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Elucidating the effect of CoNPs and Mn-phosphate as found in K-phthalimide-derived N-doped carbon sheet in capacitive charge-storage while forming a composite with ZIF-67 and oxidized K-Ph-Oxide similar to graphene oxide.

AbstractThis paper introduces an innovative helical coil heat exchanger using Hematite as a heat storage material, enhancing retention and thermal management. Parabolic trough collectors deliver heat to the heat exchanger's shell side using Therminol VP‐1 with Al2O3 nanoparticles, while another collector supplies vapor to the helical coil connected to a turbine. A concentric cylinder serves as a rechargeable heat reservoir. The study presents a control‐oriented modeling methodology for a practical TES tank with a helical immersed heat exchanger. Temperature dynamics of the heat transfer fluid within the tank are discretely modeled for computational efficiency in real‐time simulations. A simulated case with model‐based feedback control demonstrates the efficacy of this approach, validated by comparing simulation results with experimental data. Results show a close correlation between the surface temperature of the heat storage tank and the helical coil temperature, affirming model accuracy and reliability. The system achieves an efficiency of 37%. A case study involving a 1 Kw steam‐operated power plant (150–200°C, 7–10 bar, 50 kg/h) illustrates the practical application and benefits of the methodology in achieving intelligent and efficient TES system operation.

Transition metal carbonate hydroxides (TMCHs) possess rapid ion transfer ability, and minimal volume expansion during long charge–discharge cycles.

Supercapacitors have gained prominence as a cutting‐edge energy storage technology. However, the performance of conventional transition metal oxide electrodes is hindered by their poor electrical conductivity, insufficient ion‐accessible surface area, and complex synthesis processes. Herein, a firsthand demonstration of carbon doping in a crystalline NiCuMn trimetallic alloy, followed by dealloying in an oxygen‐rich environment, is presented. This process produces a highly uniform, 3D flaky nanoporous microstructure with exceptional electrochemical energy storage capabilities. The synthesized electrode demonstrates a remarkable specific capacitance of 1835 F cm−3 at an ultrahigh current density of 10 A cm−3 along with an excellent rate capability of ≈62%. In contrast, the carbon‐free NiCuMn alloy shows 900 F cm−3 capacitance with only 35% retention under similar test conditions. A symmetric supercapacitor showcases an impressive energy density of 120.4 Wh L−1 at a power density of 850 W L−1. It also exhibits remarkable rate capability of ≈50% and excellent cyclic stability, maintaining 96.5% of its capacity after 10000 cycles. The exceptional performance of the developed electrode is attributed to its carbon‐doped unique hierarchical microstructure that ensures efficient and rapid charge transport due to large surface area and high electrical conductivity.

This study presents a novel approach, aimed at developing sustainable energy material. Green synthesis of nickel oxide nanoparticles (NiO NPs) is done using waste tea extract. The as‐synthesized NiO NPs are tested for electro‐oxidation of ethanol, demonstrating a notable reduction in overpotential at 0.44 V (in 1 M KOH + 1 M ethanol) from 0.67 V (in 1 M KOH) at a current density of 10 mA cm−2. Comparative analysis with a benchmark platinum‐based electrocatalyst reveals that the green NiO‐NPs exhibited superior intrinsic kinetics and mechanistic performance, with a lower Tafel slope of 102 mV dec−1 and charge transfer resistance of 26 Ω. These results underline the efficiency and economic viability of using a bioinspired method for synthesizing NiO NPs, while also stressing the potential for upcycling waste tea. This innovative approach offers significant implications for the development of ecofriendly and sustainable energy conversion technologies.

Graphical representation of electrochemical hydrogen production facilitated by anisotropic Co3O4 nanorods deposited on Ni foam and glassy carbon electrode across different pH levels and substrates.

Coordination environment regulation on the CO2R activity of Cu2-DACs supported on C, N, or B co-doped graphene using ab initio simulations.

Plasma gasification is a promising technology for integration with molten carbonate fuel cell (MCFC) and chemical looping reforming (CLR) process for effective utilization of refused derived fuels.