HYDROGENATION; FUNCTIONALIZATION; NANOPARTICLES;
D O I
10.1039/d4ta03268c
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
CO2 conversion and utilization for global sustainability is an integral part of greenhouse gases management, typically for the production of fuels and specialty chemicals. Added value products, such as methanol, methane or formate, can be obtained by electrocatalysis and thermocatalysis, the two techniques addressed in this study. The main motivation of this study is to develop a copper based catalyst active in both processes, confronting the main concerns regarding typical metal catalysts related to nanoparticles aggregation and concomitant deactivation. For this, modified NU-1000, a water-stable mesoporous MOF, is used as a platform for the simultaneous coordination-stabilization of copper single atoms and CO2 adsorption. NU-1000 is synthetized with primary amino groups (-NH2 with affinity for CO2) by modifying the ligand prior to MOF synthesis, while post-synthetic solvent-assisted ligand incorporation is applied to insert thiol functionalities (-SH with affinity for copper) within the framework. To make the functionalized MOF catalytically active, a Cu2+ salt is impregnated into the MOF channels, which is further reduced with H-2 to Cu+/Cu-0 before performance assessment in CO2 conversion processes. The as-synthetized and spent catalysts were analysed regarding the structure (X-ray diffraction, infrared), bulk (mass spectrometry) and surface (X-ray photoelectron spectroscopy) composition, morphology (electronic microscopy and energy dispersive spectroscopy) and textural properties (N-2 physisorption). The electrocatalytic reduction of CO2 was performed in the potential range of -0.8 to -1.8 V, indicating the formation of formic acid. Thermocatalytic experiments were carried out in an economically and energetically sustainable low-pressure (1 MPa) hydrogenation process. Methanol was obtained with 100% selectivity at temperatures up to 280 degrees C, and a space-time yield of ca. 100 mg(MeOH) g(cat)(-1) h(-1) which overcomes that of commercial CuZnO NPs designed for this purpose.
引用
收藏
页码:21758 / 21771
页数:15
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