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Meliorating perovskite-related Pr 1.5 Ba 1.5 Cu 3 O 7 cathode with Mn-doping for proton-conducting solid oxide fuel cells
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| 【文章作者】Du, Kunpeng;Hou, Jie |
| 【文章摘要】 The limited availability of cathode materials exhibiting superior activity and durability has impeded the extensive utilization of proton-conducting solid oxide fuel cells (H-SOFCs). Pr1.5Ba1.5Cu3O7 (PBC), cross-stacking by PrxBa1-xCuOy perovskite layer sandwiched in two CuO5 pyramids with PrOy layer, could potentially enhance electrocatalytic performance owing to the integration of different structural, chemical and electronic properties. Herein, the PBC cathode exhibits excellent cell performance in H-SOFC with a power output of 1214 mW cm(-2) at 700 degrees C, outperforming Co-based and Cu-based single-phase cathodes reported in the literature. Furthermore, the Mn dopant is attempted to meliorate PBC, thus obtaining Pr1.5Ba1.5Cu2.6Mn0.4O7-delta (PBCM04). Surprisingly, four-phase dissociation reaction occurred, and the resultants are Pr1.5Ba1.5Cu2.8Mn0.2O7-delta (PBCM02), Pr6O11, Mn2O3 and Pr0.8Ba1.2MnO4 (PBM). Then mixed-phase PBCM04 cathode-based cell exhibits enhanced performance with a power output of 1461 mW cm(-2) at 700 degrees C, attributing to mixed phases with more oxygen vacancies favouring the oxygen reduction reaction (ORR). On balance, the excellent electrochemical properties and fine operational stability for both cells demonstrate that PBC and PBCM04 are preferable H-SOFC cathode alternatives. The cross-stacking of different structure and phase dissociation reaction derived from doping are beneficial for developing highly active and durable cathodes, which provides new routes for designing new materials in H-SOFC and related electrocatalytic fields. |
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【卷】【ISSUE】【ISSUEID】
【文章期份】2024
【发布日期】2025/5/13 10:04:19
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