Facile synthesis of porous PdCu nanoboxes for efficient chromium(vi ) reduction
| Autor: | Bin Qiao, Jing-Yi Zhu, Pei Chen, Gengtao Fu, Yu Chen, Yanping Liu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Nanostructure
Materials science Formic acid Nanoparticle 02 engineering and technology General Chemistry Activation energy 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Heterogeneous catalysis 01 natural sciences 0104 chemical sciences Catalysis chemistry.chemical_compound Chemical engineering chemistry Galvanic cell General Materials Science Dehydrogenation 0210 nano-technology |
| Zdroj: | CrystEngComm. 21:3654-3659 |
| ISSN: | 1466-8033 |
| DOI: | 10.1039/c9ce00457b |
| Popis: | Hollow porous nanostructures offer a multitude of advantages for heterogeneous catalysts over solid nanoparticle catalysts. Herein, we reported the facile synthesis of PdCu nanoboxes with porous shells through a Cu2O template-assisted strategy, enabling efficient chromium-VI (Cr(VI)) reduction. The synthesis procedure involved the formation of well-defined Cu2O nanocubes and the transformation of partial Cu2O into a PdCu shell by a galvanic reaction. The structure/composition and formation mechanism of the PdCu nanoboxes were investigated in detail. When used as a heterogeneous catalyst, in the presence of formic acid (HCOOH), the PdCu nanobox demonstrated an excellent catalytic effect for Cr(VI) reduction with low activation energy (Ea = 47.8 kJ mol−1) and a high kinetic constant (k = 0.274 min−1). Moreover, the PdCu nanoboxes were recycled ten times without significant reduction in the transformation efficiency. The improved catalysis originated from the unique structure-/composition-dependent merits of the porous PdCu nanoboxes, which effectively promoted the dehydrogenation decomposition of HCOOH molecules. |
| Databáze: | OpenAIRE |
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