INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2022
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IF 7.139
Muhammad Rauf,Liulian Pi,Jingwen Wang,Hongwei Mi,Qianling Zhang,Peixin Zhang,Xiangzhong Ren,Yongliang Li
Transition metals sulfide-based nanomaterials have recently received significant attention as a promising cathode electrode for the oxygen evolution reaction (OER) due to their easily tunable electronic, chemical, and physical properties. However, the poor electrical conductivity of metal-sulfide materials impedes their practical application in energy devices. Herein, firstly nano-sized crystals of cobalt-based zeolitic-imidazolate framework (Co-ZIF) arrays were fabricated on nickel-form (NF) as the sacrificial template by a facile solution method to enhance the electrical conductivity of the electrocatalyst . Then, the Co 3 S 4 /NiS@NF heterostructured arrays were synthesized by a simple hydrothermal route. The Co-ZIFs derived Co 3 S 4 nanosheets are grown successfully on NiS nanorods during the hydrothermal sulfurization process. The bimetallic sulfide-based Co 3 S 4 /NiS@NF-12 electrocatalyst demonstrated a very low overpotential of 119 mV at 10 mA cm −2 for OER, which is much lower than that of mono-metal sulfide NiS@NF (201 mV) and ruthenium-oxide (RuO 2 ) on NF (440 mV) electrocatalysts. Furthermore, the Co 3 S 4 /NiS@NF-12 electrocatalyst showed high stability during cyclic voltammetry and chronoamperometry measurements. This research work offers an effective strategy for fabricating high-performance non-precious OER electrocatalysts.
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高影响因子
Materials Today Energy
·
2022
·
IF 9.257
Juan Wen,Haodong Sun,Qi Zhou,Zaichun Liu,Ting Huang,Xi Chen,Xiaoyan Yang,Qinghong Huang,Yuhui Chen,Yuping Wu
Ammonia as a chemical substance is closely related to our daily life, and its production process has attracted researchers' attention. Due to its high energy consumption and high emission characteristics, the industrial Haber−Bosch process obviously cannot adapt to the sustainable development concept of low-carbon and environmental protection in today's society. The electrocatalytic nitrogen reduction reaction (NRR) technology is a promising method of converting unstable electrical energy into fuel for storage at ambient conditions. Here, a bimetallic catalyst, Co–Ni–S/Ni foam, is reported as an electrocatalyst to realize N 2 reduction. The in-situ growth strategy promotes the effective combination of Co 9 S 8 and Ni 3 S 2 on the Ni foam without any adhesive. The active centers of the bimetallic Co and Ni reasonably regulate the adsorption of various complex intermediates in the N 2 activation process, so that the Co–Ni–S/Ni foam has good N 2 activity. In 0.1 M Na 2 SO 4 , the designed electrocatalyst achieved an NH 3 yield of 5.05 × 10 −10 mol s −1 cm −2 at −0.6 V vs. RHE and an optimum Faradaic efficiency of 6.23% with good electrochemical stability and selectivity. Besides, the electrocatalytic sites were also evaluated in conjunction with density functional theory.
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高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 14
·6795-6803
·
IF 11.301
Lang Pei,Jiasong Zhong,Taozhu Li,Wangfeng Bai,Shiting Wu,Yongjun Yuan,Yifan Chen,Zhengtao Yu,Shicheng Yan,Zhigang Zou
Developing a highly efficient and low-cost oxygen-evolution-reaction (OER) electrocatalyst is an important route to overcome the rate-determining step of water splitting. Here, we directly grew a CoS2 nanoarray core with an N-doped graphitic carbon (NGC) shell on Ni foam (NF) to construct a core–shell nanorod array electrode, CoS2@NGC@NF. The CoS2 core with a high work function (∼5.5 eV) tends to capture electrons from the NGC layer (4.5–5.2 eV) to induce an electron-poor NGC shell with a significant downshift of the carbon Fermi level, facilitating the adsorption of O-containing intermediates and affording decreased activation energy during the OER process. As a result, the three-dimensional NGC encapsulated CoS2 array assembly exhibited excellent electrocatalytic OER activity with a low overpotential of 243 mV at a current density of 10 mA cm−2 and a small Tafel slope of 71 mV dec−1 in 1.0 M KOH. Our findings may suggest that manipulating the interface energetics by the work function difference is a potential route to the design of high-performance OER electrocatalysts.
