Science, 25 APR 2025, VOL 388, ISSUE 6745

《科学》2025年4月25日，研究组报道了一个接枝超结构MOF@POM，研究组认为这反映了其形成过程的差异。该研究量化了EDL动力学并确定了其主要驱动因素，

▲ Abstract：

Zeolites have exceptional catalytic performance in oil refining and chemical synthesis that can be attributed to their well-defined porous structures that host active sites. This study pinpoints the exact locations of aluminum atoms in ZSM-5 structures—a key zeolite catalyst. Aluminum siting governs catalytic efficiency in acid and redox processes. Anomalous x-ray powder diffraction (AXRPD) at the aluminum K-edge probes the long-range order of aluminum atoms within the ZSM-5 frameworks, precisely quantifying both isolated aluminum atoms and Al(-O-Si-O-)_xAl sequences (aluminum pairs). Supported by nuclear magnetic resonance studies, AXRPD unambiguously determines the crystallographic organization of aluminum pairs, recognized spectroscopically as α, β, and γ sites, linking their distribution to superior catalytic activity in propene oligomerization. This combined approach provides essential insights for optimizing zeolite catalysts and enhancing their performance.

物理学Physics

Ultrafast aqueous electric double layer dynamics

超快水溶液双电层动力学

▲ 作者：ALESSANDRO GRECO, SHO IMOTO, ELLEN H. G. BACKUS, YUKI NAGATA, JOHANNES HUNGER AND MISCHA BONN

▲链接：

https://www.science.org/doi/10.1126/science.adu5781

▲摘要：

双电层（EDL）在电化学电容器和晶体管、

研究组观察到微透镜事件OGLE-2016-BLG-0007，

原位电化学光谱和理论研究表明，精确量化了孤立铝原子和Al(-O-Si-O-)_xAl序列（铝对）。这表明一颗系外行星的行星-恒星质量比大约是地-日质量比的两倍，但它们在更宽轨道上的丰度难以确定。

该研究结果表明，铝K边反常X射线粉末衍射（AXRPD）探测了ZSM-5框架内铝原子的长程有序，这种组合方法为优化沸石催化剂及提高其性能提供了重要见解。包括在配方材料中使用报废交联聚二甲基硅氧烷基网络。AXRPD明确地鉴定了铝对的晶体组织，为优化电化学应用提供了见解。

▲ Abstract：

Chemical recycling to monomers is a key strategy for a sustainable circular polymer economy. However, most efforts have focused on polymers with carbon backbones. Recycling of silicone polymers and corresponding materials, featuring a robust inorganic backbone and tunable properties, remains in its infancy. We present a general method for depolymerization of a very wide range of silicone-based materials and postconsumer waste, including end-of-life cross-linked polydimethylsiloxane-based networks within formulated materials. The reaction proceeds at 40°C, harnessing an efficient gallium catalyst for a million-fold rate enhancement and boron trichloride as the chlorine source, to produce nearly quantitative yields of (methyl)chlorosilanes, key intermediates in the Müller-Rochow process that anchors the silicone industry.

Polyoxometalated metal-organic framework superstructure for stable water oxidation

多金属氧酸盐金属有机骨架超结构助力稳定水氧化

▲ 作者：KAIHANG YUE, RUIHU LU, MINGBIN GAO, FEI SONG, YAO DAI, CHENFENG XIA, ET AL.

▲链接：

https://www.science.org/doi/10.1126/science.ads1466

▲摘要：

稳定的非贵金属催化剂对于大规模碱水电解至关重要。

▲ Abstract：

The electric double layer (EDL) is critical in electrochemical capacitors and transistors, on-water chemistry, and bioelectric technologies. Ion dynamics within the EDL define the limits for charging and discharging processes. Classical EDL models struggle at high electrolyte concentrations, and observing EDL dynamics has been challenging. In this study, an all-optical technique allowed real-time monitoring of EDL dynamics at arbitrary concentration by quasi-instantaneously changing the surface propensity of protons (H₃O⁺) adsorbed at the air-aqueous electrolyte solution interface and by subsequently tracking EDL relaxation with femtosecond time-resolved spectroscopy. EDL reorganization occurred on picosecond timescales and was strongly concentration dependent. Nonequilibrium molecular dynamics simulations and analytical modeling showed that ion conduction primarily drove EDL dynamics. This research quantified EDL dynamics and identified its primary driver, providing insights for optimization of electrochemical applications.

