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Oxygen Reduction Reaction
In article number 2305062, Tianyu Xia, Han Gao, Haizhong Guo, and co‐workers develop the quasi‐octahedral core‐shell electrocatalyst with L10‐PtCo as the core and ultrathin, strained PtIr layer as the shell. It delivers impressive activity and durability in the oxygen reduction reaction (ORR). In the dual catalysis of ORR and oxygen evolution reaction, a small overpotential...
PtIr‐based nanostructures are fascinating materials for application in bifunctional oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) catalysis. However, the fabrication of PtIr nanocatalysts with clear geometric features and structural configurations, which are crucial for enhancing the bifunctionality, remains challenging. Herein, PtCo@PtIr nanoparticles are precisely designed...
High‐performance optoelectronic nonvolatile memory is promising candidate for next‐generation information memory devices. Here, a floating‐gate memory is constructed based on van der Waals heterostructure, which exhibits a large storage window ratio (≈75.5%) and an extremely high on/off ratio (107), as well as an ultrafast electrical writing/erasing speed (40 ns). The enhanced performance enables...
Capacitive Pressure Sensors
In article number 2205324, Guorong Shan, Miao Du, and co‐workers develop a method of liquid‐liquid interface contact (MLLC) to pretreat the pristine poly(3,4‐ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) solutions. By dripping this resultant ink, a ring‐like film with interconnected networks that prefers high conductivity can be prepared due to coffee ring effect...
With commercial electronics transitioning toward flexible devices, there is a growing demand for high‐performance polymers such as poly(3,4‐ethylenedioxythiophene): poly(styrene sulfonate) (PEDOT:PSS). Previous breakthroughs in promoting the conductivity of PEDOT:PSS, which mainly stem from solvent‐treatment and transfer‐printing strategies, remain as inevitable challenges due to the inefficient,...
Recent years have witnessed the rapid development of sustainable materials. Along this line, developing biodegradable or recyclable soft electronics is challenging yet important due to their versatile applications in biomedical devices, soft robots, and wearables. Although some degradable bulk hydrogels are directly used as the soft electronics, the sensing performances are usually limited due to...
A simple and effective approach is demonstrated to fabricate tough metallosupramolecular hydrogel films of poly(acrylic acid) by one‐pot photopolymerization of the precursor solution in the presence of Zr4+ ions that form coordination complexes with the carboxyl groups and serve as the physical crosslinks of the matrix. Both as‐prepared and equilibrated hydrogel films are transparent, tough, and stable...
Nanoparticles covered with surfactants are often used to study particle motion patterns and self‐assembly processes in solutions. Surfactants have influence on the interparticle interactions and therefore on the particle motion tracks and final patterns. In this study, CoPt nanoparticles are synthesized in aqueous solution without any surfactant. In situ transmission electron microscopy observation...
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