Sustainable roofing configurations, including green and white roofs, can reduce rooftop surface temperatures compared to conventional surfaces and can therefore enhance photovoltaic (PV) system performance due to the temperature dependence of PV cells. Previous research, primarily experimental, recognized the synergy of combining PV with green or cool roofs. However, the influence of geographic and climatic factors on the performance of these combined systems, particularly in future climates affected by climate change, remains unclear. This work integrates three roof configurations (gravel, green, and white) into rooftop solar energy modeling across thirteen cities with different climate types, under current and future climate scenarios. Results indicate limited efficiency gains (< 2%) across all cities and climates, challenging previous findings. Yield is expected to increase in some cities receiving more solar irradiation in the future but decrease in others due to rising temperatures. Green and cool roofs can partially offset the effects of climate change on yield. PV‐white roofs consistently outperform PV‐green roofs, with the performance gap expected to widen in future climates. PV‐green roofs excel in tropical climates with high irradiation and precipitation levels. Overall, the outcomes of this study inform the design and planning of sustainable buildings in response to climate change challenges.
{"title":"Global Analysis of Combined Photovoltaic Green and Cool Roofs Under Climate Change","authors":"Lina Hassoun, Lauren M. Cook","doi":"10.1002/adsu.202400097","DOIUrl":"https://doi.org/10.1002/adsu.202400097","url":null,"abstract":"Sustainable roofing configurations, including green and white roofs, can reduce rooftop surface temperatures compared to conventional surfaces and can therefore enhance photovoltaic (PV) system performance due to the temperature dependence of PV cells. Previous research, primarily experimental, recognized the synergy of combining PV with green or cool roofs. However, the influence of geographic and climatic factors on the performance of these combined systems, particularly in future climates affected by climate change, remains unclear. This work integrates three roof configurations (gravel, green, and white) into rooftop solar energy modeling across thirteen cities with different climate types, under current and future climate scenarios. Results indicate limited efficiency gains (< 2%) across all cities and climates, challenging previous findings. Yield is expected to increase in some cities receiving more solar irradiation in the future but decrease in others due to rising temperatures. Green and cool roofs can partially offset the effects of climate change on yield. PV‐white roofs consistently outperform PV‐green roofs, with the performance gap expected to widen in future climates. PV‐green roofs excel in tropical climates with high irradiation and precipitation levels. Overall, the outcomes of this study inform the design and planning of sustainable buildings in response to climate change challenges.","PeriodicalId":7294,"journal":{"name":"Advanced Sustainable Systems","volume":null,"pages":null},"PeriodicalIF":7.1,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142191540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zheng Fu Liang, Yi Che Chen, Pei Kai Hsu, Alexandre Gloter, Jenn‐Ming Song, Shih Yun Chen
The photocatalytic (PC) behavior of CeO2–TiO2 hollow composites with different heterojunction structures are investigated. The composites are fabricated by combining TiO2 hollow spheres and CeO2 nanoparticles with changing the ratio between Ce and Ti. High‐resolution microscopic and spectroscopic analysis demonstrates that three types of cerium‐bearing structures form on the surface of the titania. The first involves Ce atoms adsorbed onto the surface of TiO2 particles. The second occurs with small CeO2 particles, ≈2 nm in size, resulting from the aggregation of the adsorbed Ce atoms, thus forming a CeO2–TiO2 heterojunction. The last type is obtained through the growth of the CeO2 particles up to 10 nm in size. All the CeO2–TiO2 composites exhibit enhanced photocatalytic degradation of methyl orange under visible light irradiation compared to mere CeO2 or TiO2 nanoparticles. The synergistic effect of these three structures leads to a competition between size effects and interface interactions, which affects the band alignment, the number of defects, and, consequently, the PC activity. The highest PC reaction rate constant under visible light reaches up to 0.017 min−1 and is achieved when the CeO2 nanoparticle size is smaller than its Debye length.
