摘要
以NaBH4为还原剂制备均匀分散的Pd/C催化剂,考察其在乙二醛选择性氧化生成乙醛酸的催化效率及负载量、反应温度、空气流速、pH值等的影响,发现当Pd负载量(质量分数)为4.7%时,在50℃、100 mL/min空气流速和pH=7.7条件下反应3.5 h可获得乙醛酸的最佳得率30%,优于氢气或甲醛还原制备的Pd/C催化剂.
A novel Pd/C catalyst with highly dispersed Pd nanoparticles was prepared by NaBH4 reducing Pd2＋ anchored on the activated carbon support and used for the selective oxidation of glyoxal to glyoxylic acid.At Pd loading of 4.7%,the reaction temperature of 50℃,the air flow rate of 100 mL/min,the pH value of 7.7,the reaction time of 3.5 h,the maximum yield of glyoxylic acid reached 30%,better than those obtained on other Pd/C catalysts prepared by reducing Pd2＋ with either hydrogen flow or formaldehyde aqueous solution.
出处
《云南民族大学学报（自然科学版）》
CAS
2010年第6期391-394,共4页
Journal of Yunnan Minzu University:Natural Sciences Edition
基金
国家自然科学杰出青年基金(20825724)
