STEP organic synthesis: an efficient solar, electrochemical process for the synthesis of benzoic acid
STEP organic synthesis: an efficient solar, electrochemical process for the synthesis of benzoic acid
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DOI：
10.1039/c4gc01448k
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发表时间：
2014-10
期刊：
影响因子：
9.8
通讯作者：
Yanji Zhu;Baohui Wang;Xuelin Liu;Wang Huaiyuan;Hongjun Wu;S. Licht
中科院分区：
文献类型：
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作者：
Yanji Zhu;Baohui Wang;Xuelin Liu;Wang Huaiyuan;Hongjun Wu;S. Licht
本研究首次演示了有机合成的 STEP。苯甲酸的合成完全由太阳能驱动，无需输入任何其他形式的能源。 STEP（太阳能热电化学工艺）的建立是为了利用太阳热来驱动化学反应，从而最大限度地减少能量并最大限度地提高不断增长的电解反应组合的速率。使用太阳能可以最大限度地减少或消除与社会必需品生产相关的碳足迹。迄今为止，这包括用于以高太阳能效率生产氢燃料、二氧化碳分解产生燃料和石墨、赤铁矿（铁矿石）分解铁金属、从石灰石中分解石灰以及生产漂白剂、镁和其他有用化学品的STEP化学品。苯甲酸由甲苯电解产生。太阳热能和太阳能电能协同驱动电解；太阳能热能降低所需的电解电压，并提高反应的动力学、选择性和产率，同时太阳能电流驱动电解。低电解电位抑制产品的过度氧化。在施加 3 V 光势的苯甲酸步骤有机合成中，苯甲酸的反应转化率在 30 °C 温度下为 3.9%，在 60 °C 下为 12.4%，在 90 °C 下为 32.0%。结果表明STEP适用于从甲苯高效合成苯甲酸。
This study presents the first demonstration of STEP for organic synthesis. The synthesis of benzoic acid was fully driven by solar energy without the input of any other forms of energy. STEP (the Solar Thermal Electrochemical Process) was established to drive chemical reactions by using solar heat to minimize the energy and maximize the rate of a growing portfolio of electrolysis reactions. The use of solar energy can minimize or eliminate the carbon footprint associated with the production of societal staples. To date this has included STEP chemistries for the high solar efficiency generation of hydrogen fuels, carbon dioxide splitting to generate fuels and graphite, hematite (iron ore) splitting for iron metal, of lime from limestone, and the production of bleach, magnesium and other useful chemistries. Benzoic acid is produced by the electrolysis of toluene. Solar thermal and solar electrical energy synergistically drive the electrolysis; solar thermal decreases the requisite electrolysis voltage, and improves the kinetics, selectivity and yield of the reaction, while solar electrical current drives the electrolysis. The low electrolysis potential inhibits over-oxidation of the product. In this STEP organic synthesis of benzoic acid at an applied photopotential of 3 V the reaction conversion of benzoic acid is 3.9% at a temperature of 30 °C, 12.4% at 60 °C, and 32.0% at 90 °C. The results demonstrate that the STEP is suitable for an efficient synthesis of benzoic acid from toluene.