摘要
以低聚合度酚醛树脂为碳源、三嵌段共聚物F127(Mw=12600,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(400～800W)快速(15～60min)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614m2·g-1和0.47cm3·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4m2·g-1增加到29m2·g-1。
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.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2010年第2期305-312,共8页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金(No.50871053)
航空科学基金(No.2007ZF52061)资助项目
关键词
介孔碳
微波
修饰
胶体钯
mesoporous carbon
microwave
surface modification
colloid palladium
