Hydrothermal synthesis of β-Co(OH)2 nanoplatelets: A novel catalyst for CO oxidation

作者：Deng, Dongyang; Xing, Xinxin; Chen, Nan; Li, Yuxiu; Wang, Yude^*

来源：Journal of Physics and Chemistry of Solids, 2017, 100: 107-114.

DOI：10.1016/j.jpcs.2016.09.021

• beta-Co(OH)(2)
• Nanoplatelets
• CO oxidation
• Catalytic activity

A facile, cost-effective, template-free chemical method was developed for the synthesis of beta-Co(OH)(2) nanoplatelets under the different preparation conditions. The morphology and microstructure of as-synthesized samples were examined by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectrum (XPS), respectively. The observations revealed the formation of a single phase of the hexagonal brucite-like beta-Co(OH)(2), which had an irregular hexagonal disk with angles of adjacent edges of 120 degrees, edge lengths ranging from 200 to 300 nm, and thicknesses of 20-40 nm. When investigated as catalyst for CO oxidation, the beta-Co(OH)(2) nanoplatelets exhibited good catalytic activity for CO. Among beta-Co(OH)(2) nanoplatelets, the sample prepared at 100 degrees C for 8 h performed the best, giving the T-100% (the temperature required for achieving a CO of 100%) of 120 degrees C for the oxidation of CO. There are good correlations of Co3+/Co2+, the absorbed O-x(-) ions and surface OH group with catalytic activity of the samples for CO oxidation.

• 出版日期2017-1
• 单位云南大学