Adsorbate Configurations in Ni Single-Atom Catalysts during CO_{2} Electrocatalytic Reduction Unveiled by Operando XAS, XES, and Machine Learning.

Nickel and nitrogen co-doped carbon (Ni-N-C) catalysts are attracting attention due to their exceptionally high performance in the electrocatalytic reduction of CO_{2}(CO_{2}RR) to CO. However, the direct experimental insight into the working mechanism of these catalysts is missing, hindering our fundamental understanding and their further improvement. This work sheds light on the nature of adsorbates forming under CO_{2}RR at singly dispersed Ni sites.

[Perception and identification of barriers to the use of digital technologies in arterial hypertension].

Introduction: Electronic devices and communication technologies are increasingly used to provide medical care to patients with high blood pressure. The main objective was to evaluate doctors' perception on the usefulness of digital technologies in hypertension. The secondary objectives were to evaluate the prevalence of use of digital technologies in the follow-up of patients with hypertension and to identify the barriers perceived by doctors for their implementation in the Argentine Republic.

Operando Raman spectroscopy uncovers hydroxide and CO species enhance ethanol selectivity during pulsed CO electroreduction.

Pulsed CO electroreduction (CORR) has recently emerged as a facile way to in situ tune the product selectivity, in particular toward ethanol, without re-designing the catalytic system. However, in-depth mechanistic understanding requires comprehensive operando time-resolved studies to identify the kinetics and dynamics of the electrocatalytic interface. Here, we track the adsorbates and the catalyst state of pre-reduced CuO nanocubes ( ~ 30 nm) during pulsed CORR using sub-second time-resolved operando Raman spectroscopy.