INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
·
IF 8.3
Boan Cui,Jiahao Zhao,Yuanyuan Liu,Gangqiang Wu,Jinlong Cui
Si-based hydrolysis hydrogen production is considered a promising green hydrogen generation technology due to its ability to rapidly release hydrogen under ambient temperature and pressure, with non-toxic and pollution-free reaction products. However, the intrinsic chemical inertness of silicon and the rapid formation of a dense SiO 2 passivation layer on its surface in aqueous environments severely hinder its reaction with water, thereby limiting the hydrolysis reaction rate and hydrogen production efficiency. In this work, waste silicon powder was mixed with calcium hydride (CaH 2 ) via ball milling to prepare Si/CaH 2 composite materials. The key factors influencing their hydrolysis performance were investigated by varying the ball milling time and hydrolysis conditions. The Si/CaH 2 @15h sample exhibited a high hydrogen yield of 1049 mL/g and an impressive hydrogen generation efficiency of 91.06 % when hydrolyzed in 0.5 M NaF solution. This composite material also demonstrated excellent hydrogen generation performance in fuel cell testing, achieving effective hydrogen-to-electricity conversion. This study provides a new approach for Si-based hydrolysis hydrogen production and photovoltaic resource recycling, offering a scalable method for fuel cell applications.
研究领域:
材料科学
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能源化学
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环境工程
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可再生能源
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氢能技术
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Hao Yu,Ce Zhang,Xin Lu
Titanium and its alloy powders are highly sensitive to oxygen, and the limited development of deoxygenation processes restricts the recycling of powders with elevated oxygen levels. In this study, we employed calcium hydride as a deoxygenating reductant and implemented a normal pressure solid-state deoxygenation technique, the in-situ reactions of Ca and H 2 generated from the decomposition of calcium hydride, along with partial gaseous CaH, effectively reduce the oxygen content in the powders. By performing the deoxygenation above the β-transition temperature, we successfully reduced the oxygen content in titanium alloy powder from 3593 ppm to 839 ppm. The deoxygenated powder retained the original appearance, size, and morphology of the initial powder, with no residual impurity elements. The thickness of the surface oxide film was reduced to 3.5 nm, and the interstitial oxygen content was lowered to 300 ppm. In comparison with the current deoxidation in solid-state process, this method significantly reduced the total process time while achieving an equivalent oxygen reduction rate.
研究领域:
材料科学
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冶金工程
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 29
·2316448
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IF 18.5
Zhihua Zhang,Yangyu Zhu,Xiaoyue Shi,Baotong Qi,Yu Ding,Yan Du,Wanfeng Shi,Jian Zhang,Jian Liu,Yuanhua Sang,Zeyan Wang,Lei Zhang,Haohai Yu,Huaijin Zhang,Bin Cai,Mingwen Zhao,Yangyang Li
Orbital degree of freedom plays a crucial role in governing the physical and chemical properties of solid materials, and it is widely investigated in the fields of physics, material science, and chemistry. Typically, orbital-energy-related scenarios, such as d-band center or electron occupancy, have been discussed in the catalytic materials, since they can control the surface-adsorbate bonding strength to modulate the catalytic activity. However, the impact of orbital morphology, that is the “posture” of orbitals on catalysts' surfaces, has never been studied. Here the importance of 3 d -orbital morphology on the activity of oxygen reduction reaction (ORR) in a strongly correlated oxide α-Ti 2 O 3 is highlighted. Superior ORR performance is observed in α-Ti 2 O 3 (Ti 3+ :3 d 1 ) than that of the anatase and rutile TiO 2 (Ti 4+ :3 d 0 ), with higher Faradaic efficiency (87.3%) and H 2 O 2 selectivity (93.2%). More importantly, a novel orbital-morphology-based mechanism is developed and the orbital morphology dominates the catalytic activity by determining the surface-adsorbates d – p orbital hybridization via orbitals' overlap, resulting in a crystal-plane-dependent ORR activity in α-Ti 2 O 3 . The work reveals the strong interplay between the orbital morphology, d – p hybridization, and ORR activity, which broadens the fundamental understanding of catalysts from a new view of the orbital degree of freedom.
