Cobalt‐based oxides have been investigated as potential alternatives to Ir/Ru‐based oxides for catalyzing the oxygen evolution reaction (OER) in acidic media. Past research, however, is mainly focused on the spinel oxide structure so far. Exploring alternative crystal structures is essential for expanding the material library and developing highly efficient OER catalysts for acidic environments. As a proof of concept, we demonstrate that Co‐based perovskite oxides can drive acidic OER effectively. Appling hard/soft X‐ray absorption spectroscopy (hXAS/sXAS) characterizations, we show that the La and Ce doped SrCoO 3 (denoted as LSC and CSC, respectively) have a bulk‐average Co oxidation state close to 3+ and surface‐dominant low‐spin Co III species. Electrochemical analysis reveals that they only show one Co redox pair, similar to CoOOH in acidic environments. The recorded Tafel slopes are around ∼65 mV dec −1 , comparable to the benchmarking Ir/Ru‐based catalysts. The combination of the spectroscopic and electrochemical findings presented here highlights the important role of low‐spin Co III species in catalyzing OER in acidic environments and contributes to the rational design of non‐noble metal OER catalysts.

Perovskite‐type metal oxides are employed as cathodes in Zn‐air batteries (ZABs) and Zn‐ion batteries (ZIBs). While research on ZABs is extensively documented, their application in ZIBs is a more recent area of investigation. The fundamental principles of these battery technologies and their respective reaction mechanisms are reviewed. We identify the crucial structural and compositional parameters that dictate electrochemical performance. Although perovskite‐type metal oxide materials are frequently integrated with carbon materials, their contribution is often not adequately emphasized in research articles. This review underscores the pivotal influence of carbon‐based materials on the final electrocatalytic activity, positioning them not merely as additives but as active components that significantly impact the reaction mechanism and the overall properties of the metal oxide. Notably, perovskite metal oxides can form B–O–C interactions (where B represents a metal) with carbon materials, substantially affecting their performance. Furthermore, this review provides a comprehensive analysis of the diverse mixing strategies currently utilized, the nature of the most commonly employed carbon materials, and their electrochemical response in both ZABs and ZIBs. Finally, we discuss future perspectives and existing challenges in the pursuit of highly active and efficient perovskite metal oxide cathodes for these batteries.

The integration of renewable energy sources, particularly solar photovoltaics (PV), has increased the complexity of real‐time data management. Heterogeneous devices with varying control cycles and frequent missing data further complicate this process. Traditional rule‐based or device‐specific methods require extensive data collection and parameter tuning, making them impractical for large‐scale systems with diverse devices and time resolutions. Recent advances in deep learning enable zero‐shot forecasting, even when target devices are absent from training data. However, their generalization performance in zero‐shot cross‐frequency forecasting—predicting unseen devices and time resolutions—remains largely unexplored. To address this gap, a large‐scale multiresolution dataset is constructed with over 100 million data points, including solar irradiance and PV generation data across several time resolutions. An empirical analysis is conducted to evaluate various state‐of‐the‐art forecasting approaches, training on multiple time resolutions (e.g., 1 s, 1 min, 1 h) and testing on untrained resolutions (e.g., 5 min, 30 min). The results show that forecasting performance varies with time resolution, with different architectures excelling at different granularities. Motivated by this finding, a mixture‐of‐experts framework is proposed to dynamically combine models by time resolution, enhancing robustness and generalization. Our findings offer insights into scalable, efficient real‐time forecasting for renewable energy.

This study introduces two new fluorine‐free ionic liquids (ILs) produced by coupling biomass‐derived heterocyclic anions, i.e., tetrahydro‐2H‐pyran‐4‐carboxylate (THP) and furan‐3‐carboxylate (3‐FuA), and tetrahydroxyphosphonium cation (P 4444 ). The (P 4444 )(3‐FuA) IL exhibits slightly higher thermal stability, displays a lower glass‐transition temperature and significantly higher ionic conductivity than (P 4444 )(THP). This improvement arises from π‐electron delocalization in the (3‐FuA) anion, by dispersing the negative charge over the ring, weakening the cation–anion attractions, and thus enhancing the ion mobility. Owing to the favorable ion transport characteristics, (P 4444 )(3‐FuA) performs exceptionally well as a supercapacitor electrolyte. When paired with multiwalled carbon nanotubes (MWCNT)‐based electrodes, (P 4444 )(3‐FuA) delivers an areal capacitance of 430 mF cm −2 at 2 mV s −1 , an energy density of 86 µWh cm −2 at 0.298 mA cm −2 , and a power density of 1492 µW cm −2 at 0.995 mA cm −2 , while maintaining 97% Coulombic efficiency after 6 000 cycles at 60°C. In comparison, the (P 4444 )(THP) IL demonstrate a lower capacitance performance, albeit with robust long‐term stability. Overall, both the ILs display enhanced capacitance with increasing temperature, underscoring their potential as fluorine‐free electrolytes for supercapacitors operating under elevated thermal conditions.

