INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Wenyue Jiang,Bingxin Zhao,Ziting Li,Peng Zhou,Xiaoshuang Chen,Jinping Wang,Rui Yang,Chunling Zuo
Research into cost-effective electrocatalysts for alkaline water and simulated seawater oxidation is paramount for advancing the conversion and storage of renewable energy. In this study, a FeSe 2 /Ni 0·85 Se catalyst with the hollow and ultrathin nanobelts structure is synthesized. The distinctive structure characteristics of FeSe 2 /Ni 0·85 Se heterojunction nanobelts confer exceptional oxygen evolution reaction (OER) properties in diverse electrolytes, including alkaline 1 M KOH and simulated seawater (1 M KOH + 0.5 M NaCl) solutions. The FeSe 2 /Ni 0·85 Se catalyst presents the low overpotentials of 259 and 267 mV at a current density of 10 mA cm −2 , along with the Tafel slopes of 33.7 and 65.5 mV dec −1 in two solutions, respectively. Additionally, the FeSe 2 /Ni 0·85 Se catalyst also demonstrates good stability. This exploration introduces a promising strategy for the development of high-performance electrocatalysts in the realm of green energy, marking the significant progress towards sustainable energy solutions.
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INORGANIC CHEMISTRY
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2025
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IF 4.7
Fei Lu,Bin Zhang,Lifeng Shen,Anjie Chen,Yuhe Chen,Yuxue Zhou,Xiuyun Zhang,Bitao Liu,Min Zhou
Replacing the sluggish anodic water oxidation reaction with the glucose oxidation reaction (GOR) offers an energy-saving strategy to obtain value-added products during the hydrogen production process. However, rational design of the GOR electrocatalyst with an explicit structure–property relationship remains a challenge. In this study, by using cobalt chalcogenides as model catalysts, we performed an in-depth study of the GOR catalytic mechanism of CoS and CoSe nanosheets. Experimental and theoretical results revealed that the reaction pathway on cobalt chalcogenides strongly depends on their binding energy to hydroxyl (OHBE). For CoS with a weak OHBE, the reaction proceeds through an “electrophilic oxygen” route. While for CoSe, due to the strong OHBE, a surface reconstruction occurs before the GOR and therefore follows the “electrochemical-chemical” route. Inspired by these findings, a customized strategy was proposed to regulate the OHBE of the catalysts, which involved introducing F atoms into CoS to enhance its OHBE, and weakening the OHBE of CoSe by doping with Zn atoms. The optimized F-doped CoS and Zn-doped CoSe catalysts both exhibited significantly improved performance for GOR. This study thus provides a verifiable paradigm for improving the GOR performance via a customized strategy and sheds light on the design of novel catalysts in the future.
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Journal of Materials Chemistry C
·
2025
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IF 5.1
Sijie Ge,Xuanzhi He,Qianli Zhang,Junjie Lin,Yuchang Zeng,Yudiao Lin,Conglong Lin,Yan Zhang,Xianzhong Lin
A binary solvent system of dimethyl sulfoxide (DMSO) and isopropanol (IPA) has been developed for preparing high-crystalline kesterite Cu2ZnSn(S,Se)4 (CZTSSe) films. The absorbers made with the single DMSO solvent exhibit a granular microstructure, which can be altered by adding IPA to the solvent. Addition of IPA not only elevates wettability of the solution, but also enhances its volatility, thus enabling the regulation of the formation of cracks in the precursor thin film. Appropriate cracks allow Se vapor to penetrate the precursor film which promotes the grain growth during the selenization process. Hence, the incorporation of IPA into the solvent impacts the crystallinity of the absorber. Large grains can be obtained when the volume ratio of DMSO to IPA is 4 : 1. Both the open-circuit voltage (VOC) and fill factor (FF) are dramatically improved by around 24% and 47%, respectively, with the addition of 20% IPA. As a result, the efficiency of the CZTSSe solar cell has increased from 3.33% to 7.18%.
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SOLAR ENERGY
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2024
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IF 6
Zhi-Ping Huang,Hui-Li,Wei-Ze Wang,Hu Li,Li-Mei Lin,Zhi-Gao Huang,Shui-Yuan Chen,Gui-Lin Chen
Sb 2 (S,Se) 3 is a promising photovoltaic material due to its tunable bandgap, high thermal stability, and low-cost production potential. However, films produced by close-spaced sublimation (CSS) often suffer from defects that reduce efficiency. In this work, lithium (Li) doping was introduced to improve crystal quality, carrier concentration, and conductivity. The lithium was incorporated into the sublimation source via molten salt treatment, resulting in a uniform Li-Sb 2 (S,Se) 3 thin film. The resulting ITO/CdS/Li-Sb 2 (S,Se) 3 /PbS/Carbon solar cell achieved a power conversion efficiency of 6.18%, a significant improvement over undoped devices. The study further investigates the optoelectronic properties, revealing that Li doping effectively reduces non-radiative recombination, improves carrier extraction, and increases the valence band maximum (VBM), optimizing energy level alignment for enhanced hole transport. Additionally, the improved surface conductivity and higher carrier concentration due to Li doping contributed to enhanced carrier transport and reduced recombination.This research demonstrates that alkali metal doping can enhance the optoelectronic properties of Sb 2 (S,Se) 3 films, providing a pathway for further efficiency improvements in antimony-based thin-film solar cells.
