Electrocatalysis
·
2019
·Vol. 10
·期 3
·277-286
·
IF 2.311
Chen Xiaowen,Wang Si,Wang Yan,Yang Zheng,Liu Sa,Gao Jingxia,Su Ziqian,Zhu Ping,Zhao Xinsheng,Wang Guoxiang
One-dimension (1D) heteroatom-doped mesoporous carbon is a promising alternative catalyst for oxygen reduction reaction (ORR). This work reported a hybrid ORR electrocatalyst composed of Co/CoO x nanoparticles embedded in N-doped mesoporous carbon layer coated on carbon nanotubes (CNTs@Co–N–C). Owing to the 1D mesoporous architecture with abundant active sites, CNTs@Co–N–C hybrid showed superior ORR activity, high selectivity, and long-term durability. Moreover, as cathode catalyst for primary Zn–air battery, CNTs@Co–N–C also showed excellent performance comparable to Pt/C. Thus, this study can offer a good idea for preparing noble-metal-free electrocatalysts for energy applications.
A 1D hybrid electrocatalyst composed of Co/CoO x nanoparticles embedded in N-doped mesoporous carbon layer coated on carbon nanotubes (CNTs@Co–N–C) was prepared for efficient ORR.
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Regenerative Biomaterials
·
2025
·
IF 8.1
Zhang Ting,Yu Yameng,Yuan Wei,Ren Zeqi,Cheng Yan,Wu Shuilin,Zheng Yufeng,Xia Dandan
Biodegradable Zn alloy have recently gained considerable attention for use in bone implants considering their biodegradability, attractive mechanical properties, and bioactivity. However, excessive corrosion of Zn alloy at the early stage of implantation may cause severe cytotoxicity, resulting in insufficient osseointegration, which hinders the clinical use of the Zn alloy. In this study, we designed a photothermal-controlled degradative hybrid coating as corrosion-protective barrier with the intention of preventing Zn ion burst release during the early stages of implantation and regaining the alloy's corrosion advantage later on. The coating consisting of Zeolite imidazole skeleton-encapsulated indocyanine green core-shell structured nanoparticles and polylactic coglycolic acid (ICG@ZIF-8/PLGA) on pristine Zn-0.8 (wt.%) Li (ZL) alloy. The electrochemical test results indicated that coating ZL with ICG@ZIF-8/PLGA might effectively reduce its corrosion current density (icorr) from 2.48 × 1 0 −5 A•cm−2 to 2.10 × 1 0 −8 A•cm−2. After near-infrared light irradiation, ICG@ZIF-8 heated PLGA coating to reach Tg, so that the coating was degrading, and the icorr of coated ZL alloy decreased to 2.50 × 1 0 −7 A•cm−2, thus restoring corrosion advantage. Both in vitro and in vivo investigations showed that coated ZL alloy had acceptable biocompatibility. Overall, the development of the photothermally controlled coating improved the Zn alloy's resistance to corrosion and allowed for the adjustment of the coated ZL alloy's rate of degradation through the use of 808 nm NIR laser irradiation.
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高影响因子
ENERGY & FUELS
·
2025
·
IF 5.3
Tianxiang Guo,Changxin Ma,Xilai Wang,Zijun Men,Baijiang Liu,Alemayehu Hailu Bedane
The electrochemical reduction of CO2 to high-value C2 products, particularly ethanol, represents a promising strategy for mitigating greenhouse gas emissions and addressing climate challenges. However, the rational design of efficient electrocatalysts for this process remains hindered by insufficient activity, selectivity, and mechanistic understanding. So, this work developed a hierarchically structured copper–zinc bimetallic catalyst (CuZn-DAT) via a novel potential-step electrodeposition (PSE) method, employing diaminotriazole (DAT) as both a morphology-directing agent and electronic stabilizer. Multimodally comprehensive characterization (BET/SEM/TEM/XRD/EDS/ICP-OES/XPS) revealed a three-dimensional porous architecture with optimized electronic configurations, where Zn alloying narrowed the HOMO–LUMO gap, while DAT coordination suppressed Cu surface reconstruction. Electrochemical evaluations (CV/LSV/EIS/GC/1H NMR) demonstrated exceptional CO2-to-ethanol conversion performance, achieving a total Faradaic efficiency (FE) exceeding 75% at current densities above 50 mA cm–2, with ethanol dominating C2 products at 87% selectivity (FEethanol = 19.9%). Zn incorporation boosted FEethanol and partial current density by 325 and 600%, respectively, while subsequent DAT modification further enhanced these metrics by 194 and 292%. Mechanistic studies combined with density functional theory (DFT) calculations identified the accelerated *CO dimerization kinetics and stabilized *CO–CHO intermediates as critical factors. A dominant stepwise reaction pathway of CO2-to-ethanol conversion on the CuZn-DAT catalyst was established as CO2 (g) → *CO2 → *CO2– → *COOH → *CO → *CHO → *CO–CHO → *OHCH2CH3 → CH3CH2OH (l). This work establishes a dual-modification strategy (Zn alloying + organic stabilization) that advances the development of efficient electrocatalysts for sustainable CO2-to-ethanol conversion, providing fundamental insights into C–C coupling mechanisms and catalyst design principles for multicarbon product formation.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Tinglong Chen,Xueliang Zhang,Shengzhe Zhou,Dong Fang,Dinghao Luo,Zhaoyang Ran,Yingchun Liu,Cheng Xu,Jinhao Cao,Xiaodong Li,Yongqiaong Hao,Xiaoqing Wang,Liang Deng
