Facile synthesis of N-doped graphene supported porous cobalt molybdenum oxynitride nanodendrites for the oxygen reduction reaction

Nanoscale ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 1205-1216 ◽  
Author(s):  
Kamaldeep Sharma ◽  
David Hui ◽  
Nam Hoon Kim ◽  
Joong Hee Lee
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Electrochemical Stability ◽  
Facile Synthesis ◽  
Doped Graphene ◽  
Orr Activity

Herein, the porous Co–Mo-ON/NG alloy nanodendrites offer comparable ORR activity, superior electrochemical stability, long term durability for 2000 cycles with almost zero degradation and greater resistance to methanol compared to commercial Pt/C catalysts both in acidic and basic media.

A Facile Synthesis of Nitrogen/Sulfur Co-Doped Graphene for the Oxygen Reduction Reaction

ChemCatChem ◽  
2015 ◽  
Vol 8 (1) ◽  
pp. 163-170 ◽  
Author(s):  
Fuping Pan ◽  
Youxin Duan ◽  
Xinkai Zhang ◽  
Junyan Zhang
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Facile Synthesis ◽  
Doped Graphene ◽  
Co Doped

Facile synthesis of cobalt and nitrogen co-doped graphene networks from polyaniline for oxygen reduction reaction in acidic solutions

2016 ◽  
Vol 4 (10) ◽  
pp. 3678-3682 ◽  
Author(s):  
Shuqin Peng ◽  
Hongmei Jiang ◽  
Youming Zhang ◽  
Lu Yang ◽  
Shuqin Wang ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
High Oxygen ◽  
Facile Synthesis ◽  
Acidic Solutions ◽  
Polyaniline Nanofibers ◽  
Reduction Activity ◽  
Doped Graphene ◽  
Co Doped

Co and N co-doped graphene networks derived from polyaniline nanofibers can show high oxygen reduction activity in acidic solutions.

scholarly journals Unveiling the Degradation Nature of Pt/NbOx/C Catalysts for Oxygen Reduction Reaction via in situ X-ray Absorption Spectroscopy

2021 ◽  
Author(s):  
Ershuai Liu ◽  
Qingying Jia ◽  
Jun Yang ◽  
Kai Sun ◽  
Li Jiao ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Absorption Spectroscopy ◽  
Reduction Reaction ◽  
X Ray ◽  
Orr Activity ◽  
X Ray Absorption

Among various metal nanoparticles supported on metal oxide (MMO) catalysts, the Pt/NbOx/C system has promising oxygen reduction reaction (ORR) activity as cathode for proton exchange membrane fuel cells (PEMFCs). Herein, we study a series of Pt/NbOx/C catalysts with tunable structural and electronic properties via physical vapor deposition and unravel the nature of metal and metal oxide interaction (MMOI) by characterizing this system under reactive conditions. By conducting in situ X-ray absorption spectroscopy (XAS) experiments, we demonstrate the Pt preferably interacts with O but not Nb in the Pt/NbOx/C system and such Pt-O interaction benefits the ORR activity via electronic effect rather than strain effect. We also provide clear evidence for the formation of metallic Nb phase at the early stage of PEMFC operation and identify severe particle growth of Pt after long-term PEMFC operation. These findings deepen our understanding of the degradation mechanism of MMO catalysts during long-term PEMFC operation.

Wet-chemical nitrogen-doping of graphene nanoplatelets as electrocatalysts for the oxygen reduction reaction

2015 ◽  
Vol 3 (14) ◽  
pp. 7659-7665 ◽  
Author(s):  
Dong Wook Chang ◽  
Hyun-Jung Choi ◽  
Jong-Beom Baek
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Graphene Nanoplatelets ◽  
Good Tolerance ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
Wet Chemical ◽  
Pyridinic N

We developed a facile, versatile method to prepare pyridinic N-rich nitrogen-doped graphene nanoplatelets (PN-GNs), which show unique electrocatalytic activities toward the oxygen reduction reaction with enhanced long-term cycle stability and good tolerance to methanol crossover.

Alloy-composition-dependent oxygen reduction reaction activity and electrochemical stability of Pt-based bimetallic systems: a model electrocatalyst study of Pt/PtxNi100−x(111)

2018 ◽  
Vol 20 (17) ◽  
pp. 11994-12004 ◽  
Author(s):  
Naoto Todoroki ◽  
Ryutaro Kawamura ◽  
Masato Asano ◽  
Ren Sasakawa ◽  
Shuntaro Takahashi ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Alloy Composition ◽  
Reduction Reaction ◽  
Electrochemical Stability ◽  
Oxygen Reduction Reaction Activity ◽  
Bimetallic Systems ◽  
Orr Activity

The oxygen reduction reaction (ORR) activity and electrochemical stability of well-defined n monolayer (ML)-Pt/PtxNi100−x(111) (n = 2 and 4; x = 75, 50, and 25) model electrocatalyst surfaces were investigated in this study.

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