Carbon Nanotubes Loaded on Graphene Microfolds as Efficient Bifunctional Electrocatalysts for the Oxygen Reduction and Oxygen Evolution Reactions

ChemCatChem ◽  
2017 ◽  
Vol 9 (24) ◽  
pp. 4520-4528 ◽  
Author(s):  
Bo Fang ◽  
Jia Yang ◽  
Chen Chen ◽  
Chunxiao Zhang ◽  
Dan Chang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Oxygen Reduction ◽  
Oxygen Evolution ◽  
Bifunctional Electrocatalysts

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.

Insights into the Electronic Structure of Fe Penta-Coordinated Complexes. Spectroscopic Examination and Electrochemical Analysis for the Oxygen Reduction and Oxygen Evolution Reactions.

2021 ◽  
Author(s):  
César Zúñiga-Loyola ◽  
Gabriel Abarca ◽  
Maria Soledad Ureta-Zanartu ◽  
Carolina Aliaga ◽  
Jose Zagal ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electronic Structure ◽  
Oxygen Reduction ◽  
Oxygen Evolution ◽  
Photoelectron Spectroscopy ◽  
Electrochemical Analysis ◽  
X Ray ◽  
Spectroscopic Examination ◽  
Modified Carbon Nanotubes

Fe phthalocyanine was coordinated to pyridine-modified carbon nanotubes and studied as a catalyst for the oxygen reduction (ORR) and oxygen evolution reactions (OER). X-ray Photoelectron Spectroscopy (XPS), Mössbauer, and Electron...

MOF-derived Fe,Co@N–C bifunctional oxygen electrocatalysts for Zn–air batteries

2020 ◽  
Vol 8 (18) ◽  
pp. 9355-9363 ◽  
Author(s):  
Xinde Duan ◽  
Shuangshuang Ren ◽  
Na Pan ◽  
Mingdao Zhang ◽  
Hegen Zheng
Keyword(s):  
Catalytic Activity ◽  
Oxygen Reduction ◽  
Oxygen Evolution ◽  
High Catalytic Activity ◽  
Reduction Reactions ◽  
Oxygen Reduction Reactions ◽  
Bifunctional Electrocatalysts

MOF-derived Fe,Co@N-C bifunctional electrocatalysts for oxygen reduction reactions and oxygen evolution reactions have been prepared via a scalable method, exhibiting ultra-high catalytic activity and promising performance in Zn–air batteries.

Co5.47N loaded N-doped carbon as an efficient bifunctional oxygen electrocatalyst for a Zn–air battery

Nanoscale ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 6089-6095
Author(s):  
Zichao Rong ◽  
Chenlong Dong ◽  
Shaoning Zhang ◽  
Wujie Dong ◽  
Fuqiang Huang
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Reduction Reaction ◽  
Pivotal Role ◽  
Highly Active ◽  
Bifunctional Electrocatalysts ◽  
Air Battery

Highly active bifunctional electrocatalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) play a pivotal role in Zn–air batteries.

Co/Co9S8@carbon nanotubes on a carbon sheet: facile controlled synthesis, and application to electrocatalysis in oxygen reduction/oxygen evolution reactions, and to a rechargeable Zn-air battery

2021 ◽  
Author(s):  
Han-Ming Zhang ◽  
Chunyan Hu ◽  
Muwei Ji ◽  
Minjie Wang ◽  
Jiali Yu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Oxygen Reduction ◽  
Graphene Sheet ◽  
Oxygen Evolution ◽  
Controlled Synthesis ◽  
Porous Graphene ◽  
Carbon Sheet ◽  
Air Battery

A facile strategy to fabricate Co/Co9S8 nanoparticles-encapsulated in carbon nanotubes, on an N-doped porous graphene sheet (Co/Co9S8@CNTs) via pyrolysis of a mixture of Co(NO3)2, melamine and l-cysteine is reported.

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.

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