Persistent infections, oxidative stress, and vascular damage in diabetic wounds require multifunctional dressings tailored to complex wound healing process. Herein, a coordination nanocomplexes of Zn@Met were synthesized by chelating Zn 2+ with metformin (Met). These coordination nanocomplexes were subsequently integrated into an injectable self-healing hydrogel comprising methacrylic anhydride-modified gelatin (GelMA) and oxidized konjac glucomannan (OKGM). Through free-radical polymerization as well as hydrogen and schiff base bonds formation, we fabricated an pH-responsive composite hydrogel, named GO@ZM, which exhibited remarkable antibacterial efficacy, antioxidant capabilities, and potent modulation of inflammatory responses. In the final stages of wound healing, the composite hydrogel significantly enhanced macrophage polarization, angiogenesis, and collagen deposition, expediting the wound site’s re-epithelialization process. Collectively, this study introduces a pioneering hydrogel for the treatment of infected diabetic wounds and holds the potential to spark fresh perspectives on the development of high-performance hydrogels for diverse biomedical applications.
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INDUSTRIAL CROPS AND PRODUCTS
·
2025
·
IF 6.2
Dujuan Wu,Ruiqi Xin,Lingling Hu,Onder Tor,Ye Song,Song Li,Meiling Chen,Wenkai Zhu
Indoor air pollution presents a significant challenge to human health, driving the development of advanced materials for indoor environmental remediation. Metal–organic frameworks (MOFs) derived materials possess great promise as promising candidates for addressing this challenge. In this work, the delignified bamboo with multi-scale structure was employed as a substrate to fabricate ZIF-8@bamboo by in-situ and ex-situ growth strategies. The results demonstrated that the delignified bamboo exposed polysaccharided cellulose active group originally present in the bamboo cell walls. The pretreated bamboo was facilitated to the uniform growth of ZIF-8 crystals, and the loaded ZIF-8 exhibited high crystallinity and well-distributed morphological characteristics. Moreover, the successful growth of ZIF-8 increased the bamboo’s specific surface area. Additionally, the formaldehyde adsorption tests revealed that the ZIF-8@bamboo exhibited a 227.73 % improvement for formaldehyde adsorption rate at room temperature. Meanwhile, it also showed a rapid adsorption rate, high adsorption capacity, and reusable performance for formaldehyde. Furthermore, the as-prepared ZIF-8@bamboo demonstrated high removal efficacy for other indoor pollutants, including PM2.5 and PM10. Moreover, the ZIF-8@bamboo exhibited high indoor pollutant removal efficiency after five repeated cycles. Therefore, the ZIF-8@bamboo proposed in this work provides an effective solution to address indoor environmental pollution.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2020
·
IF 5.162
Lei Qiu,Jing Zhang,Ji-Zheng Song,Shun-Juan Hu,Tong-Sheng Zhang,Ze Li,Juan-Juan Wang,Wen Cheng
Chitin is one of the major components of the fungal cell wall and contributes to the mechanical strength and shape of the fungal cell. Zn(II) 2 Cys 6 transcription factors are unique to the fungal kingdom and have a variety of functions in some fungi. However, the mechanisms by which Zn(II) 2 Cys 6 proteins affect entomopathogenic fungi are largely unknown. Here, we characterized the Zn(II) 2 Cys 6 transcription factor BbTpc1 in the insect pathogenic fungus Beauveria bassiana . Disruption of BbTpc1 resulted in a distinct changes in vegetative growth and septation patterns, and a significant decrease in conidia and blastospore yield. The Δ BbTpc1 mutant displayed impaired resistance to chemical stresses and heat shock and attenuated virulence in topical and intrahemocoel injection assays. Importantly, the Δ BbTpc1 mutant had an abnormal cell wall with altered wall thickness and chitin synthesis, which were accompanied by transcriptional repression of the chitin synthetase family genes. In addition, comparative transcriptomics revealed that deletion of BbTpc1 altered fungal asexual reproduction via different genetic pathways. These data revealed that BbTpc1 regulates fungal development, chitin synthesis and biological control potential in B . bassiana .
