scholarly journals The effect of surface modification by reduced graphene oxide on the electrocatalytic activity of nickel towards the hydrogen evolution reaction

2015 ◽  
Vol 17 (40) ◽  
pp. 26864-26874 ◽  
Author(s):  
Debabrata Chanda ◽  
Jaromír Hnát ◽  
Ana S. Dobrota ◽  
Igor A. Pašti ◽  
Martin Paidar ◽  
...  
Keyword(s):  
Surface Modification ◽  
Graphene Oxide ◽  
Dft Calculations ◽  
Reduced Graphene Oxide ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Electrocatalytic Activity ◽  
Active Sites ◽  
Reduced Graphene ◽  
Effect Of Surface

The RGO-modified Ni electrode exhibited outstanding activity towards HER. DFT calculations indicate that H atoms, formed upon H2O discharge on Ni, spill onto the RGO, enabling continuous clearance of Ni-active sites.

scholarly journals Effect of Ag2S Nanocrystals/Reduced Graphene Oxide Interface on Hydrogen Evolution Reaction

Catalysts ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 948
Author(s):  
Chen Zhao ◽  
Zhi Yu ◽  
Jun Xing ◽  
Yuting Zou ◽  
Huiwen Liu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Active Sites ◽  
Fossil Fuels ◽  
Composite Catalyst ◽  
Oxide Interface ◽  
Electrochemical Catalyst ◽  
Reduced Graphene

The development of efficient electrocatalyst to produce molecular hydrogen from water is receiving considerable attention, in an effort to decrease our reliance on fossil fuels. The prevention of the aggregation of active sites during material synthesis, in order to increase charge transport properties of electrocatalysts, is needed. We have designed, synthesized, and studied a Ag2S/reduced graphene oxide (rGO) electrochemical catalyst (for hydrogen evolution) from water. The Ag2S nanocrystals were synthesized by the solvothermal method in which the rGO was added. The addition of the rGO resulted in the formation of smaller Ag2S nanocrystals, which consequently increased the electrical conductivity of the composite catalyst. The composite catalyst showed a higher electrochemical catalytic activity than the one with an absence of rGO. At a current density of 10 mA/cm2, a low overpotential of 120 mV was obtained. A Tafel slope of 49.1 mV/dec suggests a Volmer–Herovsky mechanism for the composite catalyst. These results may provide a novel strategy for developing hydrogen evolution reaction (HER) electrocatalysts, via the combining of a nano-semiconductor catalyst with a 2D material.

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.

CoP nanoparticles deposited on reduced graphene oxide sheets as an active electrocatalyst for the hydrogen evolution reaction

2015 ◽  
Vol 3 (10) ◽  
pp. 5337-5343 ◽  
Author(s):  
Lianbo Ma ◽  
Xiaoping Shen ◽  
Hu Zhou ◽  
Guoxing Zhu ◽  
Zhenyuan Ji ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Electrocatalytic Activity ◽  
Reduced Graphene ◽  
Graphene Oxide Sheets

A novel CoP/RGO composite with excellent electrocatalytic activity towards HER was prepared using a facile two-step strategy.

Solution-processed MoS2nanotubes/reduced graphene oxide nanocomposite as an active electrocatalyst toward the hydrogen evolution reaction

RSC Advances ◽  
2016 ◽  
Vol 6 (75) ◽  
pp. 70740-70746 ◽  
Author(s):  
Long Song ◽  
Mengjia Zhao ◽  
Xiaoxue Li ◽  
Zhipan Zhang ◽  
Liangti Qu
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Electrocatalytic Activity ◽  
Solution Processed ◽  
Good Electrocatalytic Activity ◽  
Reduced Graphene ◽  
Surfactant Assisted ◽  
3D Nanostructure

A hierarchical 3D nanostructure of MoS2nanotubes supported on a reduced graphene oxide network is prepared through a surfactant-assisted lyophilization process and it exhibits good electrocatalytic activity in the hydrogen evolution reaction.

MOFs-derived ruthenium-doped amorphous molybdenum dioxide hybrid for highly efficient hydrogen evolution reaction in alkaline media

2021 ◽  
Author(s):  
Ji-Yuan Han ◽  
Sheng-Hao Cai ◽  
Ji-Yu Zhu ◽  
Shuang Yang ◽  
Ji-Sen Li
Keyword(s):  
Graphene Oxide ◽  
Synergistic Effect ◽  
Reduced Graphene Oxide ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Active Sites ◽  
Alkaline Media ◽  
Molybdenum Dioxide ◽  
Highly Efficient ◽  
Reduced Graphene

Ruthenium-doped amorphous molybdenum dioxide coupled with reduced graphene oxide hybrid (Ru-MoO2@PC/rGO) is synthesized using POMOF/GO as precursor. Benefitting from the synergistic effect of numerous exposed active sites, Ru dopants, and...

Co3ZnC core–shell nanoparticle assembled microspheres/reduced graphene oxide as an advanced electrocatalyst for hydrogen evolution reaction in an acidic solution

2015 ◽  
Vol 3 (20) ◽  
pp. 11066-11073 ◽  
Author(s):  
Lianbo Ma ◽  
Xiaoping Shen ◽  
Jun Zhu ◽  
Guoxing Zhu ◽  
Zhenyuan Ji
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Electrocatalytic Activity ◽  
Acidic Solution ◽  
Core Shell ◽  
Reduced Graphene

A novel Co3ZnC/RGO composite with excellent electrocatalytic activity toward HER was prepared through an effective two-step strategy.

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