Controllable oxidation of glucose to gluconic acid and glucaric acid using an electrocatalytic reactor
Controllable oxidation of glucose to gluconic acid and glucaric acid using an electrocatalytic reactor
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使用电催化反应器将葡萄糖可控氧化为葡萄糖酸和葡萄糖二酸
DOI：
10.1016/j.electacta.2014.02.128
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发表时间：
2014-06-01
影响因子：
6.6
通讯作者：
Li, Zhenhuan
中科院分区：
文献类型：
--
作者：
Bin, Deshan;Wang, Hong;Li, Zhenhuan
目前正在对高效和选择性地将葡萄糖转化为高附加值化学品进行深入研究。为此，采用功能性电催化反应器，在温和条件下，高效地从葡萄糖生产葡萄糖酸（GA）和葡萄糖二酸（GLA）。该反应器由负载纳米MnO 2的管状多孔钛电极（MnO 2/Ti电极）作为阳极，不锈钢网作为阴极组装而成。考察了MnO 2负载量、pH值、葡萄糖浓度（C-0 glucos）、反应温度、停留时间和电流密度对葡萄糖氧化反应的影响。结果表明，在此条件下，葡萄糖的转化率为98%，GA和GLA的总选择性为98结果表明，在MnO 2/Ti电极上，GA的选择性为43%，GLA的选择性为55（4.98wt%MnO2负载）下的反应器操作条件：50.5 mmol L-1的葡萄糖水溶液，反应温度30 ℃，停留时间19 min，电流密度4 mA cm（-2），pH 7。通过进一步增加电流密度至6 mA cm（-2），获得了99%的葡萄糖转化率和99%的GA和GLA总选择性（GA选择性为15%，GLA选择性为84%）。葡萄糖可控氧化的优异性能主要归因于电化学氧化和对流强化传质以及反应器中所需产物的及时去除。(C)2014爱思唯尔有限公司版权所有。
Intense research is being done on the highly efficient and selective conversion of glucose into high value-added chemicals. For this purpose, a functional electrocatalytic reactor was employed to efficiently produce gluconic acid (GA) and glucaric aicd (GLA) from glucose under mild condition. The reactor was assembled by a nano-MnO2 loading tubular porous titanium (Ti) electrode (MnO2/Ti electrode) as anode and a stainless steel mesh as cathode. The effects of MnO2 loading, pH value, glucose concentration (C-0glucos), reaction temperature, residence time and current density on the glucose oxidation were investigated during the reactor operation. The results indicated that 98% conversion of glucose and 98% total selectivity to GA and GLA (43% selectivity to GA and 55% selectivity to GLA) were obtained by electrocatalysis using the MnO2/Ti electrode (4.98 wt% MnO2 loading) under the operating conditions of the reactor: an aqueous glucose solution of 50.5 mmol L-1, a reaction temperature of 30 degrees C, a residence time of 19 min, a current density of 4 mA cm(-2) and pH of 7. By further increasing the current density to 6 mA cm(-2), 99% conversion of glucose and 99% total selectivity to GA and GLA (15% selectivity to GA and 84% selectivity to GLA) were obtained. The excellent performance of the controllable oxidation of glucose is mainly attributed to the electrochemical oxidation and convection-enhanced mass transfer as well as to the timely removal of the desired products in the reactor. (C) 2014 Elsevier Ltd. All rights reserved.