Pub Date : 2024-04-10DOI: 10.1016/j.gce.2024.04.002
Ruichang Xue , Rongrong Deng , Yan Li , Mengqiu Gao , Jiafu Wang , Qibo Zhang
Developing electrocatalysts with excellent activity, high stability, and low cost is vital for large-scale hydrogen production through electrochemical water splitting. Herein, a bifunctional Ni–Fe–P catalyst in situ grown on Fe foam (Ni–Fe–P/FF) is developed by a simple one-step solvothermal process in the deep eutectic solvent (DES) of ethylene glycol and choline chloride (named Ethaline). The unique solvent environment of Ethaline assisted with the regulating effect of the introduced Fe(III) ions shows an essential role in governing the preparation process. The developed Ni–Fe–P/FF acts as the efficient bifunctional electrocatalyst for water splitting in 1.0 M KOH, requiring overpotentials of 82 mV (229 mV) and 263 mV (370 mV) to deliver 10 mA cm−2 (100 mA cm−2) for oxygen and hydrogen evolution reactions, respectively. Furthermore, the self-supported catalyst-assembled electrolyzer also exhibits good catalytic performance with a low voltage of 1.83 V to drive 100 mA cm−2 and good stability over 100 h. This work offers a facile approach to fabricating high-performance bifunctional Ni–Fe–P electrocatalysts to catalyze water splitting.
开发具有优异活性、高稳定性和低成本的电催化剂对于通过电化学水分离大规模制氢至关重要。在此，我们在乙二醇和氯化胆碱的深共晶溶剂（DES）（命名为乙酞）中，通过简单的一步溶剂热法，开发出了一种在铁泡沫上原位生长的双功能镍-芴-P 催化剂（镍-芴-P/FF）。乙酞的独特溶剂环境以及引入的铁（III）离子的调节作用在制备过程中发挥了重要作用。所开发的 Ni-Fe-P/FF 可作为高效的双功能电催化剂在 1.0 M KOH 中进行水分离，氧气和氢气进化反应分别需要 82 mV (229 mV) 和 263 mV (370 mV) 的过电位才能达到 10 mA cm-2 (100 mA cm-2)。此外，自支撑催化剂组装的电解槽也表现出良好的催化性能，只需 1.83 V 的低电压即可驱动 100 mA cm-2 的反应，并且在 100 小时内具有良好的稳定性。这项工作为制造催化水分离的高性能双功能 Ni-Fe-P 电催化剂提供了一种简便的方法。
{"title":"Deep eutectic solvent-induced controllable synthesis of bifunctional Ni–Fe–P catalysts for electrochemical water splitting","authors":"Ruichang Xue , Rongrong Deng , Yan Li , Mengqiu Gao , Jiafu Wang , Qibo Zhang","doi":"10.1016/j.gce.2024.04.002","DOIUrl":"10.1016/j.gce.2024.04.002","url":null,"abstract":"<div><div>Developing electrocatalysts with excellent activity, high stability, and low cost is vital for large-scale hydrogen production through electrochemical water splitting. Herein, a bifunctional Ni–Fe–P catalyst <em>in situ</em> grown on Fe foam (Ni–Fe–P/FF) is developed by a simple one-step solvothermal process in the deep eutectic solvent (DES) of ethylene glycol and choline chloride (named Ethaline). The unique solvent environment of Ethaline assisted with the regulating effect of the introduced Fe(III) ions shows an essential role in governing the preparation process. The developed Ni–Fe–P/FF acts as the efficient bifunctional electrocatalyst for water splitting in 1.0 M KOH, requiring overpotentials of 82 mV (229 mV) and 263 mV (370 mV) to deliver 10 mA cm<sup>−2</sup> (100 mA cm<sup>−2</sup>) for oxygen and hydrogen evolution reactions, respectively. Furthermore, the self-supported catalyst-assembled electrolyzer also exhibits good catalytic performance with a low voltage of 1.83 V to drive 100 mA cm<sup>−2</sup> and good stability over 100 h. This work offers a facile approach to fabricating high-performance bifunctional Ni–Fe–P electrocatalysts to catalyze water splitting.</div></div>","PeriodicalId":66474,"journal":{"name":"Green Chemical Engineering","volume":"6 1","pages":"Pages 93-101"},"PeriodicalIF":9.1,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140776231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-06DOI: 10.1016/j.gce.2024.04.001
Yansai Bao, Yang Wang, Chuanyu Yan, Zhimin Xue
Deep eutectic solvents (DESs) are recognized as an emerging green solvent that can be applied to lignocellulosic biomass fractionation and valorization. A deep understanding of the physicochemical properties of DESs is of great significance to the development of biomass processing technology. Meanwhile, the importance of DESs is manifested by an increasing number of value-added chemicals derived from lignocellulose in DESs. This review focuses on the physicochemical properties of different types of DESs as well as examples of their application to lignocellulosic fractionation. Additionally, recent advancements in research on converting products from DESs fractionation into bio-based materials are highlighted. Potential obstacles and prospects for integrating DESs into biomass processing are also discussed.
