Preparations and Applications of IrSnOx Electrode in Electrochemical Synthesis of 2,5-dichlorophenol
- 2017年第23卷 
采用热分解法制备钛基IrSnOx电极，并将电极应用于电催化氧化对二氯苯制备2,5-二氯苯酚，探索了绿色高效的电合成途径. 结果表明，电极表面存在裂纹，中间层Sn:Sb为94:6时裂纹较少，强化寿命较长；电极对对二氯苯电氧化具有较好的循环伏安响应；IrSnOx电极电催化氧化对二氯苯所得产物主要为2,5-二氯苯酚、1,2,4-三氯苯、对氯苯酚等，其中2,5-二氯苯酚选择性达93%，产率57%，显著优于以析氯电极、析氧电极、铂为阳极时，2,5-二氯苯酚的选择性89%、27%、87%和30%、15%、49%的产率，体现了优良的电催化氧化性能.The electrodes of titanium based iridium tin oxides (IrSnOx) have been prepared by traditional thermal decomposition method and further applied to the electrosynthsis of 2,5-dichlorophenol in order to explore a green and high efficient synthesis route. The results showed that the electrode surface existed apparent cracks, while the intermediate layer prepared with Sn:Sb=94:6 existed less cracks and longer life time. The main products of the electrolytic reaction were 2,5-dichlorophenol, p-chlorophenol, and 1,2,4-trichlorobenzene. The electrosynthsis yield of 2,5-dichlorophenol reached 57% and the selectivity of 2,5-dichlorophenol was as high as 93% by using the IrSnOx as an anode, which is obviously better than those obtained by using the commercial chlorine evolution electrode, oxygen evolution electrode and Pt electrode as anodes. The selectivity of 89%, 27%, 87% and the yields of 30%, 15%, 49% were obtained by the commercial chlorine evolution electrode, oxygen evolution electrode and Pt electrode, respectively. The excellent electrocatalytic oxidation performance of the IrSnOx electrode was achieved.