研究了具有不同异质结结构的 CeO2-TiO2 空心复合材料的光催化（PC）行为。这些复合材料是通过改变 Ce 和 Ti 的比例将 TiO2 空心球和 CeO2 纳米颗粒结合在一起而制成的。高分辨率显微镜和光谱分析表明，在二氧化钛表面形成了三种含铈结构。第一种是吸附在二氧化钛颗粒表面的 Ce 原子。第二种是吸附了 Ce 原子的小 CeO2 粒子（大小≈2 纳米）聚集在一起，形成 CeO2-TiO2 异质结。最后一种类型是通过生长大小达 10 纳米的 CeO2 颗粒获得的。与单纯的 CeO2 或 TiO2 纳米颗粒相比，所有 CeO2-TiO2 复合材料都能在可见光照射下提高甲基橙的光催化降解能力。这三种结构的协同效应导致了尺寸效应和界面相互作用之间的竞争，从而影响了带排列、缺陷数量，进而影响了 PC 活性。当 CeO2 纳米粒子的尺寸小于其 Debye 长度时，PC 在可见光下的最高反应速率常数可达 0.017 min-1。
{"title":"Exploring the Enhancement of Photocatalytic Performance in TiO2 based Hollow Composites: Size Effect of the Adsorbed CeO2 Particles","authors":"Zheng Fu Liang, Yi Che Chen, Pei Kai Hsu, Alexandre Gloter, Jenn‐Ming Song, Shih Yun Chen","doi":"10.1002/adsu.202400335","DOIUrl":"https://doi.org/10.1002/adsu.202400335","url":null,"abstract":"The photocatalytic (PC) behavior of CeO<jats:sub>2</jats:sub>–TiO<jats:sub>2</jats:sub> hollow composites with different heterojunction structures are investigated. The composites are fabricated by combining TiO<jats:sub>2</jats:sub> hollow spheres and CeO<jats:sub>2</jats:sub> nanoparticles with changing the ratio between Ce and Ti. High‐resolution microscopic and spectroscopic analysis demonstrates that three types of cerium‐bearing structures form on the surface of the titania. The first involves Ce atoms adsorbed onto the surface of TiO<jats:sub>2</jats:sub> particles. The second occurs with small CeO<jats:sub>2</jats:sub> particles, ≈2 nm in size, resulting from the aggregation of the adsorbed Ce atoms, thus forming a CeO<jats:sub>2</jats:sub>–TiO<jats:sub>2</jats:sub> heterojunction. The last type is obtained through the growth of the CeO<jats:sub>2</jats:sub> particles up to 10 nm in size. All the CeO<jats:sub>2</jats:sub>–TiO<jats:sub>2</jats:sub> composites exhibit enhanced photocatalytic degradation of methyl orange under visible light irradiation compared to mere CeO<jats:sub>2</jats:sub> or TiO<jats:sub>2</jats:sub> nanoparticles. The synergistic effect of these three structures leads to a competition between size effects and interface interactions, which affects the band alignment, the number of defects, and, consequently, the PC activity. The highest PC reaction rate constant under visible light reaches up to 0.017 min<jats:sup>−1</jats:sup> and is achieved when the CeO<jats:sub>2</jats:sub> nanoparticle size is smaller than its Debye length.","PeriodicalId":7294,"journal":{"name":"Advanced Sustainable Systems","volume":null,"pages":null},"PeriodicalIF":7.1,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142191548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Recent advancements in negative electrode materials for supercapacitors have garnered significant attention due to their potential to enhance energy density. These materials are crucial in improving the performance of supercapacitors, particularly in terms of specific capacitance. Fe oxide‐based composites are attractive negative electrode materials for cutting‐edge supercapacitor technologies because of their high specific capacitance, broad potential window, outstanding cycle stability and adaptability in asymmetric design. The synthesized Fe─Ni oxide/reduced graphene oxide (FNG) composite delivered ≈500 F g−1 specific capacitance at ≈2 A g−1 current density. The work also describes the hydrothermal synthesis of a bimetallic oxide like zinc oxide‐manganese oxide (ZMO) as a positive material to fabricate asymmetric supercapacitor (ASC). The electrochemical results achieved from the three‐electrode configuration of ZMO indicate true pseudocapacitive behavior with the triangular charge–discharge curve. The fabricated ASC with ZMO as cathode and FNG as anode delivered energy, and power densities are ≈32 W h kg−1 and ≈2.3 kW kg−1, respectively.
