InfoMat
·
2025
·
IF 22.3
Yalei Fan,Shengjie Zhang,Xubin Ye,Jing Zhou,Qingyu Kong,Jihao Zhang,Youwen Long,Jian-Qiang Wang,Zhiwei Hu,Linjuan Zhang
Hydrogen production via water electrolysis offers a sustainable pathway to decarbonize energy systems, yet the development of cost-effective, efficient bifunctional electrocatalysts for overall water splitting (OWS) still remains a critical challenge. Current catalysts often rely on complex multiphase heterostructures to optimize oxygen and hydrogen evolution reactions (OER/HER), but their intricate designs increase costs and hinder scalability. Here, we present a single-phase bifunctional electrocatalyst, CaCu 3 Co 2 Ru 2 O 12 (CCCRO), which exhibited exceptional performance for OWS in alkaline conditions, specifically, 1.536 V at 10 mA cm −2 and 1.629 V at 100 mA cm −2 , along with 500 h of operational stability at a current density of 100 mA cm −2 . In situ x-ray absorption spectroscopy (XAS) revealed the valence-state transition from Cu 2+ /Co 3+ /Ru 5+ to Cu 2+ /Co 3.5+ /Ru 5.5+ during OER, but both valence state reduction and structural reconstruction into a CuCoRu nanoalloy occurred under HER conditions. Density functional theory (DFT) calculations indicated that synergistic effects among Cu, Co, and Ru ions enhance catalytic activities for both OER and HER. This work demonstrates that structurally simple yet compositionally tuned oxides can surpass complex catalysts in both the efficiency and durability of OWS, offering a scalable design paradigm for advancing green hydrogen technologies.
研究领域:
能量转换
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电化学
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材料科学
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催化
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yujia Nie,Jingxiong Liu,Youdong Chen,Han Chen,Wei Zhou
Direct ammonia proton ceramic fuel cells (DA-PCFCs) have garnered significant attention in the clean energy sector as a promising technology for achieving carbon-free and efficient energy conversion. The cathode material, as a key component of this system, possesses intrinsic properties that significantly impact the overall performance of the DA-PCFCs. To address the characteristics of ammonia fuel systems, this study synthesized a novel cobalt-free double perovskite cathode material, PrBaFe 2 O 6-δ (PBF), via the sol-gel method. Systematic characterization revealed that PBF not only exhibited a stable cubic perovskite structure, but also synergistically enhanced the oxygen reduction reaction through the combination of mixed Fe ion valence states and abundant surface oxygen vacancies. Furthermore, the thermal expansion coefficient of PBF exhibited better compatibility with the electrolyte than cobalt-containing cathodes. These properties provided a robust foundation for the favorable performance of DA-PCFCs. Electrochemical tests demonstrated that the cell with the PBF cathode achieved a peak power density of 379 mW·cm −2 at 700 °C, with a 67.4 % power retention rate under H 2 fuel conditions. Notably, the performance degradation rate of the cell was only 0.06 % h −1 after 100 h of constant current discharge, indicating excellent operational stability. This study presented an effective strategy to the development of cathodes for DA-PCFCs.
研究领域:
能源材料
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燃料电池
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电化学
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材料科学
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清洁能源技术
✓ 已验证
产品关联
DOI
高影响因子
Nature Synthesis
·
2025
·
IF 20
Shi Siyi,Gong Chenxiang,Tao Minqin,Wang Cong,Fan Baojin,Yuan Hao,Hu Huawei,Niazi Muhammad Bilal Khan,Yan Xuzhou,Hu Xiaotian,Chen Yiwang
Flexible perovskite solar cells achieve efficient bendable energy conversion, enabling next-generation wearable devices. However, the transition from laboratory-scale prototypes to industrial-scale modules is impeded by the non-uniform deposition of perovskite colloidal particles during printing, resulting in diminished power conversion efficiency. Inspired by biological interlocking mechanisms, we synthesized mechanically interlocked networks embedded in perovskite precursor inks, to construct a three-dimensional network that immobilizes perovskite colloidal particles, suppressing aggregation during printing. The dynamic network enables uniform co-deposition of perovskite colloidal particles under shear-induced flow, yielding high-quality crystalline films with enhanced optoelectronic properties. Flexible perovskite solar cells fabricated using mechanically interlocked network-doped precursor ink exhibit superior performance, achieving record power conversion efficiencies of 26.22% for small devices (0.10 cm 2 ) and 19.44% for larger modules (100 cm 2 ), alongside substantial improvements in long-term operational stability and mechanical robustness.
