Abstract Hydroxyl groups are considered as anchoring sites for active components on catalysts. Guided by this viewpoint, 4 wt. % Ag/Al 2 O 3 catalyst derived from Boehmite (AlOOH) was prepared and showed 100% formaldehyde conversion to CO 2 at 75 °C. The results of 1 H MAS NMR, UV–vis spectra and Transmission electron microscopy (TEM) images suggest that the abundant bridging OH groups are prominently contributed to Ag anchoring and the formation of large content of small sized metallic Ag with high dispersion and Ag n δ+ cluster, and thus facilitating the catalytic oxidation of formaldehyde. This work will pave an attractive way for Ag/Al 2 O 3 catalysts design and application. Graphic abstract The enrichment of bridging OH groups of AlOOH contributes to high dispersion of Ag particles and the formation of large content of small sized metallic Ag and Ag n δ+ cluster, thus facilitating the HCHO catalytic oxidation.

中文翻译：

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羟基促进 Ag 分散和 Ag/Al2O3 催化剂在 HCHO 氧化中的优异性能

摘要 羟基被认为是催化剂活性组分的锚定位点。在这个观点的指导下，4 wt。制备了衍生自勃姆石 (AlOOH) 的 % Ag/Al 2 O 3 催化剂，并在 75°C 下显示出 100% 的甲醛转化为 CO 2。1 H MAS NMR、UV-vis 光谱和透射电子显微镜 (TEM) 图像的结果表明，丰富的桥连 OH 基团对 Ag 锚定和形成大量具有高分散性和 Ag n 的小尺寸金属 Ag 有显着贡献δ+ 簇，从而促进甲醛的催化氧化。这项工作将为Ag/Al 2 O 3 催化剂的设计和应用铺平道路。