超级电容器负极材料具有提高能量密度的潜力，因此其最新进展备受关注。这些材料对于提高超级电容器的性能至关重要，尤其是在比电容方面。基于氧化铁的复合材料具有高比电容、宽电位窗口、出色的循环稳定性和非对称设计的适应性，因此是尖端超级电容器技术中极具吸引力的负极材料。合成的铁─镍氧化物/还原氧化石墨烯（FNG）复合材料在电流密度≈2 A g-1时的比电容≈500 F g-1。该研究还介绍了水热合成双金属氧化物（如氧化锌-氧化锰（ZMO））作为正极材料来制造不对称超级电容器（ASC）的方法。ZMO 的三电极配置所产生的电化学结果表明，其具有三角形充放电曲线的真实伪电容行为。以 ZMO 为阴极、FNG 为阳极制造的 ASC 所提供的能量和功率密度分别为 ≈32 W h kg-1 和 ≈2.3 kW kg-1。
{"title":"Asymmetric Aqueous Supercapacitor Based on Zinc Oxide‐Manganese Oxide Cathode Material and Fe─Ni Oxide/Reduced Graphene Oxide Anode Material","authors":"Aparna Paul, Shraban Dey, Gopal Sebak Goswami, Anjan Chakraborty, Naresh Chandra Murmu, Tapas Kuila","doi":"10.1002/adsu.202400329","DOIUrl":"https://doi.org/10.1002/adsu.202400329","url":null,"abstract":"Recent advancements in negative electrode materials for supercapacitors have garnered significant attention due to their potential to enhance energy density. These materials are crucial in improving the performance of supercapacitors, particularly in terms of specific capacitance. Fe oxide‐based composites are attractive negative electrode materials for cutting‐edge supercapacitor technologies because of their high specific capacitance, broad potential window, outstanding cycle stability and adaptability in asymmetric design. The synthesized Fe─Ni oxide/reduced graphene oxide (FNG) composite delivered ≈500 F g<jats:sup>−1</jats:sup> specific capacitance at ≈2 A g<jats:sup>−1</jats:sup> current density. The work also describes the hydrothermal synthesis of a bimetallic oxide like zinc oxide‐manganese oxide (ZMO) as a positive material to fabricate asymmetric supercapacitor (ASC). The electrochemical results achieved from the three‐electrode configuration of ZMO indicate true pseudocapacitive behavior with the triangular charge–discharge curve. The fabricated ASC with ZMO as cathode and FNG as anode delivered energy, and power densities are ≈32 W h kg<jats:sup>−1</jats:sup> and ≈2.3 kW kg<jats:sup>−1</jats:sup>, respectively.","PeriodicalId":7294,"journal":{"name":"Advanced Sustainable Systems","volume":null,"pages":null},"PeriodicalIF":7.1,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142191542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The transition from fossil fuels to renewable energy sources is imperative to mitigate climate change and achieve sustainable development goals (SGDs). Hydrogen, as a clean energy carrier, holds great potential for decarbonizing various sectors, yet its production remains predominantly reliant on fossil fuels. This study explores a novel approach to sustainable hydrogen production by integrating offshore wind energy with reverse osmosis (RO) desalination technology. The proposed configuration harnesses offshore wind power to energize both a RO desalination system and water electrolysis unit. Initially, the wind energy powers the RO desalination process, purifying seawater, and then desalinated water is directed to water electrolysis system for generating green hydrogen directly from seawater. The resulting renewable hydrogen holds potential for diverse applications, including marine industries, and can be transported onshore as needed. The RO system is configured to treat 20 kg s−1 of seawater with a salinity of 35 000 ppm, aiming for a high recovery ratio and reduced freshwater salinity. A pressure exchanger (PX) is integrated to recover energy from high‐pressure brine stream and transfer it to the low‐pressure feed water, thus reducing the overall energy consumption of the RO process. The concentrated brine extracted from RO desalination is proposed to be utilized for the production of sodium hydroxide that can further pretreat incoming seawater and enhance the effectiveness of the filtration process by mitigating membrane fouling. This pressure exchanger increases the energy efficiency of the RO system from 63.1% to 64.0% and exergetic efficiency from 13.9% to 18.2% increasing the overall first and second law efficiencies to 37.9% and 33.5%. By leveraging offshore wind power to drive RO desalination systems, this research not only addresses freshwater scarcity but also facilitates green hydrogen generation, contributing to the advancement of renewable energy solutions and fostering environmental sustainability.
