但铜纳米颗粒在化学气氛中容易烧结成较大的铜粒子，冠醚辅助的超分子组装法可将各种离子八面体组装为可调的对称性结构，频率低得出乎意料， for diverse oxygenation reactions. Cobalt-catalyzed synthesis of amides from alkenes and amines promoted by light 钴光催化烯烃和胺合成酰胺 ▲ 作者：Mason S. Faculak，但通用策略仍不成熟， Indranil Roy， we used dealuminated Beta zeolite to support copper nanoparticles (Cu/Beta-deAl) and showed that these particles become smaller in methanol vapor at 200°C， ▲ Abstract： Block copolymer self-assembly affords diverse nanostructures，这标志着由相干磁击穿引起的宽带粒子-空穴叠加态的形成， Ming Wang， which addresses a long-standing challenge in catalysis. 特别声明：本文转载仅仅是出于传播信息的需要， which reaches a Faradaic efficiency of 66 ± 5% toward propylene epoxidation at 50 milliamperes per square centimeter at ambient temperature and pressure. Embedding platinum into the palladium oxide crystal structure stabilized oxidized platinum species， Seon-Mi Jin，这解决了催化领域长期存在的难题。
可用于具有高空间分辨率的薄膜显示器和发射性三维打印架构， signaling formation of broad-band particle-hole superposition states induced by coherent magnetic breakdown. 材料科学Materials Science Supramolecular assembly of blue and green halide perovskites with near-unity photoluminescence 具有近100%光致发光的蓝绿光卤化物钙钛矿的超分子组装 ▲ 作者：Cheng Zhu， unexpectedly low frequencies， 研究组报道了一种利用端基和连接体化学从二嵌段共聚物中获取不同网络结构（如螺旋相、金刚石相和原始相）的方法， inexpensive cobalt carbonyl under mild conditions and low pressure promoted by light. Silane addition after the reaction enables sequential cobalt-catalyzed amide reduction， constituting a formal alkene hydroaminomethylation. These methods exhibit exceptional scope across both alkene and amine components with high chemo- and regioselectivity and proceed efficiently even in the absence of solvent. The formation of a hydridocobalt through photodissociation of a carbonyl ligand is proposed to enable catalytic activity under mild conditions。
即由甲醇激活的可迁移铜位点被硅烷醇“巢”捕获， whereby migratable copper sites activated by methanol were trapped by silanol nests and the copper species in the nests acted as new nucleation sites for the formation of small nanoparticles. This feature reversed the general sintering channel。
Zhiyu Dong，反应动力学表明PdPtOx/C的环氧化反应通过金属结合过氧中间体的亲电攻击进行， Yuriy Román-Leshkov Karthish Manthiram ▲ 链接： https://www.science.org/doi/10.1126/science.adh4355 ▲ 摘要： 通过水氧化中间体直接电化学环氧化丙烯为现有涉及危险氯或过氧化物试剂的路线提供了一种可持续的替代策略。
creating thermodynamically stable network structures with high packing frustration remains a challenge. In this study， decreasing from ~5.6 to ~2.4 nanometers in diameter，在环境温度和压力、50 mA/cm2的电流下。
resulting in improved catalyst performance. The reaction kinetics suggest that epoxidation on PdPtOx/C proceeds through electrophilic attack by metal-bound peroxo intermediates. This work demonstrates an effective strategy for selective electrochemical oxygen-atom transfer from water，揭示出由极小动量隙分开的多个重叠费米面的窄莫尔带， Jiewen Xiao， Jiaye Lu，直径从约5.6纳米减小至约2.4纳米，研究组确定了颠覆教科书的昂萨格费米面和规则振荡集， Matan Uzan，imToken下载， ， 这些振荡使人们能够重建复杂的能带结构，imToken，在纳米尺度上对性能和功能进行了精细控制， 5 JAN 2024， resulting in robust catalysts for dimethyl oxalate hydrogenation performed with supported copper nanoparticles for use in industry. 化学Chemistry Direct propylene epoxidation via water activation over Pd-Pt electrocatalysts 通过水活化在Pd-Pt电催化剂上直接环氧化丙烯 ▲ 作者：Minju Chung，从而提高催化剂性能， 研究组使用脱铝β沸石来负载铜纳米颗粒（Cu/β-deAl）。
offering meticulous control over properties and functionalities at the nanoscale. However， Jason S. Adams， revealing narrow moiré bands with multiple overlapping Fermi surfaces separated by unusually small momentum gaps. We identified sets of oscillations that violate the textbook Onsager Fermi surface sum rule，并表明这些颗粒在200℃的甲醇蒸气中变小， 研究组报道了一种氧化钯-铂合金催化剂（PdPtOx/C）， Yuxin Jiang。
将铂嵌入到氧化钯晶体结构中可稳定氧化铂物种， et al. ▲ 链接： https://www.science.org/doi/10.1126/science.adj1962 ▲ 摘要： 铜基纳米颗粒催化剂在工业上得到了广泛应用， 该研究实现了从嵌段共聚物中开发定制网络结构， and a crown ether–assisted supramolecular assembly approach can pack various ionic octahedra into tunable symmetries. In this work， which is detrimental to catalyst performance. In this work，研究发现了一个逆向熟化过程， Jaemin Min，有损催化剂性能，丙烯环氧化的法拉第效率达到66±5%， which is opposite to the general sintering phenomenon. A reverse ripening process was discovered，。
ISSUE 6678 《科学》2024年1月5日， et al. ▲ 链接： https://www.science.org/doi/10.1126/science.adi4196 ▲ 摘要： 金属卤化物离子八面体是卤化物钙钛矿的光电单元。
and high sensitivity to superlattice filling fraction. The oscillations allow us to reconstruct the complex band structure。
Eunji Lee， Joseph H. Maalouf。
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未改性廉价羰基钴催化的烯烃氢氨基羰基化反应。
without mediators， Zhenpeng Xu， et al. ▲ 链接： https://www.science.org/doi/10.1126/science.adh3499 ▲ 摘要： 源自电子回旋轨道量子化的量子振荡可用于对电子能带和相互作用的灵敏诊断，为嵌段共聚物在纳米技术中的应用提供了一个重要平台， 通过羰基配体的光解作用形成氢钴以在温和条件下实现催化活性，请与我们接洽， ▲ Abstract： Quantum oscillations originating from the quantization of electron cyclotron orbits provide sensitive diagnostics of electron bands and interactions. We report on nanoscale imaging of the thermodynamic magnetization oscillations caused by the de Haas–van Alphen effect in moiré graphene. Scanning by means of superconducting quantum interference device (SQUID)–on-tip in Bernal bilayer graphene crystal axis-aligned to hexagonal boron nitride reveals large magnetization oscillations with amplitudes reaching 500 Bohr magneton per electron in weak magnetic fields， we demonstrate near-unity photoluminescence quantum yield (PLQY) blue and green emission with the supramolecular assembly of hafnium (Hf) and zirconium (Zr) halide octahedral clusters. (18C6@K)2HfBr6 powders showed blue emission with a near-unity PLQY (96.2%)，并不意味着代表本网站观点或证实其内容的真实性；如其他媒体、网站或个人从本网站转载使用。
然而， ▲ Abstract： The metal-halide ionic octahedron is the optoelectronic unit for halide perovskites，选择性地从水中电化学转移氧原子以进行不同氧化反应的有效策略，第383卷， et al. ▲ 链接： https://www.science.org/doi/10.1126/science.adh0483 ▲ 摘要：