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Enhancing Bifunctional Electrocatalytic Activities of La0.5Sr0.5Co0.2Fe0.8O3 in Reversible Single-Component Cells
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2022-09-08 , DOI: 10.1021/acs.iecr.2c02282
Ping Li 1, 2 , Fei Liu 2 , Wei Wei 2 , Beibei Yang 2 , Xinyu Ma 2 , Fei Yan 1, 2 , Tian Gan 3 , Dong Fu 1, 2
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2022-09-08 , DOI: 10.1021/acs.iecr.2c02282
Ping Li 1, 2 , Fei Liu 2 , Wei Wei 2 , Beibei Yang 2 , Xinyu Ma 2 , Fei Yan 1, 2 , Tian Gan 3 , Dong Fu 1, 2
Affiliation
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Perovskite La0.5Sr0.5Co0.2Fe0.8O3 (LSCF) usually acts as both cathode and anode in a reversible solid oxide cell (RSOC). It is found that the traditional preparation method can be improved to reduce the particle size, increase the specific surface area, and enhance the oxygen vacancy concentration of LSCF, further improving its bifunctional electrocatalytic activity toward oxygen reduction reaction (ORR) and hydrogen oxidation reaction (HOR). Compared with that of LSCF prepared by the traditional solid-state reaction method, the oxygen vacancy concentration of LSCF prepared by the hard-template method is increased. Moreover, the LSCF prepared by the hard-template method shows better catalytic activity for HOR and ORR. In addition, the rate-determining steps for HOR and ORR on the surface of LSCF prepared by the hard-template method are the charge transfer reaction and the reduction of oxygen atoms to O–, respectively. Furthermore, a single-component fuel cell and a reversible single-component cell composed of LSCF prepared by the hard-template method exhibit better performance for discharge and water electrolysis.
中文翻译：
增强 La0.5Sr0.5Co0.2Fe0.8O3 在可逆单组分电池中的双功能电催化活性
钙钛矿 La 0.5 Sr 0.5 Co 0.2 Fe 0.8 O 3(LSCF) 通常充当可逆固体氧化物电池 (RSOC) 中的阴极和阳极。研究发现，通过改进传统的制备方法，可以减小LSCF的粒径，增加比表面积，提高LSCF的氧空位浓度，进一步提高其对氧还原反应（ORR）和氢氧化反应的双功能电催化活性。霍尔）。与传统固相反应法制备的LSCF相比，硬模板法制备的LSCF的氧空位浓度有所提高。此外，硬模板法制备的LSCF对HOR和ORR表现出更好的催化活性。此外，–，分别。此外，由硬模板法制备的 LSCF 组成的单组分燃料电池和可逆单组分电池在放电和水电解方面表现出更好的性能。
更新日期：2022-09-08
中文翻译：
增强 La0.5Sr0.5Co0.2Fe0.8O3 在可逆单组分电池中的双功能电催化活性
钙钛矿 La 0.5 Sr 0.5 Co 0.2 Fe 0.8 O 3(LSCF) 通常充当可逆固体氧化物电池 (RSOC) 中的阴极和阳极。研究发现，通过改进传统的制备方法，可以减小LSCF的粒径，增加比表面积，提高LSCF的氧空位浓度，进一步提高其对氧还原反应（ORR）和氢氧化反应的双功能电催化活性。霍尔）。与传统固相反应法制备的LSCF相比，硬模板法制备的LSCF的氧空位浓度有所提高。此外，硬模板法制备的LSCF对HOR和ORR表现出更好的催化活性。此外，–，分别。此外，由硬模板法制备的 LSCF 组成的单组分燃料电池和可逆单组分电池在放电和水电解方面表现出更好的性能。
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