Edge-rich and (N, S)-doped 3D porous graphene as an efficient metal-free electrocatalyst for the oxygen reduction reaction

RSC Advances ◽  
2016 ◽  
Vol 6 (93) ◽  
pp. 90384-90387 ◽  
Author(s):  
Xiaobo Wu ◽  
Zhiyong Xie ◽  
Min Sun ◽  
Ting Lei ◽  
Zhenmin Zuo ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Reduction Reaction ◽  
Chemical Corrosion ◽  
Metal Free ◽  
Porous Graphene

A novel edge-rich and (N, S)-doped 3D porous graphene was synthesized by chemical vapor deposition (CVD) and chemical corrosion.

Oxygen Reduction Performance of Pt/TiO2-C Electrocatalyst prepared by Two-step Chemical Vapor Deposition

2012 ◽  
Vol 15 (3) ◽  
pp. 123-128 ◽  
Author(s):  
R.G. González Huerta ◽  
M.A. Valenzuela ◽  
R. Vargas García ◽  
N. Alonso-Vante ◽  
M. Tufiño Velázquez ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Acid Medium ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Reduction Reaction ◽  
Chemical Vapor Deposition Method ◽  
Active Surface Area ◽  
Co Stripping

The low durability of Pt/C electro-catalysts in polymer electrolyte membrane fuel cells (PEMFC), e.g., as a result of carbon oxidation to CO2 in an acid medium, has been recognized as one of the most important hindrances to long-term stability. In this work, Pt electrocatalysts supported on TiO2-carbon and Vulcan carbon were prepared by the chemical vapor deposition method. The physical and electrochemical properties of Pt/TiO2-C and Pt/C electrocatalysts were investigated by the characterization techniques of XRD, TEM, CO stripping and cyclic and linear voltammetry. The prepared materials were electrochemically evaluated in the oxygen reduction reaction (ORR) in an acid medium at room temperature. The XRD results show crystalline fcc platinum formation. The mean particle size is between 2 and 4 nm with a spherical morphology. Pt/TiO2-C electrocatalysts showed a higher electrochemical active surface area and better activity results for the ORR compared with the Pt/C samples. The addition of TiO2 to the conventional Pt/C catalyst modifies the electronic properties affecting the oxygen adsorption and improving the catalytic activity for the oxygen reduction reaction.

Sulfur-doped porous graphene frameworks as an efficient metal-free electrocatalyst for oxygen reduction reaction

2018 ◽  
Vol 214 ◽  
pp. 209-212 ◽  
Author(s):  
Chunxia Wang ◽  
Fan Yang ◽  
Chong Xu ◽  
Yan Cao ◽  
Huangliang Zhong ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Metal Free ◽  
Porous Graphene
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