FUEL
·
2025
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IF 7.5
Lu Wang,Chuhao Wang,Yuhe Mu,Jingrui Fan,Xiubei Yang,Chengbing Yu,Bing Guo,Gaofeng Zeng
This study reports on the fabrication and characterization of nanofibrous high-entropy alloy (HEA)-based electrocatalysts supported by highly mesoporous carbon materials for efficient alkaline water electrolysis. Employing a synergistic approach of electrospinning, activation, and carbonization, we have developed a material with a high specific surface area and unique structural features that significantly enhance catalytic activity. The FeCoNiMnRu-HCB 0.5 electrode material showcased superior electrocatalytic performance for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), with low overpotentials of 42 mV for HER and 229 mV for OER at a current density of 10 mA cm −2 . These values are notably lower than those of commercial noble metal catalysts. The electrode material demonstrated excellent stability over prolonged periods of electrolysis, indicating its potential for practical applications in energy storage and conversion technologies. Our results suggest that this HEA-based electrocatalyst is a promising candidate for next-generation electrocatalytic materials, offering high efficiency and durability for water splitting in alkaline media.
研究领域:
材料科学
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能源化学
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Jingwei Li,Peiman Xu,Rongfu Zhou,Ruchun Li,Lijun Qiu,San Ping Jiang,Dingsheng Yuan
Large-scale commercialization of water splitting is still challenging due to the lack of efficient, cost-effective and robust electrodes. In this work, Co 9 S 8 –Ni 3 S 2 heterointerfaced nanotubes on Ni foam (Co 9 S 8 –Ni 3 S 2 HNTs/Ni) have been successfully developed via a two-step hydrothermal method as a highly efficient, robust and flexible bifunctional electrodes for water splitting. Co 9 S 8 –Ni 3 S 2 HNTs are composed of inner 1D Co 9 S 8 nanotubes surrounded by outer 2D Ni 3 S 2 nanosheets . Co 9 S 8 –Ni 3 S 2 HNTs/Ni electrode achieves 10 mA cm −2 at overpotentials of 85 mV for H 2 evolution reaction (HER) and 50 mA cm −2 at overpotential of 281 mV for O 2 evolution reaction (OER) in 1 M KOH solution, substantially better than that on single-phased Co 9 S 8 nanotubes and Ni 3 S 2 nanosheets on Ni foam. The reason is most likely due to formation of defect-rich heterointerfaces between Co 9 S 8 nanotubes and Ni 3 S 2 nanosheets, and the significant change of binding energies of Co 2p and Ni 2p level between the Co 9 S 8 and Ni 3 S 2 , leading to the synergistic effect on the enhanced catalytic activity for HER and OER. The robust and flexibility of Co 9 S 8 –Ni 3 S 2 HNTs/Ni electrodes are demonstrated in an alkaline electrolyzer, delivering 10 mA cm −2 electrolysis current at a cell voltage of 1.59 V, one of the best bifunctional electrodes for water splitting. Owing to the fact that reaction occurs at the defects-rich heterointerfaces, the Co 9 S 8 -Ni 3 S 2 HNTs/Ni electrodes are structurally very stable.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
RSC Advances
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2017
·Vol. 7
·期 13
·7906-7913
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IF 3.108
Qingshuang Liang,Keke Huang,Xiaofeng Wu,Xiyang Wang,Wei Ma,Shouhua Feng
Ni2−xCoxP (0 ≤ x ≤ 2) nanocrystals (NCs) with good control of composition are synthesized by a facile economical approach. Low-cost air-stable triphenylphosphine is used as phosphorus source and NaBH4 is added to facilitate the reaction, which helps to carry out the reaction at relatively low temperature (250 °C). By modulating the Ni/Co precursor ratios, the composition of Ni2−xCoxP NCs can be tuned over the whole range. A comprehensive study of the key role of NaBH4 on the metal phosphide NCs formation reveals that NaBH4 can efficiently activate the triphenylphosphine, lowering the thermodynamic barrier for the P–C bond broken and thus reducing the reaction temperature. As-prepared Ni2−xCoxP NCs show Ni/Co-composition dependent catalytic performance on both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). In particular, OER catalytic activities follow the volcano relationship due to the synergistic effect. The Ni1.0Co1.0P NCs exhibit the highest OER catalytic activity with the overpotential of 0.34 V at a current density of 10 mA cm−2, among the top tier of water oxidation catalysts. In addition to providing a new green low-cost route to composition controllable synthesis of ternary phosphides, this work also contributes to fundamental guideline on rational design of low-cost high-efficient catalysts for water splitting.
