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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...
Disordered crystallization and poor phase stability of mixed halide perovskite films are still the main factors that compromise the performance of inverted wide bandgap (WBG; 1.77 eV) perovskite solar cells (PSCs). Great difficulties are evidenced due to the very different crystallization rates between I‐ and Br‐based perovskite components through DMSO‐alone assisted anti‐solvent process. Here, a...
Radiative cooling materials that can dynamically control solar transmittance and emit thermal radiation into cold outer space are critical for smart thermal management and sustainable energy‐efficient buildings. This work reports the judicious design and scalable fabrication of biosynthetic bacterial cellulose (BC)‐based radiative cooling (Bio‐RC) materials with switchable solar transmittance, which...
High‐efficiency and low‐cost bifunctional electrocatalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), as well as gel electrolytes with high thermal and mechanical adaptability are required for the development of flexible batteries. Herein, abundant Setaria Viridis (SV) biomass is selected as the precursor to prepare porous N‐doped carbon tubes with high specific surface...
Heterogeneous catalytic mediators have been proposed to play a vital role in enhancing the multiorder reaction and nucleation kinetics in multielectron sulfur electrochemistry. However, the predictive design of heterogeneous catalysts is still challenging, owing to the lack of in‐depth understanding of interfacial electronic states and electron transfer on cascade reaction in Li–S batteries. Here,...
Surface heterojunction has been regarded as an effective method to improve the device efficiency of perovskite solar cells. Nevertheless, the durability of different heterojunction under thermal stress is rarely investigated and compared. In this work, benzylammonium chloride and benzyltrimethylammonium chloride are utilized to construct 3D/2D and 3D/1D heterojunctions, respectively. A quaternized...
This work focusses on developing a hybrid enzyme biofuel cell‐based self‐powered biosensor with appreciable stability and durability using murine leukemia fusion gene fragments (tDNA) as a model analyte. The cell consists of a Ti3C2Tx/multiwalled carbon nanotube/gold nanoparticle/glucose oxidase bioanode and a Zn/Co‐modified carbon nanotube cathode. The bioanode uniquely exhibits strong electron transfer...
Atomically thin monolayer semiconducting transition metal dichalcogenides (TMDs), exhibiting direct band gap and strong light‐matter interaction, are promising for optoelectronic devices. However, an efficient band alignment engineering method is required to further broaden their practical applications as versatile optoelectronics. In this work, the band alignment of two vertically stacked monolayer...
Electrochemical CO2 reduction to valuable ethylene and ethanol offers a promising strategy to lower CO2 emissions while storing renewable electricity. Cu‐based catalysts have shown the potential for CO2‐to‐ethylene/ethanol conversion, but still suffer from low activity and selectivity. Herein, the effects of surface and interface structures in Cu‐based catalysts for CO2‐to‐ethylene/ethanol production...
2D Semiconductors are promising in the development of next‐generation photodetectors. However, the performances of 2D photodetectors are largely limited by their poor light absorption (due to ultrathin thickness) and small detection range (due to large bandgap). To overcome the limitations, a strain‐plasmonic coupled 2D photodetector is designed by mechanically integrating monolayer MoS2 on top of...
The severe charge recombination and the sluggish kinetic for oxygen evolution reaction have largely limited the application of hematite (α‐Fe2O3) for water splitting. Herein, the construction of Cu2S/Fe2O3 heterojunction and discover that the formation of covalent SO bonds between Cu2S and Fe2O3 can significantly improve the photoelectrochemical performance and stability for water splitting is reported...
In article number 2100320, Jian‐Jun Wang, Artur Braun, and co‐workers demonstrate that the formation of covalent S—O bonds between Cu2S and Fe2O3 can significantly improve the performance of the Cu2S/Fe2O3 heterojunction photoelectrode for photoelectrochemical water splitting owning to the enhanced charge separation and transfer, and reduced charge recombination rate.
2D semiconductors have attracted tremendous attention as an atomically thin channel for transistors with superior immunity to short‐channel effects. However, with atomic thin structure, the delicate 2D lattice is not fully compatible with conventional lithography processes that typically involve high‐energy photon/electron radiation and unavoidable polymer residues, posing a key limitation for high...
Hydrogenation of diesters to diols is a vital process for chemical industry. The inexpensive Cu+/Cu0‐based catalysts are highly active for the hydrogenation of esters, however, how to efficiently tune the ratio of Cu+/Cu0 and stabilize the Cu+ is a great challenge. In this work, it is demonstrated that doped Ti ions can tune the ratio of Cu+/Cu0 and stabilize the Cu+ by the TiOCu bonds in Ti‐doped...
Owing to their safety, high energy density, and long cycling life, all‐solid‐state lithium batteries (ASSLBs) have been identified as promising systems to power portable electronic devices and electric vehicles. Developing high‐performance solid‐state electrolytes is vital for the successful commercialization of ASSLBs. In particular, polymer‐based composite solid electrolytes (PCSEs), derived from...
Gd chelates have occupied most of the market of magnetic resonance imaging (MRI) contrast agents for decades. However, there have been some problems (nephrotoxicity, non‐specificity, and low r1) that limit their applications. Herein, a wet‐chemical method is proposed for facile synthesis of poly(acrylic acid) (PAA) stabilized exceedingly small gadolinium oxide nanoparticles (ES‐GON‐PAA) with an excellent...
As lithium‐ion batteries continue to climb to even higher energy density, they meanwhile cause serious concerns on their stability and reliability during operation. To make sure the electrode materials, particularly cathode materials, are stable upon extended cycles, surface modification becomes indispensable to minimize the undesirable side reaction at the electrolyte–cathode interface, which is...
Emerging evidence indicates that exosomes derived from gastric cancer cells enhance tumor migration and invasion through the modulation of the tumor microenvironment. However, it remains a major problem to detect cancer‐specific exosomes due to technical and biological challenges. Most of the methods reported could not achieve efficient detection of tumor‐derived exosomes in the background of normal...
Photoinduced memory devices with fast program/erase operations are crucial for modern communication technology, especially for high‐throughput data storage and transfer. Although some photoinduced memories based on 2D materials have already demonstrated desirable performance, the program/erase speed is still limited to hundreds of micro‐seconds. A high‐speed photoinduced memory based on MoS2/single‐walled...
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