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Platinum-based materials exhibit a broad spectrum of biological activities, including antioxidant, anti-inflammatory, antimicrobial, and pro-collagen synthesis properties, making them particularly useful for various biomedical applications. This review summarizes the biological effects and therapeutic potential of platinum-based active ingredients in dermatological and skincare applications. We discuss their synthesis methods and their antioxidant, anti-inflammatory, antimicrobial, and collagen synthesis properties, which play essential roles in treating skin conditions including psoriasis and acne, as well as enhancing skin aesthetics in anti-aging products. Safety and sustainability concerns, including the need for green synthesis and comprehensive toxicological assessments to ensure safe topical applications, are also discussed. By providing an up-to-date overview of current research, we aim to highlight both the potential and the current challenges of platinum-based active ingredients in advancing dermatology and skincare solutions. [ABSTRACT FROM AUTHOR]

Two typical Cu-based complex catalysts with piperazine (PR) and p-phenylenediamine (pPDA) ligands were designed to elucidate whether the ligands can tailor the reduction behavior of the Cu species and thus modulate their electrochemical CO2 reduction reaction (eCO2RR) activity. Specifically, Cu-PR underwent a significant in situ transformation into Cu nanoparticles enriched with a Cuδ+/Cu0 interface for high eCO2RR activity, compared to Cu-pPDA. This finding reveals the importance of ligand engineering in modulating the eCO2RR performance of Cu-based complexes. [ABSTRACT FROM AUTHOR]

We report here an asymmetric N,S-coordinated cobalt-based single-atom catalyst with sulfur (S)-bridge ligands (Co–N/S–C) for the oxygen reduction reaction (ORR). The Co–N/S–C exhibits a half-wave potential (E1/2) of 0.908 V versus RHE, outperforming most state-of-the-art ORR catalysts. Theoretical calculations indicate that the CoN3SC10–S moiety facilitates the ORR kinetics by optimizing the adsorption of intermediates. This work provides new insights into the design of single-atom catalysts for electrocatalysis through heteroatom-bridge ligand engineering. [ABSTRACT FROM AUTHOR]

Atomically dispersed iron–nitrogen–carbon (FeNC) catalysts have sparked great interest by virtue of the highly active isolated FeN4 sites. The catalysts with pyrolysis treatment usually induce inevitable FeN4 sites agglomeration, leading to fast degradation in catalytic activity. Herein, a pre‐coordinated protection strategy is proposed to eliminate the aggregation of Fe atoms by suppressing the thermal migration during the pyrolysis process. To this end, the S atom is introduced into the graphitic support by enhancing the metal‐support interaction. The proposed atomic structure is revealed by multiple advanced characterizations including Fe Mössbauer spectroscopy, X‐ray absorption spectroscopy, and theoretical calculations. By employing S atom into the structure, the center atom Fe is oxidized to a higher valence, improving the bonding energy with the graphitic support, which accordingly endows catalyst anti‐sintering capacity and improved catalytic activity. Compared to commercial Pt/C and the reported catalyst with secondary pyrolysis, the proposed catalysts exhibit enhanced ORR activity in alkaline media (E1/2 = 0.91 V). This work provides a new avenue toward optimizing and improving ORR performance of atomically dispersed Fe catalysts. [ABSTRACT FROM AUTHOR]

Electrochemical coupling of biomass valorization with carbon dioxide (CO2) conversion provides a promising approach to generate value-added chemicals on both sides of the electrolyzer. Herein, oxygen-vacancy-rich indium oxyhydroxide (InOOH-OV) is developed as a bifunctional catalyst for CO2 reduction to formate and 5-hydroxymethylfurfural electrooxidation to 2,5-furandicarboxylic acid with faradaic efficiencies for both over 90.0% at optimized potentials. Atomic-scale electron microscopy images and density functional theory calculations reveal that the introduction of oxygen vacancy sites causes lattice distortion and charge redistribution. Operando Raman spectra indicate oxygen vacancies could protect the InOOH-OV from being further reduced during CO2 conversion and increase the adsorption competitiveness for 5-hydroxymethylfurfural over hydroxide ions in alkaline electrolytes, making InOOH-OV a main-group p-block metal oxide electrocatalyst with bifunctional activities. Based on the catalytic performance of InOOH-OV, a pH-asymmetric integrated cell is fabricated by combining the CO2 reduction and 5-hydroxymethylfurfural oxidation together in a single electrochemical cell to produce 2,5-furandicarboxylic acid and formate with high yields (both around 90.0%), providing a promising approach to generate valuable commodity chemicals simultaneously on both electrodes. Electrochemical coupling of biomass valorization with CO2 conversion provides a promising approach to generate value-added chemicals on both sides. However, bifunctional catalysts are lacking. Here the authors report oxygen-vacancy-rich indium oxyhydroxide as a bifunctional catalyst for CO2 reduction to formate and 5-hydroxymethylfurfural electrooxidation to 2,5-furandicarboxylic acid with faradaic efficiencies for both > 90.0%. [ABSTRACT FROM AUTHOR]

Self‐powered untethered robots that can meander unrestrictedly, squeeze into small spaces, and operate in diverse harsh environments have received immense attention in recent years. As there is not a universal solution that can be applied to power robots with diverse forms, service functions, and a broad size range from nanometers to meters, the design, fabrication, and implementation of power systems with a suitable weight, desired power and operation duration, and adaptiveness to confined spaces and operation conditions represent one of the greatest challenges in robotic research. Herein, an overview of recent progress and challenges in developing the next‐generation energy harvesting and storage technologies is provided, including direct energy harvesting, energy storage and conversion, and wireless energy transmission for robots across all scales. [ABSTRACT FROM AUTHOR]