Science Bulletin最新文献_第10页

Tailored Fe catalyst microenvironment for highly efficient syngas conversion to olefins with low CO₂ emissions. 量身定制的铁催化剂微环境，高效合成气转化为烯烃，二氧化碳排放量低。

IF 21.1 1区综合性期刊

Science Bulletin Pub Date : 2025-07-23 DOI: 10.1016/j.scib.2025.07.032

Di Xu, Yajie Cao, Haifeng Fan, Guoqiang Hou, Yangyang Li, Siyi Huang, Ruosong He, Hanzhu Zhang, Riguang Zhang, Mingyue Ding

{"title":"Tailored Fe catalyst microenvironment for highly efficient syngas conversion to olefins with low CO<sub>2</sub> emissions.","authors":"Di Xu, Yajie Cao, Haifeng Fan, Guoqiang Hou, Yangyang Li, Siyi Huang, Ruosong He, Hanzhu Zhang, Riguang Zhang, Mingyue Ding","doi":"10.1016/j.scib.2025.07.032","DOIUrl":"10.1016/j.scib.2025.07.032","url":null,"abstract":"<p><p>Achieving highly efficient syngas conversion to olefins on the Fe-based catalysts is promising, but remains a big challenge due to the twin coexistence of the Fischer-Tropsch to olefins (FTO) and water gas shift (WGS) reactions. Herein, we developed a strategy via regulating the microenvironment of Fe catalyst and controlling the diffusion behaviors of critical intermediates to successfully realize the syngas conversion to olefins with low CO<sub>2</sub> emission. A Fe@C catalyst with Fe species encapsulated in porous carbon was fabricated and achieved high single-pass olefins yield (>30%) and low CO<sub>2</sub> selectivity (around 20%) simultaneously, which has ranked the top among the ever-reported advanced oxide-zeolite, Co-based, and Fe-based catalysts. A series of experimental and theoretical results revealed that the unique microenvironment could enrich olefins and inhibit hydrogenation reaction, therefore favoring high value-added olefins formation. Moreover, due to the accelerated diffusion of H<sub>2</sub>O molecules, the WGS side reaction was obviously inhibited even at high CO conversion. Our research presented a new catalyst design strategy to realize highly efficient and controllable catalysis in syngas conversion.</p>","PeriodicalId":421,"journal":{"name":"Science Bulletin","volume":" ","pages":""},"PeriodicalIF":21.1,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144881751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Alternative stable states in ecology and their representation 生态学中可选择的稳定状态及其表征。

IF 21.1 1区综合性期刊

Science Bulletin Pub Date : 2025-07-21 DOI: 10.1016/j.scib.2025.07.029

James D. Bever

引用次数: 0

Interfacial polymer: plastic’s solar hydrogen makeover 界面聚合物：塑料的太阳能氢改造。

IF 21.1 1区综合性期刊

Science Bulletin Pub Date : 2025-07-18 DOI: 10.1016/j.scib.2025.07.028

Yiqing Wang, Shaohua Shen

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Electrochemical treatment of organochlorine compounds in water: a catalysis perspective 水中有机氯化合物的电化学处理：催化的视角。

IF 21.1 1区综合性期刊

Science Bulletin Pub Date : 2025-07-18 DOI: 10.1016/j.scib.2025.07.027

Xin Xu , Seonjeong Cheon , Yuanzuo Gao , Hailiang Wang

引用次数: 0

RNA immunity: an ancient defense mechanism preserved in mammalian cells. RNA免疫：保存在哺乳动物细胞中的一种古老的防御机制。

IF 21.1 1区综合性期刊

Science Bulletin Pub Date : 2025-07-17 DOI: 10.1016/j.scib.2025.07.024

Zheng Fu, Liang Li, Yanbo Wang, Xin Yin, Xi Chen, Chao Yan, Dangsheng Li, Chen-Yu Zhang

引用次数: 0

New evidence for Palaeozoic mineralization in the world-class Bayan Obo rare earth deposit 世界级白云鄂博稀土矿床古生代成矿作用新证据。