{"title":"Addressing Freshwater Scarcity and Hydrogen Production: Offshore Wind and Reverse Osmosis Synergies","authors":"Haris Ishaq, Curran Crawford","doi":"10.1002/adsu.202400390","DOIUrl":"https://doi.org/10.1002/adsu.202400390","url":null,"abstract":"The transition from fossil fuels to renewable energy sources is imperative to mitigate climate change and achieve sustainable development goals (SGDs). Hydrogen, as a clean energy carrier, holds great potential for decarbonizing various sectors, yet its production remains predominantly reliant on fossil fuels. This study explores a novel approach to sustainable hydrogen production by integrating offshore wind energy with reverse osmosis (RO) desalination technology. The proposed configuration harnesses offshore wind power to energize both a RO desalination system and water electrolysis unit. Initially, the wind energy powers the RO desalination process, purifying seawater, and then desalinated water is directed to water electrolysis system for generating green hydrogen directly from seawater. The resulting renewable hydrogen holds potential for diverse applications, including marine industries, and can be transported onshore as needed. The RO system is configured to treat 20 kg s<jats:sup>−1</jats:sup> of seawater with a salinity of 35 000 ppm, aiming for a high recovery ratio and reduced freshwater salinity. A pressure exchanger (PX) is integrated to recover energy from high‐pressure brine stream and transfer it to the low‐pressure feed water, thus reducing the overall energy consumption of the RO process. The concentrated brine extracted from RO desalination is proposed to be utilized for the production of sodium hydroxide that can further pretreat incoming seawater and enhance the effectiveness of the filtration process by mitigating membrane fouling. This pressure exchanger increases the energy efficiency of the RO system from 63.1% to 64.0% and exergetic efficiency from 13.9% to 18.2% increasing the overall first and second law efficiencies to 37.9% and 33.5%. By leveraging offshore wind power to drive RO desalination systems, this research not only addresses freshwater scarcity but also facilitates green hydrogen generation, contributing to the advancement of renewable energy solutions and fostering environmental sustainability.","PeriodicalId":7294,"journal":{"name":"Advanced Sustainable Systems","volume":null,"pages":null},"PeriodicalIF":7.1,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142191543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Strategies to control the size, shape, and lattice arrangement, introduce doping agents, and induce heterostructuring in electrocatalysts are strongly desirable to tailor their activities. Herewith, a one‐pot strategy utilizing polyacryloyl hydrazide (PAHz) as the composition directing agent and metallic Ni surface as the shape directing agent is employed to grow Co3O4 doped NiCu alloy nanocuboids on Ni foam (NF) under hydrothermal conditions for electrocatalytic H2 production. The resulting bi‐functional electrodes are suitable for methanol oxidation reaction (MOR) coupled green H2 production with effective energy efficiency. The low overall potential (MOR+HER) of 1.78 V to realize the current density (j) value of 100 mA cm−2 and extended durability (100 h@10 mA cm−2) along with the selective conversion of methanol to formate support the viability of the NF‐PAHz‐Co3O4@NiCu for the said operation. The electrode also displays efficacy toward oxygen evolution reaction (OER) activity and jOER value of 100 mA cm−2 is realized at a potential value of 1.65 VRHE with adequate durability. Overall, the synthetic strategy is general, scalable and may be extended to grow other metal oxide doped alloy nanostructures in the future.
