Herein, the effect of the alkali cation (Li + ,Na + ,K + , and Cs + )inalkaline electrolytes with and without Fe impurities is investigated for enhancing the activity of nickel oxyhydroxide (NiOOH) for the oxygen evolution reaction (OER). Cyclic voltammograms showthat Fe impurities have asignificant catalytic effect on OER activity;h owever,b oth under purified and unpurified conditions,the trend in OER activity is Cs + > Na + > K + > Li + ,suggesting an intrinsic cation effect of the OER activity on Fe-free Ni oxyhydroxide.I nsitu surface enhanced Raman spectroscopy( SERS), shows this cation dependence is related to the formation of superoxo OER intermediate (NiOO À ). The electrochemically active surface area, evaluated by electrochemical impedance spectroscopy (EIS), is not influenced significantly by the cation. We postulate that the cations interact with the NiÀOO À species leading to the formation of NiOO À ÀM + species that is stabilized better by bigger cations (Cs + ). This species would then act as the precursor to O 2 evolution, explaining the higher activity.Supportinginformation and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

Herein, the effect of the alkali cation (Li + ,Na + ,K + , and Cs + )inalkaline electrolytes with and without Fe impurities is investigated for enhancing the activity of nickel oxyhydroxide (NiOOH) for the oxygen evolution reaction (OER). Cyclic voltammograms showthat Fe impurities have asignificant catalytic effect on OER activity;h owever,b oth under purified and unpurified conditions,the trend in OER activity is Cs + > Na + > K + > Li + ,suggesting an intrinsic cation effect of the OER activity on Fe-free Ni oxyhydroxide.I nsitu surface enhanced Raman spectroscopy( SERS), shows this cation dependence is related to the formation of superoxo OER intermediate (NiOO À ). The electrochemically active surface area, evaluated by electrochemical impedance spectroscopy (EIS), is not influenced significantly by the cation. We postulate that the cations interact with the NiÀOO À species leading to the formation of NiOO À ÀM + species that is stabilized better by bigger cations (Cs + ). This species would then act as the precursor to O 2 evolution, explaining the higher activity.

To gain better understanding of the stabilizing interactions between metal ions and DNA quadruplexes, dispersion-corrected density functional theory (DFT-D) based calculations were performed on double-, triple- and four-layer guanine tetrads...

Thioamides and selenoamides are better hydrogen‐bond donors than carboxamides because their amino groups are more positively charged. Quantum chemical analyses reveal that this counterintuitive phenomenon, which cannot be explained by the electronegativity, originates from the larger electronic density flow from the nitrogen lone pair of the NH2 group towards the lower‐lying π* orbital on the C=S or C=Se bond. This difference can be traced back to the effective steric size of the chalcogen atoms. More information can be found in the Research Article by C. Nieuwland and C. Fonseca Guerra (DOI: 10.1002/chem.202200755).

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