研究领域:
材料科学
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电化学
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催化化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2017
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IF 3.582
Mengtian Zhang,Suqin Ci,Hao Li,Pingwei Cai,Huimin Xu,Zhenhai Wen
It is highly desirable to develop low-cost and highly-efficiency electrocatalysts toward hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) for implementing full water splitting in developing a sustainable green energy system . Herein, we report a reliable and facile anion-exchange reaction strategy for conversion of one-dimensional (1D) Co 3 O 4 nanowires (NWs) into CoP porous nanowires (PNWs). Notably, such evolution process provides the as-formed CoP PNWs with significantly improved defect sites and thus endows the CoP PNWs with a high electrochemical activity surface area. Accordingly, the CoP PNWs exhibit outstanding catalytic activity toward HER and OER when serving as bifunctional electrocatalysts, achieving a current density of 10 mA cm −2 with low overpotentials of 147 and 326 mV for HER and OER, respectively. We demonstrate the water splitting electrolyzer with such CoP PNWs electrocatalyst as cathode and anode can be driven by a double A battery and a solar panel (1.5 V). The advantages, including facile and low-cost synthetic process, high activity for HER and OER, endow the as-developed CoP PNWs to be one of the most promising candidates for full water splitting system.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
Small
·
2022
·Vol. 18
·期 45
·2204255
·
IF 15.153
Zhaoqian Chen,Jingbo Wen,Chaohui Wang,Xiongwu Kang
High entropy alloy (HEA) catalysts exhibit excellent multifunctional catalytic performance due to the synergistic effect of multi-metal components. However, shape-controlled synthesis of such kinds of HEA catalysts, especially those with high index facets, still faces great challenges, limiting further enhancement of their catalytic performance. Herein, one-pot synthesis of convex cube-shaped Pt 34 Fe 5 Ni 20 Cu 31 Mo 9 Ru HEA catalysts which possess rich (310) facets and a diagonal crystalline size of 38.5 nm is reported. Transmission electron microscopy measurements indicate cube-shaped nanocrystals are obtained first and further selective growth of pyramid on each facet of the cube-shaped nanocrystal results in a convex cube shape. Pt 34 Fe 5 Ni 20 Cu 31 Mo 9 Ru HEA catalysts show excellent electrocatalytic performance toward the oxygen reduction reaction (ORR), hydrogen evolution reaction (HER), and oxygen evolution reaction (OER), which exhibit a half-wave potential of 0.87 V for ORR in 0.1 m HClO 4 , and overpotential of 20 and 259 mV for HER and OER at a current density of 10 mA cm −2 in an alkaline medium. A control experiment and density functional theory calculation indicate that the Ru element plays a decisive role in both the formation of the convex cube shape and also the high catalytic performance.
