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Dehydrogenation characteristics of ZrC-doped LiAlH4 with different mixing conditions

Rare Metals 2020年第4期39卷 383-391页

作者： Zi-Liang Li Fu-Qiang Zhai Hao-Chen Qiu Qi Wan Ping Li Xuan-Hui Qu State Key Laboratory for Advanced Metals and Materials Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China Applied Physics Department Polytechnic University of Catalonia-Barcelona08860 CastelldefelsSpain Research Institute of Energy and Materials Technology General Research Institute of Nonferrous MetalsBeijing 100088China

The catalytic effects of ZrC powder on the dehydrogenation properties of LiAlH4 prepared by designed mixing processes were systematically *** onset dehydrogenation temperatures for the 10 mol% ZrC-doped sample are 85.3 and 148.4℃for the first two dehydrogenation stages,decreasing by 90.7 and 57.8℃,respectively,compared with those of the as-received *** isothermal volumetric measurement indicates that adding ZrC powder could significantly enhance the desorption kinetics of *** reaction constant and Avrami index show that the first dehydrogenation stage is controlled by diffusion mechanism with nucleation rate gradually decreasing and the second stage is a freedom nucleation and subsequent growth *** microstructures and phase transformation characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS) and Fourier transform infrared spectroscopy(FTIR) reveal that the improved desorption behavior of LiAlH4 is primarily due to the high density of surface defects and embedded catalyst particles on the surface of LiAlH4 particles during the high-energy mixing process.

关键词： Lithium alanate Zirconium carbide doping methods Dehydrogenation performances Catalytic mechanism

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Heteroatom-Doped Black Phosphorus and Its Application:A Review

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Chinese Journal of Chemistry 2021年第3期39卷 690-700页

作者： Lu-dong He Pei-chao Lian Yuan-zhi Zhu Jun-ping Zhao Yi Mei Faculty of Chemical Engineering Kunming University of Science and TechnologyYunnan Provincial Key Laboratory of Energy Saving in Phosphorus Chemical Engineering and New Phosphorus-based MaterialsKunmingYunnan 650500China

Few-layer black phosphorus(BP)is a promising semiconductor with excellent optoelectronic ***,the poor stabilization and strong asymmetry between electron and hole transports hinder the application of *** of heteroatoms is an effective strategy to regulate the electronic structure and stability of BP without sacrificing its unique 2D structure,which is a promising way to tune the physico-chemical properties of BP for various *** this review,the recent advances in doping engineer-ing of BP are summarized,involving the theoretical prediction of new characteristic for doped BP and the corresponding experimental synthesis *** effects of dopant atoms on the structure and perfor-mance of BP and its related applications,such as the field-effect transistors,optoelectronic devices,in-verter devices,and catalysis,are also summarized.

关键词： Black phosphorus Phosphorus doping methods Physicochemical properties I Sensors

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