An ultrafine platinum–cobalt alloy decorated cobalt nanowire array with superb activity toward alkaline hydrogen evolution

Nanoscale ◽  
2018 ◽  
Vol 10 (26) ◽  
pp. 12302-12307 ◽  
Author(s):  
Ziqiang Wang ◽  
Xiang Ren ◽  
Yonglan Luo ◽  
Liang Wang ◽  
Guanwei Cui ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Current Density ◽  
Nanowire Array ◽  
Cobalt Alloy ◽  
Co Nanowires ◽  
Ti Mesh

Ultrafine PtCo nanoparticles decorated Co nanowires on Ti mesh deliver an ultrahigh current density of 46.5 mA cm−2 at an overpotential of 70 mV in 1.0 M KOH.

Robust electrocatalysts from an alloyed Pt–Ru–M (M = Cr, Fe, Co, Ni, Mo)-decorated Ti mesh for hydrogen evolution by seawater splitting

2016 ◽  
Vol 4 (17) ◽  
pp. 6513-6520 ◽  
Author(s):  
Hongyan Li ◽  
Qunwei Tang ◽  
Benlin He ◽  
Peizhi Yang
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Current Density ◽  
Cost Effective ◽  
Hydrogen Energy ◽  
Ti Mesh

A prerequisite for creating green hydrogen energy is to develop cost-effective electrocatalysts with reduced overpotentials, increased current density, and therefore enhanced catalytic activity toward water splitting.

Cobalt–borate nanowire array as a high-performance catalyst for oxygen evolution reaction in near-neutral media

2017 ◽  
Vol 5 (16) ◽  
pp. 7291-7294 ◽  
Author(s):  
Xiang Ren ◽  
Ruixiang Ge ◽  
Yong Zhang ◽  
Danni Liu ◽  
Dan Wu ◽  
...  
Keyword(s):  
High Activity ◽  
Oxygen Evolution ◽  
Current Density ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
High Performance ◽  
Nanowire Array ◽  
Catalytic Current ◽  
Neutral Media ◽  
Ti Mesh

As a durable catalyst, cobalt–borate nanowire array on Ti mesh exhibits high activity for water oxidation in near-neutral media, thereby achieving a geometrical catalytic current density of 10 mA cm−2 at an overpotential of 420 mV.

A 3D porous Ni-CeO2 nanosheet array as a highly efficient electrocatalyst toward alkaline hydrogen evolution

2018 ◽  
Vol 47 (36) ◽  
pp. 12667-12670 ◽  
Author(s):  
Zhaomei Sun ◽  
Jiayu Zhang ◽  
Junfeng Xie ◽  
Min Wang ◽  
Xiangjiang Zheng ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Current Density ◽  
Highly Efficient ◽  
Nanosheet Array ◽  
A Current ◽  
Ti Mesh

A 3D porous Ni-CeO2 nanosheet array supported on a Ti mesh (Ni-CeO2/TM) behaves as an efficient and stable alkaline HER electrocatalyst, offering a current density of 10 mA cm−2 at an overpotential of 67 mV.

A highly stable CoMo2S4/Ni3S2 heterojunction electrocatalyst for efficient hydrogen evolution

2021 ◽  
Author(s):  
Minmin Wang ◽  
Mengke Zhang ◽  
Wenwu Song ◽  
Weiting Zhong ◽  
Xunyue Wang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Current Density ◽  
A Current

A CoMo2S4/Ni3S2 heterojunction is prepared with an overpotential of only 51 mV to drive a current density of 10 mA cm−2 in 1 M KOH solution and ∼100% of the potential remains in the ∼50 h chronopotentiometric curve at 10 mA cm−2.

Electrodeposited rhenium–cobalt alloy with high activity for acidic hydrogen evolution reaction

2021 ◽  
Vol 95 ◽  
pp. 357-366
Author(s):  
Hyunki Kim ◽  
Junhyeong Kim ◽  
Gyeong Ho Han ◽  
Wenwu Guo ◽  
Seokjin Hong ◽  
...  
Keyword(s):  
High Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Cobalt Alloy ◽  
Acidic Hydrogen

scholarly journals Microwave-Assisted vs. Conventional Hydrothermal Synthesis of MoS2 Nanosheets: Application towards Hydrogen Evolution Reaction

Crystals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1040 ◽  
Author(s):  
Getachew Solomon ◽  
Raffaello Mazzaro ◽  
Vittorio Morandi ◽  
Isabella Concina ◽  
Alberto Vomiero
Keyword(s):  
Hydrothermal Synthesis ◽  
Hydrothermal Method ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Current Density ◽  
Crystal Morphology ◽  
Synthesis Method ◽  
Synthesis Methods ◽  
Mos2 Nanosheets ◽  
Microwave Assisted

Molybdenum sulfide (MoS2) has emerged as a promising catalyst for hydrogen evolution applications. The synthesis method mainly employed is a conventional hydrothermal method. This method requires a longer time compared to other methods such as microwave synthesis methods. There is a lack of comparison of the two synthesis methods in terms of crystal morphology and its electrochemical activities. In this work, MoS2 nanosheets are synthesized using both hydrothermal (HT-MoS2) and advanced microwave methods (MW-MoS2), their crystal morphology, and catalytical efficiency towards hydrogen evolution reaction (HER) were compared. MoS2 nanosheet is obtained using microwave-assisted synthesis in a very short time (30 min) compared to the 24 h hydrothermal synthesis method. Both methods produce thin and aggregated nanosheets. However, the nanosheets synthesized by the microwave method have a less crumpled structure and smoother edges compared to the hydrothermal method. The as-prepared nanosheets are tested and used as a catalyst for hydrogen evolution results in nearly similar electrocatalytic performance. Experimental results showed that: HT-MoS2 displays a current density of 10 mA/cm2 at overpotential (−280 mV) compared to MW-MoS2 which requires −320 mV to produce a similar current density, suggesting that the HT-MoS2 more active towards hydrogen evolutions reaction.

scholarly journals Solar-driven hydrogen evolution using a CuInS2/CdS/ZnO heterostructure nanowire array as an efficient photoanode

Nanoscale ◽  
2014 ◽  
Vol 6 (15) ◽  
pp. 8914 ◽  
Author(s):  
Youngwoo Choi ◽  
Minki Beak ◽  
Kijung Yong
Keyword(s):  
Hydrogen Evolution ◽  
Nanowire Array

The passivity and overvoltage during hydrogen evolution and indium deposition of metallic indium

1977 ◽  
Vol 55 (10) ◽  
pp. 1710-1712 ◽  
Author(s):  
Alan N. Campbell
Keyword(s):  
Hydrogen Evolution ◽  
Current Density ◽  
Normal Manner ◽  
Tentative Explanation

The passivity and overvoltage during hydrogen evolution and indium deposition of metallic indium have been determined. Although the overvoltage to hydrogen evolution is fairly high and increases with current density in the normal manner, passivity to the solution of indium ions is almost completely absent, in contradistinction to aluminum, whose anodic passivity is complete. A tentative explanation is offered.

Sign in / Sign up

Export Citation Format

Share Document