A hybrid transition metal nanocrystal-embedded graphitic carbon nitride nanosheet system as a superior oxygen electrocatalyst for rechargeable Zn-air batteries | |
Niu, Wen-Jun2,5; He, Jin-Zhong2,5; Wang, Ya-Ping2,5; Sun, Qiao-Qiao2,5; Liu, Wen-Wu2,5; Zhang, Lu-Yin2,5; Liu, Mao-Cheng2,5; Liu, Ming-Jin1,3,4; Chueh, Yu-Lun1,3,4 | |
刊名 | Nanoscale |
2020-10-14 | |
卷号 | 12期号:38页码:19644-19654 |
关键词 | Cathodes Electrocatalysis Electrocatalysts Graphitic Carbon Nitride Iridium compounds Nanocrystals Nanosheets Oxygen Oxygen reduction reaction Platinum compounds Synthesis (chemical) Transition metals Cycling stability Electrocatalytic activity Half-wave potential Metal nanocrystals Metallic acetylacetonates Oxygen electrocatalysis Peak power densities Specific capacities |
ISSN号 | 20403364 |
DOI | 10.1039/d0nr03987j |
英文摘要 | In this study, we, for the first time, demonstrate a general solid-phase pyrolysis method to synthesize hybrid transition metal nanocrystal-embedded graphitic carbon nitride nanosheets, namely M-CNNs, as a highly efficient oxygen electrocatalyst for rechargeable Zn-air batteries (ZABs). The ratios between metallic acetylacetonates and the g-C3N4 precursor can be controlled where Fe-CNNs-0.7, Ni-CNNs-0.7 and Co-NNs-0.7 composites have been optimized to exhibit superior ORR/OER bifunctional electrocatalytic activities. Specifically, Co-CNNs-0.7 exhibited not only a comparable half-wave potential (0.803 V vs. RHE) to that of the commercial Pt/C catalyst (0.832 V) with a larger current density for the ORR but also a lower overpotential (440 mV) toward the OER compared with the commercial IrO2 catalyst (460 mV), revealing impressive application in rechargeable ZABs. As a result, ZABs using Co-CNNs-0.7 as the cathode exhibited an excellent peak power density of 85.3 mW cm-2 with a specific capacity of 675.7 mA h g-1 and remarkable cycling stability of 1000 cycles, outperforming the commercially available Pt/C + IrO2 catalysts. This study highlights the synergy from heterointerfaces in oxygen electrocatalysis, thus providing a promising approach for advanced metal-air cathode materials. © 2020 The Royal Society of Chemistry. |
WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics |
语种 | 英语 |
出版者 | Royal Society of Chemistry |
WOS记录号 | WOS:000578100000009 |
内容类型 | 期刊论文 |
源URL | [http://ir.lut.edu.cn/handle/2XXMBERH/115725] |
专题 | 省部共建有色金属先进加工与再利用国家重点实验室 材料科学与工程学院 |
作者单位 | 1.Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu; 30013, Taiwan 2.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 3.Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu; 30013, Taiwan; 4.Department of Physics, National Sun Yat-Sen University, Kaohsiung; 80424, Taiwan; 5.State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; |
推荐引用方式 GB/T 7714 | Niu, Wen-Jun,He, Jin-Zhong,Wang, Ya-Ping,et al. A hybrid transition metal nanocrystal-embedded graphitic carbon nitride nanosheet system as a superior oxygen electrocatalyst for rechargeable Zn-air batteries[J]. Nanoscale,2020,12(38):19644-19654. |
APA | Niu, Wen-Jun.,He, Jin-Zhong.,Wang, Ya-Ping.,Sun, Qiao-Qiao.,Liu, Wen-Wu.,...&Chueh, Yu-Lun.(2020).A hybrid transition metal nanocrystal-embedded graphitic carbon nitride nanosheet system as a superior oxygen electrocatalyst for rechargeable Zn-air batteries.Nanoscale,12(38),19644-19654. |
MLA | Niu, Wen-Jun,et al."A hybrid transition metal nanocrystal-embedded graphitic carbon nitride nanosheet system as a superior oxygen electrocatalyst for rechargeable Zn-air batteries".Nanoscale 12.38(2020):19644-19654. |
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