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含单镧系元素的锗钨酸盐[Ln(HO)₂GeWO₄]（Ln = Dy，Er，x = 4,3）的合成、晶体结构、电催化及磁性能

Syntheses, Crystal Structure, Electrocatalytic, and Magnetic Properties of the Monolanthanide-Containing Germanotungstates [Ln(HO) GeWO] (Ln = Dy, Er, = 4,3).

作者信息

Ibrahim Masooma, Mbomekallé Israël M, de Oliveira Pedro, Baksi Ananya, Carter Anthony B, Peng Yan, Bergfeldt Thomas, Malik Sharali, Anson Christopher E

机构信息

Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.

Equipe d'Electrochimie et Photo-électrochimie, Laboratoire de Chimie Physique, Université Paris-Sud, UMR 8000, CNRS-Université Paris Saclay, Orsay F-91405, France.

出版信息

ACS Omega. 2019 Dec 10;4(26):21873-21882. doi: 10.1021/acsomega.9b02846. eCollection 2019 Dec 24.

DOI:10.1021/acsomega.9b02846
PMID:31891065
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6933596/
Abstract

Two monolanthanide-containing polyanions based on monolacunary Keggin germanotungstates [Ln(HO) GeWO] (Ln = Dy, Er, = 4,3) have been synthesized in simple one-pot synthetic procedure and compositionally characterized in solid state by single-crystal X-ray diffraction, powder X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis, and elemental analysis. Electronic absorption and emission spectra of the title compounds in solution were also studied. The [Dy(HO)GeWO] Keggin POM exhibits a slow relaxation of magnetization. The cyclic voltammetry measurements and mass spectrometry were carried out to check the stability of the compounds in solution. Both polyanions prove efficient in the electrocatalytic reduction of nitrite. To our knowledge, this observation establishes the first example of electrocatalysis of nitrite reduction by all inorganic monolanthanide-containing germanotungstates family.

摘要

基于单缺位Keggin锗钨酸盐[Ln(HO)GeWO]（Ln = Dy、Er，= 4,3）合成了两种含单镧系元素的聚阴离子，采用简单的一锅法合成，并通过单晶X射线衍射、粉末X射线衍射、傅里叶变换红外光谱、热重分析和元素分析对其固态组成进行了表征。还研究了标题化合物在溶液中的电子吸收和发射光谱。[Dy(HO)GeWO]Keggin多金属氧酸盐表现出缓慢的磁化弛豫。进行循环伏安测量和质谱分析以检查化合物在溶液中的稳定性。两种聚阴离子在亚硝酸根的电催化还原中均证明有效。据我们所知，这一观察结果建立了所有含单镧系元素的锗钨酸盐家族对亚硝酸根还原进行电催化的首个实例。

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