研究领域:
材料科学
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化学
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物理学
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DOI
高影响因子
Journal of Materials Chemistry B
·
2024
·
IF 6.1
Junwei Yang,Xianzhen Dong,Wenying Wei,Kun Liu,Xiaopei Wu,Honglian Dai
The healing of scalded wounds faces many challenges such as chronic inflammation, oxidative stress, wound infection, and difficulties in vascular and nerve regeneration. Treating a single problem cannot effectively coordinate the complex regenerative microenvironment of scalded wounds, limiting the healing and functional recovery of the skin. Therefore, there is a need to develop a multi-effect treatment plan that can adaptively address the issues at each stage of wound healing. In this study, we propose a scheme for on-demand release of hydrogen sulfide (H2S) based on the concentration of reactive oxygen species (ROS) in the wound microenvironment. This is achieved by encapsulating peroxythiocarbamate (PTCM) in the ROS-responsive polymer poly(ethylene glycol)–poly(L-methionine) (PMet) to form nanoparticles, which are loaded into a thermosensitive injectable hydrogel, F127-poly(L-aspartic acid-N-hydroxysuccinimide) (F127-P(Asp-NHS)), to create a scald dressing. The H2S released by the hydrogel dressing on demand regulates the wound microenvironment by alleviating infection, reducing oxidative stress, and remodeling inflammation, thereby accelerating the healing of full-thickness scalded wounds. This hydrogel dressing for the adaptive release of H2S has great potential in addressing complex scalded wounds associated with infection and chronic inflammation.
研究领域:
材料科学
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生物医学工程
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伤口愈合
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药学
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Jinze Wang,Haiqi Zhang,Hongtao Hu,Sentao Hu,Lie Ma
Matrix metalloproteinase 9 (MMP-9) plays an important role in wound healing. However, overexpression of MMP-9 leads to the degradation of the newly formed extracellular matrix, which delays wound healing, ultimately leading to chronic wounds. Therefore, timely monitoring of the MMP-9 activity using simple, cost-effective methods is important to prevent the formation of chronic wounds. In this work, ferrocene-modified MMP-9 cleavage peptide (Fc-MG) modified carboxymethyl chitosan hydrogels were prepared as electrochemical biosensors. In the presence of MMP-9, the peptide chain is sheared, and the electrochemically active ferrocene segment is released. Therefore, analyzing the electrochemical activity of hydrogels using differential pulse voltammetry (DPV) can be used to determine MMP-9 activity. The results showed that the DPV peaks were correlated with the MMP-9 concentration in phosphate-buffered saline (PBS, pH 7.4) and Dulbecco's modified Eagle's medium (DMEM). Specifically, the corresponding coefficient of determination (R 2 ) were 0.918 and 0.993. The limit of detections were 73.08 ng/mL and 131.71 ng/mL, respectively. Compared with the enzyme-linked immunosorbent assay, the hydrogel biosensor determined the concentration of MMP-9 in solution with simpler steps. This study demonstrates a novel strategy based on Fc-MG-modified hydrogels to monitor MMP-9 activity in cell secretion samples and shows the potential application in chronic wounds.
研究领域:
生物医学工程
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分析化学
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伤口愈合
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生物传感器
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Ali Hammad,Fandi Ning,Siyi Zou,Yiyang Liu,Bin Tian,Can He,Zhi Chai,Qinglin Wen,Lei He,Xiaochun Zhou
Aluminum is the most abundant and promising material for hydrolytic hydrogen generation . It can be easily transported and stored. However, the oxide protective layer around Al limits its hydrolytic activity and hinders practical applications. To solve this problem, NaH is introduced to form the core-shell structure of Al-based NaH solid fuel powder by a simple hand mixing method in an open lab environment. The new core-shell structure of Al-based NaH solid fuel powder showed the best hydrolytic performance among Al-based materials and produced 98 % hydrogen yield at a 1 to 0.9 M ratio of NaH and Al in water. The hydrolytic activity consists of NaH hydrolytic splitting and Al hydrolysis. XRD and SEM analysis confirmed that NaH is the key to supporting complete Al hydrolysis and attaining maximum yield as compared to calcium hydride. Our research endorsed the practical implementation of inexpensive and transportable hydrolytic hydrogen generation materials and offered a new idea for the design of hydrolytic hydrogen generation materials for further development.
