Long-distance entanglement distribution is essential for both foundational tests of quantum physics and scalable quantum networks. Owing to channel loss, however, the previously achieved distance was ...limited to ~100 kilometers. Here we demonstrate satellite-based distribution of entangled photon pairs to two locations separated by 1203 kilometers on Earth, through two satellite-to-ground downlinks with a summed length varying from 1600 to 2400 kilometers. We observed a survival of two-photon entanglement and a violation of Bell inequality by 2.37 ± 0.09 under strict Einstein locality conditions. The obtained effective link efficiency is orders of magnitude higher than that of the direct bidirectional transmission of the two photons through telecommunication fibers.
Single‐atom catalysts affording multifarious typed metal centers and varied coordination numbers are extensively employed in Li−S realm to promote redox kinetics. Nevertheless, the modulation of ...coordination environment pertaining to local atomic composition to dictate the catalytic efficiency toward sulfur electrochemistry, has remains meaningful yet unexplored thus far. In this contribution, a new type of single‐atomic iron mediator with a designed FeN3P1 coordination structure is reported to boost bidirectional polysulfide conversion in comparison with FeN4 counterpart. Theoretical calculations imply that the substitution by one P atom at the first‐coordination shell of Fe center will be beneficial to strengthen adsorption toward sulfur species and reduce energy barrier for Li2S decomposition. The bidirectional electrocatalytic behavior for polysulfide conversion via FeN3P1 mediator is confirmed by electrokinetic analysis. Consequently, the constructed Li−S battery achieves elongated lifespan with a capacity decay of 0.04% per cycle at 1.0 C and exhibits considerable capacity release of 6.2 mAh cm−2 even under a sulfur loading of 6.4 mg cm−2. This strategy of local composition engineering offers a vivid example in probing the correlation between the definitive structure of single atoms and their catalytic performance in Li−S chemistry.
Single‐atomic Fe moiety affording engineered local coordination chemistry is designed to boost bidirectional polysulfide conversion for Li−S batteries, readily achieving an areal capacity of 6.2 mAh cm−2 even under a sulfur loading of 6.4 mg cm−2.
Sodium‐ion batteries (SIB), as one of the most appealing grid‐scale energy storage devices, have to deal with the trade‐off between the capacity output and rate performance. Utilizing 3D‐printed ...(3DP) anode materials with hybrid sodium storage mechanism and elevated mass loading is promising yet poorly explored. Herein, the design of a prototype ternary composite is reported, MoS2@Bi/N‐doped carbon, as a sodium storage candidate to achieve high reversible capacity (604 mAh g−1 at 0.1 A g−1 with an initial output of 709 mAh g−1) and outstanding rate capability (169.6 mAh g−1 at 15 A g−1), outperforming the state‐of‐the‐art reports. This is realized by delicate structural and interfacial engineering of the composite anode, markedly synergizing the conversion‐typed MoS2, alloy‐typed Bi, and adsorption‐typed N‐doped carbon. Theoretical simulations and operando instrumental analysis elaborate the reasons of the boosted electrochemical performance. Encouragingly, a fully 3DP SIB affording an areal mass loading of up to 11.7 mg cm−2 is demonstrated, retaining a capacity of 114 mAh g−1 at 1.0 A g−1. This work would facilitate the design of 3DP SIB devices with the employment of advanced electrodes harnessing hybrid ion storage features.
He enhance sodium storage performance by integrating various sodium storage mechanisms, including alloy‐based, conversion, and adsorption/desorption types, while designing material morphology. This addresses volume expansion in alloy‐based materials and instability in transition metal sulfides, resulting in outstanding performance in half‐cells. Utilizing 3D printing, he precisely modulate the electrode structure, maintaining excellent sodium storage even under high loads in full‐cell tests.
The combination of polyoxoniobates (PONbs) with 3d metal ions, azoles, and organoamines is a general synthetic procedure for making unprecedented PONb metal complex cage materials, including discrete ...molecular cages and extended cage frameworks. By this method, the first two PONb metal complex cages K4@{Cu29(OH)7(H2O)2(en)8(trz)21Nb24O67(OH)2(H2O)34} and Cu(en)2@{Cu2(en)2(trz)26(Nb68O188)} have been made. The former exhibits a huge tetrahedral cage with more than 120 metal centers, which is the largest inorganic–organic hybrid PONb known to date. The later shows a large cubic cage, which can act as building blocks for cage‐based extended assembly to form a 3D cage framework {Cu(en)2@{Cu2(trz)2(en)26H10Nb68O188}}. These materials exhibit visible‐light‐driven photocatalytic H2 evolution activity and high vapor adsorption capacity. The results hold promise for developing both novel cage materials and largely unexplored inorganic–organic hybrid PONb chemistry.
