Crystal phase regulation of MnO2 for alcohol oxidation with ultra-stability in acidic solution

Release time:2023-10-19 Hits:

Key Words:Hydrogen productionMnO2OxidationNanoparticlesSurfaces

Abstract:The stability of non-noble metal catalysts for water oxidation is remaining a great challenge in acidic solution. Herein, alcohols oxidation instead of water oxidation coupled with ultradurable H-2 production was realized. The MnO2 crystal phase regulation could optimize the electronic structure, and the delta-MnO2 with more Mn3 showed a higher activity, including a low overpotential of 1.48 V at 50 mA cm(-2,) and a small Tafel slope of 176.22 mV dec(-1.) Moreover, the delta-MnO2 catalyst exhibited extremely high stability after 24 h for EG oxidation, while the activity was quickly lost within 0.5 h for water oxidation. This work indicated that crystal phase regulation could improve the active and stability of acidic water splitting catalysts.

Volume:178

Issue:wu

Translation or Not:no