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ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Kuang Sheng,Qingfeng Yi,A-Ling Chen,Yuebing Wang,Yuhui Yan,Huidong Nie,Xiulin Zhou
Searching for high-quality air electrode catalysts is the long-term goal for the practical application of Zn–air batteries. Here, a series of coexistent composite materials (CoNi/NHCS-TUC-x) of cobalt–nickel supported on nitrogen-doped hollow spherical carbon and tubular carbon are obtained using a simple pyrolysis strategy. Co and Ni in the composites are mainly present in the form of alloy nanoparticles, M–Nx and M–Cx (M = Co or Ni) species, with high oxygen reduction reaction (ORR)/oxygen evolution reaction (OER) electroactivity. The materials containing different proportions of spherical carbon and tubular carbon obtained by simply adjusting the raw materials for generating tubular carbon exhibit interesting bifunctional performance: samples with an abundant tubular content have the highest ORR onset potential (0.91 V vs reversible hydrogen electrode), while those with a rich spherical content have the highest ORR current density (5.13 mA·cm–2). Furthermore, CoNi/NHCS-TUC-3 provides the lowest potential difference (ΔE = Ej=10 – E1/2) of 0.806 V. We then test the potential possibility of CoNi/NHCS-TUC-3 as an air electrode for primary and rechargeable Zn–air batteries. The primary battery delivers an open-circuit potential of 1.59 V, a peak power density of 361.8 mA·cm–2, and a specific capacity of 756.5 mA h·gZn–1. The rechargeable battery could be cycled stably for more than 55 h at 10 mA·cm–2. These characteristics make CoNi/NHCS-TUC-3 a superior electrocatalyst for both the ORR and OER, as well as a suitable bifunctional electrode applied to a rechargeable Zn–air battery.
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高影响因子
Journal of Energy Chemistry
·
2021
·
IF 9.676
Xingkun Wang,Guangming Zhan,Yurou Wang,Yan Zhang,Jian Zhou,Ren Xu,Huiyu Gai,Huanlei Wang,Heqing Jiang,Minghua Huang
It is significant for the rational construction of the high–efficient bifunctional electrocatalysts for in–depth understandings of how to improve the electron transfer and ion/oxygen transport in catalyzing oxygen reduction reaction and oxygen evolution reaction (ORR and OER), but still full of vital challenges. Herein, we synthesize the novel “three–in–one” catalyst that engineers core–shell Mott–Schottky Co 9 S 8 /Co heterostructure on the defective reduced graphene oxide (Co 9 S 8 /Co–rGO). The Co 9 S 8 /Co–rGO catalyst exhibits abundant Mott–Schottky heterogeneous–interfaces, the well–defined core–shell nanostructure as well as the defective carbon architecture, which provide the multiple guarantees for enhancing the electron transfer and ion/oxygen transport, thus boosting the catalytic ORR and OER activities in neutral electrolyte. As expected, the integrated core–shell Mott–Schottky Co 9 S 8 /Co–rGO catalyst delivers the most robust and efficient rechargeable ZABs performance in neutral solution electrolytes accompanied with a power density of 59.5 mW cm −2 and superior cycling stability at 5 mA cm −2 over 200 h. This work not only emphasizes the rational designing of the high–efficient bifunctional oxygen catalysts from the fundamental understanding of accelerating the electron transfer and ion/oxygen transport, but also sheds light on the practical application prospects in more friendly environmentally neutral rechargeable ZABs.
