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Title: Layered spongy-like O-doped g-C3N4 : an efficient non-metal oxygen reduction catalyst for alkaline fuel cells
Authors: Mei, R
Ma, L
An, LA 
Wang, F
Xi, J
Sun, H
Luo, Z
Wu, Q
Issue Date: Jan-2017
Source: Journal of the Electrochemical Society, Jan. 2017, v. 164, no. 4, p. F354-F363
Abstract: Here we report a polycondensation reaction combined with a solution mixing pathway to synthesize an O-doped graphitic carbon nitride (g-C3N4) by using melamine and cyanuric acid. Structural and morphological characterizations revealed the successful preparation of O-doped g-C3N4 with a layered spongy-like micro-nanostructure, which favored the enhancement of O-2 adsorption and active sites. The UV-vis spectra and Mott-Schottky analysis indicated that the introduction of oxygen leaded to a narrow bandgap, a negative shift of valance band maximum and an increased electrical conductivity. As a result, the O-doped g-C3N4 exhibited a higher mass activity (14.9 mA/mg(catalyst) at -0.60 V and 1800 rpm) and 60 mV positive shift of half-wave potential toward oxygen reduction reaction (ORR) as well as a better electron transfer efficiency than did the g-C3N4 without oxygen doping. In order to further increase the ORR activity, Ketjen black carbon was incorporated into the O-doped g-C3N4 catalyst to promote the electron transfer. The resulting catalyst showed a comparable ORR activity (a kinetic-limiting current density of 21.5 mA cm(-2) at -0.6 V), excellent stability and remarkable tolerance to methanol as compared with the Pt/C catalyst, indicating its potential application as a non-metal cathode catalyst for the alkaline direct methanol fuel cell.
Publisher: Electrochemical Society
Journal: Journal of the Electrochemical Society 
ISSN: 0013-4651
EISSN: 1945-7111
DOI: 10.1149/2.1191704jes
Rights: © 2017 The Electrochemical Society. All rights reserved.
This manuscript version is made available under the CC-BY-NC-ND 4.0 license (
The following publication Mei, R., Ma, L., An, L., Wang, F., Xi, J., Sun, H., ... & Wu, Q. (2017). Layered spongy-like O-doped g-C3N4: an efficient non-metal oxygen reduction catalyst for alkaline fuel cells. Journal of The Electrochemical Society, 164(4), F354 is available at
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