深共晶溶剂（DESs）被认为是一种新兴的绿色溶剂，可用于木质纤维素生物质的分馏和增值。深入了解 DESs 的物理化学特性对生物质加工技术的发展具有重要意义。同时，DESs 的重要性还表现在越来越多的增值化学品从 DESs 中的木质纤维素中提取出来。本综述重点介绍了不同类型 DES 的物理化学特性及其在木质纤维素分馏中的应用实例。此外，还重点介绍了将 DESs 分馏产品转化为生物基材料的最新研究进展。还讨论了将 DESs 纳入生物质加工的潜在障碍和前景。
{"title":"Deep eutectic solvents for fractionation and valorization of lignocellulose","authors":"Yansai Bao, Yang Wang, Chuanyu Yan, Zhimin Xue","doi":"10.1016/j.gce.2024.04.001","DOIUrl":"10.1016/j.gce.2024.04.001","url":null,"abstract":"<div><div>Deep eutectic solvents (DESs) are recognized as an emerging green solvent that can be applied to lignocellulosic biomass fractionation and valorization. A deep understanding of the physicochemical properties of DESs is of great significance to the development of biomass processing technology. Meanwhile, the importance of DESs is manifested by an increasing number of value-added chemicals derived from lignocellulose in DESs. This review focuses on the physicochemical properties of different types of DESs as well as examples of their application to lignocellulosic fractionation. Additionally, recent advancements in research on converting products from DESs fractionation into bio-based materials are highlighted. Potential obstacles and prospects for integrating DESs into biomass processing are also discussed.</div></div>","PeriodicalId":66474,"journal":{"name":"Green Chemical Engineering","volume":"6 1","pages":"Pages 21-35"},"PeriodicalIF":9.1,"publicationDate":"2024-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140765455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-04DOI: 10.1016/j.gce.2024.03.005
Xuan Zhang , Yue Zhang , Haoran Li , Jia Yao
Solvents are commonly added into protic ionic liquids (PILs) to reduce viscosity in practical applications. Understanding the relationship between the structure and properties of PILs mixed with solvents is also essential for tailoring specific applications, however, such research is limited. In this study, we measured and compared the density, viscosity, and conductivity of three mixed systems: n-butylammonium butyrate ionic liquid (PIL) mixing with N-butyric acid (PrCOOH), PIL-N-butylamine (BuNH2), and PIL-N-butanol (BuOH). Small- and wide-angle X-ray scattering (S/WAXS), molecular dynamics (MD) simulation, and electron paramagnetic resonance (EPR) techniques were used to explore their inherent structural differences. The results indicate that the properties of the PIL-BuOH and PIL-PrCOOH systems exhibit more overall similarity in trends compared to the PIL-BuNH2 system. However, when the molar fraction of alcohol or acid exceeds 0.8, structural differences between the two systems lead to the differences in properties. The hydrogen bond network between the BuOH molecules outside the ion cluster leads to higher viscosity and conductivity than the PIL-PrCOOH system. However, the strong hydrogen bond between PrCOOH and anions will replace the position of cations and form spherical clusters. This research highlights how distinct structures influence diverse properties, providing deeper insights into the structure-property relationship.
