Hydrogen Generation over RuO Nanoparticle-Decorated LaNaTaO Perovskite Photocatalysts Under UV Exposure

The efficacy of LaNaTaO perovskites decoration RuO at diverse contents for the photocatalytic H generation has been explored in this study. The photocatalytic performance of RuO co-catalyst onto mesoporous LaNaTaO was evaluated for H under UV illumination. 3%RuO/LaNaTaO perovskite photocatalyst revealed the highest photocatalytic H generation performance, indicating that RuO nanoparticles could promote the photocatalytic efficiency of LaNaTaO perovskite significantly. The H evolution rate of 3%RuO/LaNaTaO perovskite is 11.6 and 1.3 times greater than that of bare LaNaTaO perovskite employing either 10% CHOH or pure HO, respectively. Interestingly, the photonic efficiency of 3%RuO/LaNaTaO perovskite was enhanced 10 times than LaNaTaO perovskite in the presence of aqueous CHOH solutions as a hole sacrificial agent. The high separation of charge carriers is interpreted by the efficient hole capture using CHOH, hence leading to greater H generation over RuO/LaNaTaO perovskites. This is attributed to an adjustment position between recombination electron-hole pairs and also the reduction of potential conduction alignment as a result of RuO incorporation. The suggested mechanisms of RuO/LaNaTaO perovskites for H generation employing either CHOH or pure HO were discussed. The photocatalytic performances of the perovskite photocatalyst were elucidated according to the PL intensity and the photocurrent response investigations.