| Title | Insight into the significantly enhanced photocatalytic CO2 reduction performance of Pt/MnOx dual cocatalysts on sea-urchin-like anatase TiO2 microspheres |
| Authors | 肖江蓉 |
| Issue Date | 2021 |
| Publisher | Chemical Engineering Journal |
| Keywords | Anatase TiO2 microsphere CH4 selectivity CO2 reduction reaction Dual cocatalyst Photocatalysis |
| Citation | Chemical Engineering Journal. 2021;425:N.PAG. |
| Abstract | Sea-urchin-like anatase TiO 2 microspheres (AMS) composed by nanorods were prepared. • Pt/MnO x dual cocatalysts were decorated on the nanorods of AMS via photodeposition. • Pt cocatalyst on AMS mainly improve the charge separation and CO 2 RR efficiency. • MnO x on AMS promotes the reactants' adsorption/activation and CH 4 selectivity. • Synergistic effect of dual cocatalysts significantly improves the CO 2 RR performance. Solar-driven CO 2 reduction reaction (CO 2 RR) for producing chemical fuels over semiconductors is considered to be a potential way to ameliorate the global warming and energy shortage. Herein, we report a facile and robust method by co-decorating Pt/MnO x dual cocatalysts on sea-urchin-like anatase TiO 2 microspheres (AMS) to significantly improve the CO 2 RR activity and CH 4 product selectivity. The x Pt- y Mn-AMS composite with optimal contents of dual cocatalysts manifests compelling CO/CH 4 yields of 16.5/125.3 μmol g−1h−1 with a total photoactivity of 1035.4 μmol g−1h−1, 13 times higher than that of AMS alone. The Pt nanoparticles on AMS mainly improve the photoexcited charge separation and CO 2 RR efficiency, while the MnO x cocatalyst mainly promotes the adsorption/activation of reactants and the CH 4 product selectivity by varying the surface chemistry. The synergistic effect of dual cocatalysts on AMS renders the significantly improved CO 2 RR performance, and thus provides a simple yet general strategy for fabricating high-performing CO 2 RR TiO 2 -based photocatalyst. |
| Appears in Collections: | 环境生物与水工程系 |
Original Search
