Gold nanopaticles (AuNPs) supported on metal-doped α-MnO₂ (M-OMS, M = Na, Mg, Al, Fe, Cu, Zn) have been designed for gas-phase selective oxidation of ethanol. Gold loading by colloidal deposition (CD) and deposition precipitation (DP) methods were employed to prepare Au/M-OMS catalysts, and Au/M-OMS-CD showed better gold dispersion and catalytic stability. Au/Cu-OMS-CD achieved the highest acetaldehyde yield (80%) and space-time-yield (3.0 g g_cat⁻¹ h⁻¹) at 200 °C, which are higher than previously reported gold catalysts. Such good performance was ascribed to the moderate surface reduction caused by the CD method and the copper-promoted metal-support synergy between AuNPs and Cu-OMS.

设计了负载在金属掺杂的α - MnO ₂（M-OMS，M = Na，Mg，Al，Fe，Cu，Zn）上的金纳米颗粒（AuNPs），用于乙醇的气相选择性氧化。采用胶体沉积（CD）和沉积沉淀（DP）法载金制备Au / M-OMS催化剂，Au / M-OMS-CD具有较好的金分散性和催化稳定性。Au / Cu-OMS-CD在200°C时可获得最高的乙醛产率（80％）和时空产率（3.0 gg _cat ^-1  h ^-1），高于先前报道的金催化剂。这种良好的性能归因于CD方法引起的适度表面还原以及AuNP和Cu-OMS之间的铜促进的金属-载体协同作用。