摘要
以H2PtCl6为前驱体、采用化学还原法制备Pt胶体,然后将其负载于不同种类的活性炭上制备了1.0%Pt/C催化剂并应用于催化氧化乙二醛生成乙醛酸的反应。研究了活性炭的种类对催化活性的影响;比较了各种1.0%Pt/C催化剂催化乙二醛反应的结果。根据对产物溶液中的各组分的分析,结果表明以聚乙二醇(PEG)为保护剂、硼氢化钠作还原剂所制备的Pt胶体溶液负载在未处理过的国产活性炭(YHB)上获得的催化剂具有良好的催化活性和选择性。在最佳催化剂制备条件下,催化反应达60 min时,乙醛酸的产率即达到了66.88%,选择性为71.77%。
Platinum colloids stabilized with different protective agents were prepared by the chemical re- duction method using H2PtCl6 as precursor. Then the colloids were supported on various activated carbons for obtaining 1.0% Pt/C catalysts, so as to catalyze glyoxal into glyoxalic acid. The effect of the kinds of activated carbons on the catalytic activity was investigated and the results of catalyzing glyoxal reaction by various 1.0% Pt/C catalysts were compared. Based on the analysis of the product solution components, the results showed that the catalyst formed by immersing Pt colloid prepared by PEG as protective agent and sodium borohydride as reducing agent on untreated domestic activated carbon （YHB） has higher cata- lytic activity and selectivity. Under the optimum condition of the catalyst preparation and the catalytic re- action for 60 min, the yield and the selectivity of glyoxylic acid reached 66.88% and 71.77% , respec- tively.
出处
《贵金属》
CAS
CSCD
北大核心
2012年第4期53-59,67,共8页
Precious Metals
基金
院所专项社会发展计划资助项目(2010CF016)
关键词
物理化学
催化材料
PT
C催化剂
制备
乙二醛氧化
乙醛酸
physical chemistry
catalytic materials
Pt/C catalysts
preparation
oxidation of glyoxal
glyoxalic acid