IF 21.1 1区综合性期刊

Science Bulletin Pub Date : 2025-07-17 DOI: 10.1016/j.scib.2025.07.008

Weidong Sun , Mingxing Ling

引用次数: 0

Divergent aryne regulation for polycyclic aromatic hydrocarbons 多环芳烃的发散性调控。

IF 21.1 1区综合性期刊

Science Bulletin Pub Date : 2025-07-17 DOI: 10.1016/j.scib.2025.07.026

Kai Liu , Leiyang Bai , Shuang Deng , Xiaotian Qi , Xuefeng Jiang

{"title":"Divergent aryne regulation for polycyclic aromatic hydrocarbons","authors":"Kai Liu , Leiyang Bai , Shuang Deng , Xiaotian Qi , Xuefeng Jiang","doi":"10.1016/j.scib.2025.07.026","DOIUrl":"10.1016/j.scib.2025.07.026","url":null,"abstract":"<div><div>Arynes are straightforward and effective synthons for <em>π</em>-extension accompanying by vicinal difunctionalization simultaneously, thereby being ideal building blocks for polycyclic aromatic hydrocarbons (PAHs) construction. However, C<img>C triple bond in an aromatic system, with the distorted bond angle and shortened bond distance, arouses tremendous challenges for thermodynamic stability and kinetically reactive selectivity, especially for heteroarynes. Herein, controllable aryne generation was achieved for nitrogen-doped polycyclic aromatic hydrocarbons via designed cyclic pyridine–benzene <em>λ</em><sup>3</sup>-iodanes, in which the iodine ensured the thermodynamic stability and kinetic site-selectivity via <em>p</em>→<em>π</em>* interaction with aryne for chemo- and regio-selectivity. The “pyridyne–benzyne” model enabled the preeminent <em>ortho</em>-selectivity with nucleophilic capture and consecutive [4+2]-cycloaddition for <em>π</em> conjugation extension, not only assembling for <em>N</em>-doped PAHs with adjustable Twisted Intramolecular Charge Transfer (TICT) and inverse Suppression of Proximity Effect (SOPE) phenomenon but also establishing a reliable empirical formula for regulating generation and release of arynes.</div></div>","PeriodicalId":421,"journal":{"name":"Science Bulletin","volume":"70 18","pages":"Pages 2967-2976"},"PeriodicalIF":21.1,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144758789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Transcriptional control of male-specific pathway in temperature-dependent sex determination. 温度依赖性性别决定中雄性特异性途径的转录控制。

IF 21.1 1区综合性期刊

Science Bulletin Pub Date : 2025-07-17 DOI: 10.1016/j.scib.2025.07.025

Yin-Zi Ye, Jiameng Li, Weiming Li, Xiaonan Fu, Jiajun Zhang, Shilong Yang, Wei-Guo Du

引用次数: 0

Epi-transcriptome analysis reveals the lack of N⁶-methyladenosine modifications in two RNA viruses infecting watermelon. 表观转录组分析显示，两种侵染西瓜的RNA病毒缺乏n6 -甲基腺苷修饰。

IF 21.1 1区综合性期刊

Science Bulletin Pub Date : 2025-07-16 DOI: 10.1016/j.scib.2025.07.019

Fuan Pan, Jiaxian Jing, Yanhong Qiu, Maoying Li, Xueping Zhou, Shaofang Li

引用次数: 0

Magic cube metamaterials 魔方超材料。

IF 21.1 1区综合性期刊

Science Bulletin Pub Date : 2025-07-16 DOI: 10.1016/j.scib.2025.07.010

Zuntian Chu , Xinqi Cai , Ruichao Zhu , Tonghao Liu , Huiting Sun , Fan Wu , Tiefu Li , Yuxiang Jia , Yajuan Han , Shaobo Qu , Tiejun Cui , Jiafu Wang

{"title":"Magic cube metamaterials","authors":"Zuntian Chu , Xinqi Cai , Ruichao Zhu , Tonghao Liu , Huiting Sun , Fan Wu , Tiefu Li , Yuxiang Jia , Yajuan Han , Shaobo Qu , Tiejun Cui , Jiafu Wang","doi":"10.1016/j.scib.2025.07.010","DOIUrl":"10.1016/j.scib.2025.07.010","url":null,"abstract":"<div><div>Traditionally, magic cube configurations, which have been employed to mechanically execute diverse and unconventional structural transformations, are capable of significantly boosting versatile electromagnetic responses of reconfigurable metamaterials. However, this idea is still in the initial exploration stage and faces many constraints. Here, we propose magic cube metamaterials with features of high transparency, multi-gradient phase distribution, full polarization, and high information, which manifest 47.58% optical transmittance, a 6-order phase distribution, a 77% fractional operating bandwidth, and 65.23 times information entropy of their planar counterparts. The reflection phase corresponding to coplanar lattice of the metamaterials can be dynamically and omni-directionally controlled via altering their spatial distributions through individually addressing each rotatable meta-particle while maintaining the polarization states. The optically transparent design allows for real-time visual interaction and sequence mapping of the reconfigurable metamaterials. As two proof-of-concept meta-devices, an achromatic metalens with an unchanged focal length and a switchable multi-functional beam generator is demonstrated by simulations and experiments in an ultra-wide band (8.0–18.0 GHz). This work provides an effective alternative for designing reconfigurable metamaterials with high information-entropy properties, paving a new route toward advanced equipment such as active signal processors and information encryption/decryption systems.</div></div>","PeriodicalId":421,"journal":{"name":"Science Bulletin","volume":"70 17","pages":"Pages 2771-2783"},"PeriodicalIF":21.1,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144717215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0