A series of Co₃O₄–CeO₂ supported Ag catalysts were prepared by different methods and the catalytic properties of these catalysts were investigated for the catalytic removal of formaldehyde (HCHO). The Ag/Co₃O₄–CeO₂–H catalyst calcined in a O₂/N₂ flow and then reduced in a H₂/N₂ stream exhibited excellent catalytic activity, over which 100% HCHO conversion was achieved at a temperature as low as 60 °C. In addition, the Ag/Co₃O₄–CeO₂–H catalyst also displayed high stability in lifetime testing. Based on a variety of physical–chemical characterization results, it is demonstrated that the larger specific area, easier reducibility and abundant active surface oxygen species served as essential roles in the catalytic removal of HCHO for Ag/Co₃O₄–CeO₂–H catalyst.

采用不同方法制备了一系列由Co ₃ O ₄ -CeO ₂负载的Ag催化剂，并研究了这些催化剂对甲醛（HCHO）的催化去除性能。在O ₂ / N ₂流中煅烧然后在H ₂ / N ₂流中还原的Ag / Co ₃ O ₄ -CeO ₂ -H催化剂表现出优异的催化活性，在₂₀₀ ℃的温度下可实现100％HCHO转化最低至60°C。另外，Ag / Co ₃ O ₄ -CeO ₂-H催化剂在寿命测试中也显示出高稳定性。根据各种物理化学表征结果，证明了较大的比表面积，更易还原性和丰富的活性表面氧物种是催化去除Ag / Co ₃ O ₄ -CeO ₂ -H的HCHO的重要作用。催化剂。