Nitrogen and Phosphorus Dual-Doped Graphene/Carbon Nanosheets as Bifunctional Electrocatalysts for Oxygen Reduction and Evolution

ACS Catalysis ◽  
2015 ◽  
Vol 5 (7) ◽  
pp. 4133-4142 ◽  
Author(s):  
Rong Li ◽  
Zidong Wei ◽  
Xinglong Gou
Keyword(s):  
Oxygen Reduction ◽  
Nitrogen And Phosphorus ◽  
Carbon Nanosheets ◽  
Bifunctional Electrocatalysts ◽  
Doped Graphene

Catalytic Activity of Silver Metal Supported on Doped Graphene in Alkaline Medium for Oxygen Reduction Reaction

2019 ◽  
Vol 1155 ◽  
pp. 55-69
Author(s):  
Nabila A. Karim ◽  
Nor Shahirah Shamsul ◽  
Siti Kartom Kamarudin
Keyword(s):  
Fuel Cell ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Adsorption Energy ◽  
Reduction Reaction ◽  
Pt Catalyst ◽  
Nitrogen And Phosphorus ◽  
Doped Graphene ◽  
Phosphorus Doped ◽  
Silver Metal

The platinum (Pt) degradation, poisoning and carbon corrosion in acidic fuel cell has led to explore the research in alkaline fuel cell. However, the high cost of Pt has brought a lot of studies to find replacement for Pt catalyst. Due to that, silver metal is selected as non-Pt catalyst and supported by the nitrogen and phosphorus-doped on graphene for oxygen reduction reaction in alkaline medium. The adsorption energy and mechanism of the oxygen reduction reaction is studied by using density functional theory (DFT) calculation. The support catalyst of graphene is doped with three atom nitrogen and phosphorus namely as N3 and P3, respectively. The Ag supported on N3 and P3 are tested on O2, OOH, O and OH species. There are two types adsorption of O2 on N3 and P3 which is side and end-on adsorption configuration. The N3-Ag has similar adsorption energy for both configurations, but P3-Ag has low adsorption energy by end-on adsorption configuration. The effect of doped atoms on graphene also have been tested on O2, OOH, O and OH species. The result shows that increasing nitrogen doping atom has decreased the adsorption energy of O2 and vice versa on phosphorus atoms. A single phosphorus doping atom on graphene has shown the lowest adsorption energy, but the end-on configuration of P3-Ag has shown most stable adsorption. The schematic free energy profile shows that both N3-Ag and P3-Ag have high possibilities to be followed in oxygen reduction reaction mechanism but P3-Ag has advantage due to stable adsorption as non-Pt catalyst. The Ag metal supported on nitrogen and phosphorus-doped graphene show promising result to be a catalyst in alkaline fuel cell.

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.

Cobalt and nitrogen codoped ultrathin porous carbon nanosheets as bifunctional electrocatalysts for oxygen reduction and evolution

Carbon ◽  
2019 ◽  
Vol 141 ◽  
pp. 704-711 ◽  
Author(s):  
Youchen Tang ◽  
Ruliang Liu ◽  
Shaohong Liu ◽  
Bingna Zheng ◽  
Yuheng Lu ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Porous Carbon ◽  
Carbon Nanosheets ◽  
Bifunctional Electrocatalysts
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