APPLIED CATALYSIS B-ENVIRONMENTAL
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2017
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IF 9.446
Dongting Yue,Xufang Qian,Miao Kan,Meng Ren,Yao Zhu,Lele Jiang,Yixin Zhao
Binary transition metals layered double hydroxides (LDH) such as [NiFe] have been developed as the promising low cost and high performance electrocatalysts for hydrogen evolution. However their applications as co-catalysts in photocatalysis like CdTe/CdS quantum dots (QDs) for hydrogen evolution are limited by their ineffective contact with QDs nanoparticles. We report on the synthesis of the sulfurated [NiFe]-LDH (FeNiS) nanoparticles via the sulfurizing treatment of [NiFe]-based LDH. The sulfurizing treatment can successfully break the 2D [NiFe]-LDH into FeNiS nanoparticles by replacing the OH group via the S group. FeNiS nanoparticles provide more bonding sites for CdTe/CdS QDs due to the sulfur species formed on the FeNiS nanoparticles. The junction between sulfur species and Cd 2+ of CdTe/CdS QDs could facilitate electrons transfer between CdTe/CdS QDs and FeNiS nanoparticles and then significantly enhance their photocatalytic hydrogen production. The photocatalytic activity of FeNiS-CdTe/CdS is much better than [NiFe]-CdTe/CdS QDs and Pt-CdTe/CdS QDs. In all, this novel FeNiS nanoparticles would be a promising low cost co-catalyst for energy and environmental photocatalysis.
研究领域:
材料科学
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能源化学
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环境科学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Ning Deng,Huichao Zhu,Zhiheng Fan,Changjin Guo,Jie Hu,Xin Huang
Phosphate recovery presents an effective solution to address the conflicting problems of phosphorus pollution and scarcity. However, recovering organic phosphates, such as 1-hydroxyethane 1,1-diphosphonic acid (HEDP), is comparatively complex, which involves multiple processes. Herein, we developed an innovative all-in-one solution to simplify these processes by combining NiFe-layered double hydroxides (NiFe-LDH) and peroxydisulfate (PDS). This combination achieved approximately 90 % conversion of HEDP to orthophosphate, with 100 % of the resulting orthophosphate recovered in 120 min. The exceptional performance in simultaneous HEDP degradation and recovery can be attributed to dual roles of Ni and Fe in NiFe-LDH/PDS. The polyvalent Ni functions as an electron shutter (Ni 2+ ⇋ Ni 3+ ⇋ Ni 2+ ) in the redox cycles between PDS and HEDP, accounting for effective HEDP degradation. The high complexation stability between Fe(Ⅲ) and orthophosphate (log K = 9.92) allows Fe(Ⅲ) to serve as binding sites for orthophosphate recovery. Moreover, NiFe-LDH/PDS effectively treats HEDP across wide pH ranges (3–––10), which can be ascribed to pH buffers originating from protonation/deprotonation in NiFe-LDH layers. The recovered phosphorus with NiFe-LDH exhibited a slow-release property under soil water solution without notable Ni release, which highlighted its potential usage as a slow-release fertilizer. These features—catalytic and binding sites, and high compatibility—allow NiFe-LDH to achieve concurrent degradation and recovery of organic phosphate in a single solution.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
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2024
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IF 10.7
Zi-Ye Liu,Qian-Yu Wang,Teng Xu,Ji-Ming Hu
Nickel–iron layered double hydroxide (NiFe LDH) shows great performance in the oxygen evolution reaction (OER) due to the interaction between Ni and Fe. However, such an interaction still remains insufficient to achieve lower overpotential. To address this, we employ conjugated polycarboxylate ligands to promote electron transfer between Ni and Fe in NiFe LDH. This results in the formation of high-valence Ni in NiFe LDH, and also strengthens the adsorption of O intermediates at Ni sites. In this study, oxalate and 1,3,5-benzenetricarboxylate (BTC) are used to modify NiFe LDH, synthesized via the gas–solid reaction method and the decomposition of MIL-100(Fe) method, respectively. Oxalate-modified NiFe LDH has a low overpotential of 238 mV and Tafel slope of 38.1 mV dec−1, while BTC-modified NiFe LDH is 230 mV and 36.1 mV dec−1. In addition, both of them can work stably for over 24 h at a current density of 100 mA cm−2. The conjugated polycarboxylate ligand modification method is a new strategy to promote the OER performance and extend long-term stability of NiFe LDH.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Yuchun Ren,Jiayun Song,Shengjun Sun,Zixiao Li,Chaoxin Yang,Zhengwei Cai,Min Zhang,Meng Yue,Hefeng Wang,Dongdong Zheng,Yanqin Lv,Xuping Sun,Bo Tang