研究领域:
材料科学
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纳米科技
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能源材料
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柔性电子学
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光电器件
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高分子化学
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薄膜制备
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yuyang Li,Hui Liu,Li Ding,Liqi Li,Lixiang Wang,Deren Yang,Yanjun Fang
Perovskite nanocrystals (PNCs) offer unique advantages in large-area and thick-film deposition for X-ray detection applications due to the decoupling of the crystallization of perovskite from film formation, as well as their low-temperature and scalable deposition methods. However, the partial detachment of long-chain ligands in PNCs during the purification process would lead to the exposure of surface defects, making it challenging to ensure efficient charge carrier extraction and stable X-ray detection. In this study, we propose a beneficial strategy that involves the in situ reparation of these exposed defects with sodium bromide (NaBr) during the purification process to construct CsPbBr3 PNC-organic bulk heterostructure X-ray detectors. The NaBr-passivated PNCs exhibit stronger photoluminescence intensity and lower trap density in films compared to those of the control samples, confirming the effective passivation of halide vacancy defects. Furthermore, the NiOx hole transport layer with remarkable electron blocking capability is introduced to further suppress the dark current of the devices. Consequently, the optimal devices exhibit a large sensitivity of 4237 μC Gyair–1 cm–2 and a low dark current density of 10 nA cm–2, as well as improved operational stability, which allows for high-contrast and low-dose X-ray imaging applications.
研究领域:
材料科学
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纳米技术
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放射学
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光电技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 46
·16682-16692
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IF 7.393
Xiao-Yi Cai,Yi Yu,Yong-Chun Ye,Yang Shen,Ming-Lei Guo,Jing-Kun Wang,Kong-Chao Shen,Yan-Qing Li,Jian-Xin Tang
Metal halide perovskite light-emitting diodes (PeLEDs) have been recognized as emerging candidates for next-generation solution-processed electronic display technology, and great progress has been made in recent years. However, their poor operational stability is yet to be solved. Here, we present a reformative all-inorganic red-emission PeLED based on the passivation effect caused by the incorporation of zinc ions into perovskites for enhancing the efficiency and operational stability. A high-quality quasi-two-dimensional perovskite CsPbI3−xBrx thin film with good crystallinity is obtained, benefiting from the combination of large organic ammonium ions (PEA+ ions) and inorganic salt zinc iodide (ZnI2). As a result, ZnI2-passivated CsPbI3−xBrx PeLEDs emitting at 666 nm show a maximum external quantum efficiency of 9.93% and a maximum brightness of 4258 cd m−2. More importantly, the PeLEDs achieve a long half-lifetime of about 2667 h at an initial luminance of 100 cd m−2. This work provides a facile method to obtain stable and efficient red-emission PeLEDs.
研究领域:
材料科学
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光电子学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 26
·2011003
·
IF 18.808
Boning Han,Shichen Yuan,Bo Cai,Jizhong Song,Wenqiang Liu,Fengjuan Zhang,Tao Fang,Changting Wei,Haibo Zeng
According to the thinner emitting layer and stronger electric field in perovskite light-emitting diodes (PeLEDs) than those in perovskite solar cells, the strong electric-field-driven ion-migration is a key issue for the operational stability of PeLEDs. Here, a methylene-bis-acrylamide cross-linking strategy is proposed to both passivate defects and suppress ion-migration with an emphasis on the suppressing mechanism via in situ investigations. As typical results, in addition to the enhanced external quantum efficiency (EQE, 16.8%), PeLEDs exhibit preferable operational stability with a half lifetime ( T 50 ) of 208 h under continuous operation with an initial luminance of 100 cd m −2 . Moreover, the EQE of cross-linked LEDs can maintain above 15% during 25 times scanning as the devices are measured every 4 days. To the authors’ knowledge, this is the highest stability published until now for high-efficiency PeLEDs with EQE over 15%. The in situ/ex situ mechanism investigation demonstrates that such cross-linking increases binding energy from 0.54 to 0.92 eV and activation energy from 0.21 to 0.5 eV. Hence, it suppresses ligands breaking away and ion migration, which prevents ions from moving inside and across crystals. The proposed cross-linking passivation strategy thus provides an effective methodology to fabricate stable perovskites-based photoelectric devices.
