The development of environmental benign catalysts is the focus on the selective catalytic reduction (SCR) of NO_x. In this study, a series of SnO₂-modified MoO₃ nanobelts were fabricated by simple impregnation method and applied in the SCR reaction of NO with NH₃. On these samples, the SnO₂ component disperses evenly on the surface of MoO₃ nanobelts, and some synergistic effect exists between the SnO₂ component and the MoO₃ support. When the content of the loaded SnO₂ was 10 wt%, the obtained 10SnO₂/MoO₃ catalyst exhibits superior catalytic performance in the SCR reaction. Notably, the SnO₂/MoO₃ catalysts possess great resistance for SO₂ and H₂O in the reaction as well. The modification of SnO₂ could significantly promote the redox property, increase the surface acid sites and the surface chemisorbed oxygen species of the catalysts, which were key factor for the good NH₃-SCR catalytic performance of the SnO₂/MoO₃ catalysts.

Graphic Abstract

The SnO₂-modifation could improve the acid sites and redox property of the MoO₃, thus enhancing its catalytic performance in the NH₃-SCR reaction of NO.

中文翻译：

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SnO 2改性对MoO 3纳米带催化NH 3 -SCR反应的催化性能的提高：酸度和氧化还原性能的提高

环境友好型催化剂的开发是NO _x选择性催化还原（SCR）的重点。本研究通过简单的浸渍法制备了一系列SnO ₂修饰的MoO ₃纳米带，并将其应用于NO与NH ₃的SCR反应中。在这些样品上，SnO ₂组分均匀地分散在MoO ₃纳米带的表面上，并且在SnO ₂组分和MoO ₃载体之间存在一些协同作用。当负载的SnO ₂的含量为10wt％时，获得的10SnO ₂ / MoO ₃催化剂在SCR反应中显示出优异的催化性能。值得注意的是，SnO ₂ / MoO ₃催化剂在反应中对SO ₂和H ₂ O也具有很大的抵抗力。SnO ₂的改性可以显着提高催化剂的氧化还原性能，增加催化剂的表面酸位和表面化学吸附的氧种类，这是SnO ₂ / MoO ₃催化剂良好的NH ₃ -SCR催化性能的关键因素。

图形摘要

SnO _2的改性可以改善MoO ₃的酸位和氧化还原性能，从而增强其在NO的NH ₃ -SCR反应中的催化性能。