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Oxygen Reduction Reaction
In article number 2401221, Yongsheng Fu and co‐workers propose a gradient nitrogen‐doping strategy for preparing nitrogen‐deficient graphene and nitrogen‐rich carbon nanotubes encapsulated cobalt nanoparticles catalysts. The gradient nitrogen doping in catalysts creates directional potential differences between the carbon layers, facilitating oriented electron transfer between...
Nitrogen doping has been recognized as an important strategy to enhance the oxygen reduction reaction (ORR) activity of carbon‐encapsulated transition metal catalysts (TM@C). However, previous reports on nitrogen doping have tended to result in a random distribution of nitrogen atoms, which leads to disordered electrostatic potential differences on the surface of carbon layers, limiting further control...
X‐ray detection and imaging are widely used in medical diagnosis, product inspection, security monitoring, etc. Large‐scale polycrystalline perovskite thick films possess high potential for direct X‐ray imaging. However, the notorious problems of baseline drift and high detection limit caused by ions migration are still remained. Here, ion migration is reduced by incorporating 2D perovskite into 3D...
Singlet oxygen (term symbol 1Δg, hereafter 1O2), a reactive oxygen species, has recently attracted increasing interest in the field of rechargeable batteries and electrocatalysis and photocatalysis. These sustainable energy conversion and storage technologies are of vital significance to replace fossil fuels and promote carbon neutrality and finally tackle the energy crisis and climate change. Herein,...
Heterostructures are widely employed in photocatalysis to promote charge separation and photocatalytic activity. However, their benefits are limited by the linkages and contact environment at the interface. Herein, violet phosphorus quantum dots (VPQDs) and graphitic carbon nitride (g‐C3N4) are employed as model materials to form VPQDs/g‐C3N4 heterostructures by a simple ultrasonic pulse excitation...
Developing efficient water‐splitting electrocatalysts to accelerate the slow oxygen evolution reaction (OER) kinetics is urgently desired for hydrogen production. Herein, ultralow phosphorus (P)‐doped NiFe LDH (NiFePx LDH) with mild compressive strain is synthesized as an efficient OER electrocatalyst. Remarkably, NiFePx LDH with the phosphorus mass ratio of 0.32 wt.% and compressive strain ratio...
The safety, low cost, and high power density of aqueous Zn‐based devices (AZDs) appeal to large‐scale energy storage. Yet, the presence of hydrogen evolution reaction (HER) and chemical corrosion in the AZDs leads to local OH− concentration increasement and the formation of ZnxSOy(OH)z•nH2O (ZHS) by‐products at the Zn/electrolyte interface, causing instability and irreversibility of the Zn‐anodes...
Nanodrugs
An arginyl‐glycyl‐aspartic acid peptide‐modified carboline ruthenium complex KS‐Ru self‐assembled in a pH‐sensitive manner. It entered the lysosomes and formed nanoflowers, leading to lysosomal swelling. In addition, it entered the nucleus to damage DNA, inducing immunogenic cell death. Thus, it realized a dual impact on tumor growth and metastasis through synergistic chemotherapy and immunogenic...
Several DNA‐damaging antitumor agents, including ruthenium complexes, induce immunogenic cell death (ICD). In this study, an arginyl‐glycyl‐aspartic acid (RGD) peptide‐modified carboline ruthenium complex (KS‐Ru) is synthesized as a chemotherapeutic nanodrug and an ICD inducer. The RGD peptide, an integrin ligand, provides tumor‐specific targeting and promotes self‐assembly of the KS‐Ru complex. The...
Ensuring an appropriate nitrite level in food is essential to keep the body healthy. However, it still remains a huge challenge to offer a portable and low‐cost on‐site food nitrite analysis without any expensive equipment. Herein, a portable integrated electrochemical sensing system (IESS) is developed to achieve rapid on‐site nitrite detection in food, which is composed of a low‐cost disposable...
Point‐of‐care testing (POCT) is experiencing a groundbreaking transformation with microfluidic chips, which offer precise fluid control and manipulation at the microscale. Nevertheless, chip design or operation for existing platforms is rather cumbersome, with some even heavily depending on external drivers or devices, impeding their broader utilization. This study develops a unique programmable gravity...
The hydrogen evolution reaction (HER) activity of defect‐stabilized low‐Pt‐loading catalysts is closely related with defect type in support materials, while the knowledge about the effect of higher‐dimensional defects on the property and activity of trapped Pt atomic species is scarce. Herein, small size (5–10 nm) TiO2 nanoparticles with abundant surface step defects (one kind of line defect) are...
With the advent of wireless technology, magnetic–carbon composites with strong electromagnetic wave (EMW) absorption capability in low‐/middle‐frequency range are highly desirable. However, it remains challenging for rational construction of such absorbers bearing multiple magnetic components that show uniform distribution and favorable magnetic loss. Herein, a facile metal‐oxo cluster (MOC) precursor...
Perovskites
In article number 2307960, Xiao Wang, Longbin Qiu, and co‐workers developed an ultrahigh humidity treatment strategy to facilitate the effective diffusion of formamidinium iodide from the top surface to the buried bottom interface on the sequential vapor‐deposited bilayer structure. High‐efficiency and stable perovskite solar cells deposited by a sequential vapor deposition process with...
The quality of two‐step processed perovskites is significantly influenced by the distribution of organic amine salts. Especially, modulating the distribution of organic amine salts remains a grand challenge for sequential vapor‐deposited perovskites due to the blocking effect of bottom compact PbI2. Herein, an ultrahigh humidity treatment strategy is developed to facilitate the diffusion of formamidinium...
The promising cyclometalated iridium (III) complexes have been proved to possess great potential in vacuum−deposited organic light−emitting diodes (OLEDs) applications for full−color displays and white solid−state lighting sources. Herein, based on the unique bidentate ligand of dibenzo[a,c]phenazine (dbpz) group with strong conjugated effect of aromatic rings for red emission, four novel [3+2+1]...
Transition metals are excellent active sites to activate peroxymonosulfate (PMS) for water treatment, but the favorable electronic structures governing reaction mechanism still remain elusive. Herein, the authors construct typical d‐orbital configurations on iron octahedral (FeOh) and tetrahedral (FeTd) sites in spinel ZnFe2O4 and FeAl2O4, respectively. ZnFe2O4 (136.58 min−1 F−1 cm2) presented higher...
The preservation and accessibility of pores are prerequisites to the application of metal–organic frameworks (MOFs). Activation is a key step to eliciting rich features of pores, but it needs a repeated solvent‐exchange process which is tedious and time/cost‐consuming. Herein, a facile strategy for highly‐efficient activation of MOFs utilizing rotating packed bed is proposed. With the tremendous enhancement...
Sodium manganese hexacyanoferrate (NaMnHCF) is an attractive candidate as a cathode material for sodium‐ion batteries due to its low cost and high energy density. However, its practical application is hindered by poor electrochemical stability caused by the Jahn‐Teller effect of Mn and the unstable structure of NaMnHCF. Here, this paper aims to address this issue by introducing highly stable AMnHCF...
Perovskite solar cells have rapidly developed as a promising technology for the next generation of low‐cost photovoltaics, receiving enormous attention from researchers and industries. Compared to traditional semiconducting materials, metal halide perovskite exhibits outstanding tolerance to extrinsic ions. At a certain range of doping concentration, the interstitial occupancy of extrinsic ions provides...
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