Graphene quantum dots decorated 3D transitional metal (Fe, Co) oxide graphene nanoribbons for oxygen reduction reaction

• Published in: Carbon Letters Vol. 33; no. 1; pp. 155 - 162
• Main Authors: Zhao, Xiyu, Lu, Changrui, Li, Jing, Liu, Caiyun, Cao, Cheng, Wu, Tianli
• Format: Journal Article
• Language: English
• Published: Singapore Springer Nature Singapore 01.02.2023; 한국탄소학회; Springer Nature B.V
• Subjects: Adsorption; Carbon; Catalysts; Characterization and Evaluation of Materials; Chemical reduction; Chemistry and Materials Science; Electrical conductivity; Electrical resistivity; Electrodes; Electrolytes; Electrons; Graphene; Hybrid composites; Iron oxides; Materials Engineering; Materials Science; Metal oxides; Nanocomposites; Nanoparticles; Nanoribbons; Nanotechnology; Organic chemicals; Original Article; Oxygen reduction reactions; Quantum dots; Synergistic effect; Three dimensional composites; Ultrasonic imaging; Ultrasonic processing; CoO; Electro-catalyst; ORR; 3D graphene nanoribbons; Fe; O; Fe3O4
• ISSN: 1976-4251; 2233-4998
• DOI: 10.1007/s42823-022-00412-z

In this paper, we presented a hybrid composite of graphene quantum dots (GQDs)-modified three-dimensional graphene nanoribbons (3D GNRs) composite linked by Fe 3 O 4 and CoO nanoparticles through reflux and ultrasonic treatment with GQDs, denoted as 3D GQDs-Fe 3 O 4 /CoO@GNRs (3D GFCG). In this hybrid, the 3D GNRs framework strengthened the electrical conductivity and the synergistic effects between GQDs and 3D GFCG enhanced the oxygen reduction reaction (ORR) activity of the nanocomposite. The results imply that decorating GQDs with other electro-catalysts is an effective strategy to synergistically improve their ORR activity.