The Co2+/Ni2+ ion-mediated formation of a topochemically converted copper coordination polymer: structure-dependent electrocatalytic activity

CrystEngComm ◽  
2019 ◽  
Vol 21 (43) ◽  
pp. 6552-6557 ◽  
Author(s):  
Pandi Muthukumar ◽  
Dohyun Moon ◽  
Savarimuthu Philip Anthony
Keyword(s):  
Catalytic Activity ◽  
Coordination Polymer ◽  
Hydrogen Evolution ◽  
Coordination Polymers ◽  
Hydrogen Evolution Reaction ◽  
Electrocatalytic Activity ◽  
Polymer Structure ◽  
Copper Coordination ◽  
Copper Coordination Polymer

The presence of Co2+/Ni2+ ions strongly influenced the formation of copper coordination polymers that showed a structure-dependent hydrogen evolution reaction catalytic activity.

Copper coordination polymer electrocatalyst for strong hydrogen evolution reaction activity in neutral medium: influence of coordination environment and network structure

2019 ◽  
Vol 9 (16) ◽  
pp. 4347-4354 ◽  
Author(s):  
Pandi Muthukumar ◽  
Dohyun Moon ◽  
Savarimuthu Philip Anthony
Keyword(s):  
Coordination Polymer ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Network Structure ◽  
Good Stability ◽  
Neutral Medium ◽  
Coordination Environment ◽  
Copper Coordination ◽  
Copper Coordination Polymer ◽  
Medium Influence

Water-coordinated copper coordination polymer exhibited strong enhancement of HER activity in neutral medium with good stability compared to non-water-coordinated coordination polymer.

Polymorphs of a copper coordination compound: interlinking active sites enhance the electrocatalytic activity of the coordination polymer compared to the coordination complex

CrystEngComm ◽  
2020 ◽  
Vol 22 (3) ◽  
pp. 425-429
Author(s):  
Pandi Muthukumar ◽  
Mehboobali Pannipara ◽  
Abdullah G. Al-Sehemi ◽  
Dohyun Moon ◽  
Savarimuthu Philip Anthony
Keyword(s):  
Coordination Polymer ◽  
Coordination Compound ◽  
Electrocatalytic Activity ◽  
Active Sites ◽  
Coordination Complex ◽  
Neutral Medium ◽  
Coordination Environment ◽  
Copper Coordination ◽  
Copper Coordination Polymer

A copper coordination polymer exhibits highly enhanced HER activity in neutral medium compared to a coordination complex with a similar coordination environment.

Nanostructured nickel sulfides: phase evolution, characterization and electrocatalytic properties for the hydrogen evolution reaction

RSC Advances ◽  
2015 ◽  
Vol 5 (127) ◽  
pp. 104740-104749 ◽  
Author(s):  
Yuan Pan ◽  
Yinjuan Chen ◽  
Xiao Li ◽  
Yunqi Liu ◽  
Chenguang Liu
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Electrocatalytic Activity ◽  
Nickel Sulfide ◽  
Phase Evolution ◽  
Sulfide Catalysts ◽  
Electrocatalytic Properties

Nanostructured nickel sulfides with different phases were synthesized and their electrocatalytic activity for hydrogen evolution was investigated. β NiS exhibits the best catalytic activity among all the nickel sulfide catalysts.

Ultrasmall diiron phosphide nanodots anchored on graphene sheets with enhanced electrocatalytic activity for hydrogen production via high-efficiency water splitting

2016 ◽  
Vol 4 (41) ◽  
pp. 16028-16035 ◽  
Author(s):  
Huawei Huang ◽  
Chang Yu ◽  
Juan Yang ◽  
Xiaotong Han ◽  
Changtai Zhao ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Production ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
Active Site ◽  
Electrocatalytic Activity ◽  
High Efficiency ◽  
Graphene Sheets

Active site-enriched Fe2P nanodots anchored on graphene sheets (Fe2P-ND/FG) exhibit enhanced catalytic activity and stability for the hydrogen evolution reaction.

scholarly journals Design of Highly Active Electrodes for Hydrogen Evolution Reaction Based on Mo-Rich Alloys Electrodeposited from Ammonium Acetate Bath

