Corrosion-Guided Surface Engineering of Permalloy for Efficient Alkaline Oxygen Evolution Reaction.

The production of H via water electrolysis is limited by the kinetically sluggish oxygen evolution reaction (OER) that occurs on the anode of water electrolysis. In alkaline water electrolysis, OER is catalyzed equally well by non-noble metals-based catalysts. In this study, we report one such advanced OER electrocatalyst developed by an unconventional electrochemical anodization in acid from a readily available, abundant, and cheap permalloy (NiFe).

Time-Domain Observation of Ultrafast Self-Trapped Exciton Formation in Lead-Free Double Halide Perovskites.

Self-trapped excitons (STEs), which have one or both carriers spatially trapped by a lattice distortion, are associated with broadband emission and a large Stokes shift that is desirable for many applications. The fundamental physical processes that lead to their formation are difficult to observe, mainly due to the ultrafast time scales involved and the low oscillator strength of STE transitions. Here, we employ ultrafast transient absorption spectroscopy with sub-20 fs temporal resolution in the ultraviolet to study the STE formation process in a pair of lead-free double perovskites, CsAgInCl and Cs(AgNa)InCl.

Deep learning-based eye sign communication system for people with speech impairments.

: People with motor difficulties and speech impairments often struggle to communicate their needs and views. Augmentative and Alternative Communication (AAC) offers solutions through gestures, body language, or specialized equipment. However, eye gaze and eye signs remain the sole communication method for some individuals.

Tailored Cation Distribution in High-Entropy Mn-Co-Ni-Cu-Zn Oxides: Toward Advanced OER Electrocatalysis.

Water splitting is a highly promising technology for renewable energy and energy storage. The primary challenge is to develop cost-effective, improved, long-lasting, and highly efficient electrocatalysts for the oxygen evolution reaction (OER). High-entropy oxides (HEOs) are the next generation of nanomaterials due to their complexity and significant role in modern scientific research.

Reducing noble metal dependence: oxygen evolution reaction with a Ru-minimized BiRuO@MOF-801 composite.

Developing efficient and noble metal-minimized electrocatalysts for the oxygen evolution reactions (OER) is critical for energy conversion reactions. Here we present Ru-minimized BiRuO@MOF-801 that synergistically combines the high catalytic activity of the bimetallic oxide with the unique structural and hydrophilic properties of the Zr-MOF. The composite achieves superior OER performance with a low overpotential of 307 mV at 50 mA cm and a Tafel slope of 99.