| 有序介孔碳的微波快速合成和表面修饰及其负载性能 |
| Ordered Mesoporous Carbon: Rapid Microwave-Assisted Synthesis, Surface Modification and Loading Performance |
|
| 摘要: 以低聚合度酚醛树脂为碳源、三嵌段共聚物F127(Mw=12 600，PEO106PPO70PEO106)为模板导向剂，以微波辐照替代传统的烘箱热聚合，在常见功率下(400～800 W)快速(15～60 min)聚合，并高温碳化获得介孔碳。XRD、TEM、低温N2吸脱附等测试表明所得样品具有高度有序的介孔结构，比表面积和孔容分别可达614 m2·g-1和0.47 cm3·g-1。合成的介孔碳经NaBH4和胶体钯溶液两步修饰处理，表面被活化并沉积了Pd颗粒，导电性和亲水性均得到改善，载Pt的量和分散性明显提高，Pt/C催化剂的电化学活性面积由4 m2·g-1增加到29 m2·g-1。 |
| 关键词: 介孔碳 微波 修饰 胶体钯 |
| 基金项目: |
| Abstract: Ordered mesoporous carbon(OMC) was synthesized using low-polymerization-degree phenolic resin as carbon precursor, and triblock copolymer F127(Mw=12 600，PEO106PPO70PEO106) as a structure-directing agent by microwave irradiation heating method. XRD, TEM and low temperature nitrogen adsorption results show that the as-prepared OMC possess highly ordered mesoporous structure with BET surface area of 614 m2·g-1 and pore volume of 0.47 cm3·g-1. The OMC surface modification with respective NaBH4 and colloid palladium solution results in activated and deposited Pd particles on the surface. Due to the enhanced conductivity and hydrophilicity of carbon surface, well-dispersed and high-loading Pt nanoparticles were obtained, as evidenced by the increase of electrochemically active surface area from 4 to 29 m2·g-1. |
| Keywords: mesoporous carbon microwave surface modification colloid palladium |
| |
| 摘要点击次数: 2385 |
| 全文下载次数: 3264 |
| 王道军,王 涛,周建华,孙 盾,狄志勇,何建平.有序介孔碳的微波快速合成和表面修饰及其负载性能[J].无机化学学报,2010,26(2):305-312. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| Support information: |
|
|
|
|
|
|