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Nature Communications
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2024
·Vol. 15
·期 1
·1-12
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IF 14.7
Lyu Wenyuan,Liu Yang,Chen Datong,Wang Fengliang,Li Yingwei
Photocatalytic conversion of CO 2 into syngas is highly appealing, yet still suffers from the undesirable product yield due to the sluggish carrier transfer and the uncontrollable affinity between catalytic sites and intermediates. Here we report the fabrication of Co sites with tunable electron localization capability on two dimensional (2D) nanosheets assembled three dimensional (3D) ordered macroporous framework (3DOM-NS). The as-prepared Co-based 3DOM-NS catalysts exhibit attractive photocatalytic performances toward CO 2 reduction, among which the cobalt sulfide one (3DOM Co-SNS) shows the highest syngas generation rate up to 347.3 μmol h −1 under the irradiation of visible light and delivers a remarkable catalytic activity (1150.7 μmol h −1 ) in a flow reaction system under natural sunlight. Mechanism studies reveal that the high electron localization of metal sites in 3DOM Co-SNS strengthens the interaction between Co and HCOO* via the orbital interactions of d yz / d xz - p and s - s , thus facilitating the cleaving process of C-O bond. Additionally, the ordered macroporous framework with nanosheet subunits elevates the transfer efficiency of photoexcited electrons, which contributes to its high activity.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Xunan Jing,Daomeng Liu,Ning Zhang,Xiaoping Zhao,Jiali Wang,Daquan Wang,Wenchen Ji,Junjun She,Lingjie Meng
Two-dimensional transition metal dichalcogenides (TMDCs) exhibit promising photothermal therapy (PTT) and chemodynamic therapy (CDT) for anti-tumour treatment. Herein, we proposed an engineering strategy to regulate the lattice structure of tungsten-doped molybdenum selenide (Mo x W 1−x Se 2 ) transformed conformational nanoarchitectonics using a microwave-assisted solvothermal method for enhancing peroxidase (POD)-like catalytic performance by adjusting the ratio of molybdenum (Mo) and tungsten (W). Furthermore, the optimised Mo 0.8 W 0.2 Se 2 nanoflakes surface was modified with chitosan (CHI) for improved biocompatibility and nanocatalytic efficacy, then the obtained CHI-Mo 0.8 W 0.2 Se 2 subsequently loaded the chemotherapeutic drug mitoxantrone (MTO) for enhanced 4 T1 cells killing ability, shortly denoted as CHI-Mo 0.8 W 0.2 Se 2 -MTO for PTT-augmented CDT and chemotherapy (CT). A series of performance validations successfully showed that electrons tend to transfer from W to Mo in CHI-Mo 0.8 W 0.2 Se 2 , which resulted in superior POD-like activity ( K m = 0.038 mM) of CHI-Mo 0.8 W 0.2 Se 2 compared with that of horseradish peroxidase. Furthermore, CHI-Mo 0.8 W 0.2 Se 2 -MTO with excellent photothermal conversion efficiency (PCE=63.2 %) in the near-infrared (NIR) region could further promote endogenous •OH generation and MTO controlled release within solid tumours. In vivo studies confirmed the successful achievement of synergistic therapeutic effects (tumour inhibition rate of over 90 %) with minimised side effects. Versatile therapeutic nanoagents hold great potential for personalised therapy of breast cancer and will find their way to the pharmaceutical field.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
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IF 9.4
Honghong Fan,Zhifang Yang,Zhiwen Cheng,Farzaneh Bahmani,Jingping Zhang,Xing-Long Wu
Metal selenides have emerged as promising Na-storage anode materials owing to their substantial theoretical capacity and high cost-effectiveness. However, the application of metal selenides is hindered by inferior electronic conductivity, huge volume variation, and sluggish kinetics of ionic migration. In response to these challenges, herein, a hierarchical hollow tube consisting of FeSe 2 nanosheets and Se quantum dots anchored within a carbon skeleton (HT-FeSe 2 /Se/C) is strategically engineered and synthesized. The most remarkable feature of HT-FeSe 2 /Se/C is the introduction of Se quantum dots, which could lead to high electron density near the Fermi level and significantly enhance the overall charge transfer capability of the electrode. Moreover, the distinctive hollow tubular structure enveloped by the carbon skeleton endows the HT-FeSe 2 /Se/C anode with robust structural stability and fast surface-controlled Na-storage kinetics. Consequently, the as-synthesized HT-FeSe 2 /Se/C demonstrates a reversible capacity of 253.5 mAh/g at a current density of 5 A/g and a high specific capacity of 343.9 mAh/g at 1 A/g after 100 cycles in sodium-ion batteries (SIBs). Furthermore, a full cell is assembled with HT-FeSe 2 /Se/C as the anode, and a vanadium-based cathode (Na 3 V 2 (PO 4 ) 2 O 2 F), showcasing a high specific capacity of 118.1 mAh/g at 2 A/g. The excellent performance of HT-FeSe 2 /Se/C may hint at future material design strategies and advance the development and application of SIBs.
