Boosting the Production of Hydrogen from an Overall Urea Splitting Reaction Using a Tri-Functional Scandium-Cobalt Electrocatalyst.

The creation of highly efficient and economical electrocatalysts is essential to the massive electrolysis of water to produce clean energy. The ability to use urea reaction of oxidation (UOR) in place of the oxygen/hydrogen evolution process (OER/HER) during water splitting is a significant step toward the production of high-purity hydrogen with less energy usage. Empirical evidence suggests that the UOR process consists of two stages.

A seed-like structured Mo@ZrS catalyst on graphene nanosheets for boosting the performance of rechargeable Zn-air batteries.

Novel composite materials are being studied by researchers for energy storage and renewable energy applications. Here, a seed-like Mo-doped ZrS catalyst was developed on a reduced graphene oxide (rGO) surface by an annealing and hydrothermal method. Using photoelectron spectroscopy, scanning microscopy, and X-ray diffraction analyses, the structure of Mo@ZrS/rGO and the impact of heteroatoms are demonstrated, providing insight into the catalyst.

Predictive accuracy of Barrett TK toric calculator compared to measured posterior corneal astigmatism using Pentacam in toric IOL power calculation.

Purpose: To compare the predictive accuracy of Barrett total keratometry (Barrett TK) toric calculator with the measured posterior corneal astigmatism (PCA) by using Pentacam in toric intraocular lens (IOL) power calculation.

Methods: A prospective analysis was done on 118 eyes requiring toric IOL power implantation. The absolute prediction error of the Barrett TK toric calculator and the measured PCA in the online toric calculator were assessed and compared to the standard Alcon toric calculator (with Barrett toric calculator incorporated).

Accuracy of Barrett versus third-generation intraocular lens formula across all axial lengths.

Purpose: The purpose of this study is to evaluate and compare the accuracy of Barrett Universal II versus third-generation formula for different intraocular lens (IOL) powers for Indian eyes with different axial lengths (ALs).

Design: This is a retrospective, nonrandomized consecutive case series.

Methods: This study reviewed 981 eyes from 825 patients who had uneventful cataract surgery and IOL implantation.