PdAu Nanoparticles Supported on CeO2 Hybridized Hollow Mesoporous Carbon Spheres With Low Temperature Oxidation for Formic Acid Dehydrogenation

In this study, PdAu nanoparticles anchored on CeO 2 hybridized hollow mesoporous carbon sphere (PdAu-CeO 2 /OHCS) has been fabricated by nanocasting, low temperature oxidation, and wet chemistry approach. As-prepared PdAu-CeO 2 /OHCS catalyst exhibits excellent catalytic activity for the formic acid dehydrogenation (FAD) without additives, showing a high initial turnover frequency (TOF) of 4104 h −1 at 298 K and initial superior TOF of 15988 h −1 at 323 K. This outstanding catalytic activity can be attributed to the fact that low-temperature oxidation can enhance the hydrophilicity of HCS and increase abundant oxygen-containing functional groups, facilitating the formation and uniform distribution of smaller PdAu nanoparticles. Moreover, the introduction of CeO 2 hybridizes with OHCS, which further modulates the electron structure of the catalyst, thus further promoting the activity of FAD. This work provides a feasible idea into fabricating efficient heterogeneous catalysts for FAD. Graphical PdAu nanoparticle anchored on CeO 2 hybridized hollow mesoporous carbon sphere has been fabricated by nanocasting, low temperature oxidation, and wet chemistry approach. As-prepared catalyst exhibits excellent catalytic activity for formic acid dehydrogenation, showing a high initial turnover frequency (TOF) of 15988 h −1 at 323 K.