FUEL
·
2025
·
IF 7.5
Xudong Leng,Luxuan Huang,Yongjin Sun,Xuekun Jin,Fengjuan Chen,Haiming Duan,Biaobing Cao
Platinum-based alloy catalysts have achieved notable progress in oxygen reduction due to their unique electronic structures, but conventional alloying often causes nanoparticle agglomeration and sintering. Here, PtM (M = Fe, Co, Ni) alloys are synthesized using XC-72R carbon black as support. PtFe nanoparticles (∼3.1 nm) are uniformly dispersed and exhibit strong electronic interactions, optimizing the Pt electronic structure. The Pt 2 Fe 1 /C catalyst delivers a half-wave potential of 0.849 V, with mass and specific activities 1.57 and 3.31 times higher than commercial Pt/C, retaining 94.4 % activity over 9 h. It also exhibits excellent hydrogen evolution performance, requiring only 36 mV overpotential at 10 mA cm −2 . Density functional theory indicates that alloying downshifts the Pt d-band center, reducing *OH adsorption energy and enhancing catalytic activity. This work demonstrates a synthesis strategy for stable Pt alloys with superior bifunctional performance in both oxygen reduction and hydrogen evolution reactions.
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产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2025
·
IF 4.6
Huiping Wu,Hui Sun,Bin Yu,Afang Gao,Gaoyuan Chen,Xinyu Liu,Shijie Wang,Yutong Feng
Recently, the rapid growth of the textile, printing, and dyeing industries has led to severe pollution from dye wastewater. Bimetallic metal-organic frameworks (bimetallic MOFs) have emerged as promising adsorbents for dyes removal. Herein, Fe-HKUST-1 with an octahedral structure was anchored on the surface of viscose spunlaced nonwoven material (VSN) via an in situ solvothermal method to prepare Fe-HKUST-1@VSN. After carbonization, Fe-HKUST-1@VSNC was obtained for the adsorption of organic dyes in water. When the carbonization temperature is no more than 240 ο C, the morphologies and structures of Fe-HKUST-1@VSNC are not changed. And the adsorption efficiencies and capacities of Fe-HKUST-1@VSNC-240 for Congo red (CR) and crystal violet (CV) are the optimal. At an initial dye concentration of 10 mg L −1 , a temperature of 35 °C, and pH 7, Fe-HKUST-1@VSNC-240 shows its highest performance, reaching 98.17 % removal of CV in 90 min and 98.65 % removal of CR in 120 min. The adsorption processes of Fe-HKUST-1@VSNC-240 for both CV and CR are slightly affected by coexisting ions. The adsorption efficiency of Fe-HKUST-1@VSNC-240 for CV and CR declines to 50.10 % (after 6 cycles) and 56.76 % (after 22 cycles), respectively. Moreover, Fe-HKUST-1@VSNC-240 also demonstrates good adsorption performance in real water environment. The adsorption processes of Fe-HKUST-1@VSNC-240 for both CV and CR are endothermic, spontaneous, and monolayer adsorption, primarily through chemical adsorption and intra-particle diffusion. The synthesized Fe-HKUST-1@VSNC-240 can adsorb various organic dyes, along with excellent structural stability and recyclability, offering a promising solution for dye-contaminated wastewater remediation.
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产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Xiaoyu Jia,Chenxu Zhang,Yongcai Zhang,Enren Zhang
In this study, Fe/N/Cs oxygen reduction reaction (ORR) catalysts with high specific surface area, catalytic activity were synthesized using legume biomass with different protein content. The catalytic activity of the Fe/N/C catalysts was confirmed to be related to the protein content of the biomass precursor by characterization and electrochemical tests. The catalysts (named as Fe/N/C-T) from lactone tofu have the highest N/C ratio related to ORR, and the air-cathode loaded with Fe/N/C-T catalysts exhibited the best ORR performance in linear sweep voltammetry (LSV) tests, which was comparable to that of commercial Pt/C catalysts. MFCs with AC(Fe/N/C-T) air-cathode produced a maximum power density of 0.486 mW cm −2 , higher than Pt/C (0.437 mW cm −2 ) with the same loading. In addition, the Fe/N/C-T catalyst demonstrated high stability and resistance to toxicity in long-term operation, which can be an alternative to commercial Pt/C.