Seawater electrolysis, benefiting from the closeness to coastal areas, is recognized as a promising alternative for hydrogen (H 2 ) production to replace conventional technologies. However, the effectiveness of this method is limited by anode catalysts that exhibit high energy consumption and short lifespans due to chloride-induced chemical corrosion. Herein, we propose a hierarchical Ni phosphate@NiFe layered double hydroxide on Ni foam (NiPO x @NiFe LDH/NF) towards alkaline seawater oxidation (ASO). In terms of its unique hierarchical structure, NiPO x @NiFe LDH/NF delivers an industrial current density reaching up to 1 A cm −2 with 352 mV overpotential. Electrochemical experiments and in situ characterizations reveal that self-released PO 4 3− can act as a robust barrier for chloride ions adsorption through strong electrostatic repulsion, promoting unstable activity phase NiOOH drive at 1 A cm −2 for 600 h, farther than NiFe LDH/NF (75 h). Moreover, the honeycomb-like NiFe LDH shell facilitates the rapid and uniform release of O 2 bubbles, which enhances the mechanical stability of the electrode during long-term ASO. In general, this work offers valuable potential for designing an advanced anodic electrode with remarkable electrochemical performance and superior anti-corrosion for ASO.
研究领域:
材料科学
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电化学
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可再生能源
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产品关联
DOI
PubMed
高影响因子
MOLECULES
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2023
·Vol. 28
·期 21
·7289
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IF 4.6
Zhuo Chen,Qiang Qu,Xinsheng Li,Katam Srinivas,Yuanfu Chen,Mingqiang Zhu
The oxygen evolution reaction (OER) is a key half-reaction in electrocatalytic water splitting. Large-scale water electrolysis is hampered by commercial noble-metal-based OER electrocatalysts owing to their high cost. To address these issues, we present a facile, one-pot, room-temperature co-precipitation approach to quickly synthesize carbon-nanotube-interconnected amorphous NiFe-layered double hydroxides (NiFe-LDH@CNT) as cost-effective, efficient, and stable OER electrocatalysts. The hybrid catalyst NiFe-LDH@CNT delivered outstanding OER activity with a low onset overpotential of 255 mV and a small Tafel slope of 51.36 mV dec−1, as well as outstanding long-term stability. The high catalytic capability of NiFe-LDH@CNT is associated with the synergistic effects of its room-temperature synthesized amorphous structure, bi-metallic modulation, and conductive CNT skeleton. The room-temperature synthesis can not only offer economic feasibility, but can also allow amorphous NiFe-LDH to be obtained without crystalline boundaries, facilitating long-term stability during the OER process. The bi-metallic nature of NiFe-LDH guarantees a modified electronic structure, providing additional catalytic sites. Simultaneously, the highly conductive CNT network fosters a nanoporous structure, facilitating electron transfer and O2release and enriching catalytic sites. This study introduces an innovative approach to purposefully design nanoarchitecture and easily synthesize amorphous transition-metal-based OER catalysts, ensuring their cost effectiveness, production efficiency, and long-term stability.Keywords:room-temperature synthesis;layered double hydroxides;carbon nanotubes;NiFe-LDH@CNT;oxygen evolution reaction
研究领域:
材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2025
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IF 3.9
Fu Xingyu,Chang Shufang,Sun Xiaoqin
