Fabrication of functionalized 3D graphene with controllable micro/meso-pores as a superior electrocatalyst for enhanced oxygen reduction in both acidic and alkaline solutions

RSC Advances ◽  
2016 ◽  
Vol 6 (83) ◽  
pp. 79459-79469 ◽  
Author(s):  
Yue Guan ◽  
Zhiyu Dou ◽  
Yan Yang ◽  
Juanhong Xue ◽  
Zhen Zhu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Reduction ◽  
Alkaline Media ◽  
Alkaline Solutions ◽  
3D Graphene ◽  
Doped Graphene ◽  
Acidic And Alkaline Media

We have synthesized hierarchically 3D porous Fe5C2/N-doped graphene (3D Fe5C2/N-PG) with numerous micro/meso-pores by a controllable and facile strategy. The catalyst displays excellent catalytic activity for ORR in both acidic and alkaline media.

Nitrogen-doped 3D porous carbons with iron carbide nanoparticles encapsulated in graphitic layers derived from functionalized MOF as an efficient noble-metal-free oxygen reduction electrocatalysts in both acidic and alkaline media

RSC Advances ◽  
2016 ◽  
Vol 6 (112) ◽  
pp. 110820-110830 ◽  
Author(s):  
Juanhong Xue ◽  
Ling Zhao ◽  
Zhiyu Dou ◽  
Yan Yang ◽  
Yue Guan ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Noble Metal ◽  
Iron Carbide ◽  
Alkaline Media ◽  
Alkaline Solutions ◽  
Porous Carbons ◽  
Free Oxygen ◽  
Nitrogen Doped ◽  
Metal Free ◽  
Acidic And Alkaline Media

Functionalized 3D porous carbons comprising encased iron carbide species, derived from a MOF, display outstanding ORR performance in both acidic and alkaline solutions.

Coralline-like CoP3@Cu as an efficient electrocatalyst for the hydrogen evolution reaction in acidic and alkaline solutions

2020 ◽  
Vol 44 (43) ◽  
pp. 18601-18607 ◽  
Author(s):  
Mengyu Hou ◽  
Ying Xu ◽  
Xi Li ◽  
Yongzhi Dong ◽  
Fengke Sun ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Alkaline Media ◽  
Alkaline Solutions ◽  
Acidic And Alkaline Media

CoP3@Cu/Cu exhibited excellent catalytic activity and stability in acidic and alkaline media.

scholarly journals Superior FexN electrocatalyst derived from 1,1′-diacetylferrocene for oxygen reduction reaction in alkaline and acidic media

2020 ◽  
Vol 9 (1) ◽  
pp. 843-852
Author(s):  
Hunan Jiang ◽  
Jinyang Li ◽  
Mengni Liang ◽  
Hanpeng Deng ◽  
Zuowan Zhou
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Current Density ◽  
Active Sites ◽  
Reduction Reaction ◽  
Alkaline Media ◽  
Acidic Media ◽  
Onset Potential ◽  
Acidic And Alkaline Media ◽  
The Stability

AbstractAlthough Fe–N/C catalysts have received increasing attention in recent years for oxygen reduction reaction (ORR), it is still challenging to precisely control the active sites during the preparation. Herein, we report FexN@RGO catalysts with the size of 2–6 nm derived from the pyrolysis of graphene oxide and 1,1′-diacetylferrocene as C and Fe precursors under the NH3/Ar atmosphere as N source. The 1,1′-diacetylferrocene transforms to Fe3O4 at 600°C and transforms to Fe3N and Fe2N at 700°C and 800°C, respectively. The as-prepared FexN@RGO catalysts exhibited superior electrocatalytic activities in acidic and alkaline media compared with the commercial 10% Pt/C, in terms of electrochemical surface area, onset potential, half-wave potential, number of electrons transferred, kinetic current density, and exchange current density. In addition, the stability of FGN-8 also outperformed commercial 10% Pt/C after 10000 cycles, which demonstrates the as-prepared FexN@RGO as durable and active ORR catalysts in acidic media.

Highly active Fe–N-doped porous hollow carbon nanospheres as oxygen reduction electrocatalysts in both acidic and alkaline media

Nanoscale ◽  
2020 ◽  
Vol 12 (28) ◽  
pp. 15115-15127 ◽  
Author(s):  
Meng-geng Hao ◽  
Rong-min Dun ◽  
Yu-miao Su ◽  
Wen-mu Li
Keyword(s):  
Oxygen Reduction ◽  
Nitrogen Sources ◽  
Alkaline Media ◽  
Carbon Nanospheres ◽  
Highly Active ◽  
Acidic And Alkaline Media ◽  
Hollow Carbon ◽  
Soft Templates

MF nanospheres decomposed into NH3 and CO2 as soft templates, nitrogen sources and pore-forming agents.

