Effect of Cu-Doped Co–Mn Spinel for Boosting Low-Temperature NO Reduction by CO: Exploring the Structural Properties, Performance, and Mechanisms

• DOI: 10.1021/acsami.2c23120
• Publication Date: 2023-02-24T21:14:55Z
• Authors: Yu Qin; Shiying Fan; Jinsuo Gao; Moses O. Tadé; Shaomin Liu; Xinyong Li
• Keywords: Selective catalytic reduction

Cobalt-manganese spinel catalysts performed unsatisfactory activity at low-temperature and narrow reaction temperature window, which greatly limited the application in NO reduction by CO. Herein, we synthesize a series of Cu-doped CoMn2O4 apply to The Cu0.3Co0.7Mn2O4 exhibited superior catalytic performance, reaching 100% conversion 80% N2 selectivity 250 °C. Detailed structural analysis showed that introduced Cu replaces some Co tetrahedral coordination induce strong synergistic effect between different metals. This endows catalyst with promotion both electron transfer oxygen vacancy generation on surface. Importantly, mechanism pathway were further revealed situ diffusion Fourier transform infrared spectroscopy (DRIFTS) density functional theory (DFT) calculations. results indicated cycle mainly determines Notably, doping significantly lowered energy barrier rate-determining step (*CO + O → *Ov CO2), facilitating desorption CO2 exposing active sites for efficient work offers an effective way designing CO provides reference exploring reaction.