Unravelling the roles of alkali-metal cations for the enhanced oxygen evolution reaction in alkaline media

2021 ◽  
Vol 288 ◽  
pp. 119981
Author(s):  
Julie Anne D. del Rosario ◽  
Guangfu Li ◽  
Marc Francis M. Labata ◽  
Joey D. Ocon ◽  
Po-Ya Abel Chuang
Keyword(s):  
Alkali Metal ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Metal Cations ◽  
Alkaline Media ◽  
Alkali Metal Cations

scholarly journals Key activity descriptors of nickel-iron oxygen evolution electrocatalysts in the presence of alkali metal cations

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Mikaela Görlin ◽  
Joakim Halldin Stenlid ◽  
Sergey Koroidov ◽  
Hsin-Yi Wang ◽  
Mia Börner ◽  
...  
Keyword(s):  
Alkali Metal ◽  
Oxygen Evolution ◽  
Density Functional ◽  
Ph Effect ◽  
Metal Cations ◽  
Lewis Acidity ◽  
Alkali Metal Cations ◽  
Reactivity Descriptors ◽  
Nickel Iron ◽  
Redox Peak

AbstractEfficient oxygen evolution reaction (OER) electrocatalysts are pivotal for sustainable fuel production, where the Ni-Fe oxyhydroxide (OOH) is among the most active catalysts for alkaline OER. Electrolyte alkali metal cations have been shown to modify the activity and reaction intermediates, however, the exact mechanism is at question due to unexplained deviations from the cation size trend. Our X-ray absorption spectroelectrochemical results show that bigger cations shift the Ni2+/(3+δ)+ redox peak and OER activity to lower potentials (however, with typical discrepancies), following the order CsOH > NaOH ≈ KOH > RbOH > LiOH. Here, we find that the OER activity follows the variations in electrolyte pH rather than a specific cation, which accounts for differences both in basicity of the alkali hydroxides and other contributing anomalies. Our density functional theory-derived reactivity descriptors confirm that cations impose negligible effect on the Lewis acidity of Ni, Fe, and O lattice sites, thus strengthening the conclusions of an indirect pH effect.

scholarly journals The phenoxyl group-modulated interplay of cation–π and σ-type interactions in the alkali metal series

2020 ◽  
Vol 22 (46) ◽  
pp. 27105-27120
Author(s):  
Giacomo Prampolini ◽  
Marco d'Ischia ◽  
Alessandro Ferretti
Keyword(s):  
Alkali Metal ◽  
Noncovalent Interactions ◽  
Metal Cations ◽  
Alkali Metal Cations ◽  
Striking Effect

An extensive exploration of the interaction PESs of phenol and catechol complexes with alkali metal cations reveals a striking effect of –OH substitution on the balance between cation-π and σ-type noncovalent interactions.

Influence of Alkali Metal Cations on the Photodimerization of Bromo Cinnamates Studied by Solid-State NMR

2020 ◽  
Vol 124 (50) ◽  
pp. 27614-27620
Author(s):  
Marufa Zahan ◽  
He Sun ◽  
Sophia E. Hayes ◽  
Harald Krautscheid ◽  
Jürgen Haase ◽  
...  
Keyword(s):  
Solid State ◽  
Alkali Metal ◽  
Solid State Nmr ◽  
Metal Cations ◽  
Alkali Metal Cations

Derivation of Class II Force Fields. 4. van der Waals Parameters of Alkali Metal Cations and Halide Anions

1997 ◽  
Vol 101 (39) ◽  
pp. 7243-7252 ◽  
Author(s):  
Zhengwei Peng ◽  
Carl S. Ewig ◽  
Ming-Jing Hwang ◽  
Marvin Waldman ◽  
Arnold T. Hagler
Keyword(s):  
Alkali Metal ◽  
Force Fields ◽  
Van Der Waals ◽  
Metal Cations ◽  
Class Ii ◽  
Alkali Metal Cations ◽  
Halide Anions
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