An environmentally benign WO₃ wrapped cubic CeO₂ core–shell catalyst (Ce@W) was developed for the selective catalytic reduction of NO_x with NH₃. Compared with CeW particles prepared via the conventional co-precipitation method, this core–shell catalyst not only displays higher tolerance to SO₂ and H₂O, but also exhibits a wider activity temperature window of 250–450 °C, in which NO_x conversion and N₂ selectivity reaches 100%. The improved performance of Ce@W catalysts can be contributed to the strong interactions between CeO₂ (100) and WO₃, which generates more Ce³⁺ and surface chemisorbed oxygen. In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTs) reveal that the more thermally stable Brønsted acid sites on Ce@W lead to its excellent high-temperature activity.

开发了一种环境友好的 WO ₃包裹立方 CeO ₂核壳催化剂 (Ce@W)，用于用 NH _{3选择性催化还原 NO x}。与传统共沉淀法制备的CeW颗粒相比，该核壳催化剂不仅对SO ₂和H ₂ O具有更高的耐受性，而且具有更宽的250-450 ℃的活性温度窗口，其中NO _x转化率和N ₂选择性达到100%。Ce@W 催化剂性能的提高可归因于 CeO ₂ (100) 和 WO ₃之间的强相互作用，从而产生更多的 Ce ³⁺和表面化学吸附氧。原位漫反射红外傅里叶变换光谱 (DRIFT) 表明，Ce@W 上热稳定性更高的布朗斯台德酸位点使其具有出色的高温活性。