Preparation of nanoscale LaXO3 (X=Co, Mn, Ni) by rheological phase method for oxygen reduction reaction.
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| Title: | Preparation of nanoscale LaXO3 (X=Co, Mn, Ni) by rheological phase method for oxygen reduction reaction. |
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| Authors: | Wang, Pan1 (AUTHOR), Fu, Ce1 (AUTHOR), Zhan, Wei2 (AUTHOR), Zhang, Rong-Hua1 (AUTHOR) rhzhang@ctgu.edu.cn, Yan, Luo-Yi1 (AUTHOR), Cheng, Zheng1 (AUTHOR), Zhang, Xin1 (AUTHOR), Zhou, Xin-Wen1 (AUTHOR) xwzhou@ctgu.edu.cn |
| Source: | Ceramics International. Jan2023, Vol. 49 Issue 2, p2319-2328. 10p. |
| Subjects: | Metal catalysts, Catalytic activity, Oxygen reduction, Charge exchange, Perovskite, Catalysts |
| Abstract: | The rheological phase method(RPM) is a simple and environmentally friendly synthesis method. In this work, nanoscale LaXO 3 (X = Co, Mn, Ni) series catalysts have been synthesized by RPM and their oxygen reduction reaction (ORR) have been investigated. The optimal calcination temperature of the RPM is lower than that of the solid-phase method, and the catalytic activity of the catalyst is also higher than that of solid-phase method, mainly because the products prepared by RPM have a nanoscale porous structure and a small amount of residual carbon. By comparing the differences among LaCoO 3 , LaMnO 3 , and LaNiO 3 , the results show that the ORR activity of the catalyst is the strongest when the b-site element is Mn, and the calculated electron transfer number is 3.99, which is close to 4 electrons, indicating that the by-product generation is relatively small, and the kinetic current density reach 6.63 mA cm−2. Both were higher than of LaCoO 3 and LaNiO 3. This work is expected to provide a new green synthesis method for non-noble metal catalyst perovskite oxygen reduction catalyst of LaCoO 3 , LaMnO 3 , and LaNiO 3. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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