期刊
JOURNAL OF SOLID STATE CHEMISTRY
卷 258, 期 -, 页码 582-587出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2017.11.033
关键词
Cu2O/CuO; Cu-BTC derivate; Atmosphere; CO oxidation
资金
- National Natural Science Foundation of China [21507086, 51508327]
- Open Foundation of Key Laboratory of Industrial Ecology, China [KLIEEE-14-08]
- Shanghai Sailing Program [14YF1409900, 16YF1408100]
A series of octahedral structure Cu-BTC derivatives were successfully achieved through direct calcination of copper based metal organic framework Cu-BTC under different atmosphere (CO reaction gas, oxidizing gas O-2, reducing gas H-2, inert gas Ar). The Cu-BTC derivatives were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), laser Raman spectroscopy (LRS), N-2 adsorption-desorption isotherm, element analysis, H-2-temperature program reduction (H-2-TPR) and X-ray photoelectron spectroscopic (XPS). It is found that Cu-BTC derivative derived from MOF calcined under reaction gas/O-2 (Cu-BTC-CO/Cu-BTC-O) only retain Cu2O and CuO species. In addition, a weak Cu-BTC structure and Cu particles were observed on Cu-BTC derivative derived from MOF calcined under H-2 (Cu-BTC-H). Obviously differently, Cu-BTC derivative derived from MOF calcined under Ar (Cu-BTC-Ar) still retains good MOF structure. The catalytic performance for CO oxidation over Cu-BTC derivatives was studied. It was found that Cu-BTC-CO showed a smaller specific surface area (8.0 m(2)/g), but presented an excellent catalytic performance, long-term stability and cycling stability with a complete CO conversion temperature (T-100) of 140 degrees C, which was ascribed to the higher Cu2O/CuO ratio, good low temperature reduction behavior and a high quantity of surface active oxygen species.
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