研究领域:
材料科学
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电催化
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理论计算
✓ 已验证
DOI
高影响因子
mLife
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2025
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IF 4.5
Huahui Chen,Fengfeng Zheng,Xi Feng,Zijing Huang,Wei Yang,Chuanlun Zhang,Wenbin Du,Kira S. Makarova,Eugene V. Koonin,Zhirui Zeng
Eukaryotes are hypothesized to be archaeal–bacterial chimeras. Given the different chemical structures of membrane phospholipids in archaea and bacteria, transformations of membranes during eukaryogenesis that led to the bacterial-type membranes of eukaryotic cells remain a major conundrum. One of the possible intermediates of eukaryogenesis could involve an archaeal–bacterial hybrid membrane. So far, organisms with hybrid membranes have not been discovered, and experimentation on such membranes has been limited. To generate mixed membranes, we reconstructed the archaeal membrane lipid biosynthesis pathway in Escherichia coli , creating three strains that individually produced archaeal lipids ranging from simple, such as DGGGOH (digeranylgeranylglycerol) and archaeol, to complex, such as GDGT (glycerol dialkyl glycerol tetraether). The physiological responses became more pronounced as the hybrid membrane incorporated more complex archaeal membrane lipids. In particular, biosynthesis of GDGT induced a pronounced SOS response, accompanied by cellular filamentation, explosive cell lysis, and ATP accumulation. Thus, bacteria seem to be able to incorporate simple archaeal membrane lipids, such as DGGGOH and archaeol, without major fitness costs, compatible with the involvement of hybrid membranes at the early stages of cell evolution and in eukaryogenesis. By contrast, the acquisition of more complex, structurally diverse membrane lipids, such as GDGT, appears to be strongly deleterious to bacteria, suggesting that this type of lipid is an archaeal innovation. Impact statement The formation of archaeal–bacterial hybrid membranes represents possible intermediates in early life evolution and eukaryogenesis. In this study, we synthesized archaeal membrane-spanning lipid GDGT (glycerol dialkyl glycerol tetraether) in bacteria Escherichia coli to create such hybrid membranes and examined their physiological properties. Our results suggest that the formation of hybrid membranes containing simple archaeal-type lipids could be a plausible intermediate stage at major evolutionary transitions, whereas more complex, membrane-spanning lipid GDGT would have been deleterious and probably represent a later archaeal innovation, possibly an adaption to thermal habitats. These findings provide new insights and perspectives into the evolution of membranes at the earliest stages of cellular evolution as well as at eukaryogenesis.
研究领域:
微生物学
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分子生物学
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进化生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2024
·
IF 10.7
Shuaipeng Wang,Shengli Zhu,Zhenduo Cui,Zhaoyang Li,Shuilin Wu,Wence Xu,Zhonghui Gao,Yanqin Liang,Hui Jiang
The quest for a cost-effective, high-performance catalyst for hydrogen production from electrolyzed water across a broad pH range holds immense importance. B, N co-doped Mo2C was first synthesized via microwave plasma chemical vapor deposition (MPCVD) for efficient hydrogen production from electrolyzed water. The B, N-Mo2C catalyst demonstrates a requirement of 81 mV in 1.0 M KOH to achieve a current density of 10 mA cm−2. Density functional theory (DFT) calculations revealed that B, N co-doping optimizes the charge transfer between H* and Mo2C, diminishes the excessive hydrogen binding energy of Mo2C, and supports effective and stable hydrogen evolution reaction (HER) conduction in diverse settings. This doping strategy offers a systematic design approach for designing highly active noble-metal-free HER catalysts.
