Highly Active Lanthanum Perovskite Electrocatalysts (LaMnxCo1-xO3 (0 ≤ x ≤ 1)) by Tuning the Mn:Co Ratio for ORR and MOR in Alkaline Medium
| Author | Shafath, Sadiyah |
| Author | Logade, Khulood |
| Author | Ashok, Anchu |
| Author | Kumar, Anand |
| Author | Abu-Reesh, Ibrahim M. |
| Available date | 2022-12-28T06:09:27Z |
| Publication Date | 2023-01-01 |
| Publication Name | Electrocatalysis |
| Identifier | http://dx.doi.org/10.1007/s12678-022-00772-0 |
| Citation | Shafath, S., Logade, K., Ashok, A., Kumar, A., & Abu-Reesh, I. M. (2022). Highly Active Lanthanum Perovskite Electrocatalysts (LaMnxCo1-xO3 (0≤ x≤ 1)) by Tuning the Mn: Co Ratio for ORR and MOR in Alkaline Medium. Electrocatalysis, 1-13. |
| ISSN | 18682529 |
| Abstract | Lanthanum-based perovskites (LaMnxCo1-xO3 (0 ≤ x ≤ 1)) were synthesized using a solution combustion synthesis technique with variable ratios of Co and Mn to investigate the surface property and electrocatalytic characteristics (stability and activity of catalyst) for methanol oxidation reaction (MOR), oxygen reduction reaction (ORR), and oxygen evolution reaction (OER) under alkaline medium (KOH). The structural, chemical, and morphological characterizations of the synthesized catalyst were performed by XRD, FTIR, SEM, TEM, and XPS techniques as a function of the Mn:Co elemental ratio. The time–temperature profile during the combustion process was also monitored to study the completion of the combustion reaction and to understand its impact on the structure of the perovskites. SEM/EDX and XPS analysis confirmed the formation of the targeted ratio of Mn and Co on the catalyst. Cyclic voltammetry (CV) and linear sweep voltammetry (LSV) results revealed that all perovskite samples with different Co:Mn ratios were active for ORR, OER, and MOR. The LaMnxCo1-xO3 perovskite with x = 0.4 showed the highest current density compared to the other samples toward all the electrocatalytic reactions under alkaline reaction conditions. Graphical Abstract: [Figure not available: see fulltext.] |
| Sponsor | This work was made possible by the NPRP grant (NPRP13S-0109-200029) and UREP grant (UREP24-001-2-001) from the Qatar National Research Fund (a member of Qatar Foundation). The statements made herein are solely the responsibility of the authors. The authors also acknowledge the Center for Advanced Materials (CAM), Gas Processing Center (GPC), and the Central Laboratory Unit (CLU) at Qatar University for providing services related to XRD, XPS, and electron microscopy analysis. The authors would also like to thank QEERI Core Labs for the TEM characterization. |
| Language | en |
| Publisher | Springer |
| Subject | Electrocatalysts Lanthanum perovskites Methanol oxidation Oxygen evolution reaction Oxygen reduction reaction Solution combustion synthesis |
| Type | Article |
| Pagination | 1-13 |
| Issue Number | 1 |
| Volume Number | 14 |
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