IF 6.6 2区化学

ChemSusChem Pub Date : 2025-10-01 DOI: 10.1002/cssc.70166

Ioannis Papaioannou, Athanasios Arampatzis, Ioanna Tzortzi, Xin Gao, Tom Van Gerven, Georgios D. Stefanidis

引用次数: 0

Cover Feature: Polarity-Enhanced Covalent Organic Frameworks for Sacrificial-Agent-Free Synthesis of Hydrogen Peroxide under Visible Light Catalysis (ChemSusChem 19/2025) 封面专题：可见光催化下无牺牲剂合成过氧化氢的极性增强共价有机框架（ChemSusChem 19/2025）

IF 6.6 2区化学

ChemSusChem Pub Date : 2025-10-01 DOI: 10.1002/cssc.70168

Fei Xue, Jun Zhang, Zhongcheng Ma, Zhonggang Wang

引用次数: 0

Cover Feature: Durable Heterogeneous Pd-PNP Pincer Complex for CarbonCarbon Bond Formation in Continuous-Flow Systems (ChemSusChem 19/2025) 覆盖特性：耐用的非均相Pd-PNP螯合物，用于碳的形成在连续流系统（ChemSusChem 19/2025）

IF 6.6 2区化学

ChemSusChem Pub Date : 2025-10-01 DOI: 10.1002/cssc.70167

Naoya Sakurada, Kanon Kawai, Yuka Abe, Kwihwan Kobayashi, Shinya Mine, Noriko Miyamoto, Tsuyoshi Yamada, Takashi Ikawa, Hironao Sajiki

引用次数: 0

(Re)visiting the Sustainability Thresholds: Are Product Titers of 1 g L^-1 Enough for (Bio)chemical Processes? （再）访问可持续性阈值：1 g L-1的产品滴度是否足以用于（生物）化学过程？

IF 6.6 2区化学

ChemSusChem Pub Date : 2025-10-01 DOI: 10.1002/cssc.202501831

Pablo Domínguez de María

{"title":"(Re)visiting the Sustainability Thresholds: Are Product Titers of 1 g L-1 Enough for (Bio)chemical Processes?","authors":"Pablo Domínguez de María","doi":"10.1002/cssc.202501831","DOIUrl":"https://doi.org/10.1002/cssc.202501831","url":null,"abstract":"In a previous work, equations were reported to estimate global warming potential (GWP, kg CO2 kg product-1) of (bio)catalytic reactions, using substrate loadings and conversions. The approach is useful for reactions with similar mass-to-mass proportion (substrate to product). For processes with mass-to-mass change, or for fermentations, where the relationship substrate to product is elusive, GWP equations using product titers are more straightforward. This article introduces such product-titers-based GWP equations estimating the CO2 released from energy (up- and downstream), as well as from the waste treatment, namely wastewater and solvents. Equations are applied to discuss whether aqueous (bio)transformations with product titers of 1 g L-1 and extractive downstream are sustainable. When effluents are not recycled, >6000 kg CO2 kg product-1 is generated, because large aqueous media (1000 L) and solvents (1000-3000 L) are needed for one product kilogram. Even when solvent and water effluents are almost completely recycled (95%), >100 kg CO2 kg product-1 is still generated. For better environmental figures, process intensification with less diluted systems is mandatory. Setting product titers of ≈20 g L-1 with large recycling loops (95%) and mild wastewater treatment decrease the overall GWP to ≈10 kg CO2 kg product-1. GWP estimations at early development are useful in improving processes with low TRLs.","PeriodicalId":149,"journal":{"name":"ChemSusChem","volume":" ","pages":"e202501831"},"PeriodicalIF":6.6,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145204991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CO₂ Reduction to Formic Acid/Formate by Intermittent Electricity at Bismuth Gas Diffusion Electrodes. 铋气扩散电极间歇电法将CO2还原为甲酸/甲酸。

