A facile and solvent-free route has been developed to rapidly synthesize CuO-CeO₂ catalysts within 30 min. The effect of calcination temperature on catalytic performances is more significant than Cu loading, and the optimal calcination temperature and Cu loading are 700 °C and 7.5 wt.%, respectively. The optimal catalyst 7.5CuCe-SF-700 exhibits the highest CO conversion and the corresponding temperature window for full CO conversion is as wide as 50 °C. According to the characterization results of XRD, N₂ adsorption-desorption, H₂-TPR, TEM, HR-TEM, STEM, EDS, Raman and XPS, it can be concluded that the high-performances of CuO-CeO₂ catalyst should be attributed to synergistic effects of high dispersion Cu species and CeO₂, and the presence of more reduced copper species as the active site in the catalyst. 7.5CuCe-SF-700 exhibits excellent stability for CO-PROX during the 200 time-on-stream test under actual reaction conditions (with 15% CO₂ and 10% H₂O). In addition, surfactant template, urea gelation/co-precipitation and sol-gel methods were used to synthesize CuO-CeO₂ catalysts so as to compare them with 7.5CuCe-SF-700, and the results exhibit not only 7.5CuCe-SF-700 is superior to the former three catalysts but also our synthesis route is more simple, controllable, solvent-free, time-saving and energy-saving.

已经开发了一种简便且无溶剂的方法来在30分钟内快速合成CuO-CeO ₂催化剂。煅烧温度对催化性能的影响比负载铜更为显着，最佳煅烧温度和负载铜分别为700°C和7.5 wt。％。最佳催化剂7.5CuCe-SF-700表现出最高的CO转化率，而完全CO转化的相应温度范围高达50°C。根据XRD，N ₂吸附-解吸，H ₂ -TPR，TEM，HR-TEM，STEM，EDS，Raman和XPS的表征结果，可以得出CuO-CeO ₂催化剂应具有较高的性能。归因于高分散性铜和CeO的协同作用_{如图2所示}，并且存在更多还原的铜物质作为催化剂中的活性位点。7.5CuCe-SF-700在实际反应条件下（含15％CO ₂和10％H ₂ O）在200个运行时间测试中对CO-PROX表现出出色的稳定性。此外，使用表面活性剂模板，尿素凝胶化/共沉淀和溶胶-凝胶法合成了CuO-CeO ₂催化剂，以便与7.5CuCe-SF-700进行比较，结果不仅显示出7.5CuCe-SF-700。 700优于前三种催化剂，而且我们的合成路线更简单，可控，无溶剂，省时和节能。