Self-supported three-dimensional Cu/Cu2O–CuO/rGO nanowire array electrodes for an efficient hydrogen evolution reaction

2018 ◽  
Vol 54 (49) ◽  
pp. 6388-6391 ◽  
Author(s):  
Lin Ye ◽  
Zhenhai Wen
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Nanowire Array ◽  
Three Dimensional ◽  
Nanowire Arrays ◽  
Onset Potential ◽  
Highly Efficient ◽  
Low Overpotential

Cu/Cu2O–CuO/rGO nanowire arrays was fabricated as a highly efficient HER catalyst with a small onset potential and low overpotential.

scholarly journals WS(1−x)Sex Nanoparticles Decorated Three-Dimensional Graphene on Nickel Foam: A Robust and Highly Efficient Electrocatalyst for the Hydrogen Evolution Reaction

Nanomaterials ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 929 ◽  
Author(s):  
Sajjad Hussain ◽  
Kamran Akbar ◽  
Dhanasekaran Vikraman ◽  
Rana Afzal ◽  
Wooseok Song ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Large Scale ◽  
Nickel Foam ◽  
Transition Metal Dichalcogenides ◽  
Three Dimensional ◽  
Cost Effective ◽  
Highly Efficient ◽  
Highly Active ◽  
Earth Abundant

To find an effective alternative to scarce, high-cost noble platinum (Pt) electrocatalyst for hydrogen evolution reaction (HER), researchers are pursuing inexpensive and highly efficient materials as an electrocatalyst for large scale practical application. Layered transition metal dichalcogenides (TMDCs) are promising candidates for durable HER catalysts due to their cost-effective, highly active edges and Earth-abundant elements to replace Pt electrocatalysts. Herein, we design an active, stable earth-abundant TMDCs based catalyst, WS(1−x)Sex nanoparticles-decorated onto a 3D porous graphene/Ni foam. The WS(1−x)Sex/graphene/NF catalyst exhibits fast hydrogen evolution kinetics with a moderate overpotential of ~−93 mV to drive a current density of 10 mA cm−2, a small Tafel slope of ~51 mV dec−1, and a long cycling lifespan more than 20 h in 0.5 M sulfuric acid, which is much better than WS2/NF and WS2/graphene/NF catalysts. Our outcomes enabled a way to utilize the TMDCs decorated graphene and precious-metal-free electrocatalyst as mechanically robust and electrically conductive catalyst materials.

Hydrothermal Synthesis of NiCo2O4 Nanowires on Carbon Fiber Paper for Hydrogen Evolution Catalyst

2018 ◽  
Vol 775 ◽  
pp. 139-143 ◽  
Author(s):  
Luigi A. Dahonog ◽  
Mary Donnabelle L. Balela
Keyword(s):  
Hydrothermal Synthesis ◽  
Carbon Fiber ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Nanowire Arrays ◽  
Hydrothermal Time ◽  
Cathodic Current ◽  
Onset Potential ◽  
Nickel Cobaltite ◽  
Carbon Fiber Paper

Nickel cobaltite (NiCo2O4) nanowires were successfully grown on the surface of carbon fiber via hydrothermal treatment, followed by annealing. After 2 h, SEM revealed the formation of NiCo2O4 nanowire arrays on the surface of the carbon fiber paper. With increasing hydrothermal time from 2 to 12 h, the NiCo2O4 nanowires also self-assembled into urchin-like morphologies. When used as catalysts for hydrogen evolution reaction, the NiCo2O4 nanowires exhibit an onset potential for the cathodic current at-0.13 V vs. Ag/AgCl in 0.1 M KOH.

The synergetic effect of graphene on Cu2O nanowire arrays as a highly efficient hydrogen evolution photocathode in water splitting

2014 ◽  
Vol 2 (43) ◽  
pp. 18383-18397 ◽  
Author(s):  
Amare Aregahegn Dubale ◽  
Wei-Nien Su ◽  
Andebet Gedamu Tamirat ◽  
Chun-Jern Pan ◽  
Belete Asefa Aragaw ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Nanowire Array ◽  
Synergetic Effect ◽  
Photocurrent Density ◽  
Nanowire Arrays ◽  
Highly Efficient

The graphene modified Cu2O nanowire array demonstrates improved photocurrent density and photostability, attributed to the synergetic effect of graphene.

scholarly journals Catalysis: NiMo Solid Solution Nanowire Array Electrodes for Highly Efficient Hydrogen Evolution Reaction (Adv. Funct. Mater. 44/2019)

2019 ◽  
Vol 29 (44) ◽  
pp. 1970308
Author(s):  
Adeela Nairan ◽  
Peichao Zou ◽  
Caiwu Liang ◽  
Jiaxing Liu ◽  
Dang Wu ◽  
...  
Keyword(s):  
Solid Solution ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Nanowire Array ◽  
Highly Efficient

Phosphorus-doped CoS2 nanosheet arrays as ultra-efficient electrocatalysts for the hydrogen evolution reaction

2015 ◽  
Vol 51 (75) ◽  
pp. 14160-14163 ◽  
Author(s):  
Canbin Ouyang ◽  
Xin Wang ◽  
Shuangyin Wang
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Tafel Slope ◽  
Onset Potential ◽  
Highly Efficient ◽  
Nanosheet Arrays ◽  
Catalytic Stability ◽  
Lower Temperature ◽  
Phosphorus Doped

P doped CoS2 nanosheet arrays were prepared by a two-step reaction at lower temperature. P doped CoS2, as a highly efficient HER catalyst, shows lower onset potential, smaller Tafel slope and better catalytic stability than pure CoS2.

Hierarchical Cu2S hollow nanowire arrays for highly efficient hydrogen evolution reaction

2021 ◽  
Author(s):  
Ning Xie ◽  
Dong-Dong Ma ◽  
Yu-Lin Wu ◽  
Xintao Wu ◽  
Qi-Long Zhu
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Low Cost ◽  
Nanowire Arrays ◽  
Highly Efficient ◽  
Highly Active ◽  
Earth Abundant

Exploiting the highly active and low-cost electrocatalysts based on earth-abundant elements for hydrogen evolution reaction (HER) is an extremely desired but challenging task. Herein, we present a facile and economical...

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