Facile synthesis of nitrogen‑doped carbon dots (N‑CDs) and N‑CDs/NiO composite as an efficient electrocatalyst for oxygen evolution reaction
(주)코리아스칼라
- 최초 등록일
- 2023.05.08
- 최종 저작일
- 2021.08
- 12페이지/ 어도비 PDF
- 가격 4,300원
* 본 문서는 배포용으로 복사 및 편집이 불가합니다.
서지정보
ㆍ발행기관 : 한국탄소학회
ㆍ수록지정보 : Carbon letters / 31권 / 4호
ㆍ저자명 : Xiaoli Kou, Xin Xin, Yan Zhang, Long‑Yue Meng
목차
Abstract
1 Introduction
2 Experimental section
2.1 Materials
2.2 Synthesis of N-CDs
2.3 Preparation of N-CDsNiO composite
2.4 Fe ion detection
2.5 Electrochemical measurements
2.6 Material characterization
3 Results and discussion
3.1 Optical and microscopic studies of N-CDs
3.2 Structural and morphological analyses of N-CDsNiO composite
3.3 Fluorescence response of N-CDs to Fe3+
3.4 Electrochemical activity of N-CDsNiO toward OER
4 Conclusion
Acknowledgements
References
영어 초록
Nitrogen-doped carbon dots (N-CDs), derived from the biomass (anthocyanin), are the novel additive to the nanocarbon materials, which is expected to bring a wide spectrum of novel applications. Moreover, metallic oxides are emerging for their unique potential for electrocatalysis. Herein, we report the synthesis of N-CDs for the selective detection of Fe3+ with a limit of detection of 2.57 μM in the range of 5–60 μM using ethylenediamine and H2O2 by a hydrothermal method. The obtained N-CDs displayed a spherical morphology with a particle size range of 2–7 nm and emitted blue luminescence at 394 nm under excitation at 319 nm. Meanwhile, we have demonstrated the fabrication of cost-efficient electrocatalysts for oxygen evolution reaction (OER) in an alkaline medium, employing N-CDs. Owing to the successful incorporation of N-CDs into NiO nanospheres, the resulting N-CDs/NiO with large surface areas, fast charge transfer, and increased conductivity vastly improved the catalytic activity. Remarkably, the optimal of N-CDs/NiO composite requires the overpotential of only 380 mV at a current density of 10 mA cm− 2 and a relatively low Tafel slope of 57.96 mV dec− 1 compared with pure NiO. These results open up a facile route for the application of N-CDs and offer prospects for CD-metal hybrids as high OER catalysts in electrochemical energy devices.
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