【摘要】 以嵌段共聚物P123为模板制备介孔氧化硅SBA-15,并以此SBA-15为模板,以蔗糖为碳源在不同的温度下(600-900℃)制备介孔碳CMK-3.采用浸渍还原法,以硼氢化钠为还原剂,制备介孔碳载Pt电催化剂,即20%(w)Pt/CMK-3.利用循环伏安法(CV)、计时电流法等测试电催化剂对甲醇的催化氧化性能及稳定性.预吸附单层CO溶出伏安法研究测试催化剂抗CO中毒能力.结果表明在烧制温度为900℃时制备的介孔碳载Pt催化剂具有最好的催化性能和稳定性,而在烧制温度为700℃时制备的介孔碳载Pt催化剂对CO有较低的溶出电位.更多还原

【Abstract】 Using mesoporous SiO2(SBA-15) as templates and sugar as a carbon precursor,mesoporous carbon(CMK-3) was prepared at different temperatures(600-900 ℃).20%(w) Pt/CMK-3 was then prepared by impregnation reduction with sodium borohydride as a reductant.Cyclic voltammetry(CV) and chronoamperometry were applied to study the catalytic performance and stability toward methanol oxidation for the as-prepared catalyst.CO striping voltammetry was used to determine its anti-poisoning capability toward CO.The results show that the Pt/CMK-3 prepared at 900 ℃ had the best catalytic performance and stability toward methanol but at a carbonization temperature of 700 ℃ the Pt catalyst had a lower stripping potential to CO.更多还原