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高影响因子
JOURNAL OF POWER SOURCES
·
2014
·
IF 5.211
Xuefei Gong,J.P. Cheng,Fu Liu,Li Zhang,Xiaobin Zhang
Nickel–Cobalt hydroxide microspheres are electrodepositioned on the films of NiCo 2 O 4 nanowires grown on the current collector through a facile approach and the hierarchical structures are then investigated as an electrode material for high-performance supercapacitors . Owing to the superior electrical conductivity of NiCo 2 O 4 nanowires, the porous structure of the (Ni–Co)(OH) 2 microspheres and the synergic effect of the multi-components, the electrode can deliver a high areal capacitance of 6 F cm −2 and a corresponding specific capacitance of 1132 F g −1 at a current density of 2 mA cm −2 , as well as a good rate capability (61.8% capacitance retention from 2 mA cm −2 to 50 mA cm −2 ), and excellent cycling stability (90% capacitance retention after 2000 cycles). The results suggest that our research opens up the possibility for the fabrication of high-performance energy-storage devices of binder-free electrodes.
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高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Yunxu Yang,Xiaoxi Huang,Yong Shen Chua,Hooi Ling Lee
Fe–SnO 2 @NiO–NF removed 96.85% CIP within 150 min under solar light. • S-scheme heterojunction promotes charge separation and photocatalytic activity. • 3D NiO–NF support enables easy recovery and abundant active sites. • Over 94% degradation activity was retained after four cycles. • DFT and HPLC–MS reveal charge transfer and CIP degradation pathways. Photocatalysis is effective for antibiotic degradation but limited by poor charge separation and difficult recovery of powder catalysts. In this work, a macroscopic p–n heterojunction photocatalyst (Fe–SnO 2 @NiO–NF) was prepared on pre-oxidized nickel foam through in situ growth and microwave-assisted synthesis. XRD confirmed the coexistence of SnO 2 and NiO phases, while HRTEM and XPS analyses verified the successful construction of the Fe–SnO 2 /NiO heterojunction with intimate interfacial contact and interfacial electronic interaction. UV–vis DRS, PL, TRPL, EIS, and photoelectrochemical measurements demonstrated markedly improved light absorption, charge separation and transfer behavior, with a narrowed band gap of 2.92 eV and a prolonged average carrier lifetime of 1.2226 ns. Owing to the enhanced charge separation and the conductive 3D NiO–NF framework, Fe–SnO 2 @NiO–NF exhibited significantly improved photocatalytic activity for ciprofloxacin degradation under solar irradiation, reaching 96.85% removal within 150 min, while the immobilized catalyst could be readily separated from the aqueous solution. ESR and scavenging test identified •O 2 – and h + as the main reactive species, with •O 2 – playing the dominant role, while HPLC–MS revealed the degradation intermediates and pathways. Band structure analysis and DFT calculations demonstrated that the p–n heterojunction follows an S-scheme charge transfer mechanism, promoting efficient charge separation while preserving strong redox capability. The composite retained over 94% of its initial activity after four cycles, showing excellent stability and recyclability. This study provides a practical way to develop efficient and reusable photocatalysts for antibiotic wastewater treatment. Download: Download high-res image (182KB) Download: Download full-size image
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Hongliang Fu,Qiaowei Wang,Shaocong Zhan,Guanjie Xue,Yue Lian,Yongfeng Hu,Jing Zhao,Huaihao Zhang
The rational design of electrocatalysts with high catalytic activity and outstanding corrosion resistance is of great significance for achieving water/seawater oxidation. In this work, a three-dimensional microrod C, N-FeNbO 4 /NF was successfully synthesized for the first time via hydrothermal approach integrated with in-situ strategy to construct more 001 crystal planes. Specifically, fluoride ions (F − ) coordinate with Fe/Nb and selectively adsorb onto FeNbO 4 (001) crystal plane. During liquid-phase nucleation process, the oxide further crystallizes along z-axis into microrod. Furthermore, the abundant C and N sources from solutions are incorporated into FeNbO 4 lattice by in-situ doping, thus significantly enhancing intrinsic electrical conductivity and catalytic activity. Meanwhile, the C, N-FeNbO 4 deposits on largely conductive nickel foam (NF), offering water/seawater oxidation under high current density. According to density functional theory (DFT) calculations, the model of in-situ constructed C, N-FeNbO 4 (001) crystal plane displays large carrier concentration and more mobile electrons. In-situ infrared spectroscopy suggests that C, N-FeNbO 4 /NF hosts multiple types of catalytic active sites, and confirms oxygen evolution reaction (OER) progress by adsorption evolution mechanism. From in-situ differential electrochemical mass spectrometry, the OER product of C, N-FeNbO 4 /NF is O 2 ( m / z = 32), showing large O 2 evolution efficiency. The “in-situ derivatization–functional synergy” strategy imparts good electrocatalytic performance to C, N-FeNbO 4 /NF. In 1 M KOH and natural seawater, their overpotentials, with just 325 mV and 339 mV individually, can be acquired under 100 mA cm −2 current density. Depending on Tafel curve, the C, N-FeNbO 4 /NF offers strong corrosion resistance (corrosion potential: −0.17 V). Besides, it retains 96.5% initial activity after operating 100 h at 100 mA cm −2 current density in natural seawater.