控制电催化剂的尺寸、形状和晶格排列，引入掺杂剂以及诱导异质结构，这些都是定制电催化剂活性的理想策略。在此，利用聚丙烯酰肼（PAHz）作为成分引导剂和金属镍表面作为形状引导剂的一锅策略，在水热条件下在镍泡沫（NF）上生长出掺杂 Co3O4 的镍铜合金纳米立方体，用于电催化制取 H2。所制备的双功能电极适用于甲醇氧化反应（MOR）耦合绿色 H2 生产，能效高。1.78 V 的低总电位（MOR+HER）可实现 100 mA cm-2 的电流密度 (j)值和更长的耐久性（100 h@10 mA cm-2），以及甲醇到甲酸盐的选择性转化，都证明了 NF-PAHz-Co3O4@NiCu 在上述操作中的可行性。该电极还显示出氧进化反应（OER）活性，在 1.65 VRHE 的电位值下，jOER 值达到 100 mA cm-2，并具有足够的耐久性。总之，该合成策略具有通用性和可扩展性，未来可扩展到其他掺杂金属氧化物的合金纳米结构的生长。
{"title":"Ni Surface & Polyacryloyl Hydrazide Mediated Growth of Co3O4@NiCu Alloy Nanocuboids for Effective Methanol Oxidation and Oxygen Evolution Reactions","authors":"Santosh Semwal, Aiswarya Samal, Saroj Kumar Nayak, Rajashri R. Urkude, Akhoury Sudhir Kumar Sinha, Umaprasana Ojha","doi":"10.1002/adsu.202400372","DOIUrl":"https://doi.org/10.1002/adsu.202400372","url":null,"abstract":"Strategies to control the size, shape, and lattice arrangement, introduce doping agents, and induce heterostructuring in electrocatalysts are strongly desirable to tailor their activities. Herewith, a one‐pot strategy utilizing polyacryloyl hydrazide (PAHz) as the composition directing agent and metallic Ni surface as the shape directing agent is employed to grow Co<jats:sub>3</jats:sub>O<jats:sub>4</jats:sub> doped NiCu alloy nanocuboids on Ni foam (NF) under hydrothermal conditions for electrocatalytic H<jats:sub>2</jats:sub> production. The resulting bi‐functional electrodes are suitable for methanol oxidation reaction (MOR) coupled green H<jats:sub>2</jats:sub> production with effective energy efficiency. The low overall potential (MOR+HER) of 1.78 V to realize the current density (<jats:italic>j</jats:italic>) value of 100 mA cm<jats:sup>−2</jats:sup> and extended durability (100 h@10 mA cm<jats:sup>−2</jats:sup>) along with the selective conversion of methanol to formate support the viability of the NF‐PAHz‐Co<jats:sub>3</jats:sub>O<jats:sub>4</jats:sub>@NiCu for the said operation. The electrode also displays efficacy toward oxygen evolution reaction (OER) activity and <jats:italic>j</jats:italic><jats:sub>OER</jats:sub> value of 100 mA cm<jats:sup>−2</jats:sup> is realized at a potential value of 1.65 V<jats:sub>RHE</jats:sub> with adequate durability. Overall, the synthetic strategy is general, scalable and may be extended to grow other metal oxide doped alloy nanostructures in the future.","PeriodicalId":7294,"journal":{"name":"Advanced Sustainable Systems","volume":null,"pages":null},"PeriodicalIF":7.1,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142191538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this study, low‐grade water as an alternative to pure water for generating green hydrogen is studied using non‐precious hafnium nickel diselenide/reduced graphene oxide (HfNiSe2/rGO) electrocatalyst. The model electrocatalyst has performed well for hydrogen and oxygen generation. To attain 10 mA cm−2 of current density, it requires only 1.56, 1.58, and 1.61 V for deionized water (DI), tertiary effluent (TE), and raw wastewater (RWW), respectively, with high durability. In addition to generating green energy, pollutants are successfully removed during electrolysis. The synthesized hafnium‐based electrocatalyst is active toward urea electrolysis, requiring only 1.46 V for 10 mA cm−2 with high stability. Replacing high‐purity water with low‐grade water opens a new opportunity window for establishing a sustainable hydrogen economy and water management strategies.