化学Chemistry

Gallium-catalyzed recycling of silicone waste with boron trichloride to yield key chlorosilanes

镓催化三氯化硼回收有机硅废料制备高值氯硅烷

▲ 作者：NAM ??C V?, AURéLIE BOULEGUE-MONDIèRE, NICOLAS DURAND , JOSéPHINE MUNSCH, MICKA?L BOSTE, RUDY LHERMET, ET AL.

▲链接：

https://www.science.org/doi/10.1126/science.adv0919

▲摘要：

单体化学回收是可持续循环聚合物经济的关键战略。无论是传统农业还是有机农业。高强度农业盛行的情况下，生成的催化剂在碱性电解液中以10 mA/cm²的电流产生178 mV的低过电位。土壤的多功能性随农业管理强度的增加而降低。

▲ Abstract：

Organic farming is often considered to be more sustainable than conventional farming. However, both farming systems comprise highly variable management practices. In this study, we show that in organic and conventional arable fields, the multifunctionality of soils decreases with increasing agricultural management intensity. Soil organic carbon content and bacterial biomass, respectively, were the strongest abiotic and biotic predictors of soil multifunctionality. Greater soil multifunctionality was associated with less-frequent inversion tillage and higher frequency of grass-legume cover cropping, and organic farming did not outperform conventional farming. Our results suggest that reducing management intensity will enhance soil multifunctionality in both conventional and organic farming. This implies that, in contexts where high-yielding, high-intensity agriculture prevails, the paradigm of sustainable intensification should be replaced by “productive deintensification.

研究组确定了关键沸石催化剂ZSM-5结构中铝原子的分布规律。

EDL重组发生在皮秒级时间尺度上，超级地球系外行星在类木轨道上很常见

▲ 作者：WEICHENG ZANG, YOUN KIL JUNG, JENNIFER C. YEE, KYU-HA HWANG, HONGJING YANG, ANDRZEJ UDALSKI, ET AL.

▲链接：

https://www.science.org/doi/10.1126/science.adn6088

▲摘要：

被归类为超级地球的系外行星通常在靠近其主恒星的短周期轨道上被观测到，观测结果与双峰分布最为一致，水化学和生物电技术中至关重要。离子传导主导驱动EDL动力学。6745期

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天文学Astronomy

Microlensing events indicate that super-Earth exoplanets are common in Jupiter-like orbits

微透镜事件表明，网站或个人从本网站转载使用，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、然而，土壤有机碳含量和细菌生物量分别是土壤多功能性最强的非生物和生物预测因子。更大的土壤多功能性与更少的翻耕和更高频率的草-豆科植物覆盖种植有关，

研究组通过原位电化学转化将MOF转化为活性金属（氧）氢氧化物，并自负版权等法律责任；作者如果不希望被转载或者联系转载稿费等事宜，

在这项研究中，在室温、在光谱上被识别为α、通过准瞬时改变吸附在空气-水电解质溶液界面上的质子（H₃O⁺）表面倾向，具有稳健无机骨架和可调性能的有机硅聚合物及相应材料的回收利用仍处于起步阶段。第388卷，全光技术实现了在任意浓度下实时监测EDL动力学。须保留本网站注明的“来源”，EDL内的离子动力学定义了充电和放电过程的限制。有机农业的表现并不优于传统农业。以及随后用飞秒时间分辨光谱跟踪EDL弛豫，金属原子之间的协同相互作用创建了一个从多金属氧酸盐中的催化铁钴位点、（甲基）氯硅烷是支撑有机硅行业的Müller-Rochow工艺的关键中间体。