研究领域:
材料科学
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光子学
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光电学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2018
·Vol. 9
·期 1
·1-10
·
IF 12.353
Li Xiaodong,Zhang Wenxiao,Wang Ying-Chiao,Zhang Wenjun,Wang Hai-Qiao,Fang Junfeng
Long-term operational stability is the foremost issue delaying the commercialization of perovskite solar cells (PSCs). Here we demonstrate an in-situ cross-linking strategy for operationally stable inverted MAPbI 3 PSCs through the incorporation of a cross-linkable organic small molecule additive trimethylolpropane triacrylate (TMTA) into perovskite films. TMTA can chemically anchor to grain boundaries and then in-situ cross-link to a robust continuous network polymer after thermal treatment, thus enhancing the thermal, water-resisting and light-resisting properties of organic/perovskite films. As a result, the cross-linked PSCs exhibit 590-fold improvement in operational stability, retaining nearly 80% of their initial efficiency after continuous power output for 400 h at maximum power point under full-sun AM 1.5 G illumination of Xenon lamp without any UV-filter. In addition, under moisture or thermal (85 °C) conditions, cross-linked TMTA-based PSCs also show excellent stability with over 90% of their initial or post burn-in efficiency after aging for over 1000 h.
研究领域:
材料科学
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光伏技术
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zhaoqian Zhang,Hongxia An,Qiaoxia Hu,Junping Miao,Genghao Gong,Yunxia Hu
Dopamine-assisted co-deposition is a promising approach for preparing nanofiltration (NF) membranes due to its simplicity, controllability, and versatility. However, limited research has been conducted on the functionalization and membrane formation mechanism of polydopamine (PDA) co-deposition membranes. In this study, lysozyme (Lys) was selected as one model protein and co-deposited with dopamine to prepare antibacterial NF membranes. The effects of the mass ratio of PDA/Lys and deposition time on the selective layer structure and membrane performance, and membrane-forming mechanism were systematically investigated. Results prove that addition of lysozyme into a dopamine solution promotes the rapid formation of a dense selective layer, and the maximum density of the PDA/Lys co-deposition layer reaches 1.53 g·cm −3 with the optimal 1:0.50 mass ratio of dopamine and lysozyme, and the resulting membranes have the effective pore size of 1.5 nm in diameter. The optimal PDA/Lys membranes can achieve high methyl blue (MB) rejection (98.2 %) and low salt rejection (13.1 % for NaCl) while maintaining high water permeance (42.4 L·m −2 ·h −1 ·bar −1 ) and demonstrating excellent long-term operational stability. Moreover, the NF membranes made from co-deposition of PDA and Lys exhibited outstanding antibacterial properties with 92 % bacterial-killing efficiency. Our work provides a simple method for utilizing functional proteins to prepare antibacterial NF membranes, and offers new insights into the membrane-forming mechanism of dopamine-assisted co-deposition membranes.
研究领域:
材料科学
·
纳米技术
·
膜技术
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生物技术
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2024
·
IF 27.4
Wenshu Yang,Kai Zhang,Wei Yuan,Lijun Zhang,Chuanjiang Qin,Haibo Wang
Ion migration poses a substantial challenge in perovskite transistors, exerting detrimental effects on hysteresis and operational stability. This study focuses on elucidating the influence of ion migration on the performance of tin-based perovskite field-effect transistors (FETs). It is revealed that the high background carrier density in FASnI 3 FETs arises not only from the oxidation of Sn 2+ but also from the migration of FA + ions. The formation of hydrogen bonding between FA + and F − ions efficiently inhibits ion migration, leading to a reduction in background carrier density and an improvement in the operational stability of the transistors. The strategy of hydrogen bond is extended to fluorine-substituted additives to improve device performance. The incorporation of 4-fluorophenethylammonium iodide additives into FETs significantly minimizes the shift of turn-on voltage during cyclic measurements. Notably, an effective mobility of up to 30 cm 2 V −1 s −1 with an I on/off ratio of 10 7 is achieved. These findings hold promising potential for advancing tin-based perovskite technology in the field of electronics.
