Details

Autor(en) / Beteiligte

• Yang, Yu Jun
• Duan, Manhua
• Yan, Chunxia
• Zhao, Dandan
• Jiang, Cao
• Duan, Xinyu
• Song, Xinyi

Titel

Facile synthesis of CoFe-LDH/MWCNT/rGO nanocomposite as efficient bifunctional electrocatalysts for oxygen evolution and reduction

Ist Teil von

• Journal of electroanalytical chemistry (Lausanne, Switzerland), 2020-01, Vol.856, p.113697, Article 113697

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2020

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• The hydrothermal synthesis of CoFe layered double hydroxide/multiwalled carbon nanotube/reduced graphene oxide (CoFe-LDH/MWCNT/rGO) nanocomposite, a highly efficient bifunctional electrocatalyst for oxygen evolution reaction (OER) and oxygen reduction reactions (ORR), was reported in this work. The hybridization of MWCNT and rGO with CoFe-LDH endows the obtained nanocomposite both hierarchical porous structure and enhanced conductivity, which significantly facilitate the mass transport and charge transfer efficiency for OER and ORR. CoFe-LDH/MWCNT/rGO displayed efficient OER activity in 1.0 M KOH with a low onset overpotential of 330 mV and an overpotential of 430 mV to reach the 10 mA/cm2 current density. The CoFe-LDH/MWCNT/rGO also presents excellent ORR catalytic activity with onset potential of 708 mV vs. RHE in 0.1 M KOH with a 4e-route selectivity. The excellent bifunctional catalytic activity of the CoFe-LDH/MWCNT/rGO for OER and ORR could be attributed to the synergistic effects of MWCNT, rGO and CoFe-LDH. •CoFe-LDH/MWCNT/rGO was synthesized via a hydrothermal method.•OER and ORR activities of CoFe-LDH/MWCNT/rGO in alkaline media were studied.•CoFe-LDH/MWCNT/rGO shows OER activity with an onset overpotential of 330 mV.•CoFe-LDH/MWCNT/rGO presents an ORR onset potential of 708 mV.•CoFe-LDH/MWCNT/rGO-catalyzed ORR follows a predominant 4-electron pathway.