Electrochemical oxygen reduction activity of intermediate onion-like carbon produced by the thermal transformation of nanodiamond

Onion-like carbon (OLC) is known to form as an intermediate structure when nanodiamond (ND) is heat treated at 1100–1500°C. In this letter, we report on the electrochemical activity of its oxygen reduction reaction (ORR) when prepared at temperatures from 1000 to 2000°C. The ORR activity is found to...

Full description

Saved in:
Bibliographic Details
Published in:Carbon (New York) 2015-06, Vol.87, p.415-417
Main Authors: Kannari, Naokatsu, Itakura, Takayoshi, Ozaki, Jun-ichi
Format: Article
Language:English
Subjects:
Carbon
Correlation
Curved
Defects
Formations
Nanostructure
Reduction
Thermal transformations
Transformations (mathematics)
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Onion-like carbon (OLC) is known to form as an intermediate structure when nanodiamond (ND) is heat treated at 1100–1500°C. In this letter, we report on the electrochemical activity of its oxygen reduction reaction (ORR) when prepared at temperatures from 1000 to 2000°C. The ORR activity is found to exhibit excellent correlation with the degree of defects, with OLC prepared at 1400°C found to have the highest activity. This is attributed to the formation of curved graphitic layers containing edges during ND-OLC transformation, which function as active sites for the adsorption and subsequent reduction of oxygen.
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2015.02.050