Hybrid polyoxoniobate cages: A series of polyoxoniobate (PONb) metal complex cage materials have been made, thus fusing two areas, namely PONbs and MOFs. The cage materials are by far the largest inorganic–organic hybrid PONbs and hold promise for the developments of both novel cage materials and largely unexplored inorganic–organic hybrid PONb chemistry.
Coupling piezoelectric and plasmonic effect to tune the separation and migration of photogenerated charge carriers remains the key to improving the visible-light-driven photoelectrochemical energy ...conversion performance. Herein, we report the rational design of Ag/BiFeO3 fibrous heterostructures (Ag/BFO) with the synergy of piezoelectric field and localized surface plasmon resonance (LSPR) modulation. Piezo-response force microscopy detection shows that the Ag2/BFO (AgNO3 dosage: 2 mL) heterostructure has the optimal piezoelectric properties (29.3 pm at −7.53 V). As a demonstration, the degradation of methyl orange and methylene blue is used to evaluate the photoelectric conversion performance of the prepared samples. The results indicate that the ultrasonic-driven and visible-light-driven Ag2/BFO sample presents significantly enhanced activity, in which the piezoelectric field inside the BFO can further promote the directional migration and separation of photogenerated charge carriers induced by the LSPR effect of Ag nanoparticles. This work offers an intriguing solution toward the rational design of advanced materials targeting direct conversion of solar light into chemical energy.
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•Electrospun BiFeO3 nanofibers exhibited excellent piezoelectric properties.•Ag/BiFeO3 fibrous heterostructures showed advanced piezo-photocatalytic activity.•Synergistic piezoelectric and plasmonic effect enabled efficient photo-induced charge separation.
Mass production of graphene powders affording high quality and environmental benignancy serves as a prerequisite for the practical usage of graphene in multiple energy storage applications. Herein, ...we exploit a salt-templated CVD approach to harness the direct synthesis of nitrogen-doped graphene (NG) nanosheets and related ink dispersions in a scalable, safe, efficient, and green fashion. Thus-fabricated NG accompanying large productivity, excellent electrical conductivity, and favorable solution processability possesses implications in printable energy storage devices. With the NG-based ink in hand, self-standing 3D architectures with programmable patterns can be directly printed over a myriad of substrates. Accordingly, both electrode preparation for flexible supercapacitors and separator modification in Li–S batteries can be enabled via printing by employing our NG-based composite inks. This work thus represents a practical route for mass production of graphene inks with cost-effectiveness and eco-friendliness for emerging energy storage technology.
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•Newly synthesized Cu3N catalyst was employed for electrocatalytic nitrate reduction and ammonia production.•The strategy of balancing *H2O and *NO3 intermediates adsorption for ...enhanced NO3RR was highlighted.•In-situ and ex-situ analysis verify the potential driven reconstruction and rehabilitation of Cu3N.
Nitrate in surface and underground water caused systematic risk to the ecological environment. The electrochemically reduction of nitrate into ammonia (NO3RR), offering a sustainable route for nitrate containing wastewater treatment and ammonia fertilizer conversion. Exploration of catalyst with improved catalytic activity with lower energy barriers is still challenging. Here, we report a copper nitride (Cu3N) catalyst with moderate *NOx and *H2O intermediates adsorptions showed enhanced NO3RR performance. Density functional theory calculations reveals that the unique electronic structure of Cu3N provides efficient active sites for NO3RR, thus enabled balanced adsorption of *NO3 and *H2O (ΔE descriptor), sufficient active hydrogen, and moderate intermediate (*NO3 → HNO3, *NH2→*NH3) adsorption energy. Notably, the in-situ analysis technology revealed potential-driven reconstruction and rehabilitation of Cu3N, forming possible nitrogen vacancy, thus implied for better mechanism understanding. The NO3RR activity of Cu3N surpasses that of most recent catalysts and demonstrates superior stability and implies the application for NH4+ fertilizer recovery, which maintaining an NH3 Faradaic efficiency of 93.1 % and high yield rate of 2.9 mg cm2h−1 at −0.6 V versus RHE. These findings broaden the application scenarios of Cu3N catalyst for ammonia synthesis and provide strategy on improving NO3RR performance.
