Constructing Efficient CuAg Nanoalloys on Ce 0.90 In 0.10 O δ for Methanol Deep Oxidation Catalysis at Low Temperature.

So far, it is still extremely challenging to develop an efficient catalyst for deep oxidation of methanol at low temperature. Herein, we report the construction of the highly dispersed CuAg alloy on the surface of Ce 0.90 In 0.10 O δ nanorods support for catalyzing methanol deep oxidation. The composition, structure and properties of catalysts were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), ultraviolet-visible (UV-vis) spectroscopy and X-ray photoelectron spectroscopy (XPS). The results show that the Cu x Ag 100-x /Ce 0.90 In 0.10 O δ alloy catalysts exhibit superior catalytic activity and stability compared to pure Ag/Ce 0.90 I n0.10 O δ , with the highest activity observed for Cu 40 Ag 60 /Ce 0.90 In 0.10 O δ , accompanied by the light-off temperature (T 50 ) and full conversion temperature (T 90 ) of 115 and 145 °C, respectively. This is attributed to the synergistic effect of CuAg alloy, which results in electron transfer, generating more Ag 0 , and enhanced interaction between CuAg alloy and the support, leading to increased Ce 3+ content and higher oxygen vacancy concentration. This work successfully applies CuAg alloy catalysts in thermo-catalytic reaction, offering promising prospects for CuAg alloy catalysts in the methanol deep oxidation.