Assembly of ϵ‐Keggin Polyoxometalate from Molecular Crystal to Zeolitic Octahedral Metal Oxide. Issue 41 (10th June 2022)

• Record Type: Journal Article
• Authors: Wang, Jie; Li, Denan; Yang, Honggui; Yao, Shufan; Zhu, Qianqian; Sadakane, Masahiro; Li, Yanshuo; Ueda, Wataru; Zhang, Zhenxin
• Is Part Of: Chemistry. Volume 28:Issue 41(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-06-10
• Subjects: ϵ-Keggin polyoxometalate -- C2 hydrocarbons separation -- microporous -- nickel molybdate -- zeolitic octahedral metal oxides; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.202200618
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: Zeolitic octahedral metal oxides are inorganic crystalline microporous materials with adsorption and redox properties. New ϵ ‐Keggin nickel molybdate–based zeolitic octahedral metal oxides have been synthesized. 31 P NMR spectroscopy shows that reduction of Mo VI ‐based molybdates forms an ϵ ‐Keggin polyoxometalate that immediately transfers to the solid phase. Investigation of the formation process indicates that a low Ni concentration, insoluble reducing agent, and long synthesis time are the critical factors for obtaining the zeolite octahedral metal oxides rather than the ϵ ‐Keggin polyoxometalate molecule. The synthesized zeolitic nickel molybdate with Na + is used as the adsorbent, which effectively separates C2 hydrocarbon mixtures. Abstract : Investigating the formation process of zeolitic octahedral metal oxides (ZOMOs) shows that controlling Ni content, reducing agent, and synthesis time ϵ ‐Keggin nickel molybdate‐based ZOMOs or molecules. The zeolitic nickel molybdates are effective for C2 hydrocarbon separation.