Sarma, Saurav Ch. ; Mishra, Vidyanshu ; Vemuri, Vamseedhara ; Peter, Sebastian C. (2019) "Breaking the O═O Bond": deciphering the role of each element in highly durable CoPd2Se2 toward oxygen reduction reaction ACS Applied Energy Materials, 3 (1). pp. 231-239. ISSN 2574-0962
Full text not available from this repository.
Official URL: https://doi.org/10.1021/acsaem.9b01400
Related URL: http://dx.doi.org/10.1021/acsaem.9b01400
Abstract
In-depth insight into oxygen reduction reaction (ORR) electrocatalyst with high figures of merit (activity, stability, and selectivity) is highly crucial to rationally design electrocatalyst with a potential to replace state-of-the-art Pt/C. This work reports the synthesis of CoPd2Se2 nanoparticles that show remarkably high stability of 50000 electrochemical cycles toward ORR. Morphology of the particles is characterized using SEM and TEM microscopy techniques and simulated using Bravais–Friedel–Donay–Harker (BFDH) morphology calculation method. A deconvoluted approach was used to understand the role of each element in the compound. DFT calculation was performed to have an in-depth analysis of the active site. Co and Pd provided an active site for the O2 adsorption and Pd dissociates the O═O bond. The back-donation of substantial electron density to the π* antibonding orbital of the molecule expedites the 4e- reduction of O2 throughout the entire potential range. During the electrochemical stability test, Se forms a protective layer and prevents the active Co and Pd sites from OH poisoning.
Item Type: | Article |
---|---|
Source: | Copyright of this article belongs to American Chemical Society. |
ID Code: | 138945 |
Deposited On: | 21 Aug 2025 05:14 |
Last Modified: | 21 Aug 2025 05:14 |
Repository Staff Only: item control page