Open AccessCo2P Embedded into P and N Dual-Doped Carbon Nanotubes and Graphene as a Bifunctional Oxygen Electrocatalyst
Author(s) -
Qun Shao,
H G Wang,
Qian Duan
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1605/1/012175
Subject(s) - bifunctional , electrocatalyst , overpotential , oxygen evolution , graphene , cobalt , carbon nanotube , catalysis , materials science , nanoparticle , chemical engineering , oxygen reduction reaction , nanotechnology , bifunctional catalyst , chemistry , electrode , electrochemistry , organic chemistry , metallurgy , engineering
The reasonable design of inexpensive and efficient bifunctional electrocatalyst towards oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is still challenging for Zn-air batteries. Herein, a novel and effective design is proposed to fabricate Co 2 P nanoparticles encapsulated in doped carbon nanotubes and rGO sheets (Co 2 P/NPCNTs-rGO) through a direct self-catalyzed growth procedure. That is, cobalt phthalocyanine derivatives as the cobalt sources are not only employed to form Co 2 P nanoparticles, but also used to catalyze the formation of CNTs and rGO. Benefiting from the unique structure and composition, the Co2P/NPCNTs-rGO-800 shows significant OER (overpotential of 420 mV) and ORR (half-wave potential of 0.73 V) properties. Most importantly, the activity parameter of Co2P/NPCNTs-rGO-800 (ΔE=0.92 V) is comparable to that of RuO 2 (0.91 V) and lower than that of Pt/C (1.05 V), indicating that Co2P/NPCNTs-rGO-800 is of a good comprehensive ORR/OER bifunctional performance. This work provides an effective strategy for the synthesis of outstanding multifunctional catalysts for wider practical applications.