研究领域:
材料科学
·
电子学
·
半导体器件
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2017
·
IF 6.035
Xuanxuan Cheng,Zhongyi Jiang,Xiaopo Cheng,Song Guo,Lei Tang,Hao Yang,Hong Wu,Fusheng Pan,Peng Zhang,Xingzhong Cao,Baoyi Wang
Although metal-organic frameworks (MOFs) with well-defined regular and porous structure have emerged as a family of nanoporous building blocks, the great potential of MOFs as multi-functional fillers for hybrid membranes deserves in-depth exploitation. In this study, bimetallic MOF nanocages, Fe III -HMOF-5, were prepared and incorporated into sodium alginate (SA) matrix to fabricate water-selective nanohybrid membranes. Introduction of Fe III ions into MOF-5 creates more coordinatively unsaturated sites, which leads to preferential dissolution of water molecules over ethanol molecules, thus elevating the solubility selectivity. The hollow structure of Fe III -HMOF-5 ensures the free diffusion of water molecules. The synergistic regulation of chemical composition and physical structure of MOFs endows the hybrid membranes with remarkably elevated separation factor and permeation flux. Taking dehydration of 90 wt% ethanol aqueous solution as model system, the hybrid membrane containing Fe III -HMOF-5 exhibits the highest separation performance with separation factor of 3423 and permeation flux of 1540 g/m 2 h, much higher than those for pure SA membrane and the hybrid membranes incorporating hollow MOF-5 (HMOF-5) and MOF-5. Moreover, the hybrid membranes containing Fe III -HMOF-5 display remarkably superior physicochemical stabilities and long-term operation stability. This study demonstrates a promising prospect of heterometallic hollow MOFs as multi-functional fillers in high-performance hybrid membranes.
研究领域:
材料科学
·
化学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Zhaohui Yin,Sisi He,Yuwei Li,Wenjing Dai,Hong Wang,Runhe He,Kui Tang,Yiming Xiao,Songbo Wang,Jian Gao,Lei Zhang,Jianxin Li,Na Tang,Zhen Yin
Self-supported carbon electrodes have been intensively explored in the fields of materials chemistry, energy storage, and conversion due to the unique features of carbon materials. Herein, we report a facile strategy to construct a freestanding carbon membrane (CM) electrode consisting of a microfiltration CM and two-dimensional (2D) ultrathin Co3O4 nanosheets (NSs), which is successfully applied as an efficient and binder-free carbon electrode in the electrochemical applications of enzyme-free glucose detection and supercapacitors. Owing to the inherent structural merits, including the three-dimensional (3D) interconnected porous network in the membrane, structural integrity, high conductivity, and the well-dispersed and in situ growth of 2D Co3O4 NSs, the obtained Co3O4 NSs/CM demonstrated superior electrochemical performances and excellent long-term operation stability. Our present work paves the path to fabricate low-cost and efficient carbon electrodes with a rational structure design for multifunctional materials.
研究领域:
材料化学
·
能源存储与转换
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2021
·Vol. 13
·期 21
·9634-9640
·
IF 7.79
Shuhua Chen,Qixuan Zhong,Jun Liu,Wenhao Guan,Pengli Li,Israr Mahmood,Muhan Cao,Qiao Zhang
All-inorganic lead halide perovskite nanocrystals (NCs) have been promising candidates in various optoelectrical fields. It is still challenging to further enhance their optical properties and stability to meet the requirements of practical applications. Herein, we develop a passivation strategy towards CsPbBr3 NCs by using inorganic phosphate and bromide anions. Phosphate can coordinate with lead ions on CsPbBr3 NCs as capping ligands; meanwhile, excess bromide can strengthen the repair of surface trapping sites. The treated NCs exhibit near-unity quantum yield and boosted radiative recombination. In addition, obvious enhancement has been realized in their durability against polar solvents. A white light emitting diode (WLED) has been fabricated by employing the passivated NCs as a green light source, which possesses high luminous efficiency and operational stability.
研究领域:
材料科学
·
光电技术
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）