Controlling crystal orientation in multilayered heterostructures toward high electro-catalytic activity for oxygen reduction reaction
文献类型：期刊论文
| 作者 | Zheng, Yun; Li, Yifeng; Wu, Tong; Zhao, Chenhuan; Zhang, Wenqiang; Zhu, Jianxin ; Li, Zhanping; Chen, Jing; Wang, Jianchen; Yu, Bo
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| 刊名 | NANO ENERGY
 |
| 出版日期 | 2019-08-01 |
| 卷号 | 62页码:521-529 |
| 关键词 | Crystal orientation Multilayered heterostructures Oxygen reduction reaction (ORR) Intermediate-temperature SOFCs Perovskite electrodes |
| ISSN号 | 2211-2855 |
| 英文摘要 | Nd0.8Sr1.2CoO4 +/- 8 (NSC214)/Nd0.5Sr0.5CoO3-8(NSC113) multilayered heterostructured thin film cathodes of SOFCs exhibit similar to 20 times difference in polarization resistance and catalytic activity toward oxygen reduction reaction (ORR), which are synthesized by pulsed laser deposition under different temperatures. The thin-films grown at 650 degrees C possess consistent crystal orientation, while those grown at 500 degrees C have different crystal orientations between NSC113 and NSC214 layers. As observed, they show similar to 10(2) times and similar to 10(1) times, respectively, higher ORR performance than a single-phase NSC113 thin-film electrode, as characterized by constructing full cell operated at intermediate-temperature. The origin of such performance differences is analyzed on the basis of crystal orientation by HRXRD, HRTEM, HAADF-STEM, TOF-SIMS, and DFT calculation, and the results indicate that the increased crystal orientations can significantly weaken the positive effects of heterointerface. This observation is attributed to the formation of excessive grain boundaries, which leads to increased formation energy of oxygen vacancy and limited oxygen transportation. These results highlight that the precise control of crystal orientation can make full use of heterostructure to enhance the ORR performance of electrochemical devices. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/42634]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 作者单位 | 1.Tsinghua Univ, Collaborat Innovat Ctr Adv Nucl Energy Technol, Inst Nucl & New Energy Technol INET, Beijing 100084, Peoples R China 2.Tsinghua Univ, Beijing Key Lab Microanalyt Methods & Instrumenta, Dept Chem, Beijing 100084, Peoples R China 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zheng, Yun,Li, Yifeng,Wu, Tong,et al. Controlling crystal orientation in multilayered heterostructures toward high electro-catalytic activity for oxygen reduction reaction[J]. NANO ENERGY,2019,62:521-529. |
| APA | Zheng, Yun.,Li, Yifeng.,Wu, Tong.,Zhao, Chenhuan.,Zhang, Wenqiang.,...&Zhang, Jiujun.(2019).Controlling crystal orientation in multilayered heterostructures toward high electro-catalytic activity for oxygen reduction reaction.NANO ENERGY,62,521-529. |
| MLA | Zheng, Yun,et al."Controlling crystal orientation in multilayered heterostructures toward high electro-catalytic activity for oxygen reduction reaction".NANO ENERGY 62(2019):521-529. |
入库方式： OAI收割
来源：生态环境研究中心
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