A Large-Scale Strategy to Synthesize the Palladium Concave Nanocubes with High-Index Facets for Sustainable Enhanced Catalytic Property
Noble metal nanostructures possessing highly catalytic performance have been actively applied in catalysis, enhanced Raman scattering spectrum, and photothermal treatment for tumors. Furthermore, the size and morphologies of metal nanocrystals could be key factors in promoting their electrocatalytic activity, surface plasmon resonance and spectral property. However, it is hard to realize large-scale production as well as unique shape due to the complicated and uncontrollable synthesis process.
A research group led by Prof. CAI Lintao at Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences developed a scalable strategy to synthesize palladium concave nanocubes (PdCNs)with high-index facets via tuning reduction kinetics. Moreover, they scaled up fabrication of PdCNs by approaching the volume of all species to fifty times, which was in high-yield production but still maintaining well-designed concave nanocubes morphology with high-index facets. As expected, these PdCNs exhibited a dramatically higher enhanced catalytic property for methanol oxidation, comparing with the normal Pd nanocubes enclosed by low-index facets, and commercial Pd/C. The success of engineering large-yield PdCNs with promoted catalytic performance would upgrade the pathway for designing more efficient catalysts. These results were published in Scientific Reports (http://www.nature.com/srep/2015/150217/srep08515/full/srep08515.html )
This study first obtained large-scalable synthesis of PdCNs with high-index facets via a facile approach, which achieved highly electrocatalytic property and stability. It would provide a bright prospect for achieving large-scale preparation of noble metal nanostructures with distinctive morphologies simultaneously.
The work was supported by the National Natural Sciences Foundation of China (21401211), the National Basic Research Program of China (973 Program No. 2011CB933600), the Science and Technology Innovation Fund of Shenzhen (JCYJ20130401170306832), SIAT Innovation Program for Excellent Young Researchers (201309), and Guangdong Innovation Research Team of Low-cost Healthcare.
Figure caption: Morphology and lattice structure of Pd concave nanocubes (PdCNs). (A) SEM images of the PdCNs. (B) TEM image of PdCNs. (C) 3D model of high-index (730) facets. (D1, D3) high resolution bright-field TEM images of single PdCN. (D2) 3D model of PdCNs. (D4) selected area electron diffraction (SAED) pattern of PdCNs.
Figure from Scientific Reports, 2015, 5, doi:10.1038/srep08515.
CAI Lintao, Ph. D.
Guangdong Key Laboratory of Nanomedicine, CAS Key Laboratory of Health Informatics, Institute of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, P. R. China.
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