Determination of the adsorption behaviour of ‘overpotential-deposited’ hydrogen-atom species in the cathodic hydrogen-evolution reaction by analysis of potential-relaxation transients

1985 ◽  
Vol 81 (8) ◽  
pp. 1841 ◽  
Author(s):  
Brian E. Conway ◽  
Lijun Bai
Keyword(s):  
Hydrogen Atom ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Adsorption Behaviour ◽  
Cathodic Hydrogen Evolution

Hydrogen evolution reaction at PdNPs decorated 1:1 clay minerals and application to the electrocatalytic determination of p -nitrophenol

2017 ◽  
Vol 801 ◽  
pp. 49-56 ◽  
Author(s):  
Gustave Kenne Dedzo ◽  
Emmanuel Pameté Yambou ◽  
Melissa Ramel Topet Saheu ◽  
Gaelle Ngnie ◽  
Charles Peguy Nanseu-Njiki ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Clay Minerals ◽  
Hydrogen Evolution Reaction ◽  
Electrocatalytic Determination

Computational investigation of the effect of OH on the hydrogen evolution reaction by Nickel-bis(dithiolene) and Nickel-bis(diselenolene) complexes

2020 ◽  
Author(s):  
wenyuan zhang ◽  
Changmin Lee ◽  
Eric A.C. Bushnell
Keyword(s):  
Hydrogen Atom ◽  
Hydrogen Evolution ◽  
Oxidation State ◽  
Hydrogen Evolution Reaction ◽  
Oh Radicals ◽  
Oh Radical ◽  
Chalcogen Atom ◽  
Present Level ◽  
Computational Investigation

In the present study, the reactivity of OH with Ni(X2C2H2)2 and Ni(X2C2H2)2- (where X = S or Se) was investigated From the thermodynamics, it found that the OH radical attacks a backbone C-atom of the Ni(S2C2H2)2 complex. For the Ni(Se2C2H2)2 complex, the OH is predicted to target the ligating chalcogen atom. The significance of this is that with the attack of OH to a backbone C-atom, the thermodynamic cost to lose a proton or hydrogen atom ranges from exergonic to marginally endergonic depending on the oxidation state of the complex. Notably, such a process results in a rearrangement of the complex, likely leading to deactivation of the catalyst. Where OH has attacked a ligating chalcogenide atom, the thermodynamic cost to lose a proton or hydrogen is endergonic regardless of oxidation state of the complex. Where OH attacks a coordinating chalcogenide atom, the thermodynamics for the addition of a proton was considered. At the present level of theory, it was found that for the dithiolene and diselenolene monoanionic complexes, the addition of a proton is marginally endergonic. However, following protonation, the loss of water is significantly exergonic and results in the regeneration of the neutral non-oxidized Ni-complex. Given the greater tendency for OH to attack Se versus S it may be speculated that the use of diselenolene ligands may offer a means to protect the Ni-complex from damaging OH radicals due to the thermodynamic tendency for OH to attack Se atom of the diselenolene complexes not seen in the dithiolene complexes.

First-Principles Determination of Active Sites of Ni Metal-Based Electrocatalysts for Hydrogen Evolution Reaction

2018 ◽  
Vol 10 (46) ◽  
pp. 39624-39630 ◽  
Author(s):  
Yujuan Dong ◽  
Jingshuang Dang ◽  
Wenliang Wang ◽  
Shiwei Yin ◽  
Yun Wang
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
First Principles ◽  
Active Sites

Impedance spectra of the cathodic hydrogen evolution reaction on polycrystalline rhenium

2016 ◽  
Vol 41 (8) ◽  
pp. 4660-4669 ◽  
Author(s):  
R. Garcia-Garcia ◽  
J.G. Rivera ◽  
R. Antaño-Lopez ◽  
F. Castañeda-Olivares ◽  
G. Orozco
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Impedance Spectra ◽  
Cathodic Hydrogen Evolution
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