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ELECTROCHIMICA ACTA
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2024
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IF 5.5
Xiangrui Chen,Chengdeng Wang,Haofeng Shi,Jinpeng Li,Jiashuai Wang,Zhi Wang,Zhaokun Wang,Liyuan Bai,Yan Gao,Guanyong Wang,Yousong Gu,Xiaoqin Yan
Referred to as potential options for anodes in sodium-ion batteries, transition metal chalcogenides (TMCs) exhibit unique electronic and structural characteristics. However, the limited electrical conductivity inherent in them poses a hindrance to electron transport, while their tendency to undergo volumetric expansion during cycling exacerbates structural instability, thereby imposing constraints on practical applications. Herein, a dual molten salt etching strategy followed by a sulfidation-selenidation process was employed to anchor multi-component sulfides FeS 2 /NiS and FeSe/NiSe onto conductive Ti 3 C 2 T x MXene, achieving superior sodium storage performance. Owing to the enhanced Na⁺ and faster kinetics of electronic transport, mechanical strain is effectively reduced, and strong covalent interactions are formed at the interface, significant enhancement in the cycling stability is observed for the anodes of Ti 3 C 2 T x @FeS 2 /NiS and Ti 3 C 2 T x @FeSe/NiSe (with specific capacities of 309.4 and 162.6 mAh g −1 , respectively, after 1000 cycles at 5 A g −1 , with a former retention capacity rate that can reach as high as 87.8 %) and exceptional rate performance (252.1 and 207.8 mAh g −1 , respectively, at 8 A g −1 ). Furthermore, full cells assembled by pairing Ti 3 C 2 T x @FeS 2 /NiS and Ti 3 C 2 T x @FeSe/NiSe with Na 3 V 2 (PO 4 ) 3 cathodes also demonstrate excellent cycling performance, with both configurations achieving up to 500 cycles. The suggested approach enables efficient utilization of byproducts from Lewis acidic etching, expanding possibilities for synthesizing high-performance anodes in sodium-ion batteries consisting of MXene and TMCs.
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OPTICAL MATERIALS
·
2024
·
IF 3.8
Zhenyu Zeng,Hongxing Xie,Yun Ye,Xingke Zheng,Qizhong Lin,Enguo Chen,Sheng Xu,Tailiang Guo
Alloyed quantum dots (QDs) show great potential for photoluminescence (PL) applications. However, the oxidative decay of QDs during photoexcitation has been a major hurdle to the application of QDs. Blocking water-oxygen erosion by coating oxides on the surface of QDs is a common technique. Even though, this approach often leads to alterations in the optical properties of QDs and reduced compatibility with polymers. In this paper, hindered phenol was utilized to treat QDs to form QD/Hindered phenol complexes. Using the reduction of phenolic hydroxyl group in the hindered phenol, the hindered phenol was used as an exhausted substance to protect QDs from oxidation . After 450 h of aging, the obtained QD/Hindered phenol complex kept the photoluminescence quantum yield (PLQY) at 48 %. The luminance of the QD diffusion plate prepared by the QD/Hindered phenol complexes maintained above 98 % of the initial value after aging 1032 h. The introduction of phosphite ester further improved the photostability of QD/Hindered phenol complex under blue-light excitation. This technique promotes the application of QDs in polymers and offers a new reference for improving the stability of QDs under photoexcitation.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
·
IF 8.1
Xiaona Fu,Xu Pan,Qing Wen,Ye Chen,Cunguo Lin,Haiping Gao,Zhenghui Qiu,Liuqingying Yang,Haitao Xu
Microbial fuel cell (MFC) shows potential as an environmentally friendly energy technology, but the low power density restricts their practical applications. In this study, polypyrrole (PPy), carbon nanotubes (CNTs) and MoSe 2 were synthesized into a novel nanocomposite (PPy/MoSe 2 /CNTs) via a straightforward hydrothermal and in situ polymerization approach and served as the anode material of MFC. The charge transfer resistance (R ct ) of the PPy/MoSe 2 /CNTs (4.75 Ω) anode was significantly lower than that of PPy/MoSe 2 (13.75 Ω) anode and MoSe 2 /CNTs (12.36 Ω) anode. Furthermore, the maximum power density of the PPy/MoSe 2 /CNTs-MFC was 4.43 W/m 2 , which was 