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• W2093887288 endingPage "035707" @default.
• W2093887288 startingPage "035707" @default.
• W2093887288 abstract "In this paper, we report the anisotropic optical and catalytic properties of wurtzite-type hexagonal CoO (h-CoO) nanocrystals, an unusual nanosized indirect semiconductor material. h-CoO nanoplates and nanorods with a divided morphology have been synthesized via facile solution methods. The employment of flash-heating and surfactant tri-n-octylphosphine favors the formation of plate-like morphology, whereas the utilization of cobalt stearate as a precursor is critical for the synthesis of nanorods. Structural analyses indicate that the basal plane of the nanoplates is (001) face and the growth direction of the nanorods is along the c axis. Moreover, the UV–vis absorption spectra, the corresponding energy gap and the catalytic properties are found to vary with the crystal shape and the dimensions of the as-prepared h-CoO nanocrystals. Furthermore, remarkable catalytic activities for H2 generation from the hydrolysis of alkaline NaBH4 solutions have been observed for the as-prepared h-CoO nanocrystals. The calculated Arrhenius activation energies show a decreasing trend with increasing extension degree along the 〈001〉 direction, which is in agreement with the variation of the charge-transfer energy gap. Finally the maximum hydrogen generation rate of the h-CoO nanoplates exceeds most of the reported values of transition metal or noble metal containing catalysts performing in the same reaction system, which makes them a low-cost alternative to commonly used noble metal catalysts in H2 generation from the hydrolysis of borohydrides, and might find potential applications in the field of green energy." @default.
• W2093887288 created "2016-06-24" @default.
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• W2093887288 date "2013-12-20" @default.
• W2093887288 modified "2023-10-11" @default.
• W2093887288 title "Shape-related optical and catalytic properties of wurtzite-type CoO nanoplates and nanorods" @default.
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• W2093887288 doi "https://doi.org/10.1088/0957-4484/25/3/035707" @default.
• W2093887288 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/24356716" @default.
• W2093887288 hasPublicationYear "2013" @default.
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