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首页> 外文期刊>Electrocatalysis >OER Activity of Ir-Ta-Zr Composite Anode as a Counter Electrode for Electrohydrogenation of Toluene
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OER Activity of Ir-Ta-Zr Composite Anode as a Counter Electrode for Electrohydrogenation of Toluene

机译：Ir-Ta-Zr复合阳极的OER活性作为对甲苯进行甲苯加氢的对电极

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摘要

The organic chemical hydride method using the toluene (TL)/methylcyclohexane (MCH) system is one of the prospective energy carrier technologies for hydrogen storage and transportation. The direct electrohydrogenation of toluene with water decomposition using electric power is a highly efficient energy conversion process for the MCH synthesis. In this process, an IrO2-based directionally stable electrodeA (R) (DSEA (R)) for the oxygen evolution reaction (OER) is used as the anode because of its good electrocatalytic activity and durability. However, further improvement in the activity is needed for practical applications. In this study, the effect of Zr addition substituted for Ta in IrO2-Ta2O5/Ti, which is a typical OER anode, on the electrocatalytic activity has been investigated in sulfuric acid with TL contamination. The activity of both the IrO2-Ta2O5/Ti and the IrO2-Ta2O5-ZrO2/Ti was higher and less affected by TL contamination than the IrO2/Ti. The activity of the IrO2-Ta2O5-ZrO2/Ti increased with the Zr content. The Zr addition increased the real surface area along with the increase in the double layer capacitance; on the other hand, the increase in activity was more than that of the surface area. Therefore, the Zr additive would affect not only the real surface area increase, but also the electrocatalytic activity.
机译：使用甲苯（TL）/甲基环己烷（MCH）系统的有机化学氢化物方法是用于储氢和运输氢的潜在能量载体技术之一。使用电力将甲苯直接电氢化并进行水分解是用于MCH合成的高效能量转化过程。在该过程中，由于用于氧析出反应（OER）的基于IrO2的方向稳定电极A（R）（DSEA（R））被用作阳极，因为它具有良好的电催化活性和耐久性。但是，对于实际应用，需要进一步提高活性。在这项研究中，已经研究了在典型的OER阳极IrO2-Ta2O5 / Ti中添加Zr替代Ta对电催化活性的影响，该硫酸具有TL污染。与IrO2 / Ti相比，IrO2-Ta2O5 / Ti和IrO2-Ta2O5-ZrO2 / Ti的活性较高，并且受TL污染的影响较小。 IrO2-Ta2O5-ZrO2 / Ti的活性随Zr含量的增加而增加。 Zr的添加随着双层电容的增加而增加了实际表面积。另一方面，活性的增加大于表面积的增加。因此，Zr添加剂不仅会影响实际表面积的增加，而且会影响电催化活性。

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