Dual-doping of ruthenium and nickel into Co3O4 for improving the oxygen evolution activity

2020 ◽  
Vol 4 (5) ◽  
pp. 1390-1396 ◽  
Author(s):  
Beibei Guo ◽  
Ruguang Ma ◽  
Zichuang Li ◽  
Jun Luo ◽  
Minghui Yang ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Oxygen Evolution ◽  
Active Sites ◽  
Oxygen Vacancies ◽  
Intrinsic Activity ◽  
Ni Doping ◽  
One Step ◽  
Ru Doping ◽  
Co Doped

Ru and Ni co-doped Co3O4 with improved OER activity were synthesized by a one-step hydrothermal method. Ru doping increases the intrinsic activity, while Ni doping creates more oxygen vacancies and exposes more active sites.

A mild reduction of Co-doped MnO2 to create abundant oxygen vacancies and active sites for enhanced Oxygen Evolution Reaction

Nanoscale ◽  
2021 ◽  
Author(s):  
Jincan Jia ◽  
Lei Li ◽  
Xiao Lian ◽  
Mingzai Wu ◽  
Fangcai Zheng ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Precious Metal ◽  
Active Sites ◽  
Oxygen Vacancies ◽  
Mild Reduction ◽  
Huge Challenge ◽  
Co Doped

Efficient and non-precious metal-based catalysts (e.g., manganese-based oxides) for the oxygen evolution reaction (OER) still remains a huge challenge. It is rarely reported to create the oxygen vacancies of manganese-based...

scholarly journals Intrinsic activity modulation and structural design of NiFe alloy catalysts for an efficient oxygen evolution reaction

2021 ◽  
Author(s):  
Qiaoling Kang ◽  
Dawei Lai ◽  
Wenyin Tang ◽  
Qingyi Lu ◽  
Feng Gao
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Structural Design ◽  
Active Sites ◽  
Intrinsic Activity ◽  
Effective Strategies ◽  
Alloy Catalysts

Effective strategies to increase the intrinsic activity by electronic modulation and to increase the number of active sites by structural design are discussed for improving the oxygen evolution activities of NiFe alloys.

scholarly journals Mononuclear Fe in N-doped carbon: computational elucidation of active sites for electrochemical oxygen reduction and oxygen evolution reactions

2020 ◽  
Vol 10 (4) ◽  
pp. 1006-1014 ◽  
Author(s):  
Rui Shang ◽  
Stephan N. Steinmann ◽  
Bo-Qing Xu ◽  
Philippe Sautet
Keyword(s):  
Oxygen Reduction ◽  
Oxygen Evolution ◽  
Electrostatic Potential ◽  
First Principles ◽  
Active Sites ◽  
High Potential ◽  
Major Influence ◽  
Co Doped ◽  
Electrochemical Oxygen

First principles simulations show that in Fe and N co-doped carbon, Fe coordination controls the activity for oxygen reduction and oxygen evolution reactions, and that including the electrostatic potential has a major influence at high potential.

Oxygen vacancy-confined CoMoO4@CoNiO2 nanorod arrays for oxygen evolution with improved performance

2019 ◽  
Vol 48 (27) ◽  
pp. 10116-10121 ◽  
Author(s):  
Xiaoqiang Du ◽  
Guangyu Ma ◽  
Xiaoshuang Zhang
Keyword(s):  
Oxygen Vacancy ◽  
Oxygen Evolution ◽  
Adsorption Energy ◽  
Active Sites ◽  
Oxygen Vacancies ◽  
Dft Calculation ◽  
Catalytic Properties ◽  
Nanorod Arrays ◽  
Calculation Results ◽  
Improved Performance

Experimental and DFT calculation results show that the presence of oxygen vacancies can decrease the adsorption energy of intermediates at active sites and facilitate the adsorption of intermediates, thus improving the catalytic properties.

