CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Ting Li,Xiaomeng Wang,Yanmei Chen,Jianru Liang,Lixiang Zhou
Heterogeneous Fenton has become a promising economical and environmentally-friendly method for water treatment, however, the production of abundant radical resources (e.g., O 2 − , OH) are oftentimes limited by finite Fe 2+ species to activate H 2 O 2 . Therefore, development of a new iron-bearing solid modified with diverse functional groups for generating a large of radicals in heterogeneous Fenton is significance. Here, we constructed a Fe 3 O 4 -modified schwertmannite (Fe 3 O 4 /Sch) catalyst to activate H 2 O 2 , SO 4 2− and O 2 to produce three kinds of radicals in heterogeneous Fenton reaction. Specifically, Fe 3 O 4 /Sch catalyst was synthesized to improve its surface properties such as the contents of surface Fe 2+ species as H 2 O 2 or O 2 activators to produce OH or O 2 − , the SO 4 2− of Sch surface as SO 4 − precursor, and electron transfer between Fe 3+ and Fe 2+ . Degradation rate of ciprofloxacin (CIP) for 6 min was up to 97% in Fe 3 O 4 /Sch-H 2 O 2 system, which was higher than that in Sch-H 2 O 2 or Fe 3 O 4 -H 2 O 2 . After four successive cyclic experiments, degradation rate of CIP was still achieved 97% within 10 min in Fe 3 O 4 /Sch-H 2 O 2 system. The formation pathways of the relevant active radicals and the degradation pathways of CIP were also proposed by theoretically calculated and LC-MS data. This finding has not only developed an efficient heterogeneous Fenton catalyst, but also given a new idea of SO 4 − generation by modified iron oxyhydroxysulfate mineral for application of heterogeneous Fenton technology.
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高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Jie Ding,Xiaoxuan Yuan,Jinfeng Wang,Wenfeng Mao,Jianzhong Huo,Jingbo Zhang
Metal-Organic Frameworks (MOFs) have attracted much attention due to its large specific surface, flexible porosity and unsaturated coordination bonds. Cathodic deposition is a unique in-situ potential-driven synthesis method for the deposition of thin film MOFs; however, the gradually consumption of reactants during cathodic deposition might lead to unstable and uncontrollable reaction during thin-film MOF deposition. Herein, oxygen is selected as the initial reactant for the formation of OH − , which can result in gradually and successive formation of thin-film MAF-66 (Metal azolate framework-66), and the particle size and film thickness of the MAF-66 film can be easily tuned by the deposition time. Furthermore, the cathodic deposited thin-film MAF-66 show good adsorption property for heavy metal ions , with Cd 2+ as a representative species. The adsorption capacity can reach 32.3 mg/g (removal ratio: 69%) and the deposited MAF-66 film can achieve a satisfactory recovery degree with structural and morphological stability. In this way, a novel, environmental-friendly, and controllable cathode deposition method is developed for preparation of thin-film MAF-66, which also show great promise as a candidate for heavy metal ions adsorbent.
研究领域:
材料科学
·
环境科学
·
化学工程
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Rongjing Jia,Shuling Chang,Ruirui Wang,Yanhong Xu,Rijie Wang,Lihong Zhang
The electrocatalytic CO 2 reduction reaction to CO (ECO 2 RR) is an effective way to achieve carbon resource utilization. It requires catalysts that can synergistically couple CO 2 activation with efficient CO desorption. This work engineers this synergy by constructing an interfacial Ag δ+ -O-Zn configuration on Zn(OH)F-derived supports via controlled Ag loading (0–5 wt%). The optimal catalyst (3A/Z, 3 wt% Ag) balances the formation of interfacial, oxidized Ag species (Ag δ+ ) with well-dispersed metallic Ag 0 nanoparticles. It achieves a CO Faradaic efficiency of 95.4% at −1.15 V vs. RHE and maintains 86% efficiency over 5 h at 6.38 mA cm −2 . In-situ ATR-SEIRAS spectra and kinetics reveal that Ag δ+ -related sites lower the barrier for *COOH formation, while adjacent Ag 0 domains facilitate *CO desorption. Excessive loading (5A/Z) promotes Ag aggregation and support decomposition, diminishing the critical Ag δ+ -O-Zn interface and performance. This study highlights interface coordination engineering as a key strategy for designing bifunctional ECO 2 RR catalysts.