{"title":"The different structure and properties of protic ionic liquid in alcohol from acid and base: butylammonium butyrate mixing with butanol, butyric acid, and butylamine respectively","authors":"Xuan Zhang , Yue Zhang , Haoran Li , Jia Yao","doi":"10.1016/j.gce.2024.03.005","DOIUrl":"10.1016/j.gce.2024.03.005","url":null,"abstract":"<div><div>Solvents are commonly added into protic ionic liquids (PILs) to reduce viscosity in practical applications. Understanding the relationship between the structure and properties of PILs mixed with solvents is also essential for tailoring specific applications, however, such research is limited. In this study, we measured and compared the density, viscosity, and conductivity of three mixed systems: <em>n</em>-butylammonium butyrate ionic liquid (PIL) mixing with <em>N</em>-butyric acid (PrCOOH), PIL-<em>N</em>-butylamine (BuNH<sub>2</sub>), and PIL-<em>N</em>-butanol (BuOH). Small- and wide-angle X-ray scattering (S/WAXS), molecular dynamics (MD) simulation, and electron paramagnetic resonance (EPR) techniques were used to explore their inherent structural differences. The results indicate that the properties of the PIL-BuOH and PIL-PrCOOH systems exhibit more overall similarity in trends compared to the PIL-BuNH<sub>2</sub> system. However, when the molar fraction of alcohol or acid exceeds 0.8, structural differences between the two systems lead to the differences in properties. The hydrogen bond network between the BuOH molecules outside the ion cluster leads to higher viscosity and conductivity than the PIL-PrCOOH system. However, the strong hydrogen bond between PrCOOH and anions will replace the position of cations and form spherical clusters. This research highlights how distinct structures influence diverse properties, providing deeper insights into the structure-property relationship.</div></div>","PeriodicalId":66474,"journal":{"name":"Green Chemical Engineering","volume":"6 1","pages":"Pages 85-92"},"PeriodicalIF":9.1,"publicationDate":"2024-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140789223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study proposed a new cyclone separator, using a designed nozzle inside the traditional cyclone separator, which significantly improved the efficiency of separating fine particles while maintaining an essentially unchanged pressure drop. Firstly, computational fluid dynamics (CFD) was used to compare the flow characteristics of the new cyclone separator with those of the traditional cyclone separator. On this basis, this study comprehensively investigated the pressure drop and separation efficiency of two separators under varying working conditions. The new separator achieved a separation efficiency for particles with a particle size of 1 μm that was approximately 45% higher than that of the traditional separator when the inlet velocity was 2–10 m/s. Besides, the pressure drop of the cyclone separator remained unchanged while the separation efficiency increased by 46% at an inlet flow rate of 2 m/s. The influence of the outlet area of the nozzle inside the new cyclone separator on the separation efficiency and pressure drop was analyzed, and the outlet area of the nozzle with the best overall performance was determined. It was found that the overall performance of the new cyclone separator is optimal when the nozzle outlet area is S/f = 2 cm. Finally, an energy-saving cyclone separator with high separation efficiency was developed through an in-depth study of the variation of particle motion configuration with time. It is worth noting that this study provides a guidance for the flow field analysis and geometry optimization of new gas-solid separators, not limited to cyclone separators.
本研究提出了一种新型旋风分离器，它在传统旋风分离器内部设计了一个喷嘴，在保持压降基本不变的情况下，显著提高了分离细颗粒的效率。首先，利用计算流体动力学（CFD）比较了新型旋风分离器与传统旋风分离器的流动特性。在此基础上，本研究全面考察了两种分离器在不同工作条件下的压降和分离效率。当入口速度为 2-10 m/s 时，新型分离器对粒径为 1 μm 的颗粒的分离效率比传统分离器高出约 45%。此外，当入口流速为 2 m/s 时，旋风分离器的压降保持不变，而分离效率却提高了 46%。分析了新型旋风分离器内部喷嘴出口面积对分离效率和压降的影响，并确定了综合性能最佳的喷嘴出口面积。结果发现，当喷嘴出口面积为 S/f = 2 cm 时，新型旋风分离器的整体性能最佳。最后，通过深入研究颗粒运动构型随时间的变化，开发出一种具有高分离效率的节能旋风分离器。值得注意的是，本研究为新型气固分离器的流场分析和几何优化提供了指导，而不仅限于旋风分离器。
{"title":"Numerical study on performance optimization and flow mechanism of a new cyclone separator","authors":"Mengjing Feng , Chengmin Gui , Yangfan Zhou , Zhigang Lei","doi":"10.1016/j.gce.2024.03.006","DOIUrl":"10.1016/j.gce.2024.03.006","url":null,"abstract":"<div><div>This study proposed a new cyclone separator, using a designed nozzle inside the traditional cyclone separator, which significantly improved the efficiency of separating fine particles while maintaining an essentially unchanged pressure drop. Firstly, computational fluid dynamics (CFD) was used to compare the flow characteristics of the new cyclone separator with those of the traditional cyclone separator. On this basis, this study comprehensively investigated the pressure drop and separation efficiency of two separators under varying working conditions. The new separator achieved a separation efficiency for particles with a particle size of 1 μm that was approximately 45% higher than that of the traditional separator when the inlet velocity was 2–10 m/s. Besides, the pressure drop of the cyclone