IF 6.6 2区化学

ChemSusChem Pub Date : 2025-09-30 DOI: 10.1002/cssc.202501583

Ida Dinges, Siegfried R Waldvogel, Markus Stöckl

{"title":"CO2 Reduction to Formic Acid/Formate by Intermittent Electricity at Bismuth Gas Diffusion Electrodes.","authors":"Ida Dinges, Siegfried R Waldvogel, Markus Stöckl","doi":"10.1002/cssc.202501583","DOIUrl":"https://doi.org/10.1002/cssc.202501583","url":null,"abstract":"To avoid the waste of renewable energy resources beyond demand and grid capacity, innovative gas diffusion electrodes (GDE) for operation at intermittent electricity are presented. They are based on Bi as affordable and nontoxic electrocatalyst, to facilitate decentralized and cost-efficient reduction of CO2 to formic acid. To develop flexible GDE materials, their catalyst composition is optimized by studying systematically inexpensive Bi/Bi2O3 mixtures. During initial evaluation at technically relevant current density (150 mA cm-2, 21 h), the best composition achieve high Faradaic efficiency (FE) (≈90%) and the loss of catalyst is minor. In three demonstrative examples of realistic current patterns based on intermittent electricity, the performance and resilience of the optimized GDE is consistently very good in terms of high FE (≈90%) and stable synthesis rates of formate. However, loss of catalyst is partially increased, especially when GDEs are depolarized between electrolysis phases. Nonetheless, the GDE materials already show robust performances despite swift adjustments of current density (60 s) without any optimization of operational parameters so far. Based on these results, flexible operation of these GDE can be optimized to minimize cathodic corrosion of catalyst at long-term operation, and thus, ultimately evaluate their implementation to valorize intermittent electricity.","PeriodicalId":149,"journal":{"name":"ChemSusChem","volume":" ","pages":"e202501583"},"PeriodicalIF":6.6,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145190559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficient CO₂ Hydrogenation to Formate with a Continuous-Flow System under Mild Conditions Catalyzed by Ir-Based Porous Organic Polymer. ir基多孔有机聚合物催化下连续流系统中CO2加氢制甲酸的研究。

IF 6.6 2区化学

ChemSusChem Pub Date : 2025-09-30 DOI: 10.1002/cssc.202501614

Xinrong Wang, Wentao Ma, Peng Zheng, Boyu Zhu, Li Luo, Yuxin Jia, Chenfei Yao, Jiao Geng, Xingbang Hu

引用次数: 0

Rigid-Flexible Thiophene-Based Block Copolymer/Multiwalled Carbon Nanotube for Enhancing Anode Performance by Extended π-Conjugation. 刚性-柔性噻吩基嵌段共聚物/多壁碳纳米管扩展π共轭增强阳极性能。

