scholarly journals Bifunctional Electrocatalysts: A Tailored Bifunctional Electrocatalyst: Boosting Oxygen Reduction/Evolution Catalysis via Electron Transfer Between N-Doped Graphene and Perovskite Oxides (Small 48/2018)

Small ◽  
2018 ◽  
Vol 14 (48) ◽  
pp. 1870228
Author(s):  
Yunfei Bu ◽  
Gyutae Nam ◽  
Seona Kim ◽  
Keunsu Choi ◽  
Qin Zhong ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Oxygen Reduction ◽  
Perovskite Oxides ◽  
Bifunctional Electrocatalyst ◽  
Bifunctional Electrocatalysts ◽  
Doped Graphene

Mn-Co oxide/PEDOT as a bifunctional electrocatalyst for oxygen evolution/reduction reactions

2015 ◽  
Vol 1777 ◽  
pp. 1-6 ◽  
Author(s):  
Elaheh Davari ◽  
Douglas G. Ivey
Keyword(s):  
Oxygen Reduction ◽  
Oxygen Evolution ◽  
Linear Sweep Voltammetry ◽  
Microstructural Characterization ◽  
Rotating Disk ◽  
Reduction Reaction ◽  
Rotating Disk Electrode ◽  
Bifunctional Electrocatalyst ◽  
Bifunctional Electrocatalysts ◽  
Anodic Electrodeposition

ABSTRACTBifunctional electrocatalysts, which facilitate the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), are vital components in advanced metal-air batteries. Results are presented for carbon-free, nanocrystalline, rod-like, Mn-Co oxide/PEDOT bifunctional electrocatalysts, prepared by template-free sequential anodic electrodeposition. Electrochemical characterization of synthesized electrocatalysts, with and without a conducting polymer (PEDOT) coating, was performed using cyclic voltammetry (CV) and linear sweep voltammetry (LSV). In addition, microstructural characterization was conducted using SEM, TEM, STEM and XPS. Mn-Co oxide/PEDOT showed improved ORR/OER performance relative to Mn-Co oxide and PEDOT. On the basis of rotating disk electrode (RDE) experiments, Mn-Co oxide/PEDOT displayed the desired 4-electron transfer oxygen reduction pathway. Comparable ORR activity and superior OER activity relative to commercial Pt/C were observed.

Cobalt oxide-coated N- and B-doped graphene hollow spheres as bifunctional electrocatalysts for oxygen reduction and oxygen evolution reactions

2016 ◽  
Vol 4 (16) ◽  
pp. 5877-5889 ◽  
Author(s):  
Zhongqing Jiang ◽  
Zhong-Jie Jiang ◽  
Thandavarayan Maiyalagan ◽  
Arumugam Manthiram
Keyword(s):  
Electrochemical Performance ◽  
Oxygen Reduction ◽  
Cobalt Oxide ◽  
Oxygen Evolution ◽  
Hollow Spheres ◽  
Bifunctional Electrocatalysts ◽  
Doped Graphene

Co3O4-coated N- and B-doped graphene hollow spheres synthesized by a simple and scalable method have been used as electrocatalysts for the ORR and the OER, demonstrating higher electrochemical performance and better durability than commercial Pt/C and RuO2/C, respectively.

scholarly journals Cobalt and Nitrogen Co-Doped Graphene-Carbon Nanotube Aerogel as an Efficient Bifunctional Electrocatalyst for Oxygen Reduction and Evolution Reactions

Catalysts ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 275 ◽  
Author(s):  
Xiaochang Qiao ◽  
Jutao Jin ◽  
Hongbo Fan ◽  
Lifeng Cui ◽  
Shan Ji ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Oxygen Reduction ◽  
Bifunctional Electrocatalyst ◽  
Doped Graphene ◽  
Co Doped

Preparation of a One-Dimensional Hierarchical MnO@CNT@Co-N/C Ternary Nanostructure as a High-Performance Bifunctional Electrocatalyst for Rechargeable Zn-Air Batteries

2021 ◽  
Author(s):  
Fen Li ◽  
Qin Tengteng ◽  
Yuping Sun ◽  
Renjun Jiang ◽  
Jiangfeng Yuan ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
High Performance ◽  
Reduction Reaction ◽  
One Dimensional ◽  
Bifunctional Electrocatalyst ◽  
Significant Challenge ◽  
Bifunctional Electrocatalysts

Developing high-performance bifunctional electrocatalysts for both the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is a significant challenge for the implementation of rechargeable Zn-air batteries. Herein, MnO2 nanotubes...

scholarly journals Heteroatom (Nitrogen/Sulfur)-Doped Graphene as an Efficient Electrocatalyst for Oxygen Reduction and Evolution Reactions

Catalysts ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 475 ◽  
Author(s):  
Jian Zhang ◽  
Jia Wang ◽  
Zexing Wu ◽  
Shuai Wang ◽  
Yumin Wu ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Carbon Nanomaterials ◽  
Carbon Materials ◽  
Electrochemical Reactions ◽  
Intrinsic Structure ◽  
Bifunctional Electrocatalyst ◽  
Structure And Property ◽  
Energy Conversion And Storage ◽  
Doped Graphene ◽  
And Storage

Carbon nanomaterials are potential materials with their intrinsic structure and property in energy conversion and storage. As the electrocatalysts, graphene is more remarkable in electrochemical reactions. Additionally, heteroatoms doping with metal-free materials can obtain unique structure and demonstrate excellent electrocatalytic performance. In this work, we proposed a facile method to prepare bifunctional electrocatalyst which was constructed by nitrogen, sulfur doped graphene (NSG), which demonstrate superior properties with high activity and excellent durability compared with Pt/C and IrO2 for oxygen reduction (OR) and oxygen evolution (OE) reactions. Accordingly, these phenomena are closely related to the synergistic effect of doping with nitrogen and sulfur by rationally regulating the polarity of carbon in graphene. The current work expands the method towards carbon materials with heteroatom dopants for commercialization in energy-related reactions.

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