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DOI
高影响因子
GREEN CHEMISTRY
·
2017
·Vol. 19
·期 8
·1895-1903
·
IF 9.125
Yongxiang Zhai,Chuang Li,Guangyue Xu,Yanfu Ma,Xiaohao Liu,Ying Zhang
Lignin primarily composed of methoxylated phenylpropanoid subunits is an abundant biomass that can be used to produce aromatics. Herein, a series of non-precious bimetallic Ni–Fe/AC catalysts were prepared for efficiently depolymerizing lignin. When organosolv birch lignin was used to determine the efficiency of the catalysts in methanol solvent, the Ni1–Fe1/AC (the ratio of Ni and Fe was 1 : 1) achieved the highest total yield of monomers (23.2 wt%, mainly propylguaiacol and propylsyringol) at 225 °C under 2 MPa H2 for 6 h. From GPC analysis, it is also proved that lignin was efficiently depolymerized. The Ni–Fe alloy structure was formed according to XRD, HRTEM, H2-TPR and XPS characterization. Based on the model compounds’ tests, the Ni1–Fe1/AC catalyst showed high efficiency in ether bond cleavage without hydrogenation of aromatic rings which could be attributed to the synergistic effect of Ni and Fe on the alloy structure. The total yield of monomers by using the Ni1–Fe1/AC catalyst reached 39.5 wt% (88% selectivity to PG and PS) when birch wood sawdust was used as the substrate.
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DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 5
·2943-2952
·
IF 3.108
Jia Yang,Xiaojun Niu,Shaorong An,Weiyi Chen,Jie Wang,Wei Liu
A novel Bi2MoO6–MIL-100(Fe) heterostructure photocatalyst was synthesized by a facile solvothermal method for the first time, and characterized by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, UV-vis diffuse reflectance spectra, transmission electron microscopy, and photoluminescence spectra. The as-prepared Bi2MoO6–MIL-100(Fe) composites exhibited excellent photocatalytic activity and stability towards the degradation of Rhodamine B (RhB) under visible light irradiation. The introduction of MIL-100(Fe) into semiconductor Bi2MoO6 improved the photocatalytic performance remarkably, and the optimal composite with 9% MIL-100(Fe) content showed the highest photocatalytic activity. According to the active radical trapping experiments, the h+ and ˙O2− radicals were the two main active species in the photocatalytic reaction. The enhanced photocatalytic performance is mainly attributed to the formation of the Bi2MoO6–MIL-100(Fe) heterostructure, which is beneficial to the transfer and separation of photo-generated electron–hole pairs. The possible mechanism of the enhanced photocatalytic performance of the Bi2MoO6–MIL-100(Fe) composites was discussed.
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DOI
高影响因子
FUEL
·
2019
·
IF 5.128
Xiaowei Bai,Jian Li,Chenxi Jia,Jingai Shao,Qing Yang,Yingquan Chen,Haiping Yang,Xianhua Wang,Hanping Chen
In this study, a new-type of Na/Fe solid acid catalyst was synthesized to achieve efficient conversion of cellulose into furfural. The influence of Na/Fe mass ratios (0.05–2%), pyrolysis temperature (350–750 °C), and catalyst to cellulose ratio (0.2:1–20:1) was investigated through pyrolysis–gas chromatography/mass spectrometry (Py-GC/MS), and the structure of Na/Fe catalyst was characterized with various approaches. Through scanning electron microscopy (SEM), the morphologies of the catalysts were found to exhibit rod-like, prismatic, spherical, and amorphous shapes with increasing Na/Fe. The results indicated that the selectivity of furfural increased with increasing Na/Fe ratio, and reached the highest value (61.4%) at a Na/Fe ratio of 1.42, after which it decreased with further increases in the Na/Fe ratio. Higher temperature and higher catalyst to biomass ratio are favorable for furfural formation, but exceedingly high temperature and catalyst to biomass ratio inhibit its formation. The maximum furfural yield could be achieved at 550 °C and catalyst to cellulose ratio of 10. The proposed catalytic pathway of cellulose pyrolysis for furfural is the promotion of the conversion of glucose monomers into dehydrated sugars such as LGO and DGP, which undergo secondary cracking to form furfural.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Liwei Chen,Xu Zuo,Liang Zhou,Yang Huang,Shengjiong Yang,Tianming Cai,Dahu Ding
The contamination issue caused by the antibiotics is now a big challenge due to its great potential hazardous to the human beings. Herein, three Co/Fe bimetallic oxides were synthesized for the activation of peroxymonosulfate (PMS) to degrade norfloxacin. The elemental analysis results confirmed the stoichiometric ratio of Fe/Co was 1.02, 2.03, and 6.65 (CoFe 2 O 4 ·CoO x , CoFe 2 O 4 , Co 0.4 Fe 2.6 O 4 ), respectively. The normalized pseudo-first-order kinetic rate constant ( k app ) of Co 0.4 Fe 2.6 O 4 was 0.18 L/(m 2 ·min), which was over 10 times higher than those of CoFe 2 O 4 ·CoO x (0.010 L/(m 2 ·min)) and CoFe 2 O 4 (0.012 L/(m 2 ·min)). The degradation process would be further accelerated under weak basic condition (pH = 8.5). The enhanced surface hydroxyl groups were found to be the probable reason for the higher efficiency through the XPS analysis. Moreover, the sulfate radical rather than hydroxyl radical dominated the degradation process in the developed Co 0.4 Fe 2.6 O 4 /PMS system. Overall, the magnetic Co/Fe bimetallic oxide catalyst prepared in this study could be served as a high-quality candidate for the catalytic oxidation of refractory organic pollutants.
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DOI
高影响因子
Science Advances
·
2024
·Vol. 10
·期 15
·
IF 11.7
Kerong Chen,Anwei Zhou,Xinyuan Zhou,Jielei He,Yurui Xu,Xinghai Ning
Disruptions in metal balance can trigger a synergistic interplay of cuproptosis and ferroptosis, offering promising solutions to enduring challenges in oncology. Here, we have engineered a Cellular Trojan Horse, named MetaCell, which uses live neutrophils to stably internalize thermosensitive liposomal bimetallic Fe-Cu MOFs (Lip@Fe-Cu-MOFs). MetaCell can instigate cuproptosis and ferroptosis, thereby enhancing treatment efficacy. Mirroring the characteristics of neutrophils, MetaCell can evade the immune system and not only infiltrate tumors but also respond to inflammation by releasing therapeutic components, thereby surmounting traditional treatment barriers. Notably, Lip@Fe-Cu-MOFs demonstrate notable photothermal effects, inciting a targeted release of Fe-Cu-MOFs within cancer cells and amplifying the synergistic action of cuproptosis and ferroptosis. MetaCell has demonstrated promising treatment outcomes in tumor-bearing mice, effectively eliminating solid tumors and forestalling recurrence, leading to extended survival. This research provides great insights into the complex interplay between copper and iron homeostasis in malignancies, potentially paving the way for innovative approaches in cancer treatment.
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DOI
PubMed
高影响因子
WATER RESEARCH
·
2020
·
IF 9.13
Panxin Wang,Xu He,Wei Zhang,Jun Ma,Jin Jiang,Zhuangsong Huang,Haijun Cheng,Suyan Pang,Yang Zhou,Xuedong Zhai
As a common animal feed additive, p-arsanilic acid (p-AsA) is thought to be excreted with little uptake and unchanged chemical structure, threatening the environment by potentially releasing more toxic inorganic arsenic. We herein investigated the removal of arsenic by in situ formed ferric (oxyhydr)oxides with the promotion of p-AsA degradation in Fe(II)/peroxydisulfate (PDS) system. Results showed that under acid conditions, p-AsA degraded very quickly and over 99% of p-AsA (5 μM) was degraded within 10 min at the optimal dosage of Fe(II) (100 μM) and PDS (150 μM) at pH 3, while less than 66.4% of arsenic was removed at pH 3–5. Higher pH (3–7) would inhibit the degradation of p-AsA but promote the arsenic removal. At pH 6–7, over 98.5% of total arsenic was removed, while the degradation efficiency of p-AsA was lower than 52.4%. HPLC-ICP-MS results indicated that the arsenic group was cleaved from p-AsA in the form of As(III) and then rapidly oxidized to As(V). FTIR and XPS analysis indicated that both As(V) products and residual p-AsA were bonded to ferric (oxyhydr)oxides via hydroxyl groups. Common cations (e.g., Na + , Ca 2+ , Mg 2+ ) and anions such as Cl − , SO 4 2− , CO 3 2− had no significant influence on arsenic removal, while SiO 3 2− , PO 4 3− and HA inhibited the removal of total arsenic, mainly by affecting the zeta potential of iron particles. In summary, the Fe(II)/PDS process, as an efficient method for partial oxidation and simultaneous adsorption of p-AsA under near-neutral conditions, is expected to control the potential environmental risks of p-AsA.
