Journal of Materials Chemistry A最新文献_第9页

Advances in Direct Optical Lithography of Nanomaterials 纳米材料直接光学光刻技术的进展

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2024-11-05 DOI: 10.1039/d4ta06618a

Yuelin Yang, Jie Guan, Nannan Zhang, Lin Ru, Yihao Zou, Yuanyuan Wang

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Oxygen vacancy mediated and enhanced metal-P bonds for stabilizing reconstruction for alkaline freshwater and seawater electrolysis 氧空位介导和增强金属-P 键，用于碱性淡水和海水电解的稳定重建

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2024-11-05 DOI: 10.1039/d4ta06201a

Lei Jin, Hui Xu, Kun Wang, Yang Liu, Xingyue Qian, Guangyu He, Haiqun Chen

{"title":"Oxygen vacancy mediated and enhanced metal-P bonds for stabilizing reconstruction for alkaline freshwater and seawater electrolysis","authors":"Lei Jin, Hui Xu, Kun Wang, Yang Liu, Xingyue Qian, Guangyu He, Haiqun Chen","doi":"10.1039/d4ta06201a","DOIUrl":"https://doi.org/10.1039/d4ta06201a","url":null,"abstract":"The performance of electrochemical water splitting can be effectively enhanced by preventing irreversible structural distortion that leads to the leaching of active elements. In this study, a porous grass-shaped Fe2P/Ni5P4-Ov catalyst was synthesized using oxygen vacancies (Ov), exhibiting robust M–P bonds. Both experimental and theoretical investigations show that these strong M–P bonds play a crucial role in stabilizing electrochemical transformation of the precursor catalyst to active Ni, Fe-(oxy)hydroxide species, thereby reducing Fe loss. Additionally, the enhanced orbital coupling weakens the OH–H bonds in the H2O molecule. Remarkably, Fe2P/Ni5P4-Ov demonstrates exceptional OER and HER activity and stability in both alkaline freshwater and seawater solutions by preventing the leaching of Fe elements. This research underscores the transition from metal–organic frameworks to the evolution of metal oxides into metal phosphides and offers insights into inhibiting the leaching of active elements.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":null,"pages":null},"PeriodicalIF":11.9,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142580168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Thermodynamic assessment of Gd-doped CeO2 for microwave-assisted thermochemical reduction 用于微波辅助热化学还原的掺钆 CeO2 的热力学评估

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2024-11-05 DOI: 10.1039/d4ta05804f

Dongkyu Lee, Jaemin Yoo, Gunsu Yun, Hyungyu Jin

{"title":"Thermodynamic assessment of Gd-doped CeO2 for microwave-assisted thermochemical reduction","authors":"Dongkyu Lee, Jaemin Yoo, Gunsu Yun, Hyungyu Jin","doi":"10.1039/d4ta05804f","DOIUrl":"https://doi.org/10.1039/d4ta05804f","url":null,"abstract":"Microwave-assisted hydrogen production is a promising technology with the capability to decompose H2O into H2 economically. The potential of this technology depends on the parameter fr that measures the fraction of microwave energy directly contributing to the reduction reaction of metal oxides by extracting the lattice oxygen. We quantitatively examine fr for Gd-doped ceria (CeO2), a well-known benchmarked material, using the Van’t Hoff method. Our study reveals that approximately more than 1/2 of the reduction enthalpy is attributed to microwave energy, suggesting that fr exceeds 0.5. Simultaneously, we introduce a defect equilibria model to identify the contribution of fr and derive equilibrium constants for isolated defects and associated defects at T = 450 − 600 °C and P(O2) = 2 × 10-4 − 2.1 × 10-1 atm. The results advocate that microwave energy significantly contributes to defect formation at an alleviated condition (lower T, higher P(O2)) with shorter timescale compared to conventional thermal reduction. Our study reaffirms the importance of fr in microwave-assisted reduction and provides a new thermodynamics insight on the interaction between defects and microwave fields in doped ceria.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":null,"pages":null},"PeriodicalIF":11.9,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142580169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Gram-scale green synthesis of a highly stable cationic covalent organic framework for efficient and selective removal of ReO4-/99TcO4- 克级绿色合成高稳定性阳离子共价有机框架，用于高效和选择性去除 ReO4-/99TcO4-

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2024-11-05 DOI: 10.1039/d4ta06442a