本研究使用非贵金属二硒化铪/还原氧化石墨烯（HfNiSe2/rGO）电催化剂，研究了低品位水作为纯水的替代品来生成绿色氢气的问题。该模型电催化剂在制氢和制氧方面表现良好。在去离子水（DI）、三级出水（TE）和原废水（RWW）中，要达到 10 mA cm-2 的电流密度，分别只需要 1.56、1.58 和 1.61 V 的电压，且具有很高的耐用性。除了产生绿色能源外，污染物在电解过程中也被成功去除。合成的铪基电催化剂对尿素电解具有活性，10 mA cm-2 的电压仅需 1.46 V，且稳定性高。用低品位水替代高纯水为建立可持续的氢经济和水管理战略打开了一扇新的机遇之窗。
{"title":"Low‐Grade Water as a Promising Candidate for Green Hydrogen Generation","authors":"Deepak Chauhan, Mahesh Itagi, Young‐Ho Ahn","doi":"10.1002/adsu.202400336","DOIUrl":"https://doi.org/10.1002/adsu.202400336","url":null,"abstract":"In this study, low‐grade water as an alternative to pure water for generating green hydrogen is studied using non‐precious hafnium nickel diselenide/reduced graphene oxide (HfNiSe<jats:sub>2</jats:sub>/rGO) electrocatalyst. The model electrocatalyst has performed well for hydrogen and oxygen generation. To attain 10 mA cm<jats:sup>−2</jats:sup> of current density, it requires only 1.56, 1.58, and 1.61 V for deionized water (DI), tertiary effluent (TE), and raw wastewater (RWW), respectively, with high durability. In addition to generating green energy, pollutants are successfully removed during electrolysis. The synthesized hafnium‐based electrocatalyst is active toward urea electrolysis, requiring only 1.46 V for 10 mA cm<jats:sup>−2</jats:sup> with high stability. Replacing high‐purity water with low‐grade water opens a new opportunity window for establishing a sustainable hydrogen economy and water management strategies.","PeriodicalId":7294,"journal":{"name":"Advanced Sustainable Systems","volume":null,"pages":null},"PeriodicalIF":7.1,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142191541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Manganese oxide (α‐MnO2) with 1D tunneled cathode material is an attractive option for zinc ion batteries (ZIBs) as it offers high energy efficiency, cost‐effectiveness, natural abundance, safety, and environmental friendliness. However, it possesses inferior conductivity, which compromises its electrochemical performance in practical applications. To address this challenge, the integration of reduced graphene oxide is explored, renowned for its excellent conductivity, with α‐MnO2. This integration enhances the stability and conductivity of the composite structure. The reduction of graphene oxide is achieved through a hydrothermal method, facilitating the wrapping of reduced graphene oxide around α‐MnO2 nanorods. This synthesis approach not only saves energy but also aligns with the intended green approach. In this study, the impact of varying the hydrothermal reaction time on the properties of hydrothermally wrapped reduced graphene oxide on 1D α‐MnO2 (HWGOM) is investigated as a cathode material for ZIBs. A series of samples are prepared with hydrothermal reaction times of 4, 6, and 8 h, respectively. Specifically, HWGOM_6 demonstrates a highest specific capacity of 333 mAh g−1 at the current density of 200 mA g−1, along with remarkable cycling stability, retaining 94.3% of its capacity and achieving a coulombic efficiency of 97% over 500 cycles at a constant current density of 500 mA g−1.
具有一维隧道阴极材料的氧化锰（α-MnO2）是锌离子电池（ZIBs）的一个有吸引力的选择，因为它具有高能效、成本效益高、天然丰富、安全和环保等特点。然而，它的导电性较差，在实际应用中影响了其电化学性能。为了应对这一挑战，我们探索了将还原氧化石墨烯与 α-MnO2 相结合的方法。这种整合增强了复合结构的稳定性和导电性。氧化石墨烯的还原是通过水热法实现的，从而促进了还原氧化石墨烯对α-MnO2 纳米棒的包裹。这种合成方法不仅节约能源，而且符合绿色环保的理念。在本研究中，研究了改变水热反应时间对作为 ZIB 阴极材料的一维 α-MnO2（HWGOM）上水热包裹还原氧化石墨烯特性的影响。制备了一系列样品，水热反应时间分别为 4、6 和 8 小时。具体而言，HWGOM_6 在电流密度为 200 mA g-1 时的比容量最高，达到 333 mAh g-1，同时具有显著的循环稳定性，在电流密度为 500 mA g-1 的恒定电流下循环 500 次后，其容量保持率为 94.3%，库仑效率达到 97%。
