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Solvent⁃Free Synthesis and Characterization of a New Chain Holmium Phosphite with Helical Chains
Xiu Zhijia, Li Honglu, Liu Lu, Ma Yike, Chen Li, Huang Liangliang
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370
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In solvent⁃free condition, a new 1D chain holmium phosphite Ho(H2PO3)4(C6N2H16)0.5 (compound 1) decorated by phosphite groups has been synthesized using N,N'⁃Dimethylpiperazine (Me2ppz) as structure directing agent, and further been characterized by powder XRD, infrared spectroscopy, thermogravimetric, inductively coupled plasma and CHN elemental analyses. Single crystal X⁃ray diffraction analysis reveals that compound 1 crystallizes in the monoclinic crystal system with the P21/c space group. The structure of compound 1 is constructed by HoO6 octahedra and [H2PO3]- pseudo⁃pyramids units via vertex oxygen atoms. It is worth noting that compound 1 is the first rare earth phosphite compound which is synthesized in solvent⁃free condition. Moreover, a pair of left⁃ and righ⁃handed helical chains are present in the structure. In addition, coordination mode and geometry of lanthanide phosphonate, phosphate and phosphite are listed in this paper.
2020, 40 (2): 38-44.
DOI:
10.3969/j.issn.1672-6952.2020.02.007
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Research Progress of Phosphate as Proton Conducting Material Ma Yike1, Yin Yanzhen2, Huang Liangliang1
Ma Yike,Yin Yanzhen,Huang Liangliang
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653
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Phosphate is an important multifunctional crystal material with broad application prospects in catalysis, photoluminescence, gas storage and separation. In recent years, many phosphate compounds and their derivatives have been used in the study of proton conducting materials. In this paper, the mechanism of proton conduction is briefly introduced. From the operating temperature, the phosphate is divided into two categories with 100 ℃ as the demarcation point. The research progress of phosphate as proton conducting material is introduced, and the challenges faced by phosphate as proton conduction material are prospected.
2019, 39 (6): 1-09.
DOI:
10.3969/j.issn.1672-6952.2019.06.001
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Synthesis of Pt Loaded Li
2
Co
2
O
4
and Its Oxygen Evolution Performance
Guan Yang,Yan Fei,Huang Liangliang,Lin Xiao,Wang Jianqiang
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599
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Hydrogen as a clean fuel will play a critical role in the future energy landscape. The hydrogen production reaction of electrolytic water only produces hydrogen and oxygen, which has the advantages of low cost, high efficiency, environmental friendliness and good safety. The oxygen evolution reaction is a key ratecontrolled reaction step in hydrogen production from electrolytic water. A simple Pt loaded Li
2
Co
2
O
4
synthesis method was introduced and its oxygen evolution performance was characterized. The effects of different Pt loading (mass fraction) on the electrocatalytic performance were compared, and the optimum Pt loading was obtained when the Pt loading was 5%. The structure of the material was characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results show that a highly efficient catalyst capable of reducing the Pt consumption while maintaining the activity and durability of the catalyst is obtained.
2018, 38 (05): 30-34.
DOI:
10.3969/j.issn.1672-6952.2018.05.006