[Fe(CN)(6)] vacancy-boosting oxygen evolution activity of Co-based Prussian blue analogues for hybrid sodium-air battery
文献类型：期刊论文
| 作者 | Kang, Y.; Wang, S.; Hui, K. S.; Li, H-F; Liang, F.; Wu, X-L; Zhang, Q.; Zhou, W.; Chen, L.; Chen, F. |
| 刊名 | MATERIALS TODAY ENERGY
 |
| 出版日期 | 2021 |
| 卷号 | 20 |
| 关键词 | D-BAND CENTER WATER OXIDATION REDUCTION REACTION ELECTROCATALYSTS PLATINUM CATALYST |
| 英文摘要 | Prussian blue analogues (PBAs) have emerged as efficient catalysts for oxygen evolution reaction (OER) due to their porous structure with well-dispersed active sites. However, Co-based PBA (Co-PBA) electrocatalysts are characterized by moderate OER kinetics. In this study, we developed a facile high-yield strategy to fabricate defective Co-PBA (D-Co-PBA) with [Fe(CN)(6)] vacancies and exposed Co (III) active sites by post-oxidation treatment of the pristine Co-PBA with aqueous H2O2. Rietveld refinement results show that the lattice parameter (a) and unit-cell volume (V) of D-Co-PBA are smaller than those of the pristine Co-PBA, thereby confirming the generation of [Fe(CN)(6)] vacancies. Density functional theory calculations reveal that the [Fe(CN)(6)] vacancy can effectively regulate the electronic structure of D-CoPBA; this condition reduces the reaction barrier of the rate-determining step toward OER. In OER, the DCo-PBA catalyst achieves a lower overpotential of 400 mV at a current density of 10 mA cm(2), which is superior to that of Ir/C (430 mV) and Co-PBA (450 mV). A hybrid sodium-air battery assembled with Pt/C and D-Co-PBA catalysts displays a discharge voltage of 2.75 V, an ultralow charging-discharging gap of 0.15 V, and a round-trip efficiency of 94.83% on the 1000th cycle at the current density of 0.01 mA cm(-2). This study is highly promising for large-scale production of affordable and effective PBA-based materials with desirable OER activity for metal-air batteries and water-alkali electrolyzers, thus helping achieve the goal of sustainability. (C) 2020 Elsevier Ltd. All rights reserved. |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/21853]  |
| 专题 | 中国科学院宁波材料技术与工程研究所 2021专题_期刊论文 |
| 作者单位 | 1.Hui, KS (corresponding author), Univ East Anglia, Fac Sci, Engn, Norwich NR4 7TJ, Norfolk, England. 2.Chen, F (corresponding author), South China Normal Univ, Sch Phys & Telecommun Engn, Guangdong Prov Key Lab Quantum Engn & Quantum Mat, Guangzhou 510006, Peoples R China. 3.Hui, KN (corresponding author), Univ Macau, Inst Appl Phys & Mat Engn, Minist Educ, Joint Key Lab, Ave Univ, Taipa 999078, Macau, Peoples R China. 4.Chen, L (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Kang, Y.,Wang, S.,Hui, K. S.,et al. [Fe(CN)(6)] vacancy-boosting oxygen evolution activity of Co-based Prussian blue analogues for hybrid sodium-air battery[J]. MATERIALS TODAY ENERGY,2021,20. |
| APA | Kang, Y..,Wang, S..,Hui, K. S..,Li, H-F.,Liang, F..,...&Hui, K. N..(2021).[Fe(CN)(6)] vacancy-boosting oxygen evolution activity of Co-based Prussian blue analogues for hybrid sodium-air battery.MATERIALS TODAY ENERGY,20. |
| MLA | Kang, Y.,et al."[Fe(CN)(6)] vacancy-boosting oxygen evolution activity of Co-based Prussian blue analogues for hybrid sodium-air battery".MATERIALS TODAY ENERGY 20(2021). |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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