Many parameters influence the photocatalytic production of H₂. Identifying and quantifying them is necessary for correct comparison of photocatalysts and right understanding of involved mechanism.

In this work, we studied the photocatalytic dehydrogenation of isopropanol with titania-supported ruthenium disulfide. We studied the influence of seven parameters on the photocatalytic activity: the temperature, the composition of the reactive mixture, the mass of the photocatalyst, the flux and the energy of the incident photons, the co-catalyst loading and the nature of the support. Their influence was studied, not only on the rate of hydrogen production (or photon yield) but also on the apparent activation energy and on the pre-exponential factor, deduced from an Arrhenius law.

The photon yield as a function of the co-catalyst loading show an optimum of activity.

A 6.9 % photon yield was obtained at 0.84 wt% and $E_{photons}=3.65eV$.

The rate-determining step for the photocatalytic dehydrogenation of the isopropanol with RuS₂/TiO₂ is, at optimal conditions, the electron transfer from TiO₂ to RuS₂. The latter is not favored because of the band diagrams of RuS₂ and TiO₂. The electron transfer can be optimized working with incident photons having a higher energy, thanks to a hot carrier effect observed in RuS₂/TiO₂.

许多参数影响H ₂的光催化生产。识别和量化它们对于正确比较光催化剂和正确理解相关机制是必要的。

在这项工作中，我们研究了异丙醇与二氧化钛负载的二硫化钌的光催化脱氢。我们研究了七个参数对光催化活性的影响：温度、反应混合物的组成、光催化剂的质量、入射光子的通量和能量、助催化剂负载和载体的性质。研究了它们的影响，不仅对产氢率（或光子产率）而且对表观活化能和指数前因子的影响，从阿伦尼乌斯定律推导出来。

作为助催化剂负载的函数的光子产率显示出最佳活性。

在 0.84 wt% 和 ${乙}_{磷H○吨○n秒}=3.65\mathrm{电子}伏$.

异丙醇与RuS ₂ /TiO ₂光催化脱氢的速率决定步骤是，在最佳条件下，电子从TiO ₂转移到RuS ₂。由于RuS ₂和TiO ₂的能带图，后者不受青睐。由于在 RuS ₂ /TiO _{2 中}观察到的热载流子效应，可以使用具有更高能量的入射光子优化电子转移。