Revealing opposite behaviors of catalyst for VOCs Oxidation: Modulating electronic structure of Pt nanoparticles by Mn doping

Revealing the role of Pt electronic structure in the catalytic degradation of VOCs is of great significance for developing efficient catalysts. Herein, the catalytic oxidation of acetone and benzene on the ZSM-5 confined Pt -based catalyst (Pt@Z) was investigated. Surprisingly, after introducing Mn to Pt@Z, the activity of the PtMn@Z catalyst for acetone was significantly increased, while the activity for benzene was decreased. It was found that Mn introduction led to electron transfer to Pt, which enhanced the adsorption of acetone and gaseous oxygen, and promoted acetone degradation. However, the high electron density of Pt inhibited the adsorption and degradation of benzene. Importantly, we used this phenomenon to regulate the electronic structure of Pt by simply adjusting the amount of Mn and achieving the synergistic removal of benzene and acetone. Therefore, this work provided an idea for the design of highly efficient catalytic materials with mixed VOCs.

Automated summary

The catalytic oxidation of acetone and benzene on Pt@Z catalysts was studied. It was found that introducing Mn to Pt@Z significantly increased the activity for acetone while decreasing the activity for benzene. This was attributed to the electron transfer from Mn to Pt, enhancing the adsorption of acetone and gaseous oxygen but inhibiting the adsorption and degradation of benzene. The electronic structure of Pt could be regulated by adjusting the amount of Mn, enabling the synergistic removal of benzene and acetone.