Zhou, Huang; Liu, Tianyang; Zhao, Xuyan; Zhao, Yafei; Lv, Hongwei; Fang, Shi; Wang, Xiaoqian; Zhou, Fangyao; Xu, Qian; Xu, Jie; Xiong, Can; Xue, Zhenggang; Wang, Kai; Cheong, Weng‐Chon; Xi, Wei; Gu, Lin; Yao, Tao; Wei, Shiqiang; Hong, Xun; Luo, Jun; Li, Yafei; Wu, Yuen
doi: 10.1002/anie.201985161pmid: N/A
Hayashi, Takahiro; Ligibel, Mathieu; Sager, Emine; Voss, Moritz; Hunziker, Jürg; Schroer, Kirsten; Snajdrova, Radka; Buller, Rebecca
doi: 10.1002/anie.201914496pmid: N/A
Sun, Qiming; Wang, Ning; Zhang, Tianjun; Bai, Risheng; Mayoral, Alvaro; Zhang, Peng; Zhang, Qinghong; Terasaki, Osamu; Yu, Jihong
doi: 10.1002/anie.201914720pmid: N/A
Wang, Yun‐Xiao; Lai, Wei‐Hong; Wang, Yun‐Xia; Chou, Shu‐Lei; Ai, Xinping; Yang, Hanxi; Cao, Yuliang
doi: 10.1002/anie.201902552pmid: 31087486
Emerging rechargeable sodium‐ion storage systems—sodium‐ion and room‐temperature sodium–sulfur (RT‐NaS) batteries—are gaining extensive research interest as low‐cost options for large‐scale energy‐storage applications. Owing to their abundance, easy accessibility, and unique physical and chemical properties, sulfur‐based materials, in particular metal sulfides (MSx) and elemental sulfur (S), are currently regarded as promising electrode candidates for Na‐storage technologies with high capacity and excellent redox reversibility based on multielectron conversion reactions. Here, we present current understanding of Na‐storage mechanisms of the S‐based electrode materials. Recent progress and strategies for improving electronic conductivity and tolerating volume variations of the MSx anodes in Na‐ion batteries are reviewed. In addition, current advances on S cathodes in RT‐NaS batteries are presented. We outline a novel emerging concept of integrating MSx electrocatalysts into conventional carbonaceous matrices as effective polarized S hosts in RT‐NaS batteries as well. This comprehensive progress report could provide guidance for research toward the development of S‐based materials for the future Na‐storage techniques.
Makarova, Mariia; Rycek, Lukas; Hajicek, Josef; Baidilov, Daler; Hudlicky, Tomas
doi: 10.1002/anie.201901564pmid: 30856678
This review provides a comprehensive coverage of the history, biology and chemistry of tetrodotoxin (TTX). It traces the origin of this remarkable molecule all the way back to the ancient Chinese medicine records. The discovery of biological activity, isolation, and a brief overview of structure elucidation are summarized. Next, the biology of TTX is discussed, primarily in the context of its activity in the sodium channels, its anesthetic properties, and its potential use in cancer treatment or drug addiction. Biosynthesis of TTX is covered before the discussion of the total syntheses. All total, formal or partial syntheses are covered but those total syntheses that have been discussed in previous reviews are only briefly summarized. Finally, the synthesis of natural and unnatural derivatives is surveyed, and a conclusion and outlook are provided for this very extensive field of endeavor. To the best of our knowledge the literature coverage is complete up to December 2018.
Zhou, Huang; Liu, Tianyang; Zhao, Xuyan; Zhao, Yafei; Lv, Hongwei; Fang, Shi; Wang, Xiaoqian; Zhou, Fangyao; Xu, Qian; Xu, Jie; Xiong, Can; Xue, Zhenggang; Wang, Kai; Cheong, Weng‐Chon; Xi, Wei; Gu, Lin; Yao, Tao;
Zhang, Xiao‐Ping; Li, Yan‐Ni; Sun, Yi‐Yang; Zhang, Tao
doi: 10.1002/anie.201910427pmid: 31628706
An exceptionally strong solvation effect of dimethyl sulfoxide (DMSO) on I2 is identified by the largest shift observed so far of the I2 Raman peak with respect to I2 vapor and by elongated I−I bond lengths in first‐principles molecular‐dynamics simulations. This effect together with strong binding by an RuO2 surface to I2 is found to invert the direction of the reaction I−+I2⇌I3− to the left‐hand side. Inspired by this finding, we prepared a Li–O2 battery with the Li/DMSO+LiI/RuO2 structure. The synergic action of DMSO and RuO2 on I2 is found to suppress the shuttle effect of the redox mediator (RM) by anchoring I2 molecules, the oxidation product of the RM. Significantly enhanced stability is demonstrated over 100 cycles at charging voltage below 3.65 V.
Showing 1 to 10 of 65 Articles
doi: 10.1002/anie.201912785pmid: 31692199
A surface digging effect of supported Ni NPs on an amorphous N‐doped carbon is described, during which the surface‐loaded Ni NPs would etch and sink into the underneath carbon support to prevent sintering. This process is driven by the strong coordination interaction between the surface Ni atoms and N‐rich defects. In the aim of activation of C−H bonds for methane oxidation, those sinking Ni NPs could be further transformed into thermodynamically stable and active metal‐defect sites within the as‐generated surface holes by simply elevating the temperature. In situ transmission electron microscopy images reveal the sunk Ni NPs dig themselves adaptive surface holes, which would largely prevent the migration of Ni NPs without weakening their accessibility. The reported two‐step strategy opens up a new route to manufacture sintering‐resistant supported metal catalysts without degrading their catalytic efficiency.