Experimental and theoretical investigation on MoS2/MXene heterostructure as an efficient electrocatalyst for hydrogen evolution in both acidic and alkaline media

2020 ◽  
Vol 44 (19) ◽  
pp. 7902-7911
Author(s):  
Le Hu ◽  
Yuyun Sun ◽  
Shi-Jing Gong ◽  
Hui Zong ◽  
Ke Yu ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Theoretical Investigation ◽  
Alkaline Media ◽  
Alkaline Solutions ◽  
Acidic And Alkaline Media

A composite of MoS2/Nb2CTx with MoS2 nanoflowers grown between Nb2CTx flakes for electrolysis of water in acidic and alkaline solutions.

Ni3[Fe(CN)6]2 nanocubes boost the catalytic activity of Pt for electrochemical hydrogen evolution

2018 ◽  
Vol 5 (7) ◽  
pp. 1683-1689 ◽  
Author(s):  
Xiao Zhang ◽  
Pei Liu ◽  
Yanfang Sun ◽  
Tianrong Zhan ◽  
Qingyun Liu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Reaction Kinetics ◽  
Hydrogen Evolution ◽  
Alkaline Media ◽  
Water Dissociation ◽  
Acidic And Alkaline Media ◽  
Ni Species ◽  
Low Pt Loading ◽  
Kinetics Of

Hybrid electrocatalyst of ultrafine Pt particles anchored on a Ni3[Fe(CN)6]2 nanocube with low Pt loading of 4.0% is designed for HERs, and superior catalytic activity is obtained in both acidic and alkaline media because the Ni species remarkably facilitates the reaction kinetics of water dissociation and thus improves HER activity.

Co3O4 Nanoparticles-Modified α-MnO2 Nanorods Supported on Reduced Graphene Oxide as Cathode Catalyst for Oxygen Reduction Reaction in Alkaline Media

NANO ◽  
2016 ◽  
Vol 11 (11) ◽  
pp. 1650126 ◽  
Author(s):  
GuanHua Jin ◽  
Suqin Liu ◽  
Yaomin Li ◽  
Yang Guo ◽  
Zhiying Ding
Keyword(s):  
Electron Microscopy ◽  
Graphene Oxide ◽  
Catalytic Activity ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduced Graphene Oxide ◽  
Reduction Reaction ◽  
Alkaline Media ◽  
X Ray ◽  
Reduced Graphene

Development of efficient electrocatalysts for the oxygen reduction reaction (ORR) remains a key issue for the commercialization of metal-air batteries. In this study, the novel structured Co3O4 nanoparticles-modified [Formula: see text]-MnO2 nanorods supported on reduced graphene oxide (Co3O4-MnO2/rGO) were synthesized with varying amounts of [Formula: see text]-MnO2 via a facile two-step hydrothermal method. The relationship between the physical properties and the electrochemical results was investigated using X-ray diffraction spectrum, scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, cyclic voltammograms, electrochemical impedance spectroscopy and rotating disk electrode. The as-prepared Co3O4–MnO2 nanohybrid exhibits enhanced catalytic activity for ORR under alkaline condition compared with MnO2/rGO and Co3O4/rGO. Furthermore, it mainly favors a direct 4e-reaction pathway for ORR, which is attributed to the well-designed structure, the synergistic effect between Co3O4 and [Formula: see text]-MnO2, and the covalent coupling between the Co3O4-MnO2 and reduced graphene oxide. The role of Co3O4 in Co3O4–MnO2 hybrid for catalyzing ORR also has been illustrated by varying the mass ratio of Co3O4 and MnO2, which reveals that the Co3O4–MnO2 with the ratio of 1:1 has better catalytic activity.

Palladium copper nanosponges for electrocatalytic reduction of oxygen and glucose detection

2015 ◽  
Vol 3 (18) ◽  
pp. 9675-9681 ◽  
Author(s):  
Wen-Ping Wu ◽  
Arun Prakash Periasamy ◽  
Guan-Lin Lin ◽  
Zih-Yu Shih ◽  
Huan-Tsung Chang
Keyword(s):  
Catalytic Activity ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Alkaline Media ◽  
High Catalytic Activity ◽  
Glucose Detection ◽  
Cathode Catalyst ◽  
Electrocatalytic Reduction ◽  
One Pot

One-pot synthesized PdCu nanosponges (NSs) are separately used as a cathode catalyst for the oxygen reduction reaction in alkaline media and for enzymeless detection of glucose with high catalytic activity, stability, and durability.

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