Graphitized carbon-coated vanadium carbide nanoboscages modified by nickel with enhanced electrocatalytic activity for hydrogen evolution in both acid and alkaline solutions

2017 ◽  
Vol 5 (44) ◽  
pp. 23028-23034 ◽  
Author(s):  
Lishan Peng ◽  
Jingjun Shen ◽  
Ling Zhang ◽  
Yao Wang ◽  
Rui Xiang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Electrocatalytic Activity ◽  
Carbon Coating ◽  
Vanadium Carbide ◽  
Three Dimensional ◽  
Graphitic Carbon ◽  
Alkaline Solutions ◽  
Graphitized Carbon ◽  
Highly Active ◽  
Carbon Coated

Three-dimensional Ni-modified VC nanoboscages with graphitic carbon coating structures were controllably synthesized as a highly active HER catalyst by inventively employing metallic Ni as a crystalline inducer.

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.

Enhanced electrocatalytic activity by chemical nitridation of two-dimensional titanium carbide MXene for hydrogen evolution

2018 ◽  
Vol 6 (42) ◽  
pp. 20869-20877 ◽  
Author(s):  
Yeoheung Yoon ◽  
Anand P. Tiwari ◽  
Minhe Lee ◽  
Min Choi ◽  
Wooseok Song ◽  
...  
Keyword(s):  
Titanium Carbide ◽  
Hydrogen Evolution ◽  
Electrocatalytic Activity ◽  
Two Dimensional ◽  
Highly Active ◽  
Sodium Amide

We report a strategy to turn non-electrocatalytic 2D-titanium carbide MXene (Ti2CTx) into a highly active electrocatalyst by nitridation with sodium amide (NaNH2).

Salt-assisted synthesis of 3D open porous g-C3N4 decorated with cyano groups for photocatalytic hydrogen evolution

Nanoscale ◽  
2018 ◽  
Vol 10 (6) ◽  
pp. 3008-3013 ◽  
Author(s):  
Zhangfa Chen ◽  
Shangchen Lu ◽  
Qianling Wu ◽  
Fang He ◽  
Naiqin Zhao ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Freeze Drying ◽  
Carbon Nitride ◽  
Three Dimensional ◽  
Porous Graphitic Carbon ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Step Process ◽  
Photocatalytic Hydrogen Evolution ◽  
Cyano Groups

Three-dimensional open porous graphitic carbon nitride with cyano groups (3D OPG-C3N4-CN) has been fabricated by a facile two-step process that combines NaCl-assisted freeze-drying with calcination.

N-doped carbon-coated cobalt nanorod arrays supported on a titanium mesh as highly active electrocatalysts for the hydrogen evolution reaction

2015 ◽  
Vol 3 (5) ◽  
pp. 1915-1919 ◽  
Author(s):  
Weijia Zhou ◽  
Yucheng Zhou ◽  
Linjing Yang ◽  
Jilin Huang ◽  
Yunting Ke ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Robust Stability ◽  
Hydrogen Evolution Reaction ◽  
Nanorod Arrays ◽  
Titanium Mesh ◽  
Tafel Slope ◽  
Highly Active ◽  
Carbon Coated ◽  
Ti Mesh

N-doped carbon-coated cobalt nanorod arrays on a Ti mesh exhibited efficient HER performance with an overpotential of −56 mV, a Tafel slope of 78.2 mV dec−1 and robust stability.

Inert V2O3 oxide promotes the electrocatalytic activity of Ni metal for alkaline hydrogen evolution

2019 ◽  
Vol 55 (22) ◽  
pp. 3290-3293 ◽  
Author(s):  
Dan Ji ◽  
Lishan Peng ◽  
Jingjun Shen ◽  
Mingming Deng ◽  
Zhanxin Mao ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Hydrogen Evolution ◽  
Electrocatalytic Activity ◽  
Metal Cations ◽  
Oxide Interfaces ◽  
Highly Active ◽  
Active Metal

Inert V2O3 oxide without reducible metal cations has been demonstrated to greatly promote the HER activity of Ni by creating highly active metal/oxide interfaces.

N-Carbon coated P-W2C composite as efficient electrocatalyst for hydrogen evolution reactions over the whole pH range

2017 ◽  
Vol 5 (2) ◽  
pp. 765-772 ◽  
Author(s):  
Gang Yan ◽  
Caixia Wu ◽  
Huaqiao Tan ◽  
Xiaojia Feng ◽  
Likai Yan ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Electrocatalytic Activity ◽  
Carbon Coated ◽  
Hydrogen Evolution Reactions ◽  
Ph Range

A N-carbon coated P-modified W2C composite (P-W2C@NC), prepared by annealing a mixture of H3PW12O40and dicyandiamide, exhibits excellent HER electrocatalytic activity and durability over the whole pH range.

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