Parametric investigation ensures the optimal design and commercialization of high-quality products. This study employs numerical approach to evaluate the performance of a zinc-air fuel cell, focusing on the influence of design and operational parameters. A transient two-dimensional (2D) mathematical model, incorporating the effect of flowing potassium hydroxide (KOH) electrolyte is developed and verified

A one-step hydrothermal method is employed to synthesize a composite of nickel-cobalt sulfide (NiCo2S4) integrated with reduced graphene oxide (rGO) as an electrode for energy storage applications in the supercapcitor. The distribution of NiCo2S4 nanoparticles on the rGO surface is optimized to be enhance the supercapacitor performance. The resulting NiCo2S4/rGO composite showed impressive electrochemical

Anion exchange membrane fuel cells (AEMFCs) have emerged as a promising alternative to commercialized proton exchange membrane fuel cells because they can enable much lower costs by using cheaper materials, especially non-precious metal electrocatalysts. However, the commercialization of AEMFCs faces several technical challenges, including water management during operation. More specifically, achieving

In the field of supercapacitors, carbide MXenes have recently received significant attention as pseudocapacitive electrode materials due to their unique multilayered structure, high metallic conductivity, pseudocapacitive charge storage mechanism and tunable surface terminations. Herein, synthesis and electrochemical performance of 2D molybdenum carbide (Mo2C) MXene-based electrode is presented for

With the rapid development of modern science and technology, it is necessary to search for alternative nanostructured materials towards the application of electrochemical (EC) sensors, catalysts, surface-enhanced Raman scattering (SERS) and biomedicine. However, such type of nanomaterials is limited due to the lack of synthesis procedures and unique set of physical and chemical properties. This review

It has come to our attention that one of the curves was missing in Fig. 7d in the final published version of our paper. The correct Figure is below. Download: Download high-res image (726KB) Download: Download full-size image Figure 7. Comparison of the calculated and experimentally determined pH distributions for 8 rectangular pulses with a duration of 10 ms and a pulse repetition rate of 1 s-1. The

In this study, we demonstrate that localized electrochemical impedance spectroscopy (LEIS) can successfully probe the solid-liquid interface of a model gold surface in low-concentrated aqueous electrolytes. The approach utilizes scanning electrochemical microscopy (SECM) under potential control of the sample, marking a notable improvement over previous SECM-based LEIS studies, which were conducted

Ti/IrO2-Ta2O5 electrode is widely used in the electrochemical industry with oxygen evolution, however, the knowledge is still limited about the passive film structure and its variation in the processes of deactivation. In this work, the evolution of passive film under the catalytic coating during accelerated life test has been studied using FIB-TEM and other methods. The results show that the as-prepared

Hemp has been widely used for cadmium (Cd) remediation. However, its remediation efficiency needs to be improved. Chitooligosaccharides can enhance plant resistance and growth; however, their effects on hemp for Cd-remediation remain unclear. Herein, a greenhouse pot experiment was conducted to investigate the effects of three doses (0, 22.5, and 45 μg m−2) of chitooligosaccharides (COS), chitin-oligosaccharides

A well-known problem of lead acid batteries (LABs) is the limited charge efficiency and cyclability, due to the heavy electrode degradation during the discharging-charging process. Specifically, grid corrosion remains a detrimental issue to solve in flooded LAB. In this regard, it was observed that the addition of carbons in the positive active mass (PAM) of LABs improves the battery performances specifically

The synergistic effects of Al on Cr(III) passivation in a family of (FeCoNi)100-x-y-Crx-Aly (at.%) complex concentrated alloys (CCAs), where x = (0, 4, 10, 13, 16) and y = (0, 3, 6, 9, 13) were investigated. Homogenized solid solution alloys containing 10 at.% Cr intentionally selected below the stainless steel threshold of 12 at.% achieved excellent passivation by forming a Cr(III) rich film containing

Tissue engineering and regenerative medicine are interdisciplinary fields that aim to repair structural or functional defects in target tissues by replicating the physiological characteristics and microenvironments of organs. Despite advancements in nanotechnology and biomimetics, effectively controlling cell functions remains challenging due to discrepancies between in vitro and in vivo cellular microenvironments

Partial nitrification (PN), is a promising nitrogen removal technology in wastewater treatment. Contrary to the dogma that low dissolved oxygen (DO) is more conducive to achieving PN, this study successfully established PN within 7 days under high DO conditions (> 6 mg/L). Ultra-stable PN was maintained over 143 days with an average nitrite accumulation ratio of 98 % treating real domestic wastewater

Fermentative Firmicutes species are key players in anaerobic digestion; however, their niche differentiation based on carbohydrate utilization in full-scale systems remains unclear. In this study, we investigated niche differentiation among four major Firmicutes classes using a genome-centric approach, reconstructing 39 high-quality metagenome-assembled genomes. Limnochordia and Clostridia exhibited

Partial denitrification coupled with anammox is a promising approach for sustainable nitrogen removal from wastewater. However, this coupling can be influenced by hydrazine (N2H4) released by anammox bacteria. This study aimed to reveal how N2H4 regulates partial denitrification. Short-term batch experiments showed that 0.5 to 10 mg N/L of N2H4 promoted nitrite (NO2−) accumulation, likely by inhibiting

Research studies on Metal Organic Frameworks (MOF) based composites and their potential applications in environmental engineering and pollution control have recently emerged. An attractive material to form MOF composites is biochar (BC); a low-cost, highly porous carbonaceous by-product of biomass pyrolysis. This paper presents a critical review on MOF-biochar composites, focusing on fabrication, characterisation