Design and synthesis of carbonized polypyrrole-coated graphene aerogel acting as an efficient metal-free catalyst for oxygen reduction

RSC Advances ◽  
2014 ◽  
Vol 4 (33) ◽  
pp. 16979-16984 ◽  
Author(s):  
Hua Wei ◽  
Mao-Wen Xu ◽  
Shu-Juan Bao ◽  
Fan Yang ◽  
Hui Chai
Keyword(s):  
Oxygen Reduction ◽  
Hydrothermal Process ◽  
Alkaline Electrolyte ◽  
Graphene Aerogel ◽  
Metal Free ◽  
Design And Synthesis ◽  
Doped Graphene

Synthesis of 3D N-doped graphene aerogel for ORR in alkaline electrolyte using hydrothermal process without any oxidant.

Boron and phosphorous-doped graphene as a metal-free electrocatalyst for the oxygen reduction reaction in alkaline medium

RSC Advances ◽  
2015 ◽  
Vol 5 (66) ◽  
pp. 53637-53643 ◽  
Author(s):  
Gayoung Jo ◽  
Jakkid Sanetuntikul ◽  
Sangaraju Shanmugam
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Alkaline Electrolyte ◽  
Metal Free ◽  
Reduction Activity ◽  
Boron Doped ◽  
Doped Graphene ◽  
Single Precursor ◽  
Excellent Stability

Phosphorous and boron-doped graphene, prepared using a single precursor, showed reasonable oxygen reduction activity and excellent stability in alkaline electrolyte.

scholarly journals Nanosheets with High-Performance Electrochemical Oxygen Reduction Reaction Revived from Green Walnut Peel

Molecules ◽  
2022 ◽  
Vol 27 (1) ◽  
pp. 328
Author(s):  
Yifei Zhou ◽  
Lei Yan ◽  
Junhua Hou
Keyword(s):  
Oxygen Reduction ◽  
High Performance ◽  
Hot Spot ◽  
Hydrothermal Process ◽  
Reduction Reaction ◽  
Alkaline Electrolyte ◽  
High Catalytic Activity ◽  
Metal Free ◽  
Thin Carbon ◽  
Wide Range

The synthesis of metal-free carbon-based electrocatalysts for oxygen reduction reactions (ORR) to replace conventional Pt-based catalysts has become a hot spot in current research. This work proposes an activation-assisted carbonization strategy, to manufacture N-doped ultra-thin carbon nanosheets (GWS180M800) with high catalytic activity, namely, melamine is used as an accelerator/nitrogen source, and walnut green peels biological waste as a carbon source. The melamine acts as a nitrogen donor in the hydrothermal process, effectively enhancing the nitrogen doping rate. The content of pyridine nitrogen groups accounts for up to 48.5% of the total nitrogen content. Electrochemical tests show that the GWS180M800 has excellent ORR electrocatalytic activity and stability, and makes a quasi-four-electron ORR pathway clear in the alkaline electrolyte. The initial potential and half slope potential are as high as 1.01 and 0.82 V vs. RHE, respectively. The GWS180M800 catalyst has a better ability to avoid methanol cross poisoning than Pt/C has. Compared with 20 wt% Pt/C, GWS180M800 has improved methanol tolerance and stability. It is a metal-free biochar ORR catalyst with great development potential and application prospects. This result provides a new space for the preparation of valuable porous nano-carbon materials based on carbonaceous solid waste and provides new ideas for catalyzing a wide range of electrochemical reactions in the future.

scholarly journals Noble-Metal-Free Iron Nitride/Nitrogen-Doped Graphene Composite for the Oxygen Reduction Reaction

ACS Omega ◽  
2019 ◽  
Vol 4 (1) ◽  
pp. 130-139 ◽  
Author(s):  
Tamás Varga ◽  
Lívia Vásárhelyi ◽  
Gergő Ballai ◽  
Henrik Haspel ◽  
Albert Oszkó ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Noble Metal ◽  
Reduction Reaction ◽  
Iron Nitride ◽  
Nitrogen Doped ◽  
Metal Free ◽  
Graphene Composite ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene
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