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本期封面文章来自德国莱布尼茨催化研究所、德国科学院院士Matthias Beller教授团队综述：Industrially Applied and Relevant Transformations of 1,3-Butadiene using Homogeneous Catalysts。本图以1,3-丁二烯的工业转化为核心，生动展示了通过均相催化将其转化为1-辛烯、1-辛醇、己二腈等功能化学品的过程。其中，均相催化剂充当关键的转化媒介。随着分子转化，其经济价值显著提升，与文章阐述的通过化工过程设计从分子层面提高经济价值的观点相一致。该综述以均相催化剂的发展和应用为切入点，系统性地介绍了目前针对1,3-丁二烯的化工转化所采用的催化过程。通过对反应机理、催化剂进展、产业化应用等方面的综合分析，全面呈现了1,3-丁二烯在橡胶工业之外的主要化工转化途径，提供了全景式的描述。

See  Matthias Beller et al., https://doi.org/10.1039/D3IM00009E

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  01 Review | Page 155-174  

Industrially applied and relevant transformations of 1,3-butadiene using homogeneous catalysts

Highlight: In this review, the use of 1,3-butadiene as a comparably cheap and abundant raw material to harvest fine and bulk chemicals is summarized in detail.

  02 Review | Page 175-187  

Understanding the charging of supercapacitors by electrochemical quartz crystal microbalance

Highlight: Supercapacitors are highly valued energy storage devices and it's crucial to understand their charging mechanism. We present a comprehensive discussion on the applications of EQCM in the supercapacitor community.

  03 Review | Page 188-206  

Catalytic conversion network for lignocellulosic biomass valorization: a panoramic view

Highlight: The catalytic conversion networks for lignocellulose valorization including reaction routes, reaction types and key steps are comprehensively reviewed. The issues that need to be addressed for large-scale application are proposed.

  04 Review | Page 207-223  

Perspective on oligomeric products from lignin depolymerization: their generation, identification, and further valorization

Highlight: A systematic summary on the current state-of-art of the formation, identification, and further valorization of oligomeric products during various lignin depolymerization processes.

Ionic skin: from imitating natural skin to beyond

Highlight: The last decade has witnessed the birth and development of ionic skin. This article systematically reviews the research progress of ionic skin from the perspective of function.

Understanding the interaction mechanism of carbazole/anthracene with N,N-dimethylformamide: NMR study substantiated carbazole separation

Highlight: In this work, the intermolecular interaction of carbazole/anthracene with DMF was investigated using various NMR techniques. More importantly, the intermolecular hydrogen bond between carbazole and DMF in the form of C[double bond, length as m-dash]O⋯H–N was proposed.

  07 Paper | Page 247-253  

Preparation of yolk–shell urchin-like porous Co₃O₄/NiO@C microspheres with excellent lithium storage performance

Highlight: Yolk–shell urchin-like porous Co₃O₄/NiO@C microspheres were synthesized via solvothermal method and annealing treatment. A high reversible capacity of 502.7 mA h g⁻¹ was maintained after 1000 cycles at 5 C, showing the long cycling stability.

  08 Paper | Page 254-261  

Large-scale direct regeneration of LiFePO₄@C based on spray drying

Highlight: We present a scalable, cost-effective closed-loop regeneration process of spent LiFePO₄, including homogenization, spray drying and sintering. The regenerated LiFePO₄ exhibits excellent electrochemical properties.

  09 Paper | Page 262-270  

Theoretical insights into NH₃ absorption mechanisms with imidazolium-based protic ionic liquids

Highlight: NH₃ absorption in [BIm][Tf₂N] is governed by hydrogen bonds between NH₃ and the protic site on the cation and considerable effects of anions due to their interaction with the protic site.