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第 36 卷第 4 期 精 细 化 工 Vol.36, No.4
201 9 年 4 月 FINE CHEMICALS Apr. 2019

催化与分离提纯技术
介孔碳负载 Pt 催化剂用于抗氧剂 7PPD 的合成

丁军委，程秋振，于文龙，钟 缘

（青岛科技大学 化工学院，山东 青岛 266042）

摘要：以纳米氧化锌为模板剂，酚醛树脂为碳源，采用硬模板法制备了介孔碳（MC），并以其为载体制备了 Pt/MC
催化剂，同时，以商品化活性炭（AC）为载体制备了 Pt/AC 催化剂。对制备的样品进行 BET、SEM、ICP 和
TEM 表征。结果表明，氧化锌模板剂可有效调控介孔碳的比表面积和孔结构，Pt/MC 催化剂和 Pt/AC 催化剂的
Pt 负载量（质量分数，下同）均为 2.8%左右，活性金属粒径均为 1.8 nm 左右。将制备的 Pt/MC 催化剂用于抗
氧剂 N-(1,4-二甲基戊基)-N'-苯基对苯二胺(7PPD)的合成，与普通 Pt/AC 催化剂相比，4-氨基二苯胺 (p-ADPA)
的转化率由 97.5%提高至 100%，7PPD 选择性由 94.2%提高至 99.5%，催化剂的稳定性明显提高。CO 化学吸附、
ICP、N 2 低温物理吸脱附表征结果表明，催化剂载体的孔结构是影响催化剂稳定性的重要因素。当平均孔径较
小时，7PPD 等较大尺寸的分子容易堵塞孔道；当平均孔径较大时，孔壁较薄，催化剂使用过程中容易磨损，导
致活性组分流失。
关键词：介孔碳；Pt/MC 催化剂；孔结构；抗氧剂 7PPD；降活原因；催化技术
中图分类号：TQ 246.3 文献标识码：A 文章编号：1003-5214 (2019) 04-0677-07

Mesoporous Carbon Supported Pt Catalysts for the
Synthesis of Antioxidant 7PPD

DING Jun-wei, CHENG Qiu-zhen, YU Wen-long, ZHONG Yuan
(College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, Shandong, China)

Abstract: Mesoporous carbon (MC) samples were prepared by hard template method using nano-zinc
oxide particles with different size as template agents and phenolic resin as carbon source. A series of Pt/MC
catalysts were prepared. Meanwhile, Pt/AC catalyst was prepared using commercial activated carbon (AC)
as supports. These samples were characterized by N 2 adsorption-desorption, SEM, ICP and TEM. The
results showed that nano-zinc oxide particles could effectively control the surface area and pore structure of
mesoporous carbon supports. Pt loadings on MC and AC were 2.8% (mass fraction, the same below). The
sizes of Pt nanoparticles were about 1.8 nm. These catalysts were used to synthesize antioxidant
N-(1,4-dimethylpentyl)-N'-phenylbenzene-1,4-diamine (7PPD). Compared with those of the conventional
Pt/AC catalyst, the conversion of 4-aminodiphenylamine (p-ADPA) increased from 97.5% to 100%, and the
selectivity of 7PPD increased from 94.2% to 99.5%. The stability of the Pt/MC catalysts was obviously
higher than that of Pt/AC catalyst. The fresh and used catalysts were characterized by CO chemisorption,
ICP and N 2 adsorption-desorption. It was found that the pore structure of the support was an important
factor affecting the stability of the catalyst. When the average pore diameter of the catalyst was small,
molecules of 7PPD and other large sizes were easy to block the pore passages. While the average pore
diameter was larger, the pore walls were thinner and catalysts were worn easily, and the active component
was lost easily.
Key words: mesoporous carbon; Pt/MC catalyst; pore structure; antioxidant 7PPD; reason of deactivation;
catalysis technology
Foundation item: Shandong Provincial Natural Science Foundation (ZR2017ZC0630)

收稿日期：2018-08-27; 定用日期：2018-12-14; DOI: 10.13550/j.jxhg.20180627
基金项目：山东省自然科学基金重大基础研究项目（ZR2017ZC0630）
作者简介：丁军委（1970—），男，教授，E-mail：djwnsfc@126.com。