1.99 times and 1.61 times higher than that of the PPy/MoSe 2 -MFC (2.22 W/m 2 ) and MoSe 2 /CNTs-MFC (2.74 W/m 2 ), respectively. High-throughput sequencing confirmed that PPy/MoSe 2 /CNTs bioanode demonstrated outstanding biocompatibility and the function of screening excellent electrogenic microbes. On the one hand, the good bioelectrocatalytic performance of the PPy/MoSe 2 /CNTs bioanode could be attributed to the abundant pyrrolic nitrogen in PPy, which enhanced the attachment of C-type cytochrome (Omcs) and promoted the direct electron transfer (DET) process between the biofilm and the electrode. In addition, the conductive bridging Mo–N bonds further promoted the direct transfer of electrons in PPy, mediating the long-distance DET process. On the other hand, well-dispersed MoSe 2 not only provided numerous active sites, but also enhanced the Se cycle of microorganisms by affecting their energy metabolism pathways, thereby improving their electricity generation capacity. In addition to the above, the high electrical conductivity of CNTs increased the interfacial charge transfer rate. This study explored the use of molybdenum-based ternary material as anode material to construct high-performance MFC, which provided meaningful information for future practical applications of MFC.
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ANALYTICAL CHEMISTRY
·
2024
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IF 6.7
Zhi-Gang Wang,Yusi Hu,Hao-Yang Liu,Hai-Yan Wen,Bao-Ping Qi,Shu-Lin Liu
Electrochemiluminescence (ECL) imaging, a rapidly evolving technology, has attracted significant attention in the field of cellular imaging. However, its primary limitation lies in its inability to analyze the motion behaviors of individual particles in live cellular environments. In this study, we leveraged the exceptional ECL properties of quantum dots (QDs) and the excellent electrochemical properties of carbon dots (CDs) to develop a high-brightness ECL nanoprobe (CDs-QDs) for real-time ECL imaging between living cells. This nanoprobe has excellent signal-to-noise ratio imaging capabilities for the single-particle tracking (SPT) of biomolecules. Our finding elucidated the enhanced ECL mechanism of CDs-QDs in the presence of reactive oxygen species through photoluminescence, electrochemistry, and ECL techniques. We further tracked the movement of single particles on membrane nanotubes between live cells and confirmed that the ECL-based SPT technique using CD-QD nanoparticles is an effective approach for monitoring the transport behaviors of biomolecules on membrane nanotubes between live cells. This opens a promising avenue for the advancement of ECL-based single-particle detection and the dynamic quantitative imaging of biomolecules.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Qingguo Yu,Yimin Liu,Qingru Zeng,Yuxiang Yang,Shunyan Ning,Yuezhou Wei,Xinpeng Wang,Deqian Zeng
Photocatalytic technology provides key benefits in utilizing solar energy for H 2 production and pollutant removal, making the pursuit of efficient photocatalysts a vital area of focus. Herein, a novel p-n heterojunction photocatalyst was synthesized by loading ZnSe nanoparticles onto Cu 2−x Se nanoplates, creating an internal electric field that facilitates the efficient separation of charge carriers and significantly enhances photocatalytic activity. The 14 % Cu 2−x Se/ZnSe nanocomposite exhibits excellent photocatalytic performance, achieving an H 2 production rate of 1846 μmol·g −1 ·h −1 , roughly 34 times that of pure ZnSe. Additionally, the Cr(VI) reduction rate constant of nanocomposite was 0.0277 min⁻¹ , which is 20 times and 5 times higher than those of ZnSe and Cu 2−x Se, respectively. The Cu 2−x Se/ZnSe photocatalyst demonstrated exceptional stability and reusability during multiple cycles of H 2 production and Cr(VI) reduction. An in-depth examination of experimental data and density functional theory (DFT) calculations led to proposing a potential mechanism. This work introduces a simple synthesis method for ZnSe-based photocatalysts, offering a novel approach for the effective application of solar energy in environmental and energy fields.
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