Chromium phosphide CrP as highly active and stable electrocatalysts for oxygen electroreduction in alkaline media
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10.1016/j.apcatb.2019.117846
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/172704
Tipus de documentArticle
Data publicació2019-11-05
Condicions d'accésAccés obert
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Abstract
Catalysts for oxygen reduction reaction (ORR) are key components in emerging energy technologies such as fuel cells and metal-air batteries. Developing low-cost, high performance and stable electrocatalysts is critical for the extensive implementation of these technologies. Herein, we present a procedure to prepare colloidal chromium phosphide CrP nanocrystals and we test their performance as ORR electrocatalyst. CrP-based catalysts exhibited remarkable activities with a limiting current density of 4.94¿mA¿cm-2 at 0.2¿V, a half-potential of 0.65¿V and an onset potential of 0.8¿V at 1600¿rpm, which are comparable to commercial Pt/C. Advantageously, CrP-based catalysts displayed much higher stabilities and higher tolerances to methanol in alkaline solution. Using density functional theory calculations, we demonstrate CrP to provide a very strong chemisorption of O2 that facilitates its reduction and explains the excellent ORR performance experimentally demonstrated.
CitacióLiu, J. [et al.]. Chromium phosphide CrP as highly active and stable electrocatalysts for oxygen electroreduction in alkaline media. "Applied catalysis B. Environmental", 5 Novembre 2019, vol. 256, núm. 117846, p. 117846:1-117846:2.
ISSN0926-3373
Versió de l'editorhttps://www.sciencedirect.com/science/article/pii/S0926337319305922
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