Coatings ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 85 ◽  
Author(s):  
Edita Vernickaitė ◽  
Oksana Bersirova ◽  
Henrikas Cesiulis ◽  
Natalia Tsyntsaru
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Electrocatalytic Activity ◽  
Active Sites ◽  
Ammonium Acetate ◽  
Alkaline Media ◽  
Molar Ratio ◽  
Cathodic Current ◽  
Catalytic Behavior

The given research was driven by prospects to design Mo-rich coatings with iron group metals electrodeposited from a highly saturated ammonium acetate bath. The obtained coatings could be employed as prominent electrodes for the hydrogen evolution reaction (HER). It was found that the Mo content in Ni–Mo alloys can be tuned from 30 to 78 at.% by decreasing the molar ratio [Ni(II)]:[Mo(VI)] in the electrolyte from 1.0 to 0.25 and increasing the cathodic current density from 30 to 100 mA/cm2. However, dense cracks and pits are formed due to hydrogen evolution at high current densities and that diminishes the catalytic activity of the coating for HER. Accordingly, smoother and crack-free Ni–54 at.% Mo, Co–52 at.% Mo and Fe–54 at.% Mo alloys have been prepared at 30 mA/cm2. Their catalytic behavior for HER has been investigated in a 30 wt.% NaOH solution at temperatures ranging from 25 to 65 °C. A significant improvement of electrocatalytic activity with increasing bath temperature was noticed. The results showed that the sequence of electrocatalytic activity in alkaline media decreases in the following order: Co–52 at.% Mo > Ni–54 at.% Mo > Fe–54 at.% Mo. These peculiarities might be linked with different catalytic behavior of formed intermetallics (and active sites) in electrodeposited alloys. The designed electrodeposited Mo-rich alloys have a higher catalytic activity than Mo and Pt cast metals.

Improved catalytic activity of Mo1−xWxSe2 alloy nanoflowers promotes efficient hydrogen evolution reaction in both acidic and alkaline aqueous solutions

Nanoscale ◽  
2017 ◽  
Vol 9 (37) ◽  
pp. 13998-14005 ◽  
Author(s):  
Oren E. Meiron ◽  
Vasu Kuraganti ◽  
Idan Hod ◽  
Ronen Bar-Ziv ◽  
Maya Bar-Sadan
Keyword(s):  
Catalytic Activity ◽  
Synergistic Effect ◽  
Aqueous Solutions ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Electrocatalytic Activity ◽  
Electrocatalytic Properties ◽  
Se Deficiency

The electrocatalytic properties of 2D MoWSe2 nanoflower alloys showed a synergistic effect towards hydrogen evolution. Se deficiency was also found to significantly change the electrocatalytic activity of the materials.

A crystalline–amorphous Ni–Ni(OH)2 core–shell catalyst for the alkaline hydrogen evolution reaction

2020 ◽  
Vol 8 (44) ◽  
pp. 23323-23329
Author(s):  
Jing Hu ◽  
Siwei Li ◽  
Yuzhi Li ◽  
Jing Wang ◽  
Yunchen Du ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Electrocatalytic Activity ◽  
Core Shell ◽  
Alkaline Conditions

Crystalline–amorphous Ni–Ni(OH)2 core–shell assembled nanosheets exhibit outstanding electrocatalytic activity and stability for hydrogen evolution under alkaline conditions.

Hierarchically porous FeNi3@FeNi layered double hydroxide nanostructures: One-step fast electrodeposition and highly efficient electrocatalytic performances for overall water splitting

2021 ◽  
Author(s):  
Zihao Liu ◽  
Shifeng Li ◽  
Fangfang Wang ◽  
Mingxia Li ◽  
Yonghong Ni
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Layered Double Hydroxide ◽  
Hydrogen Evolution Reaction ◽  
Oxygen Evolution Reaction ◽  
Electrocatalytic Activity ◽  
Hierarchically Porous ◽  
One Step ◽  
Double Hydroxide

FeNi-layered double hydroxide (LDH) is thought to be an excellent electrocatalyst for oxygen evolution reaction (OER), but it always shows extremely poor electrocatalytic activity toward hydrogen evolution reaction (HER) in...

scholarly journals MoSe2-Ni3Se4 Hybrid Nanoelectrocatalysts and Their Enhanced Electrocatalytic Activity for Hydrogen Evolution Reaction

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Pengyuan Wu ◽  
Gangyong Sun ◽  
Yuanzhi Chen ◽  
Wanjie Xu ◽  
Hongfei Zheng ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Electrocatalytic Activity
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