Preface to the Special Issue on Hydrogen Production, Storage, Application, and Sensing.

This issue focuses on the multifaceted nature of hydrogen, exploring the latest research, advancements, and applications in this rapidly evolving field. Topics covered include hydrogen production methods, advancements in storage technologies, diverse applications, and the significance of hydrogen sensing for monitoring its environmental impact.

Identification of Suitable Mesh Size of Commercial Stainless-Steel for Electrochemical Oxygen Evolution Reaction.

The study examines the oxygen evolution reaction (OER) electrocatalytic efficiency of various stainless-steel mesh (SSM) sizes in electrolytic cells. Stainless steel is chosen due to its widespread availability and stability, making it an economically viable option. The primary objective of this investigation is to determine the optimal stainless-steel mesh size among those currently widely available on the market.

Advanced High-Energy All-Solid-State Hybrid Supercapacitor with Nickel-Cobalt-Layered Double Hydroxide Nanoflowers Supported on Jute Stick-Derived Activated Carbon Nanosheets.

Developing efficient, lightweight, and durable all-solid-state supercapacitors is crucial for future energy storage systems. The study focuses on optimizing electrode materials to achieve high capacitance and stability. This study introduces a novel two-step pyrolysis process to synthesize activated carbon nanosheets from jute sticks (JAC), resulting in an optimized JAC-2 material with a high yield (≈24%) and specific surface area (≈2600 m g).

Electrochemical Reduction of CO to C1 and C2 Liquid Products on Copper-Decorated Nitrogen-Doped Carbon Nanosheets.

Due to the significant rise in atmospheric carbon dioxide (CO) concentration and its detrimental environmental effects, the electrochemical CO conversion to valuable liquid products has received great interest. In this work, the copper-melamine complex was used to synthesize copper-based electrocatalysts comprising copper nanoparticles decorating thin layers of nitrogen-doped carbon nanosheets (Cu/NC). The as-prepared electrocatalysts were characterized by XRD, SEM, EDX, and TEM and investigated in the electrochemical CO reduction reaction (ECORR) to useful liquid products.

An inelastic neutron scattering investigation of holmium orthoferrite.

The inelastic neutron scattering spectra recorded in this study and elsewhere provide a useful set of crystal-field (CF) energy levels for the ground= 6 term of Hoin HoFeO. The resolution of the low-energy, temperature-dependent pseudo-quadrupole ground state splitting and magnon peaks is consistent with the self-ordering of the Hosublattice at∼ 8-10 K and supports earlier electron spin resonance investigations of the Homagnon behaviour. Systematic analysis of the grouped singlet CF levels of Ho: HoFeO, in conjunction with the CF Kramers doublet levels of the neighbouring Er: ErFeO, has yielded possible sets of CF parameters for the two systems.