Materials Today Chemistry
·
2025
·
IF 6.7
Xiaotong Song,Junyuan Zhang,Weiqi Li,Huanying Li,Zhiguo Li,Xiaolong Xu,Changyu Liu,Jianbo Jia
Metal-organic framework (MOF)-derived carbon nanocomposites have been widely applied in electrocatalytic fields due to their simple synthesis, excellent conductivity, and high catalytic activity. In this study, ZIF-67 and MIL-101(Fe) were synthesized via liquid-phase precipitation and solvent thermal methods, respectively. Then, the two kinds of MOFs were ground and calcined with melamine to prepare flower-like carbon nanocomposites. Under the optimal conditions, the oxygen reduction reaction (ORR) onset potential (E onset = 1.019 V vs. reversible hydrogen electrode, RHE) and half-wave potential (E 1/2 = 0.866 V) of this prepared composite are both higher than those of commercial Pt/C catalyst (E onset = 0.971 V, E 1/2 = 0.838 V). The prepared nanocomposite exhibits a lower oxygen evolution reaction (OER) overpotential (η = 338 mV at 10 mA cm −2 ) than RuO 2 (η = 372 mV), demonstrating superior catalytic performance. The prepared nanocomposite achieves simultaneous enhancement in both ORR and OER bifunctional catalytic performances. The power density of a zinc-air battery (ZAB) assembled with the optimal nanocomposite was 2.65 times higher than that of the Pt/C + RuO 2 system. This study establishes a fundamental framework for the rational design of high-performance ORR/OER bifunctional catalysts, while pioneering new avenues for ZAB technology commercialization.
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高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2022
·Vol. 38
·期 5
·1232-1238
·
IF 2.726
Chen Weijie,Xia Huicong,Guo Kai,Jin Wangzhe,Du Yu,Yan Wenfu,Qu Gan,Zhang Jianan
Lithium-sulfur(Li-S) batteries have been puzzled by the “shuttle effect”. In the recent years, catalytic materials present a huge potential for solving this problem. However, the exploitation for catalytic activity was still challenging in Li-S batteries. In this article, we put forward a single atom catalyst (SAC) of FeN 4 coupled with Fe 3 C on the N-doped carbon (FeN 4 /Fe 3 C@NC) by one-step pyrolysis method. The FeN 4 and Fe 3 C synergistically catalyze the polysulfides conversion when the N-doped carbon provides the high conductive three-dimensional skeleton in Li-S batteries. As a result, the FeN 4 /Fe 3 C@NC shows a specific capacity of 1100 mA·h/g at 0.2 C(1 C=1675 mA/g). In addition, the FeN 4 /Fe 3 C@NC maintains 99.01% of the pristine specific capacity after 100 cycles at 0.5 C, indicating the improved electrochemical performance in Li-S batteries. This work sheds new lights on the design of engineering catalysts for developing high-performance Li-S batteries.
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高影响因子
CATALYSIS LETTERS
·
2023
·Vol. 154
·期 5
·2182-2196
·
IF 2.8
Liu Jialu,Song Zhi,Liu Boxia,Zhang Xiayan,Huang Yeqiong,Han Dongxu
Because of its high toxicity and severe degradation, phenol has caused serious environmental pollution, and it is urgent to explore a stable and efficient degradation method of phenol. In this study, Ni/Fe bimetallic atomic cluster composite catalyst activated peroxymonosulfate (PMS) to degrade phenol efficiently. The experimental results show that the phenol degradation rate can reach 100% in a wide range of pH (3–11), and the system offers good stability in repeated experiments. The free radical quenching investigation and electrochemical characterization showed that the non-free radical pathway dominated the degradation system, and a large amount of singlet oxygen and rapid electron transfer promoted the efficient degradation of phenol in wastewater. This study opens up a new way for bimetallic atom cluster catalysts to activate PMS to degrade organic pollutants. Graphical
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高影响因子
DALTON TRANSACTIONS
·
2017
·Vol. 46
·期 47
·16525-16531
·
IF 4.029
Fu-hua Wei,Ding Chen,Zhao Liang,Shuai-qi Zhao,Yun Luo
Fe-Based metal–organic frameworks (Fe-MOFs) were prepared with trimesic acid and FeSO4·7H2O via a microwave-assisted ball milling approach. The structure and thermal stability of the as-prepared Fe-MOFs were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectrometry (FTIR), X-ray photoelectron spectroscopy (XPS), and thermogravimetric analysis (TGA). When used to degrade 20 mg L−1 hexavalent chromium in aqueous solution, the Fe-MOFs were found to completely reduce a 100 mL solution within 120 min under natural light and a 400 mL solution within 90 min under Xe lamp irradiation. Under natural sunlight, 98% of the Cr(VI) was removed from a 40 mL solution after 40 min.