Photocatalysis-peroxymonosulfate (PMS) activation system is regarded as a promising strategy for antibiotic degradation. Herein, a type-II SnS 2 /NiFe LDH heterojunction assembled by nanosheets was constructed to realize the dual modulation of photogenerated carrier directional migration and PMS activation sites. The intimate and large coupled interface facilitated the charge separation and transfer. And the optimization of the electronic structure in the heterojunction enabled good visible light absorption capacity. Benefiting from the construction of type-II heterojunction, the Fe 2+ /Fe 3+ and Ni 2+ /Ni 3+ redox cycles in SnS 2 /NiFe LDH had been greatly improved, which further promoted the PMS activation. The constructed heterojunction achieved excellent metronidazole (MNZ) degradation performance (93.9% removal within 30 min) via PMS activation-assisted photocatalysis under visible light irradiation, which was greatly enhanced compared to the control conditions of photocatalysis without PMS (3.5%) or without light irradiation (78.1%). It also demonstrated excellent stability and functioned well across a wide pH range (3–11). The quenching experiments revealed that ·OH and h + were the main reactive species for MNZ oxidation. The mechanism analysis further confirmed that the transfer of photogenerated carriers was consistent with the type-II mode. This study is expected to provide new insights into design and application of type-II heterojunction in PMS activation for efficient wastewater treatment. Graphical abstract
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Daoxin Liu,Yang Yang,Jianan Zhang,Lumeng Wang,Ziwen Ma,Li Ren,Jiaqi Wang,Bing Xue,Fangfei Li
The electrochemical oxygen evolution reaction (OER) is a fundamental anodic semi-reaction used in the hydrogen energy industry. Herein, we report a novel NiFe-layered double hydroxide (NiFe-LDH)-based hybrid catalyst for the OER, which is promoted by the two-step hydrothermal loading of carbon sphere (CS) onto NiFe-LDH sheets, named as NiFe-LDH@CS. The effects of hydrothermal carbonization (HTC) parameters (such as hydrothermal time and glucose concentration) and the loading ratio of CSs on NiFe-LDH@CS were investigated. The results showed that the two-step hydrothermal synthesis significantly inhibited the interference of the carbonized substances on the lattice formation of NiFe-LDH and successfully achieved a firm combination. By adjusting the HTC process, the surface characteristics and graphitization degree of the carbonized microspheres can be effectively controlled, leading to increased OER performance of NiFe-LDH@CS. Thus, under the optimal process parameters (5 h, 0.6 M, and 5 mL), NiFe-LDH@CS exhibited an excellent overpotential of 292 mV at 50 mA cm -2 and 372 mV at 100 mA cm -2 for the OER. The outstanding OER performance of NiFe-LDH@CS is attributed to the excellent morphology control of the composite, abundant functional groups, and suitable graphitization degree of the hydrothermally carbonized CS, as well as the synergistic effect between the CSs and NiFe-LDH.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
ACS Applied Energy Materials
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2018
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IF 0
Qianqian Zhou,Ting-Ting Li,Jinjie Qian,Wei Xu,Yue Hu,Yue-Qing Zheng
Recently, extensive efforts have been focused on CuO materials as the non-noble metal electrocatalysts for the oxygen evolution reaction (OER). However, their catalytic efficiency is still far from meeting the need of practical large-scale water splitting because of poor electrical conductivity and limited exposed active sites. Herein, we report that amorphous NiFe layered double hydroxide film can be grown on CuO nanorod arrays supported on Cu foil (NiFe-LDH/CuO NRs/CF) to construct a core–shell heterostructure via a facile electrochemical deposition approach. The resulting core–shell heterostructure demonstrates excellent OER performance in 1 M KOH, only requiring a small overpotential of 290 mV to drive the current density of 50 mV cm–2 with a low Tafel slope of 60 mV dec–1, and maintaining a steady current density of 50 mA cm–2 for at least 35 h with negligible decline in catalytic activity, which is the best OER performance among reported CuO electrocatalysts to date. Remarkably, this catalytic performance is also superior to that of the state-of-the-art IrO2 catalyst. The prominent catalytic performance of NiFe-LDH/CuO NRs could be attributed to the synergistic effect between NiFe-LDH film and CuO NRs. As a result, our research indicates that the construction of amorphous heterostructures could be a promising strategy for development of efficient OER systems.
