[논문]The synergistic effect of nitrogen and fluorine co-doping in graphene quantum dot catalysts for full water splitting and supercapacitor

Sim, Yelyn; Kim, Seung Jae; Janani, Gnanaprakasam; Chae, Yujin; Surendran, Subramani; Kim, Hyunkyu; Yoo, Seungryul; Seok, Dong Chan; Jung, Yong Ho; Jeon, Cheolho; Moon, Joonhee; Sim, Uk

doi:10.1016/j.apsusc.2019.145157

[해외논문] The synergistic effect of nitrogen and fluorine co-doping in graphene quantum dot catalysts for full water splitting and supercapacitor

Applied surface science, v.507, 2020년, pp.145157 -

Sim, Yelyn (Department of Materials Science & Engineering, Chonnam National University) , Kim, Seung Jae (Division of Analytical Science Research, Korea Basic Science Institute (KBSI)) , Janani, Gnanaprakasam (Department of Materials Science & Engineering, Chonnam National University) , Chae, Yujin (Department of Materials Science & Engineering, Chonnam National University) , Surendran, Subramani (Department of Materials Science & Engineering, Chonnam National University) , Kim, Hyunkyu (Department of Materials Science & Engineering, Chonnam National University) , Yoo, Seungryul (Plasma Technology Research Center, National Fusion Research Institute) , Seok, Dong Chan (Plasma Technology Research Center, National Fusion Research Institute) , Jung, Yong Ho (Plasma Technology Research Center, National Fusion Research Institute Republic of Kore) , Jeon, Cheolho , Moon, Joonhee , Sim, Uk

Abstract ▼ AI-Helper

Abstract Development of efficient electrochemical catalysts is crucial for clean energy technologies such as water splitting, and batteries, etc. Despite large amounts of electrocatalyst research, it remains a challenge to eco-friendly non-metal catalyst showing high performance as much as novel metal. To achieve high performance as much as noble-metal, carbon nanomaterials (CNMs) have been attracted as a candidate to the widespread application using electrochemical reaction. Herein, we report nitrogen, and fluorine co-doped graphene quantum dot (N,F-GQDs) synthesized by two-step functionalizing method for highly efficient overall water splitting. N,F-GQDs demonstrate electrocatalytic effect toward HER, and OER, and is fabricated as two-electrode full-water splitting showing good stability at various potential points. Furthermore, due to fluorine treatment, prepared N,F-GQDs exhibits enhanced electrochemical reaction property, which can induce capacitance due to the large difference of electronegativity between fluorine and carbon. N,F-GQDs is applied for the anode of super capacitance in the three-electrode system and reveal specific capacitance of 270 F g−1 at 1 mV s−1 from CV curves, and GCD capacitance of 244 F g−1 at 3 mA cm−2. This work provides a new avenue for enhancing both activities of the electrocatalytic and electrochemical reaction. Highlights N and F doped GQDs were synthesized by two-step functionalization method. N,F-GQDs exhibit enhanced electrocatalytic and electrochemical reaction activities. N,F co-doped GQDs efficiently work on HER, OER, and supercapacitor.

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