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APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Xinhui Sun,Yanjie Chen,Mengmeng Ji,Weiya Zhang,Zhizhong Sun,Wenyi Chu,Xin Wang
Developing efficient bimetallic Ni/Zn metal organic frameworks (MOFs) derived Ni 3 ZnC 0.7 alloy catalyst for cyclization reactions is highly anticipated. Bimetallic Ni/Zn- PTA MOFs with flower-like microspheres morphology was synthesized by using a facile hydrothermal method and used as a precursor for preparation of the catalyst. Then, a ZnO supported Ni-Ni 3 ZnC 0.7 incorporated carbon catalyst (Ni-Ni 3 ZnC 0.7 /ZnO-C) was obtained by deriving from the Ni/Zn- PTA MOFs through one-step pyrolysis. The developed Ni-Ni 3 ZnC 0.7 /ZnO-C catalyst was used as a recoverable heterogeneous catalyst for synthesis of 2-arylbenzimidazoles by cyclization reaction of phenylmethanamines and 2-nitroanilines in good yields. Various characterizations (e.g. SEM/EDX, XRD, TEM, FT-IR, XPS and Raman) revealed that the catalyst exhibited good performance for cyclization reaction, which are ascribed to particular hierarchical structure, as well as synergistic effect between Ni and Ni 3 ZnC 0.7 . As a result, the Ni-Ni 3 ZnC 0.7 /ZnO-C catalyst showed excellent stability and activity for the condensation cyclization reaction. This bimetallic MOFs-derived Ni-Ni 3 ZnC 0.7 catalyst opens up a potential way for fabricating other Carbon supported alloy catalysts in heterogeneous catalysis reactions.
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ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Kun Gao,Mengxia Shen,Chao Duan,Chuanyin Xiong,Lei Dai,Wei Zhao,Wanli Lu,Shujiang Ding,Yonghao Ni
A reasonable design of the pore structure of carbon nanofiber-based electrocatalysts can effectively accelerate the slow kinetics of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). In this study, we report an electrospinning method by adding supramolecular coordination polymers to selected polyacrylonitrile (PAN) and cellulose acetate (CA) spinning systems. Benefiting from the difference in the thermal decomposition temperature of each component during the pyrolysis process, CA was applied as a sacrificial template to prepare a high-efficiency ORR/OER bifunctional electrocatalyst (Co-N@PCNFs-0.2) with directional hollow channels and a hierarchical pore structure. This unique multichannel carbon nanofiber morphology and hierarchical pore structure led to abundant active sites while also boosting the electron transfer rates. Notably, applying Co-N@PCNFs-0.2 as an air electrode to Zn–air batteries results in a large specific discharge capacity of 884 W h kgZn–1 and a maximum power density of 151 mW cm–2.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Lei Cao,Maliang Zhang,Kunmei Su,Feng Gu,Zhenhuan Li
Decorating porous carbon nanomaterials with rich homodispersed metal cluster and heteroatoms can effectively shorten the diffusion pathway of oxygen and expose more active sites, thereby promoting oxygen reduction reaction (ORR). Herein, hierarchical porous carbon nanorods with homodispersed Fe–N x –C active sites are obtained by calcination , etching and ammonia activation of Fe-nitrogenous acid (NTA) coordination polymer nanowires. The obtained Fe-PCNRs-700 as ORR catalysts show the excellent activity with half wave potential (E 1/2 ) of 0.71 V vs. reversible hydrogen electrode (RHE) in 0.5 M H 2 SO 4 and 0.87 V vs. RHE in 0.1 M KOH electrolyte, which owe to its huge specific surface area (1652 m 2 g −1 ), hierarchical pore structure , homodispersed Fe–N x –C active sites and structural defects. Furthermore, using Fe-PCNRs-700 as a cathode catalyst in both liquid and flexible solid Zn-air batteries, and the assembled liquid batteries display the high power density of 161 mW cm −2 and robust charge/discharge stability of 116 h.
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CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Mingyang Yu,Ying Tang,Jie Li,Weishuang Fang,Lian Duan,Liang Fang
Two novel ATeMoO 6 (A = Mg, Zn) ceramics with ultra-low sintering temperature were fabricated through traditional solid-state reaction. Both ceramics have an orthorhombic structure in space group P 2 1 2 1 2, which was indicated by X-ray diffraction. The crystal structure, sintering characteristics, microstructure and microwave dielectric properties were discussed. MgTeMoO 6 ceramic sintered at the ultra-low temperature of 660 °C for 6 h achieved excellent microwave dielectric properties with ε r = 11.93, Q × f = 34,453 GHz and τ f = – 82 ppm/°C, whereas ZnTeMoO 6 had the corresponding performances of ε r = 12.39, Q × f = 29,153 GHz and τ f = – 87 ppm/°C at 650 °C for 6 h. The good chemical stability with Al indicates that ATeMoO 6 (A = Mg, Zn) ceramics may be potential candidates for ultra-low temperature co-fired ceramic technology (ULTCC) applications.
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