Ce0.8Sr0.2CoxFe1‐xO3‐δ (x=0.2, 0.5, 0.8) – A Perovskite‐type Nanocomposite for Application in the Oxygen Evolution Reaction in Alkaline Media,Electroanalysis

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Ce0.8Sr0.2CoxFe1‐xO3‐δ (x=0.2, 0.5, 0.8) – A Perovskite‐type Nanocomposite for Application in the Oxygen Evolution Reaction in Alkaline Media
Electroanalysis ( IF 2.7 ) Pub Date : 2020-10-21 , DOI: 10.1002/elan.202060370
C. B. Njoku ₁ , B. P. Doyle ₂ , E. Carleschi ₂ , R. J. Kriek ₁

Affiliation

Three perovskite‐type nanocomposites, i. e. Ce_0.8Sr_0.2Co_xFe_1‐xO_3‐δ (x=0.2, CSCF1; 0.5, CSCF2; 0.8, CSCF3), were synthesized employing the sol‐gel technique, subsequent to which they were physically and electrochemically evaluated for their electrocatalytic activity towards the oxygen evolution reaction (OER) in alkaline medium (0.1 M KOH) at room temperature (25 °C). Electrochemical characterisation revealed Ce_0.8Sr_0.2Co_0.8Fe_0.2O_3‐δ (CSCF3) to be the most active having the lowest overpotential at 10 mA cm⁻² (440 mV), the lowest Tafel slope (40.7 mV dec⁻¹), the highest mass activity (20.11 mA mg⁻¹) and highest specific activity (2.22 mA cm⁻²).

中文翻译：

Ce0.8Sr0.2CoxFe1-xO3-δ（x = 0.2，0.5，0.8）–钙钛矿型纳米复合材料，用于碱性介质中的氧释放反应

三种钙钛矿型纳米复合材料，即 e。Ce _0.8 Sr _0.2 Co _x Fe _1-x O _3−δ（x = 0.2，CSCF1; 0.5，CSCF2; 0.8，CSCF3）是通过溶胶-凝胶技术合成的，然后对其进行物理和电化学评估在室温（25°C）下在碱性介质（0.1 M KOH）中对氧释放反应（OER）的电催化活性。电化学表征显示Ce _0.8 Sr _0.2 Co _0.8 Fe _0.2 O3 _-δ（CSCF3）是最活泼的，在10 mA cm ^-2（440 mV）下具有最低的过电势，最低的Tafel斜率（dec.40.7 mV）^-1），最高质量活度（20.11 mA mg ^-1）和最高比活度（2.22 mA cm ^-2）。

更新日期：2020-12-01

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