Highly Localized C-N2 Sites for Efficient Oxygen Reduction
文献类型：期刊论文
| 作者 | Ju, Qiangjian; Ma, Ruguang; Hu, Yifan; Guo, Beibei; Liu, Qian; Thomas, Tiju; Zhang, Tao; Yang, Minghui; Chen, Wei; Wang, Jiacheng |
| 刊名 | ACS CATALYSIS
 |
| 出版日期 | 2020 |
| 卷号 | 10期号:16页码:9366-9375 |
| 关键词 | N-DOPED CARBON HIERARCHICALLY POROUS CARBON METAL-FREE ELECTROCATALYSTS TRIAZINE-BASED FRAMEWORK BIFUNCTIONAL CATALYSTS ACTIVE-SITES EVOLUTION GRAPHENE ORR NANOSHEETS |
| DOI | 10.1021/acscatal.0c00474 |
| 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. |
| 学科主题 | Chemistry |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/20565]  |
| 专题 | 2020专题 2020专题_期刊论文 |
| 作者单位 | 1.Wang, JC (corresponding author), Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China. 2.Ma, RG 3.Wang, JC (corresponding author), Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Ju, Qiangjian,Ma, Ruguang,Hu, Yifan,et al. Highly Localized C-N2 Sites for Efficient Oxygen Reduction[J]. ACS CATALYSIS,2020,10(16):9366-9375. |
| APA | Ju, Qiangjian.,Ma, Ruguang.,Hu, Yifan.,Guo, Beibei.,Liu, Qian.,...&Wang, Jiacheng.(2020).Highly Localized C-N2 Sites for Efficient Oxygen Reduction.ACS CATALYSIS,10(16),9366-9375. |
| MLA | Ju, Qiangjian,et al."Highly Localized C-N2 Sites for Efficient Oxygen Reduction".ACS CATALYSIS 10.16(2020):9366-9375. |
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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