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高影响因子
NANO
·
2024
·
IF 1
Junxiang Mo,Jun Li,Jing Li,Yashan Li
The development of composite materials is a key area of research for enhancing the electrochemical performance of electrode materials. In this study, NiCo–S nanostructured hybrid electrode materials were prepared on nickel foam (NF) by using binary metal–organic frameworks (MOFs) as the sacrificial template through a two-step hydrothermal method. Ni–MOF was then deposited on the surface of NiCo–S/NF through the hydrothermal method and subsequently converted into Ni(OH) 2 through a subsequent alkalization treatment. The duration of the Ni–MOF hydrothermal process was varied as a parameter. NiCo–S@Ni–MOF/NF was prepared through hydrothermal reaction for 6 h, 9 h and 12 h, followed by heating in a 6 M KOH solution at 75 ∘ C for 6 h in a water bath. The electrode materials with the best morphology and electrochemical properties were obtained when the hydrothermal reaction time was 6 h. The optimized electrode had a specific capacity of 2533.2 F ⋅ g − 1 at 1 A ⋅ g − 1 and a capacity retention rate of 60.8% at 10 A ⋅ g − 1 , which indicated good rate performance. Additionally, the electrode material demonstrated excellent cycling stability, with a capacity retention rate of 95.3% after 5000 cycles at 50 mV ⋅ s − 1 . The energy density of the hybrid supercapacitor device assembled from this electrode material was 33.5 Wh ⋅ kg − 1 when the power density was 849.89 W ⋅ kg − 1 at a current density of 1 A ⋅ g − 1 .
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Journal of Physical Chemistry C
·
2019
·
IF 4.309
Xueyang Song,Li Huang,Wenxue He,Chengyong Liu,Fengchun Hu,Yong Jiang,Zhihu Sun,Shiqiang Wei
Electronic metal–support interactions (EMSIs) have opened a new way to tailor the electronic and catalytic properties of supported catalysts. Herein, we demonstrate the EMSIs between Pt nanoparticles and Co(OH)2 flakes grown on SiO2 and show its beneficial effect on enhancing the CO oxidation activity. The EMSI characteristics of the Pt–Co(OH)2/SiO2 catalyst are identified by in situ X-ray absorption fine structure (XAFS) spectroscopy, in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), and transmission electron microscopy. Quantitative XAFS analysis reveals the presence of metallic-like Pt–Co bonds. The formation of Pt–Co intermetallic bonds allows for electron donation form Co to Pt, leading to the negative charging of the Pt atoms as evidenced by reduced Pt 2p-to-5d electron-transition intensity detected by XAFS spectroscopy and the emergence of a CO adsorption band at 2063 cm–1 in DRIFTS. The significance of EMSIs is manifested by comparing the CO oxidation activity over the Pt–Co(OH)2/SiO2 and Pt/SiO2 catalysts with similar Pt loadings. Pt–Co(OH)2/SiO2 is superior to Pt/SiO2 in both the apparent activation energy (19 vs 64 kJ/mol) and the turnover frequency (0.03 vs 0.003 s–1 at 37 °C). The enhanced activity is attributed to the negative charging of Pt, which downshifts the d-band center and reduces the CO adsorption strength.
研究领域:
催化化学
·
材料科学
·
纳米技术
·
表面化学
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高影响因子
ChemElectroChem
·
2023
·Vol. 10
·期 16
·e202300184
·
IF 4
Yang Su,Hai-Lin Ren,Shuai Zhao,Ping-Ping Sun,Jia-Qi Li,Xiao-Min Wang
In this paper, [Ni 0.9 Co 0.1 ](OH) 2 precursor is used to dope H 3 BO 3 to synthesize positive electrode material when mixing lithium in wet method, and to explore the best doping by testing the microscopic morphology and electrochemical performance of the positive electrode material amount and calcination temperature. After doping with B, the microstructure of the material is improved, and the primary crystal grains are oriented and agglomerated into a needle shape. This good crystal structure can slow down the generation of grain microcracks and mechanical fracture, and improve the cycle stability of the positive electrode material. After doping B, the discharge specific capacity was slightly improved. When the calcination temperature is 750 °C and the doping amount of B is 1.0 mol%, the first discharge specific capacity reaches 223 mAh g −1 . More importantly, the capacity retention rate of the battery after 100 cycles has been greatly improved, from 74 % without doping B to 87 %. Graphical Li-ion Batteries : The B-doping improves the microstructure of the material, and the primary grains are oriented and agglomerated into a long needle shape. This good crystal structure can slow down the generation of grain microcracks and mechanical breakage, and improve the cycling stability of the cathode material.