研究领域:
材料科学
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能源研究
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DOI
高影响因子
Molecular Catalysis
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2025
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IF 4.9
Huibin Liu,Wenhao Yang,Weilin Shen,Ying Zhong,Wenjun Zhu,Xiao Chen,Changhai Liang
The long-term scientific challenge and pursuit for semi-hydrogenation of alkynes to alkenes can be satisfied by regulating metal active centers or developing new catalytic materials. Herein, Al-Co x intermetallic catalysts are successfully prepared by reducing metal oxides using LiCl-CaH 2 composite molten salts, which are utilized for the semi-hydrogenation of phenylacetylene to styrene. The AlCo intermetallic catalyst with amorphous alumina encapsulation, resulting from the non-stoichiometric ratio feeding, exhibits significantly high styrene selectivity (83 %) at 99 % conversion of phenylacetylene under 100 °C and 0.3 MPa H 2 , which is much better than those of surface Co-rich samples and Co/Al 2 O 3 catalyst. The selectivity enhancement in phenylacetylene semi-hydrogenation is attributed to the alteration in the adsorption mode of styrene over AlCo intermetallic catalyst surface, which facilitates by the electron-rich and isolated Co active sites. Moreover, in hydrogenation of alkyne with different functional groups and steric hindrances, the corresponding alkene selectivity is similarly satisfactory, and the catalyst is easy to separate and has a stable structure. This work offers a valuable approach for tailoring the catalytic performance of intermetallic compounds formed by transition metal aluminides, and expanding their potential applications in efficient hydrogenation catalysts.
研究领域:
催化化学
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材料科学
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有机合成
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DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 10
·2363
·
IF 4.2
Tao Li,Mingzu Zhang,Jinlin He,Peihong Ni
Graft copolymers have unique application scenarios in the field of high-performance thermoplastic elastomers, resins and rubbers. β-myrcene (My) is a biomass monomer derived from renewable plant resources, and its homopolymer has a low glass transition temperature and high elasticity. In this work, a series of tapered copolymers P(My-co-AMS)k(k = 1, 2, 3) were first synthesized in cyclohexane by one-pot anionic polymerization of My and α-methyl styrene (AMS) using sec-BuLi as the initiator. PAMS chain would fracture when heated at high temperature and could endow the copolymer with thermal degradation property. The effect of the incorporation of AMS unit on the thermal stability and glass transition temperature of polymyrcene main chain was studied. Subsequently, the double bonds in the linear copolymers were partially epoxidized and hydroxylated into hydroxyl groups to obtain hydroxylated copolymer, which was finally used to initiate the ring-opening polymerization (ROP) of ε-caprolactone (ε-CL) to synthesize the graft copolymer with PCL as the side chain. All these copolymers before and after modifications were characterized by proton nuclear magnetic resonance (1H NMR), gel permeation chromatography (GPC), thermogravimetry analysis (TGA), and differential scanning calorimeter (DSC).
研究领域:
材料科学
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高分子化学
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Yan Qin,Zhujun Xiao,Jianning Wu,Lin Cui,Guihua Meng,Shengchao Yang,Zhiyong Liu,Xuhong Guo
At present, it is very important to develop a nanoparticle drug delivery system that can spread and retain the leaf surface of plants at the same time, which can improve the loss of pesticide carriers on the leaf surface and improve the bioavailability of pesticides. The photosensitive pesticide chlorpyrifos was loaded with halloysite nanotubes. The coating of polydopamine (PDA) provided the interface adhesion ability for the pesticide carrier, and the assembly of cationic oligomeric surfactant provided the wetting and spreading ability for the pesticide carrier. The wettability and spreadability of pesticide carrier can be adjusted by changing the length of hydrophobic chain segment, and the contact angle of cotton leaf surface can reach 36.87°. The retention rate after simulated rain erosion can reach 83.65 %. The maximum release rate was 60.76 % after 60 hours of cumulative release, which showed sustained release performance. After 24 h of simulated solar illumination, the degradation rate of chlorpyrifos (CPF) was 62.76 %. Improving the adhesion and wetting spreading ability of inorganic nanopesticide carriers on leaf surface and reducing the loss and degradation of CPF of photosensitive pesticides play a positive role in improving the bioavailability of pesticides, so it has a wide range of significance in agricultural applications and environmental protection.