Nickel‐rich layered cathodes, LiNi x Mn y Co 1 −x −y O 2 (NMC), are promising materials for next‐generation Li‐ion batteries due to their high energy/power densities; however, capacity fading remains a major limitation. While fluorinated electrolytes have enabled optimal performance, their environmental and safety issues prompt the investigation of fluorine‐free alternatives. Here, we evaluate a fluorine‐free electrolyte based on lithium bis(oxalato)borate in NMC811||Si–graphite full cells operated at low and high cutoff voltages, comparing its performance with that of a LiPF 6 ‐based electrolyte. The reactions at the cathode–electrolyte interface (CEI) are the primary cause of capacity fade, leading to electrolyte decomposition, layer disorder, and irreversible phase transitions. Increasing the cutoff voltage and the use of a fluorine‐free electrolyte exacerbate these reactions, resulting in more rapid capacity loss. Differential scanning calorimetry characterization of harvested electrodes from cycled cells with both electrolytes indicates that the anode exhibits lower thermal stability than the cathode and that the thermal stability of the anode is enhanced when using the fluorine‐free electrolyte. Overall, the results indicate that the fluorine‐free electrolyte performance is limited at high cutoff voltage by the cathode and highlights the need for improved CEI‐based additives or cathode coatings to allow competitive performance of more environmentally friendly electrolytes with fluorine‐free components.

The transition toward a circular and sustainable bioeconomy requires new catalytic technology to transform renewable biomass into high‐value chemicals and fuels. Heterogeneous catalysts have demonstrated themselves to be key devices in this regard, providing operational resilience, recoverability, and compatibility with industrially continuous‐flow operation. This review provides an overview of the promise of heterogeneous catalysts, described as the selective upgrading of four important biomass‐derived platform molecules furfural, 5‐hydroxymethylfurfural (HMF), levulinic acid (LA), and glycerol. Importantly, the catalyst families including metal oxides, supported metals, zeolites, metal–organic frameworks (MOFs), porous organic polymers (POPs), and carbon‐based materials have been extensively studied in structural features, active sites, and reaction mechanisms in processes such as hydrogenation, etherification, dehydration, and hydrodeoxygenation. Particular focus is given to the synergy of acid–base and redox functionalities, metal–support interactions, and multifunctional architectures that facilitate tandem and cascade reactions. The review closes by summarizing current limitations and providing insights for next‐generation catalytic systems designed for scalable, selective, and green biorefinery purposes.

We report that coating a Ni sheet electrode with a patterned mosaic of PTFE islands having uniform diameters (0.10–0.15 mm) and proximity to each other, and which cover 2% of the area of the electrode, decreases its overpotential for hydrogen production by a remarkable 0.15–0.21 V at current densities of 2–15 mA cm −2 in 1 M KOH (PTFE = polytetrafluoroethylene). This correlates to a ≈20‐fold amplification in the rate of hydrogen generation by the electrode at a fixed electrode voltage of −1.15 V (vs. Hg/HgO) relative to control bare electrodes. The effect originates in the low surface energy of PTFE, which induces newly produced hydrogen to preferentially form bubbles on the PTFE surfaces, leaving the adjacent, uncoated Ni surface free of bubbles and able to catalyse hydrogen production with high energy efficiency. Fifteen different patterns of PTFE islands, incorporating three distinct island diameters, that covered 2%–20% of the electrode surface, were prepared and systematically studied in five replicates each, on large Ni sheet electrodes. The studies demonstrate statistically significant declines in overpotentials and onset potentials for electrochemical hydrogen production. Ni electrodes are widely used in commercial alkaline water electrolysis cells to produce renewable (‘green’) hydrogen.

The lifetime of Li‐ion batteries (LIB) depends on the amount of Li ions and electrons (= active Li), definingLi inventory and cell capacity and can be limited by active Li loss (ALL) at the negative electrode (= anode), e.g., via electrolyte reduction. Given cathode interference‐reasoned challenges for anode R&D in a LIB, Li metal is commonly applied as a Li source within a half cell. However, applied test protocols do not represent the full cell situation, as (1) anodes get fully recharged each cycle, i.e., not consider ALL from previous cycles and (2) cycling with a fixed charge cut‐off potential (COP) can lead to pronounced capacity deviations as, e.g., already marginal overpotential reaches COP notably earlier, i.e., at lower charge capacities, which is in particular relevant for plateau‐like charge profiles like graphite. Here, an advanced charging protocol via mimicking capacity degradation is provided, which adjusts the specific charge capacities of an individual cycle to previous cycle discharge capacity; hence it considers previous ALL and avoids the COP issue. This allows “fast screening” anode R&D by simulating full cell conditions, e.g., mass loading, N/P ratio, state‐of‐charge, and even prelithiation degree, as exemplarily shown for “next generation” anodes.

Polymer‐bonded Nd–Fe–B magnets, made from hard magnetic powder and a polymer binder, are essential in many high‐tech applications. The growing demand in energy‐conversion devices calls for a more circular and versatile approach to their production. This study presents a sustainable approach to fabricate anisotropic polymer‐bonded Nd–Fe–B magnets using recycled powder from end‐of‐life (EOL) hot‐deformed magnets. Employing laser powder bed fusion with a low CO 2 footprint polyamide 12 matrix in combination with magnetic powder enables production of complex geometries. Two methods are compared for converting EOL hot‐deformed magnets into powder and the resulting performance of printed bonded magnets with these powders. Both powders have an elongated shape with the magnetic easy axis oriented perpendicular to the particle's length. Utilizing these anisotropic powders, based on a previously studied alignment mechanism, anisotropic bonded magnets are fabricated with over 60% higher magnetic performance compared to those made from EOL sintered magnet powders in 3D printing. The fabricated magnets have a remanence of 0.34 T and coercivity of 1238 kA m −1 . The findings demonstrate a pathway toward turning parts of the magnet market into a more circular economy by reducing reliance on primary Nd–Fe–B sources and enhancing efficiency of magnetic powder use.