研究领域:
材料科学
·
电化学
·
储能
·
电池技术
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高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2017
·Vol. 85
·期 2
·349-355
·
IF 1.575
Shi Min,Li Yanhong,Wang Li,Li Jing,Wang Meiri,Cui Hongtao
Abstract In this work, a facile material synthesis step-free strategy for the cost-effective assembly of Ni(OH) 2 -based electrodes was reported. The Ni(OH) 2 /MWCNTs composite electrodes for application in supercapacitors were assembled through the in-situ reaction of NiCl 2 ·6H 2 O in nickel foam as current collector with alkaline electrolyte. The characterization results indicated that NiCl 2 ·6H 2 O as raw material in electrode underwent the phase transformation from NiCl 2 ·6H 2 O to β-Ni(OH) 2 in electrolyte solution. The produced β-Ni(OH) 2 presented the same phase and same sheet morphology with thin thickness before and after electrochemical measurement. Based on the results of electrochemical measurement, 20 wt% was determined as the optimum content of MWCNTs for the assembly of electrodes. The as-assembled electrode with optimized content of MWCNTs exhibited high specific capacitance of 2001.4 F g −1 at current density of 3.2 A g −1 . This electrochemical performance of electrode could be attributed to the 2D flexible sheet morphology of Ni(OH) 2 and the improvement of electric conductivity by MWCNTs. Graphical abstract
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米技术
·
表面工程
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Nano Research
·
2024
·Vol. 17
·期 6
·4898-4907
·
IF 9.5
Geng Jing,Ji Sihan
Electrocatalytic nitrate ( \({\rm{N}}{{\rm{O}}_3}^ -\) ) reduction to ammonia (NH 3 ) offers a viable approach for sustainable NH 3 production and environmental denitrification. Copper (Cu) possesses a distinctive electronic structure, which can augment the reaction kinetics of \({\rm{N}}{{\rm{O}}_3}^ -\) and impede hydrogen evolution reaction (HER), rendering it a promising contender for the electrosynthesis of NH 3 from \({\rm{N}}{{\rm{O}}_3}^ -\) . Nevertheless, the role of Cu 2 O in copper-based catalysts still requires further investigation for a more comprehensive understanding. Herein, the Cu 2 O/Cu(OH) 2 heterostructures are successfully fabricated through liquid laser irradiation using CuO nanoparticles as a precursor. Experimental and theoretical researches reveal that Cu 2 O/Cu(OH) 2 heterostructure exhibits enhanced electrocatalytic performance for \({\rm{N}}{{\rm{O}}_3}^ -\) to NH 3 because Cu(OH) 2 promotes electron transfer and reduces the valence state of Cu active site in Cu 2 O. At −0.6 V (vs. reversible hydrogen electrode (RHE)), the NH 3 yield reaches its maximum at 1630.66 ± 29.72 \({\rm{\mu g}} \cdot {{\rm{h}}^{ - 1}} \cdot {\rm{m}}{{\rm{g}}_{{\rm{cat}}}}^{ - 1}\) , while the maximum of Faraday efficiency (FE) is 76.95% ± 5.51%. This study expands the technical scope of copper-based catalyst preparation and enhances the understanding of the electrocatalytic mechanism of \({\rm{N}}{{\rm{O}}_3}^ -\) to NH 3 .
研究领域:
电化学
·
催化
·
环境科学
·
纳米材料
·
能量转换
·
表面化学
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Xiangyang Gao,Xin Liu,Chenxi Zhou,Qiyan Wang,Ruya Guo
Tailoring efficient bifunctional electrocatalyst with dual-heterojunction is crucial for overall water splitting (OWS). Herein, a multicomponent bifunctional catalyst with dual-heterojunction is rapidly constructed via sequential electrodeposition for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Density functional theory (DFT) calculations reveal that bidirectional electron transfer at the interface induces a double built-in electric field (BIEF) in Pt/CeO 2 -Ni(OH) 2 , which offers additional impetus for electron transport and brings the d -band center closer to the Fermi level, thereby optimizing reaction kinetics and the adsorption of reaction intermediates. Active Pt and CeO 2 nanoparticles (NPs) are uniformly anchored on the stable Ni(OH) 2 nanoflocs, ensuring high exposure of active sites and preventing NPs aggregation. Meanwhile, Ni(OH) 2 , serving as abundant electron donor center, forms dual heterointerface with Pt and CeO 2 (Pt-Ni(OH) 2 and CeO 2 -Ni(OH) 2 ), which ensures structural stability during electrochemical processes. Benefiting from the dual-heterojunction and the unique structure design, Pt/CeO 2 -Ni(OH) 2 exhibits excellent electrocatalytic performance, requiring only 66 mV (10 mA cm −2 ) and 278 mV (100 mA cm −2 ) for HER and OER, respectively. Remarkably, the two-electrode electrolyzer based on Pt/CeO 2 -Ni(OH) 2 electrode requires only 1.49 V to deliver 10 mA cm −2 with an excellent durability for OWS. This work brings light to the rational design and directional construction of bifunctional electrocatalyst hybrid nanomaterials with multiple heterojunctions.
