Título:
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Chromium phosphide CrP as highly active and stable electrocatalysts for oxygen electroreduction in alkaline media
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Autor/a:
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Liu, Junfeng; Yu, Xiaoting; Du, Ruifeng; Zhang, Chaoqi; Zhang, Ting; Llorca, Jordi; Arbiol i Cobos, Jordi; Wang, Ying; Meyns, Michaela; Cabot, Andreu
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Abstract:
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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 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 O that facilitates its reduction and explains the excellent ORR performance experimentally demonstrated. |
Fecha de creación:
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13-09-2021 |
Materia(s):
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-Metal phosphide -Colloidal synthesis -Electrocatalysis -Oxygen reduction |
Derechos:
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embargoed access
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https://creativecommons.org/licenses/by-nc-nd/4.0/ |
Tipo de documento:
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Article |
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Uri:
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https://ddd.uab.cat/record/218091
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