研究领域:
材料科学
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电化学
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产品关联
DOI
ACS Nano
·
2023
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IF 17.1
Chen Qiao,Zahid Usman,Jie Wei,Lin Gan,Jianhua Hou,Yingying Hao,Youqi Zhu,Jiatao Zhang,Chuanbao Cao
A catalyst kinetics optimization strategy based on tuning active site intermediates adsorption is proposed. Construction of the M-OOH on the catalytic site before the rate-determining step (RDS) is considered a central issue in the strategy, which can optimize the overall catalytic kinetics by avoiding competition from other reaction intermediates on the active site. Herein, the kinetic energy barrier of the O–O coupling for as-prepared sulfated Co-NiFe-LDH nanosheets is significantly reduced, resulting in the formation of M-OOH on the active site at low overpotential, which is directly confirmed by in situ Raman and charge transfer fitting results. Moreover, catalysts constructed from active sites of highly efficient intermediates make a reliable model for studying the mechanism of the OER in proton transfer restriction. In weakly alkaline environments, a sequential proton–electron transfer (SPET) mechanism replaces the concerted proton–electron transfer (CPET) mechanism, and the proton transfer step becomes the RDS; high-speed consumption of reaction intermediates (M-OOH) induces sulfated Co-NiFe-LDH to exhibit excellent kinetics.
研究领域:
催化化学
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材料科学
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电化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Jie Liu,Kaiyu Li,Shizhen Gao,Guohua Wu,Jing Fan
Efficient photocatalytic CO 2 reduction is limited by rapid carrier recombination and sluggish interfacial kinetics. Here, NiFe-LDH/ZnCdS (ZCS) heterostructures were fabricated by hydrothermal synthesis followed by electrostatic self-assembly. Mott–Schottky analysis, XPS, photoelectrochemical measurements, and density functional theory calculations collectively reveal staggered band alignment and interfacial charge redistribution, supporting a type-II charge-transfer pathway with improved carrier separation. The optimized 15NiFe-LDH/ZCS produced CO, CH 4 , C 2 H 4 , and C 2 H 6 at 16.54, 8.30, 1.22, and 4.70 μmol g −1 h −1 , respectively, while maintaining stable activity over 16 h. The enhancement originates from intimate interfacial contact, stronger visible-light harvesting, faster charge transport, and increased accessible active sites. These results establish a practical heterostructure-design strategy for multi-electron photocatalytic CO 2 conversion.
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产品关联
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2024
·Vol. 53
·期 6
·2826-2832
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IF 2.2
Nan Jue,Liao Haiyang,Ye Beirong
The quest for electrocatalysts that are both stable and efficient for seawater oxidation is intriguing yet presents significant challenges. Herein, we present a hierarchical NiFe-LDH@CoP core–shell array on carbon cloth (NiFe-LDH@CoP/CC) for efficient oxygen evolution reaction (OER) in an alkaline seawater electrolyte. The NiFe-LDH@CoP/CC array exhibits remarkably low overpotential of 251 mV to achieve current density of 500 mA cm −2 . Moreover, it features a modest Tafel slope of 24.9 mV dec −1 . Importantly, this electrocatalyst sustains its robust stability during continuous electrolysis for 300 h at 500 mA cm −2 . The outstanding performance and unique hierarchical structure of the NiFe-LDH@CoP/CC array provides innovative insights for the development of efficient electrocatalysts tailored for seawater oxidation applications.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
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2022
·Vol. 24
·期 1
·504
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IF 6.208
Zhilan Du,Dashuang Wang,Xinfang Zhang,Zhiyu Yi,Jihai Tang,Pingan Yang,Rui Cai,Shuang Yi,Jinsong Rao,Yuxin Zhang
In this work, a novel core-shell structure material, NiFe layered double hydroxide (NiFe LDH) loaded on SiO2microspheres (SiO2@NiFe LDH), was synthesized by a one-step hydrothermal method, and the spontaneous electrostatic self-assembly process. The morphology, structure, and microwave absorption properties of SiO2@NiFe LDH nanocomposites with different NiFe element ratios were systematically investigated. The results show that the sample of SiO2@NiFe LDH-3 nanocomposite has excellent microwave absorption properties. It exhibits broadband effective absorption bandwidth (RL < −10 dB) of 8.24 GHz (from 9.76 GHz to 18.0 GHz) and the reflection loss is −53.78 dB at the matched thickness of 6.95 mm. It is expected that this SiO2@NiFe-LDH core-shell structural material can be used as a promising non-precious, metal-based material microwave absorber to eliminate electromagnetic wave contamination.Keywords:SiO2microspheres;LDH;microwave absorption;core-shell structure
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）