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 31
·14756-14771
·
IF 4.682
Cai Menglu,Wang Xiaozhong,Cao Wenhui,Chen Yingqi,Dai Liyan
A fine-tuned mordenite was prepared to overcome the low selectivity of tert-amyl anthracene production in the direct alkylation of anthracene. Herein, a series of boric acid-modified Fe-Zr mordenite materials were prepared, and tert-amyl anthracene was smoothly and efficiently obtained over these catalysts. The boron sites in modified catalyst promoted the alcohol dehydrogenation, which benefited the reaction conversion. Moreover, the existence of Brønsted and Lewis acid sites was the key in alkylation reaction, making 1.0B-Fe-Zr/MOR good reactivity (Conv. 47.8%, Sel. 91.4%). Calculated results correlated the products properties with catalyst structures, verifying that boric acid-modified Fe-Zr/MOR was a successful shape-selective catalyst. The present work opens a new frontier for a sustainable and high-selective method to process anthracene alkylation. Graphical abstract
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DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2017
·Vol. 23
·期 58
·14597-14603
·
IF 5.317
Xinghua Chen,Fei He,Yanfei Shen,Yiran Yang,Hao Mei,Songqin Liu,Toshiyuki Mori,Yuanjian Zhang
Graphical Interface effect : A study into the intrinsic role of carbon supports for Fe-N/C alternatives to Pt/C catalysts for oxygen reduction in fuel cells revealed that when immobilized on suitable support, the Fe−N/C demonstrated an improved mass J K that was comparable to that of Pt/C and higher than most reported M−N/C catalysts (see scheme). The mass kinetic current density (mass J K ) of most extensively reported M−N/C catalysts (M represents non-precious metal elements such as Fe, Co, and Cu), a potential alternative to noble metal catalysts in fuel cells, is poorer than that of commercial Pt/C. Thus, deep understanding of the intrinsic roles of carbon supports may contribute to the development of M−N/C catalysts from a practical point of view. Herein, the routinely used carbon supports, i.e. carbon black (CB) and carbon nanotubes (CNT) that have different morphology and crystallinity, were investigated to uncover the factors that affected the mass J K of Fe−N/C in electrocatalytic oxygen reduction. When immobilized on CB, the ionic liquids-derived Fe−N/C exhibited an enhanced mass J K (4.45 A g −1 at 0.80 V vs. RHE) by a factor of 2.14 times, comparable to that of Pt/C (5.79 A g −1 ) and higher than most reported M−N/C catalysts to our best knowledge. In contrast, the CNT support system showed no improvement. It was revealed that a compatible interface between the Fe−N/C precursors and the carbon supports was vital to ensure in-situ growth of a uniform catalyst layer on the supports during pyrolysis. This subsequently promotes the mass J K by exposing more embedded active sites and introducing favorable slit pores for effective mass-diffusion. This work would be promising to address the long-term overlooked challenge of the low mass J K of M−N/C catalysts in replacing noble-metal catalysts for practical fuel cell applications.
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DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2020
·
IF 0
Cederick Cyril Amoo,Mingquan Li,Aqsa Noreen,Yajie Fu,Elton Maturura,Ce Du,Ruiqin Yang,Xinhua Gao,Chuang Xing,Noritatsu Tsubaki
Keen interest is taken in zeolite-encapsulated metal nanoparticles (NPs) owing to their excellent performance and ultrastability in heterogeneous catalysis. Herein, we propose a simple and efficient method to contain Fe NPs within zeolite Y microcrystals. First, a low-pressure technique was developed to successfully synthesize the zeolite Y microcrystals. The technique was then invoked, using Fe NPs fixed in nanosized C spheres as a precursor, to prepare zeolite Y-embedded Fe composite catalysts. The C spheres served as a template that restricted Fe NP growth within zeolite Y. Above all, the successful confinement of small Fe NPs within the microcrystals of zeolite Y enhanced the catalyst activity with 36.2% selectivity for light olefins (C2–C4=) at a CO conversion of 91.2% during evaluation in Fischer–Tropsch synthesis. The techniques presented in this work open up a new avenue worth exploiting for the synthesis of nano/microcrystalline materials and highly active metal–zeolite composites in heterogeneous catalysis.
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