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2026
·Vol. 60
·期 32
·22965-22976
·
IF 12.2
Cheng Dong,Ma Runhao,Tan Yuansen,Wu Zhongkuan,Ding Haoran,Wu Fan,Chen Si,Wang Huaqing,Lou Guangyu,Ma Yingying,Wang Binbin,He Feng
Oxygenation
of mackinawite (FeS) at redox interfaces
constitutes
a key biogeochemical process that generates hydroxyl radicals ( • OH) and facilitates contaminant attenuation. However,
the influence of common inorganic ligands such as tripolyphosphate
(TPP) on interfacial electron transfer in this process remains poorly
understood. Herein, 1.0 mM TPP increased cumulative • OH production approximately 23.5-fold over 180 min of FeS oxygenation,
with the electron utilization efficiency for • OH
production increasing from 0.33% to 8.18%. TPP enhanced • OH generation by promoting Fe(II) dissolution, thereby driving homogeneous
Fenton-like reactions, while facilitating Fe(III)/Fe(II) redox cycling
through solid–liquid interactions. Additionally, TPP acted
as an interfacial coordination modulator by rearranging the local
Fe(II) environment, and the resulting surface Fe(II)-TPP complexes
improved the utilization of structural electrons. Electrochemical
measurements and DFT calculations indicated that this interfacial
coordination suppressed structural Fe(II) oxidation and reduced unproductive
electron consumption, while lowering the energy barrier for H 2 O 2 -forming O 2 activation at TPP-modified
FeS sites. XRD, FTIR, and EXAFS analyses showed that TPP adsorption
inhibited lepidocrocite crystallization and redirected secondary mineral
evolution toward ferrihydrite-rich products. These findings elucidate
how ubiquitous ligands regulate mineral-water interfacial processes
and • OH generation, providing a basis for optimizing
FeS-based environmental remediation technologies.
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PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Yang Wang,Cuilian Sun,Tianxing Wu,Xiujing Xing,Wei Xiong,Hao Li
The electrocatalytic nitrite reduction reaction (NO 2 RR) converts harmful nitrite in aqueous media into high value-added ammonia (NH 3 ) under mild conditions, representing a promising technology that integrates environmental remediation and green NH 3 synthesis. However, the NO 2 RR undergoes a complex process involving multi-electron/proton transfer steps. Cu-based catalytic systems are universally plagued by the inherent bottleneck of insufficient activity and selectivity, and these dual constraints can hardly be simultaneously overcome by single-element doping alone. Herein, we fabricated fluoride and cobalt co-doped Cu 2 (OH) 2 CO 3 nanosheet catalysts via a one-step hydrothermal method, where the synergistic effect between anionic and cationic dopants enables the simultaneous tailoring of the electronic structure and active site distribution of the material. Electrochemical test results demonstrate that F and Co co-doping can significantly boost the NO 2 RR catalytic performance of Cu 2 (OH) 2 CO 3 . The optimal F-3 sample achieves the highest NH 3 Faradaic efficiency (FE) of 96.47% with an NH 3 yield rate of 28.55 mg h −1 mg cat -1 at −0.8 V (vs. RHE) in 0.15 M NaNO 2 neutral electrolyte, showing a nearly 2-fold performance improvement over the undoped counterpart and outperforming most reported non-noble metal NO 2 RR electrocatalysts. This work provides a high-performance NO 2 RR electrocatalyst for neutral aqueous systems, and demonstrates that anion-cation synergistic doping can break the intrinsic performance bottleneck of Cu-based hydroxyl compounds, offering a valuable modification strategy for rational catalyst design towards electrocatalytic nitrogen-containing pollutant conversion.
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高影响因子
Nature Communications
·
2026
·
IF 18.1
An Yechen,Mei Liang,Yang Ruijie,Cui Jun,Zhang Wenhai,Han Jing-Long,Jiang Wenli,Ren Ruiyun,Gao Xiaoxu,He Zhihui,Xu Haoran,Yan Ruifeng,An Quan-Fu,Li Zhiling,Cheng Haoyi,Tao Yu,Wang Aijie,Zeng Zhiyuan
Membrane-based separation offers a sustainable route for resource recovery from high-salinity organic wastewater, yet graphene oxide (GO) membranes remain constrained by poor selectivity, limited solvent stability, and challenges in scale-up. Here, we report a hydroxylated single-walled carbon nanotube (SWCNT-OH) reinforced GO membrane, in which SWCNT-OH promotes robust inorganic crosslinking with sodium tetraborate (Na 2 B 4 O 7 ) to form rapid transport channels for water and ions, while suppressing organic passage. This architecture enhances the moxifloxacin (MXF)/NaCl separation factor more than fivefold (from 4.2 to 22.2) and increases water permeability over fourfold (from 7.2 to 30.1 l m −2 h −1 bar −1 ). The membrane was scaled up to 11 m 2 and deployed for continuous treatment of MXF crystallization mother liquor over seven days, delivering a stable recovery of 10 kg MXF per day under industrially relevant conditions. These findings establish a scalable strategy for the design of robust nanocarbon-based membranes, advancing resource-efficient treatment of high-salinity wastewater.
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高影响因子
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