Fe(2)O(3) enhanced high-temperature arsenic resistance of CeO(2)–La(2)O(3)/TiO(2) catalyst for selective catalytic reduction of NO(x) with NH(3)

High-temperature arsenic resistance catalysts of CeLa(0.5)Fe(x)/Ti (x = 0, 0.1, 0.2, 0.3, 0.4, 0.5) series were prepared and measured under a simulation condition of arsenic poisoning. The as-prepared catalysts were characterized by XRD, SEM, TEM, and XPS. The specific surface area and pore size of the catalysts were measured. At x = 0.2, the catalyst shows the best arsenic resistance and catalytic performance. The active temperature range of the CeLa(0.5)Fe(0.2)/Ti catalyst is 345–520 °C when the gas hourly space velocity is up to 225 000 mL g(−1) h(−1). Compared with commercial vanadium-based catalysts, CeLa(0.5)Fe(0.2)/Ti shows much better catalytic performance. The introduction of Fe will improve the dispersion of CeO(2) and increase the concentration of Ce(3+) and unsaturated active oxygen on the surface. The NH(3)-TPD and H(2)-TPR results show that the CeLa(0.5)Fe(0.2)/Ti catalyst has more acidic sites and more excellent redox performance than CeLa(0.5)Fe(0)/Ti. The CeLa(0.5)Fe(0.2)/Ti catalyst might have application prospects in the field of selective catalytic reduction of NO(x) with NH(3).