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•Ag and MnO2 were successfully deposited on the {010} and {110} facets of BiVO4 separately through the two-step photo-deposition.•BiVO4/Ag/MnO2 composites showed advanced ...photocatalytic activity.•The synergistic of plasmonic effect and Z-Scheme heterojunction resulted in effective separation of photo-induced carriers.
Degradation of ciprofloxacin (CIP) and tetracycline (TC) in water through photocatalysis is an attractive route. Utilizing the anisotropy of crystal to construct an interplanar electric field is an effective method to separate the catalyst carrier. Herein, we report a modification strategy based on decahedral bismuth vanadate (BiVO4, BVO) crystal facets regulation. Employing photo-deposition method, Ag and MnO2 nanoparticles were assembled on {010} and {110} crystal facets of BVO, separately. The conversion efficiency of solar energy to chemical energy was evaluated through the CIP and TC degradation experiment (at the initial concentration of 10 mg/L) and it reached a removal efficiency of 93.6% and 93.4% in 100 min using BAM-1.5, respectively, which were 4.23 times and 3.81 times faster than BVO. Mechanism study using free radical trapping experiment and electron paramagnetic resonance (EPR) tested the main active free radicals were ascribed as ·O2- and ·OH. The enhanced catalytic performance can be attributed to the synergistic effect of local surface plasmon resonance and Z-scheme heterojunction of Ag/MnO2 on the BVO. This work provides an intriguing and feasible solution for the preparation of advanced photocatalyst and pave the way for new catalyst finding.
With the rapid development of advanced microelectronic equipment, thermal interface materials with high thermal conductivity and excellent mechanical properties have become an urgent need. Adding ...traditional thermally conductive fillers to polymers often leads to poor mechanical properties of thermal interface materials. In this paper, a liquid metal (LM) is used as an auxiliary filler to fill spherical boron nitride (SBN) polymer thermal interface materials. The liquid metal bridges the spherical boron nitride distributed in "islands", endowing the thermal interface materials with high thermal conductivity (4.00 W m
−1
K
−1
, an increase of 227.66%), and excellent mechanical properties (elongation at break up to 198.96%, an increase of 81.24%). These experimental results show that the liquid metal, a flexible filler, can not only replace rigid fillers to reduce the contact thermal resistance between fillers through surface contact, but also improve the mechanical properties to a certain extent, breaking through the defects of traditional rigid fillers, and provides ideas for the future development of thermal interface materials.
With the rapid development of advanced microelectronic equipment, thermal interface materials with high thermal conductivity and excellent mechanical properties have become an urgent need.
EphA2 is an important oncogenic protein and emerging drug target, but the oncogenic role and mechanism of ligand-independent phosphorylation of EphA2 at tyrosine 772 (pY772-EphA2) is unclear. In this ...study, we established nasopharyngeal carcinoma (NPC) cell lines with stable expression of exogenous EphA2 and EphA2-Y772A (phosphorylation inactivation) using endogenous EphA2-knockdown cells, and observed that pY772A EphA2 was responsible for EphA2-promoting NPC cell proliferation and anchorage-independent and in vivo growth in mice. Mechanistically, EphA2-Y772A mediated EphA2-activating Shp2/Erk-1/2 signaling pathway in the NPC cells, and Gab1 (Grb2-associated binder 1) and Grb2 (growth factor receptor-bound protein 2) were involved in pY772-EphA2 activating this signaling pathway. Our results further showed that Shp2/Erk-1/2 signaling mediated pY772-EphA2-promoting NPC cell proliferation and anchorage-independent growth. Moreover, we observed that EphA2 tyrosine kinase inhibitor ALW-II-41-27 inhibited pY772-EphA2 and EphA2-Y772A decreased the inhibitory effect of ALW-II-41-27 on NPC cell proliferation. Collectively, our results demonstrate that pY772-EphA2 is responsible for EphA2-dependent NPC cell growth in vitro and in vivo by activating Shp2/Erk-1/2 signaling pathway, and is a pharmacologic target of ALW-II-41-27, suggesting that pY772-EphA2 can serve as a therapeutic target in NPC and perhaps in other cancers.
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