Changxia Li, Justyna Florek, Patrick Guggenberger, Freddy Kleitz

{"title":"Gram-scale green synthesis of a highly stable cationic covalent organic framework for efficient and selective removal of ReO4-/99TcO4-","authors":"Changxia Li, Justyna Florek, Patrick Guggenberger, Freddy Kleitz","doi":"10.1039/d4ta06442a","DOIUrl":"https://doi.org/10.1039/d4ta06442a","url":null,"abstract":"Covalent organic frameworks (COFs) have developed as efficient and selective adsorbents to mitigate 99TcO4- contamination. However, the eco-friendly and scalable production of COF-based adsorbents for the removal of 99TcO4- has not yet been reported. This study explores the potential of a cationic COF (TpDB-COF) synthesized via a green hydrothermal method, achieving gram-scale yields per batch, thereby addressing a significant limitation of existing COF production methods. The TpDB-COF demonstrates an exceptional stability in strongly acidic conditions (2 weeks in 3 M HNO3), as well as in various organic solvents, making it suitable for harsh nuclear waste environments. Adsorption experiments using 99ReO4- as a surrogate for 99TcO4- show rapid adsorption kinetics, reaching near 100% removal efficiency within 1 min, a maximum adsorption capacity of 570 mg g-1 and excellent stability. Moreover, the COF maintains high selectivity for ReO4- even in the presence of competing anions such as SO42- and NO3-. These findings highlight that the hydrothermal synthesis is an effective method to synthesize COF adsorbents for effective removal of 99TcO4- and offers a sustainable approach for practical applications.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":null,"pages":null},"PeriodicalIF":11.9,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142580266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recent advances in the synergistic effects of organic conjugated materials and quantum dots on solar cells 有机共轭材料和量子点对太阳能电池协同效应的最新进展

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2024-11-05 DOI: 10.1039/d4ta04233f

Dae Hwan Lee, Chanhyeok Kim, Giwon Shin, Geoneop Choi, Sang Shin Park, Taiho Park, Sung Yun Son

引用次数: 0

Sacrificial Fe sites making 2D heterostructure an efficient catalyst for oxygen evolution reaction in alkaline seawater 人工铁位点使二维异质结构成为碱性海水中氧进化反应的高效催化剂

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2024-11-05 DOI: 10.1039/d4ta07179d

Suraj Loomba, Muhammad Waqas Khan, Ashakiran Maibam, Muhammad Haris, Sharafadeen Gbadamasi, Vasundhara Nettem, Seyed Mahdi Mousavi, Anton Tadich, Lars Thomsen, Karishma Jain, Babar Shabbir, Asif Mahmood, Ravichandar Babarao, Xian Jian, Nasir Mahmood

{"title":"Sacrificial Fe sites making 2D heterostructure an efficient catalyst for oxygen evolution reaction in alkaline seawater","authors":"Suraj Loomba, Muhammad Waqas Khan, Ashakiran Maibam, Muhammad Haris, Sharafadeen Gbadamasi, Vasundhara Nettem, Seyed Mahdi Mousavi, Anton Tadich, Lars Thomsen, Karishma Jain, Babar Shabbir, Asif Mahmood, Ravichandar Babarao, Xian Jian, Nasir Mahmood","doi":"10.1039/d4ta07179d","DOIUrl":"https://doi.org/10.1039/d4ta07179d","url":null,"abstract":"Hydrogen via direct seawater splitting is a viable option, but anodic oxygen evolution reaction (OER) faces challenges when seawater is used, and to realize seawater splitting at full potential, efficient and effective catalysts are needed. Here, we introduced a unique two-dimensional molybdenum oxide@iron oxide (MO@FO) heterostructure synthesized via a simple hydrothermal process for anodic OER in alkaline seawater. Chemically bonded two dissimilar oxides create a unique platform that only requires 1.52 and 1.72 V to achieve current densities of 100 and 500 mA cm-2, respectively, inalkaline seawater. MO@FO displayed anti-corrosive behavior as it possesses a low corrosion current of 9 nA cm-2 and a corrosion rate of only 0.036 μm/year. It inhibits chlorine evolution reaction and hypochlorite generation, confirmed by GC-MS and DPD tests, hence remained stable for over 1000 h. The DFT calculations show that MoO2 is the active centers in the heterostructure while addition of polyanions assists in the formation of a protective layer on the catalyst surface, providing additional protection against chloride ions. Hence, this study presents an effective and efficient strategy for stable anodic reactions in alkaline seawater for hydrogen production.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":null,"pages":null},"PeriodicalIF":11.9,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142580719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Restriction of Ce-MOF growth within ZSM zeolite for robust three-proofing thermoplastic polyurethane 限制 ZSM 沸石中 Ce-MOF 的生长，实现热塑性聚氨酯的稳健三防性能

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2024-11-05 DOI: 10.1039/d4ta05441e

Xue Bi, Kunpeng Song, Qianlong Li, Tao Lin, Ye-Tang Pan, Wei Wang, Jiyu He, Rongjie Yang

