| Title | Unveiling the water-resistant mechanism of Cu(I)-O-Co interfaces for catalytic oxidation |
| Authors | Zhao, Shuaiqi Wu, Peng Lin, Jiajin Li, Yifei Li, Anqi Jin, Xiaojing Chen, Yu Zhao, Bote Zhao, Yun Chen, Guangxu Qiu, Yongcai Ye, Daiqi Yang, Shihe |
| Affiliation | South China Univ Technol, Sch Environm & Energy, Guangdong Prov Key Lab Atmospher Environm & Pollu, Guangzhou 510006, Peoples R China South China Univ Technol, State Key Lab Luminescent Mat & Devices, Guangzhou, Peoples R China Peking Univ, Sch Chem Biol & Biotechnol, Guangdong Key Lab Nanomicro Mat Res, Shenzhen Grad Sch, Shenzhen 518055, Peoples R China |
| Keywords | LOW-TEMPERATURE OXIDATION CO OXIDATION CARBON-MONOXIDE ACTIVE OXYGEN CO3O4 OXIDE ACTIVATION SURFACE CERIA SITES |
| Issue Date | 1-Feb-2022 |
| Publisher | CHEMICAL ENGINEERING JOURNAL |
| Abstract | The development of low-temperature and water-resistant heterogeneous catalysts without noble metals is vital in the effective treatment of atmospheric pollutants in practical application. Herein, we report that Cu(I)-O-Co interfaces of ultrafine CuOx on Co3O4 prepared by co-precipitation exhibit promising low-temperature activity and good water resistance. Experiment results together with density functional theory (DFT) calculations not only verify that Cu+ species are stabilized over Cu(I)-O-Co interfaces because of the strong interaction between Cu2O1 and Co3O4, but also demonstrate that the Cu(I)-O-Co interface facilitates oxygen species activation for promoting catalytic oxidation and reduces the accumulation of hydroxyl and bicarbonate species on the surface of CuOx/Co3O4. DFT calculations also reveal that the CO oxidation rate-limiting step via the dissociation pathway under dry conditions is the Co-OO-Cu species dissociation while the CO coupling with the adsorbed O2 becomes the rate determining step for CO oxidation through the direct pathway over Cu(I)-O-Co interface under humid conditions. Further, the CuOx/Co3O4 catalyst also exhibits superior and stable catalytic activity for toluene oxidation, comparable with partial supported noble metal catalysts (T90 = 190 degrees C). The present work gives a useful strategy for the rational design of low-temperature and water-resistant non-precious-based catalysts to be applicable in CO and toluene removal in practical applications. |
| URI | http://hdl.handle.net/20.500.11897/632175 |
| ISSN | 1385-8947 |
| DOI | 10.1016/j.cej.2021.132219 |
| Indexed | SCI(E) |
| Appears in Collections: | 化学生物学与生物技术学院 å å¦ä¸ å å å·¥ç¨ å¦é ¢ |
