التفاصيل البيبلوغرافية
| العنوان: |
Co2+‐coordinated NH2‐carbon Quantum Dots Hybrid Precursor for the Rational Synthesis of Co−CoOX/Co−N−C ORR Catalyst. |
| المؤلفون: |
Xu, Lian‐Hua1 (AUTHOR), Lu, Kun‐Kun1 (AUTHOR), Li, Junji1 (AUTHOR), Shan, Dan1 (AUTHOR) danshan@njust.edu.cn |
| المصدر: |
ChemCatChem. 6/5/2020, Vol. 12 Issue 11, p3082-3087. 6p. |
| مصطلحات موضوعية: |
*QUANTUM dots, *CITRIC acid, *CHEMICAL kinetics, *CARBON-black, *FUEL cells, *ELECTROCATALYSTS, *COORDINATION polymers |
| مستخلص: |
For the goal of practical industrial development of fuel cells, design and synthesis of electrocatalysts for oxygen reduction reactions (ORR) with sustainable and high performance are of great significance. In this work, the coordination of NH2‐carbon quantum dots (NCQDs) with Co2+ on carbon black was reasonably achieved via one‐pot and low‐cost hydrothermal treatment for the first time. Citric acid (CA) and urea (UA) were taken as carbon and nitrogen sources for NCQDs, respectively. The coordination of Co2+ and NCQDs were well‐characterized using spectroscopic techniques such as FTIR, UV‐visible absorption and fluorescence. Carbonization of carbon black‐supported Co/NCQDs at 800 °C under N2 atmosphere endows the pyrolysis products with high catalytic activity. The Co−CoOX/Co−N−C possesses enhanced ORR performance in terms of positive onset‐potential (∼‐0.079 V vs. SCE) and half wave potential (E1/2) (∼‐0.201 V vs. SCE), high stability, as well as the accelerated reaction kinetics. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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