Aerobic Oxidation of Hydroxymethylfurfural and Furfural by Using Heterogeneous CoxOy-N@C Catalysts
Aerobic Oxidation of Hydroxymethylfurfural and Furfural by Using Heterogeneous CoxOy-N@C Catalysts
复制标题
非均相 CoxOy-N@C 催化剂有氧氧化羟甲基糠醛和糠醛
DOI：
10.1002/cssc.201402843
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发表时间：
2014
期刊：
影响因子：
8.4
通讯作者：
Fu Yao
中科院分区：
文献类型：
--
作者：
Deng Jin;Song Hai-Jie;Cui Min-Shu;Du Yi-Ping;Fu Yao
2，5-呋喃二甲酸（FDCA）被认为是对苯二甲酸的有前途的替代品，因为它们具有相似的结构和性质。与FDCA相比，2，5-呋喃二甲酸甲酯（FDCAM）具有易于纯化的特性。本文报道了以CoxOy-N@C为催化剂，O2为氧化剂，5-羟甲基糠醛（HMF）和糠醛氧化酯化制备相应酯的反应。在优化条件下，FDCAM和2-糠酸甲酯的收率和选择性均较高。对影响产品分布的因素进行了彻底的检查。将CoxOy-N@C催化剂再循环五次，没有检测到活性的显著损失。催化剂的表征可以解释这种现象。利用XPS和TGA等手段，研究了配体和热解温度对催化剂活性的影响。
2,5‐Furandicarboxylic acid (FDCA) is considered to be a promising replacement for terephthalic acid since they share similar structures and properties. In contrast to FDCA, 2,5‐furandicarboxylic acid methyl (FDCAM) has properties that allow it to be easily purified. In this work, we reported an oxidative esterification of 5‐hydroxymethylfurfural (HMF) and furfural to prepare corresponding esters over CoxOy–N@C catalysts using O2as benign oxidant. High yield and selectivity of FDCAM and methyl 2‐furoate were obtained under optimized conditions. Factors which influenced the product distribution were examined thoroughly. The CoxOy–N@C catalysts were recycled five times and no significant loss of activity was detected. Characterization of the catalysts could explain such phenomena. Using XPS and TGA, we made a thorough investigation of the effects of ligand and pyrolysis temperature on catalyst activity.