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The inefficient storage hydrogen is the bottleneck that restricts the large-scale application of green hydrogen energy. Compared with the existing hydrogen storage technologies, naphthalene-decalin organic liquid hydrogen storage, as a highly promising hydrogen storage technology, is expected to provide a new and efficient solution for future energy storage and utilization. The naphthalene-decalin hydrogen storage system can enhance the hydrogen storage capacity of organic liquids, improve the hydrogenation/dehydrogenation cycle and increase economic efficiency. The research progress on naphthalene-decalin organic liquid hydrogen storage technology was reviewed, and the mechanisms of naphthalene hydrogenation and decalin dehydrogenation were analyzed, and the structures of catalysts, processes and technical economy of naphthalene hydrogenation and decalin dehydrogenation were discussed, and the main challenges of naphthalene-decalin organic liquid hydrogen storage technology were summarized. Starting from the key points of demand, through in-depth exploration of the mechanism of decalin dehydrogenation, highly efficient catalysts from the atomic point of view are designed and structures of catalyst surface are constructed to improve the efficiency of decalin dehydrogenation and promote the commercialization of naphthalene-decalin organic liquid hydrogen storage technology. [ABSTRACT FROM AUTHOR]

Transition metal sulfide catalysts with abundant reserves and low prices exhibit high activity for hydrogen production from photocatalytic water splitting and are ideal choices to replace precious metal platinum catalysts. The preparation methods, structural morphologies and hydrogen production rates of transition metal sulfide catalysts for hydrogen production from photocatalytic water splitting were reviewed. Strategies for improving the efficiency of hydrogen production from photocatalytic water splitting by transition metal sulfide catalysts and their composite catalysts were discussed, including expanding the light absorption range, enhancing the separation of photogenerated electron-hole pairs and promoting catalyst surface reactions, to prepare more efficient transition metal sulfide catalysts that meet commercial requirements. At last, the future research trends in the field of hydrogen production from photocatalytic water splitting by transition metal sulfide catalysts were prospected. [ABSTRACT FROM AUTHOR]

Numerical calculations and experimental approaches are used to examine the slip characteristics of 1064 nm laser ablated single crystal germanium. The ablation and cooling processes are used to investigate the influence of laser power density on the creation of the slip process. A 1064 nm continuous laser and a nanosecond laser were used to ablate single-crystal germanium samples, and the damage to the surface was seen using an optical microscope. The results demonstrate that raising the laser power density to 107 W/cm2 efficiently suppresses slip production during laser processing. [ABSTRACT FROM AUTHOR]

The wide variety of uses for nanoparticles (NPs) is due to their unique combination of features in a single assembly. The arc melted copper-cobalt ingot sample were qualitatively studied using laser induced breakdown spectroscopy (LIBS). Later, using the fabricated alloy as a target material for Nd:YAG laser ablation, CuCo2O4 NPs were synthesized. The magnetic properties of the synthesized NPs were studied using a vibrating sample magnetometer (VSM). To determine the composition and morphology of the synthesized NPs, X-ray diffraction (XRD), energy dispersive X-ray (EDX) analysis, transmission electron microscopy (TEM), scanning electron microscopy (SEM), and dynamic light scattering (DLS) techniques were used. The TEM and DLS showed that particles were spherical in shape with an average size of 32 nm and 28 nm, respectively. The antibacterial activity of the synthesized NPs was studied against S. aureus and E. coli strains as positive and negative controls using a standard approach. CuCo2O4 nanoparticles exhibited non-mutagenic potential against S. typhimurium TA-98 and TA-100 strains. Furthermore, the magnetic hyperthermia study of CuCo2O4 nanofluid was examined using a lab-made apparatus. The specific absorption rates (SAR) of 4.57 and 5.17 W/g were determined for the magnetic field strength of 230 μT and 247 μT, respectively. The study shows antibacterial activity and magnetic hyperthermia potential of the synthesized nanoparticles. [ABSTRACT FROM AUTHOR]