Abstract Glucose solar light photoinduced oxidation on Bi2WO6 and the chemical kinetics conditions for concurrent photoelectrochemical H2 production are reported. The results show that the conversion of this organic compound is determined by their surface concentration according to the Langmuir-Hinshelwood mechanism. The performance of Bi2WO6 powder for the photocatalytic oxidation of glucose is higher than that observed with TiO2-based materials. Glucose degradation and mineralization rates are similar; therefore, stable intermediates are not formed during glucose oxidation. Photoluminescence studies indicate that glucose promotes electron injection into the valence band of semiconductor. The initial glucose concentration in combination with the electrode potential used, determines the H2 production. In fact, electrode potential of 0.9 V vs. SHE and 60 ppm of glucose defines kobs values equal to kK with maximum H2 evolution rate: 3.05 μmol h−1 cm−2. This value arises from the transformation of the 97% of the Faradaic current measured. The phenomenological conditions for renewable energy applications have been envisaged.

中文翻译：

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Bi2WO6 上的光催化和光电化学葡萄糖氧化：伴随产生 H2 的条件

摘要 报道了葡萄糖太阳光在 Bi2WO6 上的光致氧化和同时光电化学 H2 产生的化学动力学条件。结果表明，根据 Langmuir-Hinshelwood 机制，这种有机化合物的转化率由它们的表面浓度决定。Bi2WO6 粉末对葡萄糖的光催化氧化性能高于使用 TiO2 基材料观察到的性能。葡萄糖降解和矿化率相似；因此，在葡萄糖氧化过程中不会形成稳定的中间体。光致发光研究表明，葡萄糖促进电子注入半导体的价带。初始葡萄糖浓度与所使用的电极电位相结合，决定了 H2 的产生。事实上，电极电位为 0.9 V vs. SHE 和 60 ppm 的葡萄糖定义 kobs 值等于 kK，最大 H2 释放速率：3.05 μmol h-1 cm-2。该值来自测量的法拉第电流的 97% 的转换。已经设想了可再生能源应用的现象学条件。