separator remained unchanged while the separation efficiency increased by 46% at an inlet flow rate of 2 m/s. The influence of the outlet area of the nozzle inside the new cyclone separator on the separation efficiency and pressure drop was analyzed, and the outlet area of the nozzle with the best overall performance was determined. It was found that the overall performance of the new cyclone separator is optimal when the nozzle outlet area is <em>S</em>/<em>f</em> = 2 cm. Finally, an energy-saving cyclone separator with high separation efficiency was developed through an in-depth study of the variation of particle motion configuration with time. It is worth noting that this study provides a guidance for the flow field analysis and geometry optimization of new gas-solid separators, not limited to cyclone separators.</div></div>","PeriodicalId":66474,"journal":{"name":"Green Chemical Engineering","volume":"6 1","pages":"Pages 76-84"},"PeriodicalIF":9.1,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140403664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-22DOI: 10.1016/j.gce.2024.03.004
Ruihong Liu , Dongzhi Liu , Xiang Ma
Here, an innovative approach to achieve near-infrared (NIR) long-lived circularly polarized luminescence (CPL) in amorphous organic polymer materials was achieved. By co-doping bi-naphthalene derivative R/S-BPN as energy donors with porphyrin derivative TPPOH as energy acceptor into PVA polymer matrix, the NIR long-lifetime fluorescence was successfully realized through the principles of triplet-to-singlet Förster resonance energy transfer (TS-FRET). Photophysical characterizations revealed distinct room temperature phosphorescence (RTP) emission peaks and phosphorescence lifetimes for different donor-acceptor ratios. The TS-FRET process facilitated extended lifetime and red-shifted emission of the acceptor TPPOH. Moreover, employing the chiral donor R/S-BPN as chiral seeds to establish chiral environments facilitated the achievement of near-infrared CPL. These findings offer a novel and practical strategy for achieving long-wavelength and long-lifetime CPL fluorescence without complex molecular engineering, presenting potential applications in various technological fields.
{"title":"Near-infrared long-lifetime emission via triplet-to-singlet Förster resonance energy transfer","authors":"Ruihong Liu , Dongzhi Liu , Xiang Ma","doi":"10.1016/j.gce.2024.03.004","DOIUrl":"10.1016/j.gce.2024.03.004","url":null,"abstract":"<div><div>Here, an innovative approach to achieve near-infrared (NIR) long-lived circularly polarized luminescence (CPL) in amorphous organic polymer materials was achieved. By co-doping bi-naphthalene derivative R/S-BPN as energy donors with porphyrin derivative TPPOH as energy acceptor into PVA polymer matrix, the NIR long-lifetime fluorescence was successfully realized through the principles of triplet-to-singlet Förster resonance energy transfer (TS-FRET). Photophysical characterizations revealed distinct room temperature phosphorescence (RTP) emission peaks and phosphorescence lifetimes for different donor-acceptor ratios. The TS-FRET process facilitated extended lifetime and red-shifted emission of the acceptor TPPOH. Moreover, employing the chiral donor R/S-BPN as chiral seeds to establish chiral environments facilitated the achievement of near-infrared CPL. These findings offer a novel and practical strategy for achieving long-wavelength and long-lifetime CPL fluorescence without complex molecular engineering, presenting potential applications in various technological fields.</div></div>","PeriodicalId":66474,"journal":{"name":"Green Chemical Engineering","volume":"6 1","pages":"Pages 1-5"},"PeriodicalIF":9.1,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140273626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-18DOI: 10.1016/j.gce.2024.03.003
Wei Zhao , Shahid Zaman , Shuhan Kong , Mengqi Liu , Jiexin Zou , Zhen Zhang , Hui Ning , Feng Peng , Yunfei Li , Min Wang , Mingbo Wu
Proton exchange membrane fuel cells (PEMFCs) are efficient and zero emission energy conversion technology with promising application prospects towards carbon neutrality. The PEMFC's performance is largely affected by the poor water management, which is a substantial concern for long term durability. Herein, we overview the water management problems in PEMFCs, such as flooding and dehydration of membrane electrode assembly and analyze the causes and their impacts on the device performance. Major problems such as flooding impedes the gas transport and electrode reactions, while dehydration increases the membrane resistance and hinders proton transport. We have thoroughly overviewed several electrochemical and physicochemical diagnostic techniques for water management in PEMFCs. Additionally, material development and optimization approaches for the flow field structural design are explored in order to improve mass transport and wetting characteristics for optimized water management. Therefore, it is anticipated that this review will provide insights into the effective operation of PEMFCs as well as practical guidance for resolving water management issues in PEMFCs and associated technologies, like PEM water and CO2 electrolyzers.
