Artificial Heterointerfaces Achieve Delicate Reaction Kinetics towards Hydrogen Evolution and Hydrazine Oxidation Catalysis

2020 ◽  
Author(s):  
Yi Xie ◽  
Qizhu Qian ◽  
Jihua Zhang ◽  
Jianming Li ◽  
Yapeng Li ◽  
...  
Keyword(s):  
Reaction Kinetics ◽  
Hydrogen Evolution ◽  
Oxidation Catalysis ◽  
Hydrazine Oxidation

Hierarchical Microsphere MOF Arrays with Ultralow Ir Doping for Efficient Hydrogen Evolution Coupled with Hydrazine Oxidation in Seawater

2021 ◽  
Author(s):  
Xuejun Zhai ◽  
Qingping Yu ◽  
Guishan Liu ◽  
Junlu Bi ◽  
Yu Zhang ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Hydrogen Evolution ◽  
Oxygen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Oxygen Evolution Reaction ◽  
Water Electrolysis ◽  
Efficient Catalyst ◽  
Hydrazine Oxidation ◽  
Renewable Hydrogen

Hydrogen evolution reaction (HER) based on water electrolysis is promising for renewable hydrogen production. Limited by sluggish anodic oxygen evolution reaction (OER), rational fabrication of efficient catalyst for HER coupled...

scholarly journals An exceptionally stable octacobalt-cluster-based metal–organic framework for enhanced water oxidation catalysis

2019 ◽  
Vol 10 (42) ◽  
pp. 9859-9864 ◽  
Author(s):  
Ning-Yu Huang ◽  
Jian-Qiang Shen ◽  
Zi-Ming Ye ◽  
Wei-Xiong Zhang ◽  
Pei-Qin Liao ◽  
...  
Keyword(s):  
Reaction Kinetics ◽  
Adsorption Energy ◽  
Water Oxidation ◽  
Metal Organic Framework ◽  
Oxidation Catalysis ◽  
Cobalt Ions ◽  
Water Oxidation Catalysis ◽  
Metal Organic ◽  
Kinetics Of ◽  
Organic Framework

The site, capping four coplanar cobalt ions, has a near-optimal OH− adsorption energy, which is beneficial to accelerate the reaction kinetics of water oxidation catalysis.

Ni3[Fe(CN)6]2 nanocubes boost the catalytic activity of Pt for electrochemical hydrogen evolution

2018 ◽  
Vol 5 (7) ◽  
pp. 1683-1689 ◽  
Author(s):  
Xiao Zhang ◽  
Pei Liu ◽  
Yanfang Sun ◽  
Tianrong Zhan ◽  
Qingyun Liu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Reaction Kinetics ◽  
Hydrogen Evolution ◽  
Alkaline Media ◽  
Water Dissociation ◽  
Acidic And Alkaline Media ◽  
Ni Species ◽  
Low Pt Loading ◽  
Kinetics Of

Hybrid electrocatalyst of ultrafine Pt particles anchored on a Ni3[Fe(CN)6]2 nanocube with low Pt loading of 4.0% is designed for HERs, and superior catalytic activity is obtained in both acidic and alkaline media because the Ni species remarkably facilitates the reaction kinetics of water dissociation and thus improves HER activity.

scholarly journals Oxidation-Reduction Behaviours, Electrolysis Characteristics and Efficiency of Pd-50at.%Ni Electrode in Alkaline Electrolyte

1970 ◽  
Vol 33 (1) ◽  
pp. 1-13 ◽  
Author(s):  
Md Ashraful Islam Molla ◽  
Mithun Sarker ◽  
Rafiqul Islam ◽  
AKM Fazle Kibria
Keyword(s):  
Reaction Kinetics ◽  
Hydrogen Evolution ◽  
Surface Reaction ◽  
Alkaline Electrolyte ◽  
Potential Range ◽  
Cyclic Voltammogram ◽  
Oxidation Reduction ◽  
Density Values ◽  
Surface Reaction Kinetics ◽  
Academy Of Sciences

Convinced on the necessity of finding effective electrodes for electrolyser- the oxidation-reduction behaviors, surface reaction kinetics, stability, electrolysis characteristics and efficiency of a Pd-50at.%Ni electrode have been investigated in 30wt.%KOH electrolyte at room temperature using cyclic voltammetry. Cyclic voltammogram of the electrode showed three couples of oxidation-reduction peaks in between the potential range - 1.0 to + 0.65 V. These peaks were found to be originated from the transformation of zero valent metal to their higher oxides in three consecutive steps and vice versa. The peak potentials, potential differences of the couples and the peak currents were found remarkably different from those of Pd and Ni electrodes. The surface reaction kinetics at Pd-Ni electrode followed the surface reaction trends similar to those of Pd and Ni electrodes. The apparent stability of the electrode was found good. The electrode showed 1.6 and 6.8 times higher oxygen evolution efficiencies than the Ni and Pd electrodes. Addition of Ni with Pd caused hydrogen evolution potentials to move to the negative direction. Tafel plot for the hydrogen evolution reactions (HER) showed two well-defined Tafel regions. Kinetic parameters, i.e., Tafel slope and exchange current density values for the low and high overpotential regions were found 127 mV/dec and 273 mV/dec, and 1.72 x 10-2 mA/cm2 and 1.52 mA/cm2, respectively. Observed slopes indicated its better efficiency over the Pd electrode. Journal of Bangladesh Academy of Sciences, Vol. 33, No. 1, 1-13, 2009 doi: 10.3329/jbas.v33i1.2945

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