研究领域:
材料科学
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理论计算化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Rui Gao,Xin Wang,Xue Zhang,Shumeng Zhang,Xinxin Li,Xue-Feng Yu,Licheng Bai
The reserves of palladium (Pd) and platinum (Pt) are scarce and require sophisticated processing. Herein, a three-stage recovery process with black phosphorus (BP) is established in this study to recover Pd and Pt from spent catalysts, presenting a promising strategy for addressing the precious metals crisis. The recovery efficiency of Pd is 99.36 % ± 0.08 % after two stages, with a total recovery capacity of 1426.11 ± 1.73 mg Pd g −1 BP, which is 90 times higher than that of the latest technologies. The overall recovery efficiency of Pt (II) is 98.62 % (467.91 mg Pt g −1 BP) after the third stage (45 °C, 30 min). Furthermore, the current density of the optimal catalysts generated in the first stage (weight ratio: Pd:Pt = 4.9:1) is the highest (57.61 mA cm −1 ; overpotential = 70 mV vs. RHE) among the catalysts generated in the second (Pd:Pt = 1:1) and third (Pd:Pt = 1:11) stages. Pd/Pt–BP generated in the first stage further achieved remarkable long-term stability of 225 h (10 mA cm −2 ) and exhibited maximum durability of > 400 h. Owing to the reduced capability and activation of BP to metals, immobilized Pd (II) and Pt (II) are recovered and directly converted to long-term stable hydrogen evolution catalysts without complex processing.
研究领域:
材料科学
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催化化学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Synthetic Biology
·
2022
·
IF 5.249
Jiawei Li,Mario Roque Huanca Nina,Xiaoyan Zhang,Yunpeng Bai
Poly(ethylene terephthalate) (PET) and phthalate esters (PAEs) are used extensively as plastics and plasticizers. Enzymatic degradation of PET and PAEs has drawn great attention in recent years; however, evolution of PET- and PAE-degrading enzymes is still a big challenge, partly because of the lack of an effective screening method to detect phthalic acid (PA) and terephthalic acid (TPA), which are the main hydrolysis products of PAEs and PET. Here, by directed evolution of a promiscuous transcription factor, XylS from Pseudomonas putida, we created two novel variants, XylS-K38R-L224Q and XylS-W88C-L224Q, that are able to bind PA and TPA and activate the downstream expression of a fluorescent reporter protein. Based on these elements, whole-cell biosensors were constructed, which enabled the fluorimetric detection of as little as 10 μM PA or TPA. A PAE hydrolase, GoEst15, was preliminarily engineered using this new biosensor, yielding a mutant GoEst15-V3 whose activity toward dibutyl phthalate (DBP) and p-nitrophenyl butyrate was enhanced 2.0- and 2.5-fold, respectively. It was shown that 96.5% DBP (5 mM) was degraded by GoEst15-V3 in 60 min, while the wild-type enzyme degraded only 55% DBP. This study provides an effective screening tool for directed evolution of PAE-/PET-degrading enzymes.
研究领域:
生物技术
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环境工程
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生物化学
✓ 已验证
DOI
PubMed
高影响因子
DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY
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2025
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IF 2.4
Hao Wang,Junfu Guo,Xuanyi Chen,Siqi Liu,Wenna Li,Lu Yang,Jianmiao Wang,Yinglun Han
The regulation of inflammatory balance is central to immune homeostasis, with disruptions contributing to autoimmune diseases. As representatives of early vertebrates, lampreys offer a valuable model for investigating the evolutionary foundations of immune regulation. This study examines the dual role of L-TGF-β2 in modulating inflammation in lampreys, providing insights into the evolutionary origins of immune homeostasis mechanisms. Using lipopolysaccharide (LPS)-induced inflammation models, recombinant L-TGF-β2 was found to enhance leukocyte chemotaxis in quiescent states while inhibiting excessive migration during activation. Quantitative PCR revealed that L-TGF-β2 stimulates pro-inflammatory cytokine expression during early inflammatory phases and attenuates it during resolution. Tissue-specific expression patterns of TGF-β receptors indicated their potential role in mediating the distinct regulatory effects of L-TGF-β2 across diverse immune environments. These findings align with the biphasic functions of TGF-β observed in higher vertebrates, underscoring the evolutionary conservation of this signaling pathway. This research enhances understanding the functional versatility of TGF-β signaling and its pivotal role in vertebrate immune evolution, providing insights into ancient mechanisms of immune homeostasis and their modern implications for inflammatory disease research.