{"title":"Sustainable Hydrothermal Synthesis of Reduced Graphene Oxide Wrapped on α‐MnO2 Nanorod Cathode for Zinc‐Ion Batteries","authors":"Sayli Pradhan, Dinesh J. Ahirrao, Neetu Jha","doi":"10.1002/adsu.202400362","DOIUrl":"https://doi.org/10.1002/adsu.202400362","url":null,"abstract":"Manganese oxide (α‐MnO<jats:sub>2</jats:sub>) with 1D tunneled cathode material is an attractive option for zinc ion batteries (ZIBs) as it offers high energy efficiency, cost‐effectiveness, natural abundance, safety, and environmental friendliness. However, it possesses inferior conductivity, which compromises its electrochemical performance in practical applications. To address this challenge, the integration of reduced graphene oxide is explored, renowned for its excellent conductivity, with α‐MnO<jats:sub>2</jats:sub>. This integration enhances the stability and conductivity of the composite structure. The reduction of graphene oxide is achieved through a hydrothermal method, facilitating the wrapping of reduced graphene oxide around α‐MnO<jats:sub>2</jats:sub> nanorods. This synthesis approach not only saves energy but also aligns with the intended green approach. In this study, the impact of varying the hydrothermal reaction time on the properties of hydrothermally wrapped reduced graphene oxide on 1D α‐MnO<jats:sub>2</jats:sub> (HWGOM) is investigated as a cathode material for ZIBs. A series of samples are prepared with hydrothermal reaction times of 4, 6, and 8 h, respectively. Specifically, HWGOM_6 demonstrates a highest specific capacity of 333 mAh g<jats:sup>−1</jats:sup> at the current density of 200 mA g<jats:sup>−1</jats:sup>, along with remarkable cycling stability, retaining 94.3% of its capacity and achieving a coulombic efficiency of 97% over 500 cycles at a constant current density of 500 mA g<jats:sup>−1</jats:sup>.","PeriodicalId":7294,"journal":{"name":"Advanced Sustainable Systems","volume":null,"pages":null},"PeriodicalIF":7.1,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142191549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Meysam Tayebi, Zohreh Masoumi, Hyungwoo Lee, Daehyeon Hong, Bongkuk Seo, Choong‐Sun Lim, Daeseung Kyung, Hyeon‐Gook Kim
The glucose oxidation reaction (GOR) is a potential alternative to water oxidation because of its relatively low thermodynamic potential and the high availability of glucose. Herein, a FeCoO/N‐doped C electrode derived from metal–organic framework (MOF) materials is applied, which is synthesized in several steps through the controlled deposition of Fe–Co oxide nanocatalysts onto Co –N‐doped C nanofibers on a Ni foam substrate and demonstrate exceptional electrocatalytic activity for both the GOR and overall water splitting. Here, a bifunctional electrocatalyst derived from MOF, FeCoO/N‐doped C is reported, for glucose oxidation reaction (GOR) and hydrogen evolution reaction (HER). The MOF‐derived FeCoO/N‐doped C (+/‐) as a bifunctional electrocatalyst exhibits a cell voltage of 1.4 V for the GOR&HER, to reach a current density of 10 mA cm−2, which is 280 mV lower than that for the oxygen evolution reaction (OER)&HER (1.68 V). This study reveals that GOR is an energy‐efficient and affordable source of H2 and value‐added chemicals.
葡萄糖氧化反应（GOR）是水氧化反应的一种潜在替代方法，因为它的热力学潜力相对较低，而且葡萄糖的可用性很高。本文应用了一种源自金属有机框架（MOF）材料的 FeCoO/N 掺杂 C 电极，该电极是通过在镍泡沫基底上的 Co -N 掺杂 C 纳米纤维上可控沉积 Fe-Co 氧化物纳米催化剂，分几步合成的。本文报告了一种源自 MOF、FeCoO/N-掺杂 C 的双功能电催化剂，用于葡萄糖氧化反应（GOR）和氢进化反应（HER）。由 MOF 衍生的 FeCoO/N-掺杂 C (+/-) 作为双功能电催化剂，在葡萄糖氧化反应 &HER 中的电池电压为 1.4 V，电流密度为 10 mA cm-2，比氧进化反应 (OER)&HER 的电池电压（1.68 V）低 280 mV。这项研究表明，GOR 是一种高效节能且经济实惠的 H2 和增值化学品来源。
{"title":"MOF‐Derived FeCoO/N‐Doped C Bifunctional Electrode for H2 Production Through Water and Glucose Electrolysis","authors":"Meysam Tayebi, Zohreh Masoumi, Hyungwoo Lee, Daehyeon Hong, Bongkuk Seo, Choong‐Sun Lim, Daeseung Kyung, Hyeon‐Gook Kim","doi":"10.1002/adsu.202400342","DOIUrl":"https://doi.org/10.1002/adsu.202400342","url":null,"abstract":"The glucose oxidation reaction (GOR) is a potential alternative to water oxidation because of its relatively low thermodynamic potential and the high availability of glucose. Herein, a FeCoO/N‐doped C electrode derived from metal–organic framework (MOF) materials is applied, which is synthesized in several steps through the controlled deposition of Fe–Co oxide nanocatalysts onto Co –N‐doped C nanofibers on a Ni foam substrate and demonstrate exceptional electrocatalytic activity for both the GOR and overall water splitting. Here, a bifunctional electrocatalyst derived from MOF, FeCoO/N‐doped C is reported, for glucose oxidation reaction (GOR) and hydrogen evolution reaction (HER). The MOF‐derived FeCoO/N‐doped C (+/‐) as a bifunctional electrocatalyst exhibits a