IF 6.6 2区化学

ChemSusChem Pub Date : 2025-09-30 DOI: 10.1002/cssc.202501609

Xin Zeng, Haiying Nie, Jian Li

{"title":"Rigid-Flexible Thiophene-Based Block Copolymer/Multiwalled Carbon Nanotube for Enhancing Anode Performance by Extended π-Conjugation.","authors":"Xin Zeng, Haiying Nie, Jian Li","doi":"10.1002/cssc.202501609","DOIUrl":"https://doi.org/10.1002/cssc.202501609","url":null,"abstract":"Polythiophene emerges as a promising anode with a high theoretical capacity, rapid redox kinetics, and low storage voltage. However, two challenges persist: rapid capacity degradation because of low conductivity and hindered ion intercalation pathways due to entanglements of polymer. This work presents a novel copolymer design of thiophene/butylthiophene (TH/BT) blocks integrated with multiwalled carbon nanotubes (MWCNTs). The rigid TH blocks enhance molecular crystallinity to expose electrochemically active thiophene rings, while the flexible BT segments promote the growth of copolymers around MWCNTs to establish an efficient 3D electron transport network. Through optimizing TH:BT ratio to 3:1, the balance between crystallinity and solubility is achieved and yields a block copolymer composite, designated as Cob(3:1)-TH+BT@CNT. Consequently, the anode shows superior performances: 1) enhances reversible capacity of 920 mAh g- 1 at 100 mA g- 1 (only 300 mAh g-1 for unmodified polythiophene@CNT); 2) maintains 105.0% and 100.6% capacity after 500 cycles at 1 and 2 A g- 1, respectively; and 3) preserves storage characteristics of thiophene rings near 0.2 V with an excellent rate performance. This novel rigid-flexible block structure increases the capacity of thiophene-based anode without the introduction of additional active groups, which provides new insights for the design of conjugated organic anode materials.","PeriodicalId":149,"journal":{"name":"ChemSusChem","volume":" ","pages":"e202501609"},"PeriodicalIF":6.6,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145190495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Scalable Extraction of High-Purity Hemicellulose from Biomass via Urea-Assisted Tetramethylammonium Hydroxide and Membrane Separation. 尿素辅助四甲基氢氧化铵-膜分离萃取生物质中高纯度半纤维素。

IF 6.6 2区化学

ChemSusChem Pub Date : 2025-09-30 DOI: 10.1002/cssc.202501780

Meng Liu, Guoqiang Han, Yaxu Sun, Lei Zhang, Qi Tang, Kaixia Liang, Qinqin Xia, Shuo Dou, Xiaoxue Song, Haipeng Yu, Yongzhuang Liu

{"title":"Scalable Extraction of High-Purity Hemicellulose from Biomass via Urea-Assisted Tetramethylammonium Hydroxide and Membrane Separation.","authors":"Meng Liu, Guoqiang Han, Yaxu Sun, Lei Zhang, Qi Tang, Kaixia Liang, Qinqin Xia, Shuo Dou, Xiaoxue Song, Haipeng Yu, Yongzhuang Liu","doi":"10.1002/cssc.202501780","DOIUrl":"https://doi.org/10.1002/cssc.202501780","url":null,"abstract":"Efficient fractionation of hemicellulose from lignocellulosic biomass is vital for its valorization. In this study, corncob is first used as a model feedstock due to its well-structured lignocellulosic composition. Through systematic optimization of parameters such as alkali concentration, temperature, reaction time, alkali type, and cosolvent, tetramethylammonium hydroxide (TMAH) is identified as the best choice for isolating hemicellulose with high purity. By further implementing optimized conditions (80 °C for 1 h), a urea-assisted TMAH system (comprising 6 wt% TMAH and 10 wt% urea) achieves a 74.94% extraction yield of high-purity hemicellulose (85.7%) from corncob. The versatility of this system is then confirmed by its ability to dissolve hemicellulose from various biomass sources, including Chinese fir, poplar, and bamboo. Additionally, integrating membrane separation within the TMAH-urea system enables scalable fractionation, significantly cutting down acid consumption and antisolvent use by at least 80%. A 500-fold scale-up maintains a close yield of 70.14%. The solvent system exhibits excellent recyclability, sustaining a yield of 64.74% after three recycling cycles. This research highlights the essential roles of alkaline platforms and membrane technology in the industrial production of high-purity hemicellulose.","PeriodicalId":149,"journal":{"name":"ChemSusChem","volume":" ","pages":"e202501780"},"PeriodicalIF":6.6,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145190530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Gas Diffusivity in Fuel Electrode on Initial Durability for Solid Oxide Cells during Steam/CO₂ Coelectrolysis. 蒸汽/CO2共电解过程中燃料电极气体扩散率对固体氧化物电池初始耐久性的影响。

