Login In
Citation:
Chen Dong-Liang, Hu Yu-Hai, Chen Yi, Zhang Xin-Yi, Wei Shi-Qiang. Monolayer Dispersive CuO/γ-Al2O3 Catalyst Studied by XAFS[J]. Acta Physico-Chimica Sinica,
;2003, 19(06): 519-522.
doi:
10.3866/PKU.WHXB20030608
-
The local structures of monolayer dispersive CuO/γ-Al2O3 catalysts prepared by means of impregnation have been investigated by XAFS technique.For the CuO/γ-Al2O3 sample with CuO loading 0.4 mmol/100 m2 lower than the monolayer dispersion threshold,the XAFS results indicate that only the first coordination shell appears in the radial distribution function of Cu atoms,and that the RCu－O and coordination number in the first shell are 0.195 nm and 4,respectively.Hence,we consider that the CuO active species on the surface of γ-Al2O3 are in the form of isolated atomic cluster ().Small amount of CuO nano-grains is formed onto the surface of γ-Al2O3 while the CuO loading is just equal to the threshold 0.8 mmol/100 m2.For sample with CuO loading of 1.2 mmol/100 m2,the local structure of Cu atom in CuO/γ-Al2O3 is similar to that of CuO powder.On the basis of the XAFS results,a monolayer dispersion model of CuO/γ-Al2O3 catalysts has been proposed.
-
-
-
-
[1]
Yang Li , Xiaoxu Liu , Tianyi Ji , Man Zhang , Xueru Yan , Mengjie Yao , Dawei Sheng , Shaodong Li , Peipei Ren , Zexiang Shen . Potassium ion doped manganese oxide nanoscrolls enhanced the performance of aqueous zinc-ion batteries. Chinese Chemical Letters, 2025, 36(1): 109551-. doi: 10.1016/j.cclet.2024.109551
-
[2]
Ying Chen , Xingyuan Xia , Lei Tian , Mengying Yin , Ling-Ling Zheng , Qian Fu , Daishe Wu , Jian-Ping Zou . Constructing built-in electric field via CuO/NiO heterojunction for electrocatalytic reduction of nitrate at low concentrations to ammonia. Chinese Chemical Letters, 2024, 35(12): 109789-. doi: 10.1016/j.cclet.2024.109789
-
[3]
Zhijie Zhang , Xun Li , Huiling Tang , Junhao Wu , Chunxia Yao , Kui Li . Cs2CuBr4 perovskite quantum dots confined in mesoporous CuO framework as a p-n type S-scheme heterojunction for efficient CO2 photoconversion. Chinese Chemical Letters, 2024, 35(11): 109700-. doi: 10.1016/j.cclet.2024.109700
-
[4]
Huanhuan XIE , Yingnan SONG , Lei LI . Two-dimensional single-layer BiOI nanosheets: Lattice thermal conductivity and phonon transport mechanism. Chinese Journal of Inorganic Chemistry, 2025, 41(4): 702-708. doi: 10.11862/CJIC.20240281
-
[5]
Yanan Liu , Yufei He , Dianqing Li . Preparation of Highly Dispersed LDHs-based Catalysts and Testing of Nitro Compound Reduction Performance: A Comprehensive Chemical Experiment for Research Transformation. University Chemistry, 2024, 39(8): 306-313. doi: 10.3866/PKU.DXHX202401081
-
[6]
Yanhui Zhong , Ran Wang , Zian Lin . Analysis of Halogenated Quinone Compounds in Environmental Water by Dispersive Solid-Phase Extraction with Liquid Chromatography-Triple Quadrupole Mass Spectrometry. University Chemistry, 2024, 39(11): 296-303. doi: 10.12461/PKU.DXHX202402017
-
[1]
Metrics
- PDF Downloads(2401)
- Abstract views(3109)
- HTML views(15)
DownLoad: