INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
·
IF 8.3
Biye Niu,Feixiang Gao,Zekun Jing,Taiping Fu,Yufeng Liu,Yakun Guo,Maobing Shuai
In confined environments, hydrogen accumulation presents significant safety hazards, necessitating the development of efficient hydrogen uptake materials. Conventional Pd/C-DEB hydrogen getter is severely compromised by CO poisoning. This study introduces a one-step mechanochemical ball milling approach that integrates Pd/C catalysts with DEB to fabricate a CO-tolerant hydrogen getter. A DEB conversion rate of 75.2 % is achieved under an H 2 atmosphere containing 1 % CO, representing a sixfold improvement over the untreated sample. Ball milling refines Pd nanoparticles, increases surface area, generates multiscale defects, strengthens metal-support interactions, enhances electron transfer, modulates the Pd d-band structure, and reduces CO adsorption energy, thereby exposing more active sites for hydrogen uptake. This approach is also applicable to Pt/C, Rh/C, and other platinum-group metal systems, providing a versatile strategy for designing durable and CO-resistant getters in energy storage and conversion technologies.
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高影响因子
ACS Sensors
·
2025
·
IF 9.1
Xinhua Zhao,Xiaxia Xing,Zhenxu Li,Yi Zhang,Zhu Zhang,Tingting Wang,Dachi Yang
In the emerging ammonia (NH3) economy, both olfactory and visual sensing are desired for leakage detection, in which olfactory sensing enables a fast response and wide detection range, while visual sensing ensures high selectivity. However, little is reported on the sensing material as a mediator to synergistically combine the dual-modality NH3 sensing. Here, Co3[Co(CN)6]2 microcubes (Co–CN MCBs) mediators have been developed for olfactory and visual dual-modality NH3 sensing. In olfactory sensing, porous chitosan-decorated Co3O4/Co3[Co(CN)6]2 microcages (CS@Co–O/Co–CN MCGs) have been obtained via [Co(CN)6]3–-governed self-assembly, glycerol-assisted reduction, and Kirkendall effect-driven hollowing. Beneficially, MCGs exhibit a 1 s fast response (500 ppm) and a 0.5–10,000 ppm wide detection range at room temperature. In visual sensing, colorimetric sensing paper (CSP) incorporated with anthocyanin, Co–CN, and poly(vinyl alcohol) has been achieved, which presents 10–320 ppm visual NH3 detection through a pink-to-brown transition. Further, highly selective NH3 sensing has been acquired through machine learning-powered classification of MCGs’ response and CSP’s specific NH3 chromogenic behavior. Notably, combining dual-modality sensing has achieved desired NH3 detection due to the boosted NH3 adsorption on Co–CN MCBs’ active sites and the synergistic effect of their-mediated heterostructures. Practically, our dual-modality sensing device has been integrated to detect NH3 with reliable responses.
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
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IF 6.3
Yaqi He,Xinhua Li,Zhu Qian,ZuPeng Yan,Guizhen Shi,Xia Sun,Zongqing Ma
In this paper, we innovatively introduced Sn and B into the Nb-Al system at the same time and successfully prepared high-performance Nb 3 Al bulks through mechanical alloying and subsequent low-temperature sintering processes. The influence of different doping amounts of B in the Sn-B co-doping on the superconducting properties of Nb 3 Al superconductors was also investigated. It was found that Sn-B co-doping greatly improves the superconducting properties of Nb 3 Al, especially the J c properties, compared with the undoped sample. The optimal doping amount of Sn-B co-doping is finally determined to be 4 at% Sn-2.6 at% B. At this time, the superconducting transition temperature of Nb 3 Al is up to 16.2 K, and the critical current density reaches up to 1.3 × 10 5 A⋅cm −2 (4.2 K, 5 T), which is almost twice higher than that of Sn-doped Nb 3 Al, and one order of magnitude higher than that of general undoped Nb 3 Al. Combined with the phase composition analysis and microstructure observation, we find that with the co-doping of Sn and B, the grain size of Nb 3 Al is refined, and the diffusely distributed Nb 2 Al nanoparticles are introduced, which greatly enhance the magnetic flux pinning effect of Nb 3 Al. Secondly, the intergranular connectivity of Nb 3 Al is significantly improved. The Sn-B co-doped Nb 3 Al superconductors combine the advantages of Sn doping to enhance flux pinning and B doping to improve intergranular connectivity, which synergistically promotes the dramatic improvement of Nb 3 Al superconductivity Nb 3 Al.
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JOURNAL OF PHARMACEUTICAL SCIENCES
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2025
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IF 3.8
Ping-fu Huang,Wen-Min Niu,Lu-lu Liu,Guan-qiao Wang,Jun Chen,Zhou-xun Dong,Jia-bing Tong
Paclitaxel (PTX), categorized as a BCS Class IV anti-tumor agent, is integral to clinical treatment, however, the insolubility of PTX leads to diminished bioavailability. Resveratrol (RES), a bioactive compound present in various dietary sources, has the potential to augment the anti-tumor effectiveness of PTX. This research aims to formulate a co-amorphous system consisting of PTX and RES to enhance the solubility and bioavailability of PTX. The co-amorphous system was synthesized via the solvent evaporation technique and subsequently characterized using powder X-ray diffraction, Fourier-transform infrared spectroscopy, differential scanning calorimetry, Raman spectroscopy, and thermal analysis. Molecular dynamics simulations illustrated the interactions between PTX and RES, which facilitated an increase in apparent solubility and in vitro dissolution rates. Furthermore, in vitro cytotoxicity assays, Caco-2 cell model studies, and in vivo anti-tumor experiments demonstrated that the PTX-RES combination exhibited enhanced anti-tumor efficacy relative to other treatment groups. Pharmacokinetic evaluations revealed that the oral bioavailability of the PTX-RES complex surpassed that of pure PTX. These findings substantiate that the PTX-RES co-amorphous system significantly improves the physicochemical properties and anti-tumor activity of PTX. Additionally, this study presents a promising approach for enhancing the solubility and bioavailability of compounds with poor solubility.
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PubMed
高影响因子
Advanced Materials Interfaces
·
2019
·Vol. 7
·期 2
·1901703
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IF 4.713
Weicai Zhang,Jing Peng,Mingtao Zheng,Hanwu Dong,Hang Hu,Yong Xiao,Yingliang Liu,Yeru Liang
Assembling of well-orientated mesopores and 0D substance into an orchestrate architecture for constructing advanced carbon-based composites is highly attractive. Currently, this nanofabrication method is facing challenges, because of the difficulty in the co-assembly of the building blocks is very hard to perform onto a high-curvature and heterogeneous 0D substrate. Here, an efficient active nanointerface-assisted co-assembly approach for design and fabrication of a novel class of yolk–shell Au@ordered mesoporous carbon nanosphere is reported. The key point to this preparation strategy is construction of reactive aldehyde functional groups on the surface of Au@SiO 2 nanospheres, which can react with the carbon source to in situ form a stable covalent bond at their nanointerface. The as-synthesized yolk–shell Au@ordered mesoporous carbon nanosphere not only exhibits uniform spherical morphology and robust porosity but also possesses a totally new ordered mesoporous and fast permeable shell structure, providing a chance for greatly broadening their application scope.
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Molecular Catalysis
·
2019
·
IF 2.938
Ao Hu,Xinhuan Lu,Dongming Cai,Haijun Pan,Run Jing,Qinghua Xia,Dan Zhou,Yongde Xia
N-doped porous carbons incorporating highly-dispersed non-noble metallic cobalt (Co) nanoparticle materials were synthesized by rapid pyrolysis of a zeolitic-type metal-organic framework (ZIF-9) and their structures, morphologies, topologies and relevant physical and chemical properties were fully measured by different characterization technologies. The resulting derived Co/CN materials were further evaluated as catalysts in nitrobenzene hydrogenation. It was found that Co/CN materials showed remarkbly catalytic activity and chemoselectivity for mild hydrogenation of nitrobenzene. Amongst the studied a series of Co/CN-x (pyrolyzed at x °C) materials, sample Co@CN-800 shows the most superior catalytic activity for hydrogenation of nitrobenzene. In particular, the catalytic conversion activity of Co@CN-800 is 100% with aniline being the sole product at 70 °C for 2 h, 27.5 times higher than that of cobalt powder (Co). It is believed that the large pore size, adsorption of nitroarenes substrate with high selectivity and strong interaction of Co nanoparticles with the doped N species can result in the high activity of Co@CN-800. This work therefore offers a cost-effective approach in developing highly efficient catalytic materials towards mild hydrogenation of nitrobenzene.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
·
IF 16.683
Xueyan Chen,Honghong Wang,Min Chen,Xiaoxiao Qin,Hong He,Changbin Zhang
Ag-based catalysts are shown to be efficient for formaldehyde (HCHO) oxidation at low temperature, while the role of active Ag species in this reaction remains a controversial issue. In this work, we prepared Ag/TiO 2 catalysts with TiO 2 of different crystal structures (anatase or rutile) as supports and tested their performances in HCHO oxidation. We observed that the crystal structure of the TiO 2 support had a significant influence on the activity of the Ag/TiO 2 catalysts, and Ag/A (anatase) exhibited dramatically superior activity compared with Ag/R (rutile). More interestingly, we observed a clear inflection point in the HCHO conversion curve for the Ag/R catalyst. Combining the results of BET, XRD, TEM, XAFS, H 2 -TPR characterization and DFT calculations, we show that HCHO oxidation on Ag/TiO 2 catalysts is a co-function process of multiple active sites including surface oxygen, Ag 2 O, and metallic Ag species. The low-temperature non-renewable surface oxygen and Ag 2 O species mainly contribute to HCHO oxidation in the low-temperature range, while metallic Ag species are primarily responsible for the reaction at high temperature since metallic Ag is capable of activation of oxygen at high temperature. The relative contents of surface oxygen, Ag 2 O and metallic Ag species are different on the Ag/A and Ag/R catalysts. The dispersion degree of metallic Ag species also differs on the Ag/A and Ag/R, therefore their capacities for oxygen activation are quite dissimilar. The above factors combine to result in distinct catalytic behaviors for Ag/A and Ag/R in HCHO oxidation, as well as the appearance of an inflection point.
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2015
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IF 2.947
Yi Ding,Xirui Lu,Hong Tu,Xiaoyan Shu,Hui Dan,Shuai Zhang,Tao Duan
A series compositions with general stoichiometry as Zr 1− x − y (Nd x Ce y )SiO 4− x /2 (0 ≤ x , y ≤ 0.1) have been obtained by simultaneous substitution of Nd 3+ and Ce 4+ for Zr 4+ in ZrSiO 4 structure. The effects of Nd and Ce content on the phase evolution and microstructure of the ceramics were investigated systematically. The results show that the samples co-doped with total content of Nd 3+ ( x ) and Ce 4+ ( y ) < 0.04 are single zircon phase. However, when the compositions co-doped with total content of Nd 3+ ( x ) and Ce 4+ ( y ) ≥ 0.04 exhibit coexistence of zircon and (Nd,Ce) 2 Si 2 O 7 phase. This demonstrates that the solubility of Nd 3+ and Ce 4+ in zircon structure is around 0.04 mol per mol of zircon. In addition, it is found that the densities of the samples increase with increasing total content of Nd 3+ and Ce 4+ . These results indicate that zircon ceramics are promising candidate for the immobilization of trivalent and tetravalent actinides.
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POLYHEDRON
·
2021
·
IF 3.052
Aihong Li,Dongyang Li,Jianwei Mao,Zhimeng Ge,Jianping Guo,Bo Liu
Through a facile solvothermal method, the novel composites of cobalt(II) diphenylphosphinate/TiO 2 have been synthesized and used for photocatalytic hydrogen production in ethanol solution. The chemical composition and surface morphology were analyzed by XPS, XRD, ICP-OES, EA, IR and SEM. The composite CoTi10 showed high photocatalytic activity in H 2 evolution that the quantity is ca. 1155.86 μmol/g for 3 h in ethanol solution under the illumination of UV–visible light source, which is 12 times higher than the commercial P25. The composites also exhibited unique selectivity for converting ethanol to 1,1-diethoxyethane in the photocatalytic process. Moreover, their good stabilities were revealed in the recycling test. It is thus clear that the composite can effectively inhibit the recombination of electron-hole pairs in photocatalytic reactions and lead to the enhanced hydrogen production rate.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Le Yang,Na Wang,Bairui Tao,Fengjuan Miao,Yu Zang,Paul K. Chu
Palladium (Pd) nanoparticles in combination with naturally abundant materials are stable and highly active catalysts for hydrogen production . Herein, Co(OH) 2 nanosheet arrays are prepared hydrothermally on graphene/nickel foam (graphene/NF) to produce Co(OH) 2 /graphene/NF which provides the desirable three-dimensional (3D) substrate for subsequent Pd electrodeposition to obtain Pd/Co(OH) 2 /graphene/NF. The materials exhibit excellent durability and catalytic performance in the hydrogen evolution reaction (HER) in an alkaline environment such as a low overpotential of 124 mV at 10 mA cm −2 and Tafel slop of 53 mVdec −1 . The excellent performance is attributed to the synergistic catalytic effects rendered by the nanostructured interfaces between the Pd nanoparticles and Co(OH) 2 nanosheet arrays as well as large surface area . The technique and materials have large potential in energy conversion applications.
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高影响因子
Chem
·
2018
·
IF 14.104
Mingyang Xing,Wenjing Xu,Chencheng Dong,Yaocai Bai,Jingbin Zeng,Yi Zhou,Jinlong Zhang,Yadong Yin
Advanced oxidation processes (AOPs) are widely proposed for treating persistent pollutants by the ⋅ OH radicals generated from H 2 O 2 decomposition. However, their broad applications in practical settings have been hampered by the low efficiency of H 2 O 2 decomposition. Here, we report that metal sulfides (MoS 2 , WS 2 , Cr 2 S 3 , CoS 2 , PbS, or ZnS) can serve as excellent co-catalysts to greatly increase the efficiency of H 2 O 2 decomposition and significantly decrease the required dosage of H 2 O 2 and Fe 2+ in AOPs. Unsaturated S atoms on the surface of metal sulfides can capture protons to form H 2 S and expose metallic active sites with reductive properties to accelerate the rate-limiting step of Fe 3+ /Fe 2+ conversion. The efficiency of AOPs involving co-catalysts can be further enhanced by visible-light illumination thanks to the sensitization of organic pollutants. This discovery is expected to drive great advances in the use of AOPs for large-scale practical applications such as environmental remediation.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2017
·
IF 9.446
Xiaoqin Sun,Xiaoxiang Xu
Layered semiconductor compounds often exhibit intriguing properties for photocatalytic water splitting, probably correlated with their peculiar crystal structures that facilitate charge separations. In this work, we perform an investigation on the layered Ruddlesden-Popper compound Sr 2 TiO 4 and its La/Rh co-doped counterparts for photocatalytic hydrogen production from water. Their crystal structures, optical absorption and other physicochemical properties have been systematically explored. Our results suggest that La/Rh can be successfully incorporated into Sr 2 TiO 4 with layered crystal structure maintained. The use of polymerized-complex method for sample synthesis significantly reduces the calcination temperature as low as 900 °C. La/Rh serves as efficient dopants for extending the light absorbance of Sr 2 TiO 4 as far as 550 nm. Photocatalytic hydrogen productions are also considerably improved after La/Rh co-doping under both full range (λ ≥ 250 nm) and visible light irradiation (λ ≥ 420 nm). An optimal doping level is reached at 3% (Sr 1.97 La 0.03 Ti 0.97 Rh 0.03 O 4 ) which gives the highest average hydrogen production rate ∼100 μmol/h and ∼40 μmol/h under full range (λ ≥ 250 nm) and visible light irradiation (λ ≥ 420 nm), corresponding to apparent quantum efficiency ∼1.27% and ∼1.18%, respectively. Photoelectrochemical analysis reveals that charge separation and electron lifetime strongly depends on the level of La/Rh co-doping. Mott-Schottky analysis and theoretical calculations indicate that the improved light absorption of La/Rh co-doped Sr 2 TiO 4 stems from the formation of new valence band with Rh 4d character which uplifts the valence band edge of Sr 2 TiO 4 .
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