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supercapacitor was investigated. The results show that specific surface area and mesoporosity of activated carbon influence specific capacitance. If specific surface area is larger and mesoporosity... surface area is smaller and mesoporosity is higher, the power property will become better. Ash influences leakage current and electrochemical cycling stability. If ash content is lower, the performance......
and electrocatalytic property of tungsten carbide nanoplate with mesoporosity YANG Wei1, SUN Hai-biao1, YU Yang1, TONG Ming-xing1, XIE Wei-miao1, LI Guo-hua1, 2 (1. School of Chemical Engineering, Zhejiang..., and the average diameter of the pore is around 3.5 nm. The nanoplate with mesoporosity is active to methanol electrocatalytic oxidation, and its electrocatalytic property is similar to that of platinum. Key words......
以超临界和亚临界水活化掺金属化合物的酚醛树脂制备球形活性炭 康飞宇1,李颖1,李宝华2,黄正宏1 (1.清华大学材料科学与工程系,先进材料教育部重点实验室,北京,100084;2.清华大学深圳研究生院,新材料研究所,深圳,518055) 摘要:以掺稀土金属化合物氯化铈的酚醛树脂为原料,采用超临界和亚临界水活化制备了具有较好中孔结构和机械强度的球形活性炭.通过77K氮气吸附对所制球形活性炭进行表征,并研究不同活化方法,活化条件对其孔隙结构的影响.结果表明:氯化铈具有催化作用,在超临界水环境下促进了孔结构的发展,优势中孔分布于4nm 和7nm;而活化方法和活化压力对孔结构的影响较小. 关键词:活性炭; 超临界水; 金属催化剂; 中孔; Activated carbon; Supercritical water; Metal catalyst; Mesoporosity; [全文内......
and charge-discharge measurements. The results indicate that the capacitance mainly depends on effective surface area, but the power property mainly depends on mesoporosity. At low specific current (1 A/g... specific current, the specific capacitance of coconut-shell activated carbon with a higher mesoporosity of 75.1% is more excellent. Activated carbon by KOH activation is fitter for aqueous system......
. In addition, HRTEM analysis showed that the materials were highly crystalline. Textural analysis revealed the powders had some mesoporosity, and the surface areas were 76.69 and 65.90 m2/g for materials......
-desorption.TEM micrographs and Brunauer-Emmett-Teller(BET) gas adsorption studies showed that the SiC powder was nanocrystalline and had a specific surface area of 330 m2/g and a mesoporosity in the range of 2-10......
. In addition, HRTEM analysis showed that the materials were highly crystalline. Textural analysis revealed the powders had some mesoporosity, and the surface areas were 76.69 and 65.90 m2/g for materials......
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of the A-TiO2 nano-crystallite show preferential crystallographic orientation, most of them are belong to (001) plane. The average value is 12.90 nm, which can be attributed to mesoporosity. During......
of hydroxyapatite with organized mesoporosity and controllable morphologies, such as sol-gel method, hydrothermal method, precipitation method, mechano- chemical treatment, microemulsion process and templating......