{"title":"Restriction of Ce-MOF growth within ZSM zeolite for robust three-proofing thermoplastic polyurethane","authors":"Xue Bi, Kunpeng Song, Qianlong Li, Tao Lin, Ye-Tang Pan, Wei Wang, Jiyu He, Rongjie Yang","doi":"10.1039/d4ta05441e","DOIUrl":"https://doi.org/10.1039/d4ta05441e","url":null,"abstract":"In recent years, there have been few reports on the application of zeolites in the field of flame retardants, although their excellent thermal stability indicates great potential as flame retardants. However, a key challenge that needs to be solved urgently is the compatibility between molecular sieves as inorganic fillers and polymer matrices, which directly affects their performance and stability in practical applications. In this work, ZSM-5 zeolite was used as the carrier, Ce ions were introduced through ion exchange, and the growth of Ce-MOF was restricted on its surface, and a Ce-MOF@ZSM-5 hybrid material was designed to improve the flame retardant and ultraviolet resistance properties of thermoplastic polyurethane elastomer (TPU). The absorbance value of TPU composites in the whole region is significantly higher than that of pure TPU, and its absorbance reaches 1.33. Compared with pure TPU, the peak heat release rate and peak smoke production rate of TPU/Ce-MOF@ZSM-5 composites were reduced by 26.0% and 34.8%, respectively. In addition, the chemical resistance of TPU composites has been significantly improved. This work provides the possibility of preparing three-proofing TPU materials with UV resistance, chemical resistance and fire resistance, and is expected to expand the application of TPU materials in other fields.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":null,"pages":null},"PeriodicalIF":11.9,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142580167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Novel multi-functional sites in boron-based bi-atom catalysts synergistically boost C-C coupling for efficient CO electroreduction towards ethanol 硼基双原子催化剂中的新型多功能位点可协同促进 C-C 耦合，从而实现高效的 CO 电还原制乙醇

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2024-11-04 DOI: 10.1039/d4ta04897k

T. D. Huong Bui, Tore Brinck

{"title":"Novel multi-functional sites in boron-based bi-atom catalysts synergistically boost C-C coupling for efficient CO electroreduction towards ethanol","authors":"T. D. Huong Bui, Tore Brinck","doi":"10.1039/d4ta04897k","DOIUrl":"https://doi.org/10.1039/d4ta04897k","url":null,"abstract":"The electrochemical CO reduction reaction (CORR) is faced by challenges in achieving high-value-added C2 products due to inefficient C–C bond formation and low selectivity. Using first-principles calculations, we propose a framework for boron-based bi-atom doping into a silicene monolayer (B-X@Si) to improve CORR catalytic efficiency. Transition metal (TM)-free B-B@Si and TM-containing B-Cu@Si serve as efficient bi-atom catalysts (BACs) with low limiting potentials (-0.28 and -0.63 V) and low activation barriers for C-C coupling (0.54 and 0.53 eV). The CO* binding strength of active sites with co-adsorbed CO* species follows the order TM < B < B-TM. Remarkably, the interplay within the B-TM pair strengthens CO* adsorption, driven by increased TM involvement, as characterized by the upward shift of the d-band center of TM in B-TM@Si relative to the Fermi level. The coupling kinetics depend on the reactivity of C(CHO*) and CO* fragments within the decoupled CHO-CO* intermediate. Intriguingly, hetero-B-TM@Si systems display a trade-off between stronger CHO* and weaker CO* binding compared to homo-B-B@Si. Among the TMs, Cu is the most appropriate partner for B; the moderate synergistic effect of the B-Cu pair resulting in the smallest augmented C-affinity (CHO*) is offset by the weakest CO* binding strength on Cu itself, ensuring rapid C–C coupling similar to that of B-B@Si. Our BACs offer unique multi-functional active sites due to participation of host atoms (Si*) adjacent to the bi-dopants; these Si-atoms stabilize adsorbates, facilitate the subsequent C–C coupling step, and protect the C–O bond for selective ethanol production. This study provides theoretical insights for the development of advanced BACs with novel multi-adsorbing sites and tailored charge redistribution that enhance CO-to-C2 conversion.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":null,"pages":null},"PeriodicalIF":11.9,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142574387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rational design of versatile 1D Ti-O-based core-shell nanostructures for efficient pollutant removal and solar fuel production 合理设计用于高效去除污染物和生产太阳能燃料的多功能一维 Ti-O 型核壳纳米结构

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2024-11-04 DOI: 10.1039/d4ta06083k