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CHEMICAL PAPERS
·
2024
·Vol. 78
·期 6
·3761-3772
·
IF 2.1
Chen Yufeng,Zhao Ning
Surface-enhanced Raman scattering (SERS) has been widely applied in various fields due to its high sensitivity and rapid response capability. In this paper, a MIL-101(Fe)@Ag composite SERS substrate was prepared using photoreduction method. The synthesized MIL-101(Fe)@Ag composite substrate combines the localized surface plasmon resonance properties of silver nanoparticles and the high adsorption capacity of metal–organic frameworks. MIL-101 (Fe)@Ag composite substrate was characterized by FTIR, UV and SEM. The SERS activity of the composite substrates was characterized by measuring the Raman signals of PATP. The detection limit of the substrate for PATP was 10 –8 M, with a relative standard deviation of only about 5.3%, indicating good SERS effect and reproducibility of the substrate. Finally, the prepared substrate was applied for formaldehyde detection, with a detection limit of 10 –9 M. Principal component analysis was used for quantitative analysis of formaldehyde. This work proposes a simple method for synthesizing MIL-101(Fe)@Ag composite substrates with high SERS performance and uniformity and establishes a rapid detection method for formaldehyde using this substrate, which has great application prospects.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2017
·Vol. 27
·期 37
·1702513
·
IF 12.124
Yingjie Li,Haichuan Zhang,Ming Jiang,Qian Zhang,Peilei He,Xiaoming Sun
The development of highly efficient bifunctional electrocatalysts for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is crucial for improving the efficiency of overall water splitting, but still remains challenging issue. Herein, 3D self-supported Fe-doped Ni 2 P nanosheet arrays are synthesized on Ni foam by hydrothermal method followed by in situ phosphorization, which serve as bifunctional electrocatalysts for overall water splitting. The as-synthesized (Ni 0.33 Fe 0.67 ) 2 P with moderate Fe doping shows an outstanding OER performance, which only requires an overpotential of ≈230 mV to reach 50 mA cm −2 and is more efficient than the other Fe incorporated Ni 2 P electrodes. In addition, the (Ni 0.33 Fe 0.67 ) 2 P exhibits excellent activity toward HER with a small overpotential of ≈214 mV to reach 50 mA cm −2 . Furthermore, an alkaline electrolyzer is measured using (Ni 0.33 Fe 0.67 ) 2 P electrodes as cathode and anode, respectively, which requires cell voltage of 1.49 V to reach 10 mA cm −2 as well as shows excellent stability with good nanoarray construction. Such good performance is attributed to the high intrinsic activity and superaerophobic surface property.
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高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Qihao Li,Xin Wang,Chenzhao Liu,Xinwei Yang,Cheng Li,Lichao Jia,Jian Li
Reduced Ce 0.9 Ni 0.1 O 2-δ consists of Ni nanoparticles and Ni-doped CeO 2 (CNO), named (Ni@CNO) with Ni nanoparticles uniformly distributed on CNO substrate with high oxygen vacancy concentration and good water absorption capability. Thus Ni@CNO demonstrates moderate catalytic activity and high carbon deposition resistance during CH 4 steam-reforming. When it is infiltrated into Ni 0.9 Fe 0.1 (NF) metallic support for metal-supported solid oxide fuel cells (MS-SOFCs), forming a continuous coating, Ni@CNO offers CH 4 steam-reforming activity additional to that of the NF support with increased H 2 /CH 4 ratio (3.38 at 600 °C) in the reforming gas, enhanced carbon deposition resistance, and prolonged performance durability. With the Ni@CNO-infiltrated NF support (NFNC), Ni/Ce 0.9 Gd 0.1 O 2-δ (Ni-GDC) function anode, GDC electrolyte, and La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ /Ce 0.9 Gd 0.1 O 2-δ (LSCF-GDC) cathode, the MS-SOFC cell directly fueled by wet CH 4 (3 vol% H 2 O) exhibits a peak power density of 0.343 W cm −2 and the cell voltage durably maintains above 0.6 V at 400 mA cm −2 during a test of 280 h at 600 °C without noticeable carbon deposition in the support and the functional anode. Such performance is comparable to and higher than those reported, suggesting that NFNC is a promising option for direct-CH 4 MS-SOFCs.
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2025
·
IF 11.3
Hongyan Wei,Shoushu Wei,Qingze Chen,Yixuan Yang,Xun Liu,Shiqin Long,Jing Liu,Jianxi Zhu,Runliang Zhu
Metastable ferrihydrite nanoparticles and clay minerals always coexist as heteroaggregates in nature due to their abundance, opposite charge, and large interface energy. However, the impact of clay minerals on the transformation of ferrihydrite under anoxic conditions remains elusive. This study systematically investigated the effect of distinct clay minerals on the Fe(II)-catalyzed transformation of ferrihydrite and clarifying the underlying nanoscale mechanisms for the first time. Our results demonstrated that clay minerals could affect the production and recrystallization of labile Fe(III) (an active Fe(III) intermediate species formed by oxidation of Fe(II) at the ferrihydrite surface) by dispersing ferrihydrite aggregates. This modulation led to different transformation rates, higher crystallinity of formed lepidocrocite, and enhanced goethite formation in the heteroaggregates. Importantly, montmorillonite can accommodate Fe(II) and labile Fe(III) within its interlayer spaces, which further led to the inhibited crystallization of Fe(II) to magnetite and long-term preservation of labile Fe(III). Additionally, clay minerals served as templates for forming dendritic goethite and hexagonal magnetite nanoplates. Our findings provide new insights into the complicated roles of clay minerals in controlling the ferrihydrite transformation and other iron (oxyhydr)oxides formation, which is significant for predicting the bioavailability of iron and the fate of other coexisting contaminants.
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PubMed
高影响因子
Science China-Materials
·
2026
·
IF 7.7
Zhang Yingzhen,Han Shibo,Huang Jianying,Cai Weilong,Ng Yun Hau,Chen I-Wen Peter,Lai Yuekun
The practical deployment of alkaline water electrolysis (AWE) is fundamentally limited by the instability of oxygen evolution reaction (OER) catalysts caused by continuous dissolution of active metal sites under harsh operating conditions. Herein, we report a strategy for stabilizing NiFe layered double hydroxides (NiFe-LDH) via weak Brönsted base intercalation, which tunes the interlayer spacing and interfacial electronic structure. Through the intercalation of weakly basic nitrate anions (NO 3 − ), a nitrate-modified NiFe-LDH (NiFe-NO 3 ) is constructed, which effectively suppresses Fe dissolution by stabilizing high-valence Ni/Fe species during operation. As a result, NiFe-NO 3 exhibits exceptional durability, maintaining stable operation at 1000 mA cm −2 in 30 wt% KOH at 80 °C for over 500 h with an ultralow degradation rate of 0.04 mV·h −1 (retention rate of electrochemical activity was 99.1%), representing a ∼12-fold lifetime improvement over pristine NiFe-LDH. Mechanistic studies reveal that NO 3 − intercalation induces synergistic effects including slight interlayer expansion, electronic redistribution, and regulation of interlayer Brönsted basicity, which collectively stabilize high-valence Ni/Fe species and preserve the oxyhydroxide active phase during OER. This work demonstrates that Brönsted base intercalation provides an effective strategy to suppress active-site dissolution and offers new insights for the design of durable OER catalysts for industrial alkaline water electrolysis (AWE).