Biomass-derived C/N co-doped Ni(OH)2/NixSy with a sandwich structure for supercapacitors

2018 ◽  
Vol 6 (36) ◽  
pp. 17417-17425 ◽  
Author(s):  
Yue Zhang ◽  
Lei Yu ◽  
Rudan Hu ◽  
Jianli Zhang ◽  
Yining Wang ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Sandwich Structure ◽  
Cycling Stability ◽  
One Step ◽  
Excellent Cycling Stability ◽  
Co Doped

C/N co-doped Ni(OH)2/NixSy with a sandwich structure was designed via a simple one-step hydrothermal method for supercapacitors with excellent cycling stability.

Preparation of Fe/N Co-Doped TiO2 Powders by Mild Hydrothermal Method

2014 ◽  
Vol 804 ◽  
pp. 217-220 ◽  
Author(s):  
Jun Na Xu ◽  
Wen Xiu Liu ◽  
Peng Sun ◽  
Ming Guan ◽  
Wen Bin Cao
Keyword(s):  
Grain Size ◽  
Visible Light ◽  
Hydrothermal Method ◽  
Visible Light Irradiation ◽  
Light Absorption ◽  
Visible Light Region ◽  
Light Region ◽  
One Step ◽  
Lower Temperature ◽  
Co Doped

Yellow colored anatase Fe/N co-doped TiO2powders have been successfully synthesized by one step hydrothermal method at a lower temperature. The grain size was about 10 nm and the specific surface area of the powders ranged from 160 to 166 m2/g. The light absorption of Fe/N co-doped TiO2powders was enhanced in the visible light region of 400~500 nm and a new absorption peak at about 470 nm appeared when the Fe/Ti ratio exceeded 0.5%. The visible light photoactivity of Fe/N co-doped TiO2powders has been greatly improved than that of un-doped TiO2powders under visible light irradiation.

scholarly journals One-step hydrothermal synthesis of NiS/MoS2-rGO composites and their application as catalysts for hydrogen evolution reaction

2016 ◽  
Vol 09 (05) ◽  
pp. 1650058 ◽  
Author(s):  
Huaping Wu ◽  
Ye Qiu ◽  
Junma Zhang ◽  
Guozhong Chai ◽  
Congda Lu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Hydrothermal Synthesis ◽  
Hydrothermal Method ◽  
Reduced Graphene Oxide ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Active Sites ◽  
Layer Structures ◽  
Reduced Graphene ◽  
One Step

The composites of sulphide and reduced graphene oxide (NiS/MoS2-rGO) were synthesized through a facile solvent-assisted hydrothermal method. The introduction of NiS was paramount not only in enhancing the conductivity of whole catalysts but also in modulating the layer structures of MoS2 with additional active sites. Moreover, the NiS and rGO functioned together in controlling the morphology of as-prepared composites, resulting in uniformly distributed NiS/MoS2 nanosheets perpendicular to rGO scaffold. This further contributed to the excellent hydrogen evolution performance of the composites with a small onset overpotential of 80[Formula: see text]mV and Tafel slope as low as 65[Formula: see text]mV/decade.

Uniformly self-decorated Co3O4 nanoparticles on N, S co-doped carbon layers derived from a camphor sulfonic acid and metal–organic framework hybrid as an oxygen evolution electrocatalyst

2018 ◽  
Vol 6 (25) ◽  
pp. 12106-12114 ◽  
Author(s):  
Mohd. Khalid ◽  
Ana M. B. Honorato ◽  
Edson A. Ticianelli ◽  
Hamilton Varela
Keyword(s):  
Oxygen Evolution ◽  
Sulfonic Acid ◽  
Metal Organic Framework ◽  
Co3o4 Nanoparticles ◽  
Camphor Sulfonic Acid ◽  
Metal Organic ◽  
One Step ◽  
Co Doped ◽  
Organic Framework

A simple one step preparation of Co3O4 nanoparticle decorated carbon from a camphor sulfonic acid and metal–organic framework hybrid.

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