{"title":"Optimization strategies and diagnostic techniques for water management in proton exchange membrane fuel cells","authors":"Wei Zhao , Shahid Zaman , Shuhan Kong , Mengqi Liu , Jiexin Zou , Zhen Zhang , Hui Ning , Feng Peng , Yunfei Li , Min Wang , Mingbo Wu","doi":"10.1016/j.gce.2024.03.003","DOIUrl":"10.1016/j.gce.2024.03.003","url":null,"abstract":"<div><div>Proton exchange membrane fuel cells (PEMFCs) are efficient and zero emission energy conversion technology with promising application prospects towards carbon neutrality. The PEMFC's performance is largely affected by the poor water management, which is a substantial concern for long term durability. Herein, we overview the water management problems in PEMFCs, such as flooding and dehydration of membrane electrode assembly and analyze the causes and their impacts on the device performance. Major problems such as flooding impedes the gas transport and electrode reactions, while dehydration increases the membrane resistance and hinders proton transport. We have thoroughly overviewed several electrochemical and physicochemical diagnostic techniques for water management in PEMFCs. Additionally, material development and optimization approaches for the flow field structural design are explored in order to improve mass transport and wetting characteristics for optimized water management. Therefore, it is anticipated that this review will provide insights into the effective operation of PEMFCs as well as practical guidance for resolving water management issues in PEMFCs and associated technologies, like PEM water and CO<sub>2</sub> electrolyzers.</div></div>","PeriodicalId":66474,"journal":{"name":"Green Chemical Engineering","volume":"6 3","pages":"Pages 291-304"},"PeriodicalIF":9.1,"publicationDate":"2024-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140272479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-15DOI: 10.1016/S2666-9528(24)00014-1
{"title":"Outside Back Cover","authors":"","doi":"10.1016/S2666-9528(24)00014-1","DOIUrl":"https://doi.org/10.1016/S2666-9528(24)00014-1","url":null,"abstract":"","PeriodicalId":66474,"journal":{"name":"Green Chemical Engineering","volume":"5 2","pages":"Page OBC"},"PeriodicalIF":0.0,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666952824000141/pdfft?md5=9217f8a0152dadcbfb0745070399bbd2&pid=1-s2.0-S2666952824000141-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140138845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-15DOI: 10.1016/S2666-9528(24)00006-2
{"title":"OFC: Outside Front Cover","authors":"","doi":"10.1016/S2666-9528(24)00006-2","DOIUrl":"https://doi.org/10.1016/S2666-9528(24)00006-2","url":null,"abstract":"","PeriodicalId":66474,"journal":{"name":"Green Chemical Engineering","volume":"5 2","pages":"Page OFC"},"PeriodicalIF":0.0,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666952824000062/pdfft?md5=46b09bca0774669feabd2cfd58d172f5&pid=1-s2.0-S2666952824000062-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140138833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Solar-powered water splitting is an up-and-coming method for hydrogen production. Still, it faces several challenges, including improving light responsiveness, maximizing utilization of photocatalyst active sites, and effectively utilizing photo-induced carriers to prevent low hydrogen production. In this research, we propose an approach for designing a 2D/2D heterostructure catalyst, the Cd-TCPP(Pt)@CdS, which consists of 2D CdS nanosheets (NSs) and a 2D metal-organic framework (MOF) with Pt active sites (Cd-TCPP(Pt)), aiming to achieve highly efficient visible-light-driven hydrogen evolution. Firstly, CdS NSs exhibit excellent responsiveness to visible light, ensuring robust generation of photo-induced carriers. Secondly, the 2D MOF provides abundant Pt active sites, enhancing electron utilization and reducing the energy barrier for proton reduction. Compared to pure CdS NSs (which demonstrate a hydrogen production activity of 1220 μmol/g/h), the newly designed 2D/2D composite catalyst Cd-TCPP(Pt)@CdS exhibits an activity of 13,434 μmol/g/h, representing an 11-fold increase. Impressively, Cd-TCPP(Pt)@CdS maintains a high activity of 3062 μmol/g/h even under sunlight. Density functional theory (DFT) calculations were employed to investigate the principle of proton reduction. The suitable bandgap of CdS and energy gap of 2D Cd-TCPP(Pt) contribute to their strong interaction and consequently higher efficiency in hydrogen evolution. The Pt-single atom (Pt-SA) also provides sites with low free energy for proton reduction, contributing to improved activity. The photocatalytic performance of Cd-TCPP(Pt)@CdS NSs composites demonstrates a synergistic effect between the 2D inorganic semiconductor and the 2D MOF containing the Pt-site, resulting in enhanced utilization of photo-induced carriers and atoms.