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 19
·1512
·
IF 3.2
Jiang Chaojin,Zhang Yuanyuan,Guan Erbu,Jiang Yuqin,Li Shuaishuai,Xin Yanmei
The development of efficient and economical photocatalysts is the focus of achieving sustainable remediation of water pollution. However, slow photogenerated carrier transfer and insufficient catalytic sites are the main reasons affecting photocatalytic applications. Herein, we developed flake-octahedral BiOBr/MIL-101(Fe) heterojunction catalysts through a facile solvothermal strategy for the degradation of pollutants under visible light irradiation. Scanning electron microscope, X-ray photoelectron spectrometer, Fourier infrared spectrometer, and X-ray diffraction analysis characterizations proved the successful synthesis of flake-octahedral BiOBr/MIL-101(Fe) heterojunction. Absorption spectra and Brunauer–Emmett–Teller analyses showed that the BiOBr/MIL-101(Fe) composites with an atomic percentage of Fe of 9.1 (denoted as BiOBr/MIL III ) had the optimal light absorption and the largest specific surface area. The BiOBr/MIL III achieved a remarkable Rhodamine B (Rh B) degradation efficiency of 94.5% within 60 min, with an apparent rate constant ( k ) of 0.03540 min −1 , demonstrating excellent visible light-driven photocatalytic activity. Photocatalytic mechanistic studies showed that the solvothermal-induced flake-octahedral BiOBr/MIL-101(Fe) III heterojunction promotes the formation of Z-scheme, which significantly enhances the carrier separation efficiency and accelerates the rapid generation of reactive radicals · O 2 − and h + . This work provides a feasible strategy for the construction of flake-octahedral inorganic-MIL photocatalysts with excellent photocatalytic performance.
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高影响因子
CHEMISTRY OF MATERIALS
·
2026
·
IF 7.1
Juan Wen,Fang Wang,Jingyuan Li,Yujie Wen,Xiaoli Xia,Zhonghan Feng,Zhengting Zhang,Xiaokang Ke,Wei Li,Sheng Tang,Luming Peng
Regulating the local coordination environment of active sites is an effective strategy to enhance the intrinsic activity of layered double hydroxides (LDHs) for the oxygen evolution reaction (OER). Here we report a controlled postsynthesis Fe incorporation approach that uses NiAl-LDH as a structurally robust host to construct NiAl(a)-Fe(e)-LDH with distorted local Fe coordination environments through alkali treatment and ultrasonic assistance. The resulting catalyst exhibits superior OER performance compared to counterparts with similar Fe content, highlighting the critical role of Fe coordination. Solid-state NMR and X-ray absorption fine structure reveal that ultrasonic-assisted Fe incorporation induces Fe–O lattice distortion and modifies the local electronic states of Fe. Density functional theory calculations show that these distorted environments upshift the d-band center and lower the *OOH formation energy barrier, thereby accelerating OER kinetics. This work establishes a direct correlation between local Fe coordination, electronic structure, and catalytic activity and provides a general strategy for active-site engineering in LDH-based OER electrocatalysts.
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高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2026
·Vol. 28
·期 6
·165
·
IF 3.5
Yang Menghui,Gao Zhen,Zhan Haoyu,Bi Mengqi,Huang Naibao,Zhang Junjie,Gan Ziqi,Wang Hao
Developing highly active, durable, and cost-effective oxygen reduction reaction (ORR) catalysts is crucial for fuel cell commercialization through the use of non-precious metal alternatives to platinum. In this study, the tunable dodecahedral Fe-N-C catalysts were synthesized through controlled pyrolysis of Fe-doped zeolite imidazolate framework-8 (ZIF-8) precursors. The optimized 5% Fe@NC-8 catalyst demonstrates excellent ORR performance with an onset potential of 0.92 V vs. RHE, a half-wave potential (E 1/2 ) of 0.83 V vs. RHE, and a limiting diffusion current density (j d ) of 6.06 mA cm −2 , surpassing commercial 20% Pt/C catalysts (onset potential 0.89 V vs. RHE; E 1/2 0.81 V vs. RHE; j d 4.27 mA cm −2 ). It also shows strong durability, retaining 86.16% of its current after prolonged polarization (@0.80 V vs. RHE for 10,000 s) and minimal negative shift in half-wave potential after extensive cycling(@200 mV s −1 for 5000 CV cycles). The enhanced catalytic performance is attributed to (i) possessing a high specific surface area (319 m 2 g −1 ) and favorable porosity to maximize active site accessibility; (ii) having abundant active sites of Fe-N x , graphitic N, and pyridinic N as active catalytic centers; and (iii) forming N-doped carbon matrices to provide a conductive framework. These advantages boost the density of accessible active sites and thus remarkably improve the ORR catalytic activity.
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