期刊
CRYSTENGCOMM
卷 21, 期 24, 页码 3654-3659出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ce00457b
关键词
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资金
- National Natural Science Foundation of China [51873100]
- Fundamental Research Funds for the Central Universities [GK201901002]
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.
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