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dual template-induced construction of three-dimensional porous SiO_(2)/NC/Co-CNTs heterostructure with highly dispersed active sites for efficient oxygen evolution reaction

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Tungsten 2024年第3期6卷 585-595页

作者： Hai-Qi Zhang Xiao-Jun Zeng Qing-Qing Zhang Zu-Liang Zhang Chu-Long Jin Rong-Hai Yu School of Materials Science and Engineering Jingdezhen Ceramic UniversityJingdezhen 333403China School of Materials Science and Engineering Beihang UniversityBeijing 100191China

The development and exploration of efficient and economical electrocatalysts for oxygen evolution reaction(OER)represents the main bottleneck to unlocking a sustainable energy scenario based on elec trocataly tic water *** scale integration of three-dimensional(3D)porous heterostructure with highly dispersed active sites and good structural stability is ***,a dual template route is developed to construct the 3D porous SiO_(2)/nitrogen-doped carbon(NC)/Co-carbon nano tubes(CNTs)hetero ***,the hard template(SiO_(2) nano spheres)contributes to 3D porous structure,increases the specific surface area,and promotes the contact area of the *** the same time,the soft template(basic zinc carbonate)can control the growth of 1D CNTs and facilitate the exposure of the active ***,3D porous SiO_(2)/NC/Co-CNTs hetero structure inherits highly dispersed Co nanoparticles coated by *** conductive channels and abundant N hetero atoms doping are reasonably constructed by a dual template ***,SiO_(2)/NC/Co-CNTs catalyst provides an extraordinary activity for the OER in alkaline media,with a low overpotential of 298 mV at a current density of 10 mA·cm^(-2).Furthermore,SiO_(2)/NC/Co-CNTs hetero structure enables excellent long-term durability with a 10 mV decay in overpotential after 3000 cyclic voltammetry cycles,and 97%remain in current density over 20 *** is believed that this dual template strategy can provide a new and simple way to construct a highly dispersed active site in electrocatalysts.

关键词： dual template High dispersion Porous heterostructure Conductive channels Oxygen evolution reaction

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Supercritical CO2 as a dual template for fabrication of mesoporous cobalt metal-organic framework

Supercritical CO2 as a Dual template for fabrication of meso...

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河南省化学会2016年学术年会

作者： Xin Tong Huanan Yu Qun Xu College of Materials Science and Engineering Zhengzhou University

MOFs have emerged as an attractive material for a remarkably wide range of potential applications,including gas separation, drug delivery, catalysis, and energy storage. Recently, efforts are being devoted to the use of MOFs as energy materials. Ionic liquids(ILs) and supercritical CO(SC CO), known as unconventional and green solvents, have gained much attention in the synthesis of new materials. We build up a reaction system that contains surfactant, ionic liquid and SC CO, to help the surfactant-directed assemble of porous structure. The system is bi-functional, one function is to create dispersed phase of microemulsions containing SC CO, and the other is to form continuous phase of ionic liquid. During the synthesis of nanospheres, CO takes on a dual function.

关键词： metal-organic framework supercritical CO2 ionic liquid mesopores dual template

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Synthesis Optimization of SSZ-13 Zeolite Membranes by dual templates for N_(2)/NO_(2) Separation

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Chemical Research in Chinese Universities 2022年第1期38卷 250-256页

作者： LI Jun RONG Huazhen CHEN Cong LI Ziyi ZUO Jiayu WANG Wenjian LIU Xinjian GUAN Yixing YANG Xiong LIU Yingshu ZOU Xiaoqin ZHU Guangshan School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083P.R.China Faculty of Chemistry Northeast Normal UniversityChangchun 130024P.R.China Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of ChinaChengdu 610213P.R.China

High-silica SSZ-13 zeolite membranes are promising in industrial separations of light gases and continuous membranes are highly demanded for better separation performances. Herein, pure-phase, continuous and thin SSZ-13 zeolite membranes were synthesized using dual templates of N,N,N-trimethtyl-1-adamantammonium hydroxide(TMAdaOH) and tetraethylammonium hydroxide(TEAOH). Systematical investigations of TMAdaOH/TEAOH ratios and their concentrations show that TMAdaOH acts as the main structure-directing agent in the formation of the SSZ-13 zeolite. TMAdaOH cooperatively plays with TEAOH in promoting the SSZ-13 crystal intergrowth to form a continuous polycrystalline membrane. Additionally, appropriate introduction of TEAOH is able to adjust the membrane thickness to the crystal-comparable size of ca. 2.0 μm. The SSZ-13 membranes are further applied for N2/NO2separation, which is firstly reported on zeolite membranes. The gas permeation results show that the SSZ-13 membrane synthesized by the dual-template approach exhibits selective separation of N2 over NO2 with N2/NO2 separation factor of 7.6 and N2 permeance of 1.66×10-8 mol·m-2·s-1·Pa-1.

关键词： Zeolite membrane dual template SSZ-13 Gas separation Nitrogen dioxide

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