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ChemCatChem
·
2020
·Vol. 13
·期 1
·346-352
·
IF 4.853
Chen Chen,Jianzhi Wang,Pan Li,Qifeng Tian,Zhuangwei Xiao,Shuaijie Li,Ning Cai,Yanan Xue,Weimin Chen,Faquan Yu
Graphical 2D bimetal-organic frameworks : Graphene aerogel can serve as both the “room” for numerous MOFs and the “conductive bridge” to connect MOFs with metal foam. A 2D bimetallic MIL-53(FeNi) encapsulated in graphene aerogel-grafted Ni foam acts as a binder-free electrode for OER, exhibiting remarkable stability in alkaline media. Metal-organic frameworks (MOFs) have been considered as promising platforms for preparing the efficient oxygen evolution reaction (OER) catalysts, but few of them are directly employed as active components due to their poor electrical conductivity. Herein, a lamellar bimetallic MFN (MIL-53(FeNi)) encapsulated in graphene aerogel-grafted Ni foam has been developed (denoted as MFN@GA/NF). The graphene aerogel (GA) provides abundant space for the in-situ growth of MFN and functions as a “bridge” to connect nickel foam (NF) with MFN by virtue of good conductivity. Benefitting from its structural integrity, the obtained hierarchical MFN@GA/NF exhibited excellent OER performances in alkaline media with an overpotential of 250 mV (20 mA cm −2 ) and 326 mV (200 mA cm −2 ), as well as remarkable stability in continuous electrolysis for over 100 h. This work provides a new channel for engineering MOF-based functional materials with featured architectures.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Yihui Wu,Yuan Zhang,Yuxin Wang,Zhen He,Zhengjian Gu,Shuochao You
Ni–Fe–Sn electrocatalyst supported on nickel foam (Ni–Fe–Sn/NF) with high efficiency of hydrogen evolution reaction (HER) has been successfully fabricated through one-step potentiostatic electrodeposition route. The optimized Ni–Fe–Sn/NF displayed an extremely low overpotential of, respectively, 144 and 180 mV at 50 and 100 mA cm −2 for HER in alkaline condition. Moreover, it could retain its superior stability for at least 12 h. The remarkable electrocatalytic activity of our electrocatalyst is ascribed to the high conductivity originated from synergistic effects between Ni, Fe, and Sn during HER process.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Xingchen Gao,Kaixin Lu,Jianjun Chen,Jie Min,Deliang Zhu,Manlin Tan
The design and manufacture of effective non-noble metal catalysts for the H 2 evolution reaction (HER) are urgent for realizing a cost-effective hydrogen production . We report herein on flower-like structures consisting of NiCoP–CoP heterostructural nanowires grown directly on the hierarchically porous nickel framework (NiCoP–CoP/Ni/NF) to achieve a highly efficient HER in alkaline solution (1.0 M KOH). The NiCoP–CoP/Ni/NF is synthesized by electrodeposition of porous Ni layers on Ni foam, followed by simple hydrothermal reaction and phosphorization. For HER, the binder-free NiCoP–CoP/Ni/NF electrode can reach 10 mA cm −2 current density at a quite low overpotential of 49 mV, because of the combination of porous Ni layers and highly active NiCoP–CoP nanowires. In addition, the NiCoP/CoP heterostructures exhibited remarkable stability under the long-term durability test. This work provides a new strategy that combines electrodeposition and hydrothermal reaction to synthesize effective HER catalysts.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Bei Xue,Kezhi Li,Yao Guo,Jinhua Lu,Shengyue Gu,Leilei Zhang
