Highly Localized C-N2 Sites for Efficient Oxygen Reduction
文献类型：期刊论文
| 作者 | Ju, QJ; Ma, RG; Hu, YF; Guo, BB; Liu, Q; Thomas, T; Zhang, T; Yang, MH; Chen, W; Wang, JC |
| 刊名 | ACS CATALYSIS
 |
| 出版日期 | 2020-08-21 |
| 期号 | 16页码:9366 |
| ISSN号 | 2155-5435 |
| DOI | 10.1021/acscatal.0c00474 |
| 文献子类 | Article |
| 英文摘要 | The search for oxygen reduction reaction (ORR) catalysts outperforming Pt, the state-of-the-art material, continues. Doped carbon-based materials offer a viable means for replacing Pt, but their activity improvement still remains a great challenge. Here, configurations of N-doped carbons are first analyzed using ab initio simulations toward ORR. The results show that a certain short-range ordered structure labeled as C-N2, which comprises of two nitrogen atoms flanking carbon, is the optimal choice. The predicted configuration of C-N2 is experimentally realized by triazine-doped carbon (triNC). The triNC with C-N2 sites demonstrates high ORR activity (onset potential 0.98 V, halfwave potential 0.89 V) comparable to commercial 20% Pt/C. The highly localized and positive-charged carbon atom in the C-N2 structure facilitates the dissociation of O-2 to increase the ORR kinetics, proved by theoretical calculation. A Zn-air cathode is fabricated using the triNC ORR electrocatalyst and outperforms the cathode using Pt/C in terms of specific capacity, energy density and long-term durability. The atomic-scale approach reported here provides a good strategy to achieve active carbon-based electrocatalysts for potential and scalable use in energy conversion and storage. |
| WOS关键词 | N-DOPED CARBON ; HIERARCHICALLY POROUS CARBON ; METAL-FREE ELECTROCATALYSTS ; TRIAZINE-BASED FRAMEWORK ; BIFUNCTIONAL CATALYSTS ; ACTIVE-SITES ; EVOLUTION ; GRAPHENE ; ORR ; NANOSHEETS |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.sic.ac.cn/handle/331005/27814]  |
| 专题 | 中国科学院上海硅酸盐研究所 |
| 推荐引用方式 GB/T 7714 | Ju, QJ,Ma, RG,Hu, YF,et al. Highly Localized C-N2 Sites for Efficient Oxygen Reduction[J]. ACS CATALYSIS,2020(16):9366. |
| APA | Ju, QJ.,Ma, RG.,Hu, YF.,Guo, BB.,Liu, Q.,...&Wang, JC.(2020).Highly Localized C-N2 Sites for Efficient Oxygen Reduction.ACS CATALYSIS(16),9366. |
| MLA | Ju, QJ,et al."Highly Localized C-N2 Sites for Efficient Oxygen Reduction".ACS CATALYSIS .16(2020):9366. |
入库方式： OAI收割
来源：上海硅酸盐研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。