研究领域:
农业科学
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环境科学
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植物保护
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Huibin Liu,Xiao Chen,Shiyao Liu,Yan Du,Wenjun Zhu,Zhengwen Hu,Marc Armbrüster,Changhai Liang
Using the low-temperature molten salt strategy, Al–Ni intermetallic compound catalysts (AlNi, Al3Ni2, and AlNi3) with efficiently separated nickel sites are successfully prepared by reducing the oxides of stoichiometric mixtures of the corresponding elements. Applying these materials as catalysts in the semihydrogenation of phenylacetylene to styrene suggests that the AlNi3-derived catalyst exhibits superior catalytic performance, achieving a remarkable styrene selectivity of 88% at a high conversion of phenylacetylene (99%). In conjunction with reaction kinetics, in situ infrared (IR) measurements, and density functional theory (DFT) calculations, the electron-rich Ni active center, created through electron transfer from Al atoms, plays a pivotal role in reducing the surface adsorption energy of styrene and thus enhancing the semihydrogenation selectivity. In addition, the magnetic AlNi3-derived catalysts exhibit excellent stability and can be easily separated by using a magnet.
研究领域:
催化化学
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材料科学
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理论计算化学
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DOI
高影响因子
BIOMACROMOLECULES
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2024
·
IF 5.5
Ling Yuan,Li Xiao,Jie Zhang,Yi Xiao,Leixiao Yu,Ke-Ke Yang,Yu-Zhong Wang
Biodegradable polymers with shape memory effects (SMEs) offer promising solutions for short-term medical interventions, facilitating minimally invasive procedures and subsequent degradation without requiring secondary surgeries. However, achieving a good balance among desirable SMEs, mechanical performance, degradation rate, and bioactivities remains a significant challenge. To address this issue, we established a strategy to develop a versatile biodegradable polyurethane (PPDO–PLC) with tunable hierarchical structures via precise chain segment control. Initial copolymerization of l-lactide and ε-caprolactone sets a tunable Tg close to body temperature, followed by block copolymerization with poly(p-dioxanone) to form a hard domain. This yields a uniform microphase-separation morphology, ensuring robust SME and facilitating the development of roughly porous surface structures in alkaline environments. Cell experiments indicate that these rough surfaces significantly enhance cellular activities, such as adhesion, proliferation, and osteogenic differentiation. Our approach provides a methodology for balancing biodegradability, SMEs, three-dimensional (3D) printability, and bioactivity in materials through hierarchical structure regulation.
研究领域:
材料科学
·
生物材料
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组织工程
·
聚合物化学
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产品关联
DOI
PubMed
高影响因子
INORGANICA CHIMICA ACTA
·
2025
·
IF 3.2
Kai Ma,Jianping Guo,Ping Chen
The development of alternative methods for sustainable dinitrogen (N 2 ) fixation to ammonia (NH 3 ) is a cutting-edge research area. The presence of external stimuli, such as non-thermal plasma, can boost the activation of the inert N 2 molecules under ambient temperatures and pressures, thereby generating value-added products such as NH 3 or other nitrogen-containing compounds. Binary alkali metal hydrides such as NaH and KH have recently shown intriguing properties in the plasma nitrogen fixation process. Herein we report the different chemical behaviors of a series of hydride composites consist of potassium hydride (KH) and alkaline earth metal hydride (MgH 2 , CaH 2 , SrH 2 , and BaH 2 ) under nitrogen plasma conditions. A nitrogen-relayed mechanism has been proposed to understand the different nitrogen fixation behaviors on these hydride composites. Under this scenario, KH is responsible for plasma N 2 fixation to form surface NH 2 species, which subsequently migrate and react with MgH 2 , CaH 2 , and SrH 2 to form N and NH species, respectively. This work enriches the plasma chemistry of metal hydrides , and provides a strategy to enhance the amounts of fixed nitrogen of single hydride material under nitrogen plasma conditions.
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高影响因子
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