A Complex Oxide Containing Inherent Peroxide Ions for Catalyzing Oxygen Evolution Reactions in Acid.

Proton exchange membrane water electrolyzers powered by sustainable energy represent a cutting-edge technology for renewable hydrogen generation, while slow anodic oxygen evolution reaction (OER) kinetics still remains a formidable obstacle that necessitates basic comprehension for facilitating electrocatalysts' design. Here, we report a low-iridium complex oxide LaSrIrO with a unique hexagonal structure consisting of isolated Ir(V)O octahedra and true peroxide O groups as a highly active and stable OER electrocatalyst under acidic conditions. Remarkably, LaSrIrO, containing 59 wt % less iridium relative to the benchmark IrO, shows about an order of magnitude higher mass activity, 6-folds higher intrinsic activity than the latter, and also surpasses the state-of-the-art Ir-based oxides ever reported.

Neutrophil-to-Lymphocyte Ratio Predicts Sepsis in Adult Patients Meeting Two or More Systemic Inflammatory Response Syndrome Criteria.

Introduction: Determining which patients who meet systemic inflammatory response syndrome (SIRS) criteria have bacterial sepsis is a difficult challenge for emergency physicians. We sought to determine whether the neutrophil-to-lymphocyte ratio (NLR) could be used to exclude bacterial sepsis in adult patients who meet ≥2 SIRS criteria and are being evaluated for sepsis.

Methods: Consenting adult patients meeting ≥2 SIRS criteria and undergoing evaluation for sepsis were enrolled.

Spinel-Type Structured Phosphor Near-Infrared-II Emission: Intervalence Charge Transfer and Hetero-Valent Chromium Pairs.

Near-infrared (NIR) emitting phosphors draw much attention because they show great applicability and development prospects in many fields. Herein, a series of inverse spinel-type structured LiGaO phosphors with a high concentration of Cr activators is reported with a dual emission band covering NIR-I and II regions. Except for strong ionic exchange interactions such as Cr-Cr and Cr clusters, an intervalence charge transfer (IVCT) process between aggregated Cr ion pairs is proposed as the mechanism for the ~1210 nm NIR-II emission.

May Measurement Month 2021: an analysis of blood pressure screening results from South Africa.

Elevated blood pressure (BP) is a growing burden worldwide, leading to over 10 million deaths each year. In Sub-Saharan Africa, hypertension prevalence is higher and cardiovascular events occur at a younger age than in Europe or America. May Measurement Month (MMM) is a global campaign initiated by the International Society of Hypertension (ISH) aimed at raising awareness of high BP.