Qiang Wang, Xiaoqiang Zhan, Chenming Fan, Xiaofan Yang, Bing Li, Hong Liu, Yangjiang Wu, Kaihuan Zhang, Pengyi Tang

{"title":"Rational design of versatile 1D Ti-O-based core-shell nanostructures for efficient pollutant removal and solar fuel production","authors":"Qiang Wang, Xiaoqiang Zhan, Chenming Fan, Xiaofan Yang, Bing Li, Hong Liu, Yangjiang Wu, Kaihuan Zhang, Pengyi Tang","doi":"10.1039/d4ta06083k","DOIUrl":"https://doi.org/10.1039/d4ta06083k","url":null,"abstract":"The rational design of Ti-O-based nanocomposites is of great importance for achieving efficient solar energy conversion and storage. Herein, novel one-dimensional (1D) K2Ti6O13/TiO2 core-shell nanobelt composites were fabricated by a controlled hydrothermal method using 1D K2Ti6O13 nanobelts as precursors. The K2Ti6O13 derived TiO2 shells with thickness of 5 nm were in-situ grown on the K2Ti6O13 NBs with closely connected interfaces, which resulted in remarkably enhanced photoactivities for pollutant degradation, hydrogen production and CO2 reduction. Interestingly, the porous carbon paper supported photocatalysts could be used for pollutant removal via synergistic adsorption and photothermal catalysis. Moreover, such a 1D core-shell nanobelt photoanode also showed higher photoelectrochemical water-splitting performance than pure K2Ti6O13, and impressively the significantly accelerated and stable H2 production was achieved due to the presence of thermodynamically favorable glycerol oxidation reaction. Importantly, the high value-added formate was produced along with cathodic H2 generation, revealing a sustainable way for concurrent solar hydrogen generation and green biomass upgrading. It was demonstrated that the enhanced photoactivities of K2Ti6O13/TiO2 nanocomposites could be mainly attributed to their higher light absorption, increased surface reactive sites and especially the promoted charge separation over the S-scheme heterojunction. This work paves a new avenue to rationally design versatile and high-performance Ti-O-based nanostructure photocatalysts for environmental remediation and solar fuels production.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":null,"pages":null},"PeriodicalIF":11.9,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142574382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

AuPt nanostructures with a high hydrogen evolution reaction activity through a halide-mediated microwave assisted route 通过卤化物介导的微波辅助路线制备具有高氢气进化反应活性的金铂纳米结构

IF 11.9 2区材料科学

Journal of Materials Chemistry A Pub Date : 2024-11-04 DOI: 10.1039/d4ta04545a

Xuesong Zhang, Jesús Chacón-Borrero, Ren He, Jaume Gázquez, Miquel Torras, Andreu Cabot, Anna Roig, Pablo Guardia

{"title":"AuPt nanostructures with a high hydrogen evolution reaction activity through a halide-mediated microwave assisted route","authors":"Xuesong Zhang, Jesús Chacón-Borrero, Ren He, Jaume Gázquez, Miquel Torras, Andreu Cabot, Anna Roig, Pablo Guardia","doi":"10.1039/d4ta04545a","DOIUrl":"https://doi.org/10.1039/d4ta04545a","url":null,"abstract":"In light of the escalating scarcity and rising costs of platinum, it is imperative to take a strategic approach to its rational utilization as an electrocatalyst for the hydrogen evolution reaction (HER). In this study, we present a novel microwave (MW)-assisted synthesis route combined with the addition of halide ions, specifically chloride, for the synthesis of AuPt nanostructured electrocatalysts. By adjusting the Au : Pt ratio in solution, as well as the halide concentration, we achieve control over the composition, size, shape, and structure of the nanocrystals (NCs). Comparative analysis of the HER electrocatalytic activity revealed that samples produced in the presence of chloride exhibit reduced overpotentials and increased mass activities. Notably, when using a 1 : 4 Au : Pt ratio and 0.12 mmol of HCl, NCs display lower overpotential and Tafel slope values compared to commercial platinum carbon (Pt/C) catalyst (24 mV @ 10 mA cm−2 and 13 mV dec−1 compared to 31 mV @ 10 mA cm−2 and 30 mV dec−1 respectively). Moreover, this nanostructure exhibits a 6.9 fold higher mass activity compared to Pt/C (13.8 A mgPt−1 and 2.0 A mgPt−1, respectively). We attribute the enhancement in electrocatalytic performance to the formation of an Au-rich core supporting a Pt shell structure, which maximizes the exposure of Pt atoms. This synthesis route offers a pathway to produce Pt-based catalysts with superior electrocatalytic performance for HER, contributing to the rational use of Pt in green hydrogen production.","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":null,"pages":null},"PeriodicalIF":11.9,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142574383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0