cell voltage of 1.4 V for the GOR&HER, to reach a current density of 10 mA cm<jats:sup>−2</jats:sup>, which is 280 mV lower than that for the oxygen evolution reaction (OER)&HER (1.68 V). This study reveals that GOR is an energy‐efficient and affordable source of H<jats:sub>2</jats:sub> and value‐added chemicals.","PeriodicalId":7294,"journal":{"name":"Advanced Sustainable Systems","volume":null,"pages":null},"PeriodicalIF":7.1,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142191551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Alternative technologies to granular activated carbon (GAC) are of interest to improve the sustainability and reduce the cost of munitions wastewater treatment. Research efforts have highlighted GAC alternatives, yet few reports of environmental and economic impacts associated with these technologies are available. Herein, a life cycle assessment (LCA) aids in assessment of environmental impacts associated with six munitions wastewater treatment configurations—specifically GAC, compared to five configurations that include combinations of ion exchange (IX), reverse osmosis (RO), aerobic granular reactors (AGR), UV/H2O2, and ozone technologies. The LCA compares environmental impacts generated by treating 1 m3 of munitions wastewater, impacts by life cycle stage, and effects of IX, RO, and GAC replacement frequency. Results show that IX resin pairs with AGR (for flow‐through treatment) and ozone (for IX regenerant treatment) generated 22 ± 18% less impact than GAC in nine of ten environmental impact categories during production, transportation, and disposal. Treatment trains with ozone or AGR produce 35% less environmental impact than those with UV/H2O2. Production and use stages generate more environmental impacts than transportation and disposal stages for most treatment technologies. This LCA provides insights into the sustainability of six munition wastewater treatment technologies and identifies areas where treatment sustainability can be improved.
{"title":"Life Cycle Assessment of Industrial Wastewater Treatment Trains","authors":"Dana Tran, Jennifer Weidhaas","doi":"10.1002/adsu.202400246","DOIUrl":"https://doi.org/10.1002/adsu.202400246","url":null,"abstract":"Alternative technologies to granular activated carbon (GAC) are of interest to improve the sustainability and reduce the cost of munitions wastewater treatment. Research efforts have highlighted GAC alternatives, yet few reports of environmental and economic impacts associated with these technologies are available. Herein, a life cycle assessment (LCA) aids in assessment of environmental impacts associated with six munitions wastewater treatment configurations—specifically GAC, compared to five configurations that include combinations of ion exchange (IX), reverse osmosis (RO), aerobic granular reactors (AGR), UV/H<jats:sub>2</jats:sub>O<jats:sub>2</jats:sub>, and ozone technologies. The LCA compares environmental impacts generated by treating 1 m<jats:sup>3</jats:sup> of munitions wastewater, impacts by life cycle stage, and effects of IX, RO, and GAC replacement frequency. Results show that IX resin pairs with AGR (for flow‐through treatment) and ozone (for IX regenerant treatment) generated 22 ± 18% less impact than GAC in nine of ten environmental impact categories during production, transportation, and disposal. Treatment trains with ozone or AGR produce 35% less environmental impact than those with UV/H<jats:sub>2</jats:sub>O<jats:sub>2</jats:sub>. Production and use stages generate more environmental impacts than transportation and disposal stages for most treatment technologies. This LCA provides insights into the sustainability of six munition wastewater treatment technologies and identifies areas where treatment sustainability can be improved.","PeriodicalId":7294,"journal":{"name":"Advanced Sustainable Systems","volume":null,"pages":null},"PeriodicalIF":7.1,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142191550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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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