{"title":"Boosting visible-light-driven hydrogen evolution through Pt site anchored 2D/2D heterostructure catalyst: Cd-TCPP(Pt)@CdS","authors":"Guo-Wei Guan, Yi-Tao Li, Li-Ping Zhang, Su-Tao Zheng, Si-Chao Liu, Hao-Ling Lan, Qing-Yuan Yang","doi":"10.1016/j.gce.2024.03.002","DOIUrl":"10.1016/j.gce.2024.03.002","url":null,"abstract":"<div><div>Solar-powered water splitting is an up-and-coming method for hydrogen production. Still, it faces several challenges, including improving light responsiveness, maximizing utilization of photocatalyst active sites, and effectively utilizing photo-induced carriers to prevent low hydrogen production. In this research, we propose an approach for designing a 2D/2D heterostructure catalyst, the Cd-TCPP(Pt)@CdS, which consists of 2D CdS nanosheets (NSs) and a 2D metal-organic framework (MOF) with Pt active sites (Cd-TCPP(Pt)), aiming to achieve highly efficient visible-light-driven hydrogen evolution. Firstly, CdS NSs exhibit excellent responsiveness to visible light, ensuring robust generation of photo-induced carriers. Secondly, the 2D MOF provides abundant Pt active sites, enhancing electron utilization and reducing the energy barrier for proton reduction. Compared to pure CdS NSs (which demonstrate a hydrogen production activity of 1220 μmol/g/h), the newly designed 2D/2D composite catalyst Cd-TCPP(Pt)@CdS exhibits an activity of 13,434 μmol/g/h, representing an 11-fold increase. Impressively, Cd-TCPP(Pt)@CdS maintains a high activity of 3062 μmol/g/h even under sunlight. Density functional theory (DFT) calculations were employed to investigate the principle of proton reduction. The suitable bandgap of CdS and energy gap of 2D Cd-TCPP(Pt) contribute to their strong interaction and consequently higher efficiency in hydrogen evolution. The Pt-single atom (Pt-SA) also provides sites with low free energy for proton reduction, contributing to improved activity. The photocatalytic performance of Cd-TCPP(Pt)@CdS NSs composites demonstrates a synergistic effect between the 2D inorganic semiconductor and the 2D MOF containing the Pt-site, resulting in enhanced utilization of photo-induced carriers and atoms.</div></div>","PeriodicalId":66474,"journal":{"name":"Green Chemical Engineering","volume":"6 1","pages":"Pages 68-75"},"PeriodicalIF":9.1,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140278325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-15DOI: 10.1016/j.gce.2024.03.001
Beihang Xu, Yao An, Jinghao Zhu, Yonglin He
The perception of light is crucial for humans to explore the external world. However, challenges of current planar photosensors include inherent limitations in depth of field and field of view. Flexible electronic devices offer a solution to this issue by allowing adaptation to curved surfaces, ensuring stable interfaces and excellent signal quality. Compared to photoelectric sensors, flexible photosensors based on photothermal conversion can respond to a wider spectrum of light, simplify design processes, and overcome issues such as instability and high toxicity. The review introduces progress on the flexible photosensors based on photothermal conversion, and summarizes the combination of photothermal conversion with pyroelectric, thermoelectric, and thermoresistive effects, allowing for the conversion of light signals into thermal signals and then into electric signals. Additionally, the review outlines the challenges for future research in this field.
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