IF 6.6 2区化学

ChemSusChem Pub Date : 2025-09-30 DOI: 10.1002/cssc.202501182

Hirofumi Sumi, Mizuki Momai, Yohei Tanaka

{"title":"Effect of Gas Diffusivity in Fuel Electrode on Initial Durability for Solid Oxide Cells during Steam/CO2 Coelectrolysis.","authors":"Hirofumi Sumi, Mizuki Momai, Yohei Tanaka","doi":"10.1002/cssc.202501182","DOIUrl":"https://doi.org/10.1002/cssc.202501182","url":null,"abstract":"For solid oxide electrolysis cells (SOECs) during steam/CO2 coelectrolysis, the slopes of current density-voltage curves frequently increase at high current densities due to an increase in gas diffusion overpotential. The gas diffusivity strongly affects the initial performance for coelectrolysis SOECs. The durabilities of SOECs during coelectrolysis are generally lower compared to those of SOECs during steam-only electrolysis and solid oxide fuel cells during power generation. The present work investigates the effect of gas diffusivity in the fuel electrode on the initial durability during coelectrolysis at H2O/CO2 = 2 and 700 °C for fuel electrode-supported microtubular SOECs with varying geometries and using different fuel electrode materials. Upon varying the geometries and materials, high initial performances are observed for cells with low polarization resistances associated with the gas-related processes in the fuel electrode. However, the initial deterioration during coelectrolysis remains unchanged for cells using the same fuel electrode materials with different geometries. Material variations lead to changes in the fuel electrode microstructure, such as the pore size and the pore distribution, which in turn affect the gas diffusivity in the fuel electrode substrate. Additionally, it is found that microstructural variations in the fuel electrode significantly influence the initial durability of coelectrolysis SOECs.","PeriodicalId":149,"journal":{"name":"ChemSusChem","volume":" ","pages":"e202501182"},"PeriodicalIF":6.6,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145190569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synergistic Effect of AlCl₃ and Glycerol/ChCl in the Conversion and Dissolution of Lignin in Three-Constituent Deep Eutectics. AlCl3和甘油/ChCl在三组分深共晶木质素转化和溶解中的协同作用。

IF 6.6 2区化学

ChemSusChem Pub Date : 2025-09-30 DOI: 10.1002/cssc.202501796

Chenyu Ge, Juan Zhao, Ruoyu Zhang, Changwei Hu

{"title":"Synergistic Effect of AlCl3 and Glycerol/ChCl in the Conversion and Dissolution of Lignin in Three-Constituent Deep Eutectics.","authors":"Chenyu Ge, Juan Zhao, Ruoyu Zhang, Changwei Hu","doi":"10.1002/cssc.202501796","DOIUrl":"https://doi.org/10.1002/cssc.202501796","url":null,"abstract":"\"Lignin-first\" approach has attracted much attention on biomass utilization. Deep eutectic solvents (DESs) have the advantages of being versatile and tunable, among which three-constituent DES (glycerol/ChCl/AlCl3·6H2O) is found efficient for lignin extraction in biomass fractionation. Herein, how this kind of three-constituent DES affects the fractionation efficiency of lignin is investigated in detail at molecular level. Molecular dynamics simulations indicate that glycerol and ChCl provide strong interaction with the small fragments of lignin. Chloride anion is found to contribute mostly electrostatic interaction to lignin-solvent interactions, while choline cation and glycerol provide strong van der Waals interaction, which also contributes to the higher solubility of the small fragments of lignin. According to DFT calculations, Al3+ is more likely to coordinate with glycerol, forming chelated [Al(C3H8O3)2]3+, which can effectively catalyze the cleavage of βO4 bond of lignin through Lewis acid catalysis, including the isomerization of hydroxyl via E1 and Markovnikov reactions, significantly reducing the energy barrier by about 24 kcal mol-1, favoring the fractionation of lignin. This mechanism is also verified experimentally. This work gives out deep understanding for lignin fractionation in solvent pretreatment, providing guiding clues for the design of more efficient solvent system in biomass utilization.","PeriodicalId":149,"journal":{"name":"ChemSusChem","volume":" ","pages":"e202501796"},"PeriodicalIF":6.6,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145197584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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