研究领域:
免疫学
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进化生物学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Infection and Drug Resistance
·
2022
·
IF 4.177
Yingying Du,Shikui Mu,Yan Liu,Yinghua Yuan,Yunlou Zhu,Lijie Ma,Qixing Wang,Zhengfang Zhu,Yuhao Liu,Sheng Wang
Purpose This study retrospectively analyzed the genome characteristics of blaKPC-2 in multidrug-resistant Klebsiella pneumoniae collected from the ICU of a teaching hospital in Shanghai, China.Methods From February 2018 to December 2019, 36 strains of multidrug-resistant Klebsiella pneumoniae were collected from the bronchoalveolar lavage fluid of critically ill patients. The genome of all isolates was obtained through the Illumina sequence, and single nucleotide polymorphisms of the blaKPC-2 gene were analyzed to explore blaKPC-2’s evolutionary characteristics. Different strains’ genetic relationships and homology were studied by constructing an evolutionary tree on a single copy orthologue. Pacbio combined Illumina sequence was conducted to evaluate the structure and potential mobility of drug-resistant plasmids of the strain KP-s26.Results The distribution of resistance and virulence genes had little difference, but most strains had significant differences in the plasmid-encoded region. Most strains (31/36) carried the carbapenemase gene blaKPC-2, with no single nucleotide polymorphism in different strains. Extended-spectrum β-lactamase resistance genes, such as blaCTX-M and blaSHV, were found in the isolates, but no metallo-β-lactamases were detected. All strains with blaKPC-2 coexisted with chromosomal-associated fosfomycin resistance genes fosA6, and the coexistence of blaKPC-2 and blaCTX variants (blaCTX-M-15, blaCTX-M-65, and blaCTX-M-27) was also detected in 29/31 strains. The isolate KP-s26 carried five circular plasmids. pA and pB were conjugate plasmids, as they carried drug resistance genes and contained a complete IV secretion system.Conclusion The blaKPC-2 carbapenemase gene is relatively conservative in the process of evolution; drug-resistant plasmids containing conjugated transfer elements contribute to the spreading of drug resistance. The coexistence of blaKPC-2 with fosA6 or blaCTX-M variants was associated with increased fosfomycin resistance and broad-spectrum β-lactam resistance, respectively.Clinical Trials Registration Clinical Trials.gov Identifier: NCT03950544
研究领域:
微生物学
·
基因组学
·
传染病学
✓ 已验证
DOI
PubMed
高影响因子
Nano Research
·
2023
·Vol. 16
·期 5
·6568-6576
·
IF 9.9
Zhang Genrui,Li Xiaojing,Li Na,Wu Tingting,Wang Lei
Constructing 2D/2D face-to-face heterojunctions is believed to be an effective strategy to enhance photocatalytic performance due to the enlarged contact interface and increased surface active sites. Herein, 2D porous NiCo oxyphosphide (NiCoOP) was synthesized for the first time and coupled with graphitic carbon nitride (g-C 3 N 4 ) nanosheets to form 2D/2D heterojunctions via an in-situ phosphating method. The optimal 4 wt.% 2D/2D NiCoOP/g-C 3 N 4 (OPCN) photocatalyst achieves a hydrogen evolution rate of 1.4 mmol·h −1 ·g −1 , which is 33 times higher than that of pure g-C 3 N 4 . The greatly improved photocatalytic performance of the composite photocatalysts could be attributed to the formation of interfacial surface bonding states and sufficient charge transfer channels for accelerating carrier separation and transfer and the porous structure of NiCoOP nanosheets with abundant surface active sites for promoting surface reactions. Amazingly, the 2D/2D OPCN composite photocatalysts also exhibit superior stability during photocatalytic reactions. This study not only designs new noble-metal-free NiCoOP/g-C 3 N 4 composite photocatalysts but also provides a new sight in fabricating face-to-face 2D/2D heterojunctions for their application in energy conversion areas.
研究领域:
材料科学
·
能源转换
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）