scholarly journals CoP for hydrogen evolution: implications from hydrogen adsorption

2016 ◽  
Vol 18 (34) ◽  
pp. 23864-23871 ◽  
Author(s):  
Guoxiang Hu ◽  
Qing Tang ◽  
De-en Jiang
Keyword(s):  
Free Energy ◽  
Hydrogen Evolution ◽  
Hydrogen Adsorption ◽  
Hydrogen Atoms ◽  
Free Energy Of Adsorption ◽  
Adsorption Of Hydrogen

Synergistic adsorption of hydrogen atoms on Co and P sites of CoP(111) leads to a nearly neutral free energy of adsorption that is highly conductive to hydrogen evolution.

Hydrogen Adsorption of Ruthenium: Isosteres of Solubility of Adsorbed Hydrogen

1998 ◽  
Vol 513 ◽  
Author(s):  
S. Yu. Zaginaichenko ◽  
Z. A. Matysina ◽  
D. V. Schur ◽  
V. K. Pishuk
Keyword(s):  
Phase Transition ◽  
Free Energy ◽  
Theoretical Investigation ◽  
State Transition ◽  
Hydrogen Adsorption ◽  
Adsorbed Hydrogen ◽  
Hydrogen Atoms ◽  
Hexagonal Close Packed ◽  
The Face ◽  
Pressure Hydrogen

ABSTRACTThe theoretical investigation of solubility isosteres of adsorbed hydrogen has been performed for free face (0001) of crystals with hexagonal close-packed lattice A3 of Mg type. The face free energy has been calculated and its dependence on temperature, pressure, hydrogen concentration and character of hydrogen atoms distribution over surface interstitial sites of different type has been defined. The equations of thermodynamic equilibrium and solubility of adsorbed hydrogen have been defined. The plots of isosteres in the region of phase transition from isotropic to anisotropic state have been constructed and it has been established that in anisotropic state the order in distribution of hydrogen atoms over interstitial sites of different type must become apparent. Comparison of the theoretical isosteres with experimental for ruthenium has been carried out, the isotropic-anisotropic state transition can stipulate a stepwise and break-like change in isosteres.

scholarly journals EHM Investigation of Hydrogen Adsorption on Model Nickel Substrates

1977 ◽  
Vol 32 (10) ◽  
pp. 1152-1156 ◽  
Author(s):  
D. L. Lazarov ◽  
D. R. Drakova
Keyword(s):  
Experimental Data ◽  
Hydrogen Adsorption ◽  
Heat Of Adsorption ◽  
Hydrogen Atoms ◽  
Crystal Face ◽  
Experimental Adsorption ◽  
Adsorption Studies ◽  
Nickel Substrates ◽  
Adsorption Of Hydrogen

This paper comprises the results of an Extended Hiickel investigation of dissociative hydrogen adsorption on optimized models of the three low-index crystal faces of nickel. The frontier MO's approach proves suitable for adsorption studies of this type. Two adsorption forms for hydrogen atoms are established - on top of substrate atoms and in the holes of the substrate. Dissociative non-activated adsorption of hydrogen atoms on top of substrate atoms is found to be energetically most favourable. A correlation between the theoretical and ß1 and ß2 experimental adsorption forms is established. The heat of adsorption diminishes in the order of diminishing density of the crystal face Q(111) > Q(100) > Q(110). There exist experimental data corroborating this result

Enhancing the hydrogen evolution activity of MoS2 basal planes and edges using tunable carbon-based supports

Nanoscale ◽  
2020 ◽  
Author(s):  
Charlie Ruffman ◽  
Calum Keith Gordon ◽  
James Thomas Alan Gilmour ◽  
Frank Donald Mackenzie ◽  
Anna L. Garden
Keyword(s):  
Density Functional Theory ◽  
Free Energy ◽  
Hydrogen Evolution ◽  
Basal Plane ◽  
Density Functional ◽  
Hydrogen Adsorption ◽  
Two Dimensional ◽  
Functional Theory ◽  
Adsorption Free Energy ◽  
Carbon Based

The hydrogen adsorption free energy (ΔGHads) on the basal plane and edges of MoS2 is studied using periodic density functional theory, with the catalyst supported by a range of two-dimensional...

Polyvinylpyrrolidone Gel Based Pt/Ni(OH)2 Heterostructures with Redistributing Charges for Enhanced Alkaline Hydrogen Evolution Reaction

2021 ◽  
Author(s):  
Jin Li ◽  
Bo Li ◽  
He Huang ◽  
Shuo Yan ◽  
Changzhou Yuan ◽  
...  
Keyword(s):  
Free Energy ◽  
Hydrogen Evolution ◽  
Gibbs Free Energy ◽  
Hydrogen Evolution Reaction ◽  
Dissociation Energy ◽  
Active Sites ◽  
Hydrogen Adsorption ◽  
Water Dissociation ◽  
Promising Strategy

Optimizing water dissociation energy and hydrogen adsorption Gibbs free energy of active sites through redistributing charges in heterostructures are a promising strategy for improving alkaline hydrogen evolution reaction (HER). Herein,...

Selective phosphidation: an effective strategy toward CoP/CeO2 interface engineering for superior alkaline hydrogen evolution electrocatalysis

2018 ◽  
Vol 6 (5) ◽  
pp. 1985-1990 ◽  
Author(s):  
Rong Zhang ◽  
Xiang Ren ◽  
Shuai Hao ◽  
Ruixiang Ge ◽  
Zhiang Liu ◽  
...  
Keyword(s):  
Free Energy ◽  
Hydrogen Evolution ◽  
Hydrogen Adsorption ◽  
Water Dissociation ◽  
Effective Strategy ◽  
Interface Engineering ◽  
Adsorption Free Energy ◽  
Ti Mesh

In 1.0 M KOH, CoP–CeO2 nanosheets film on Ti mesh (CoP–CeO2/Ti) attains 10 mA cm−2 at overpotential of 43 mV due to its lower water dissociation free energy and more optimal hydrogen adsorption free energy than CoP.

Flower-like tungsten-doped Fe–Co phosphides as efficient electrocatalysts for hydrogen evolution reaction

CrystEngComm ◽  
2021 ◽  
Author(s):  
Qian Zhang ◽  
Shuihua Tang ◽  
Lieha Shen ◽  
Weixiang Yang ◽  
Zhen Tang ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Adsorption Energy ◽  
High Performance ◽  
Hydrogen Adsorption ◽  
Cost Effective

Developing cost-effective and high-performance electrocatalysts for hydrogen evolution reaction (HER) are imperative thanks to rapid increase of fuel-cell driven vehicles. Tungsten (W) possesses advantages of optimized hydrogen adsorption energy and...

Sign in / Sign up

Export Citation Format

Share Document