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Study of 2-Propanol, 1-Propanol, and Acetone Electrochemical Oxidation on Pt in Gelled Phosphoric Acid at 170 degrees C

机译:2-丙醇,1-丙醇和丙酮在170°C的磷酸中对Pt的电化学氧化研究

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摘要

Electrochemical oxidation of acetone, 2-propanol, and 1-propanol on Pt was studied by slow scan rate voltammetry at 170 degrees C using fuel cell with the membrane of the H3PO4 doped polybenzimidazole. Reaction rate orders with respect to partial pressures of the aliphatic compounds and water vapors were determined at E=0.5 V and at E=0.9 V, which correspond to low and high surface oxide coverages on Pt. At E=0.5 V close to zero reaction rate orders in respect to vapor pressures of aliphatic reactants were found. At E=0.5 V reaction, rate orders with respect to water vapor pressure were slightly higher than unity in all cases. At E=0.9 V oxidation, reaction rate orders with respect to aliphatic reactant vapor pressure ranged within 0.6-1. Close to zero reaction rate orders with respect to water vapor pressure were found in all cases at E=0.9 V.
机译:丙酮,2-丙醇和1-丙醇在Pt上的电化学氧化是通过使用燃料电池和H3PO4掺杂的聚苯并咪唑膜在170摄氏度下通过慢扫描速率伏安法研究的。相对于脂族化合物和水蒸气的分压的反应速率阶数在E = 0.5V和E = 0.9V下确定,其对应于Pt上的低和高表面氧化物覆盖率。在E = 0.5V下,发现相对于脂族反应物的蒸气压接近零反应速率的阶数。在E = 0.5V反应下,在所有情况下,相对于水蒸气压力的速率阶数均略高于1。在E = 0.9V氧化时,相对于脂族反应物蒸气压的反应速率为0.6-1。在所有情况下,在E = 0.9 V时,发现相对于水蒸气压力接近零的反应速率阶数。

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