Direct assembling 2D zeolitic imidazolate frameworks-derived (ZIFs)-derived Ni-Co oxide on Ni foam (Ni x Co 3−x O 4 /Ni foam) is a very attractive way to obtain high performance for electrochemical energy storage device. In this work, the highly optimized Ni x Co 3−x O 4 /Ni foam was prepared via facile co-precipitation, ion-exchange method and subsequently composited with rGO , acting as binder-less electrode for high properties hybrid supercapacitors . As electrode materials , the pure Co 3 O 4 /Ni foam shows 94.40 C g −1 (209.78 F g −1 ) at 1 A g −1 , while the highly optimized Ni x Co 3−x O 4 /Ni foam exhibits a high capacity of 870.3 C g −1 (1934F g −1 ) at 1 A g −1 . Compared with Ni x Co 3−x O 4 /Ni foam, the reduced graphene oxides (rGO) modified Ni x Co 3−x O 4 /Ni foam electrodes possess a porous conductive structure, displaying more superior capacity of 1440.99 C g −1 (3202.22F g −1 ) at 1 A g −1 and a higher cycling stability of 76.10% retention value after 1000 cycles. Subsequently, the Ni x Co 3−x O 4 /rGO/Ni foam electrodes were assembled as a hybrid supercapacitor , exhibiting a maximum energy density of 36.31 Wh kg −1 , a maximum power density of 8000 W kg −1 and a good cycling stability of 76.29% retention value after 3000 cycles. The Ni x Co 3−x O 4 /rGO/Ni foam also could light the blue LED device. Thereby, it is proved that Ni x Co 3−x O 4 /rGO/Ni foam is a promising materials for hybrid supercapacitors.
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PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Yihui Wu,Ying Gao,Hanwei He,Ping Zhang
Low-cost and highly efficient electrocatalysts are highly desirable to improve the efficiency of water splitting for oxygen evolution. In this work, a self-supported ternary Ni–Fe–Sn film on three dimensional nickel foam, which is prepared through a simple electrodeposition method, is investigated as oxygen evolution reaction (OER) electrocatalyst. The Ni–Fe–Sn film displays a considerably low overpotential of 253 mV at a current density of 10 mA cm −2 and a small Tafel slope of 61.5 mV dec −1 and excellent long-term stability for OER in 30% KOH aqueous solution. The good OER performance of Ni–Fe–Sn film may originate from its high electrochemical active surface area, rapid electron/proton and mass transfers, and the close combination between Ni–Fe–Sn film and nickel foam. This work provides a guideline to develop the low-cost and efficient earth-abundant OER anodes.
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高影响因子
RSC Advances
·
2018
·Vol. 8
·期 41
·23397-23403
·
IF 2.936
Zhuo-Liang Jiang,Jing Xie,Cong-Shan Luo,Meng-Yang Gao,Huan-Liang Guo,Mo-Han Wei,Hong-Jun Zhou,Hui Sun
The mechanism of Li–O2 batteries is based on the reactions of lithium ions and oxygen, which hold a theoretical higher energy density of approximately 3500 W h kg−1. In order to improve the practical specific capacity and cycling performance of Li–O2 batteries, a catalytically active mechanically robust air cathode is required. In this work, we synthesized a freestanding catalytic cathode with RuO2 decorated 3D web Co3O4 nanowires on nickel foam. When the specific capacity was limited at 500 mA h g−1, the RuO2–Co3O4/NiF had a stable cycling life of up to 122 times. The outstanding performance can be primarily attributed to the robust freestanding Co3O4 nanowires with RuO2 loading. The unique 3D web nanowire structure provides a large surface for Li2O2 growth and RuO2 nanoparticle loading, and the RuO2 nanoparticles help to promote the round trip deposition and decomposition of Li2O2, therefore enhancing the cycling behavior. This result indicates the superiority of RuO2–Co3O4/NiF as a freestanding highly efficient catalytic cathode for Li–O2 batteries.
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高影响因子
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