JOURNAL OF POLYMER RESEARCH
·
2019
·Vol. 26
·期 9
·1-11
·
IF 1.53
Xiong Xiaopeng,Huo Peng,Xie Haitao
A free-standing Ni 3 S 2 @polypyrrole core-shell nanorod arrays have been successfully prepared and been directly used as supercapacitor. First, needle-like Ni 3 S 2 nanorods array was grown on Ni foam through a hydrothermal process, and was then electrochemically deposited with polypyrrole (PPy) layer. The composition, microstructure, and morphology of the obtained composite material have been studied by attenuated total reflection Fourier transform infrared spectroscopy, X-ray diffraction and scanning electron microscope. Our results indicate that the needle-like Ni 3 S 2 nanorods with diameter about 200 nm and 3 μm in length have grown evenly on Ni foam, and the thickness of the coated PPy layer can be tuned by the electrodeposition time. The electrochemical properties of the obtained free-standing Ni 3 S 2 /Ni@PPy composite foam have been evaluated by a three-electrode system. Our results reveal that the composite foam with the PPy shell layer about 300 nm in thickness displays the best performance, and the area specific capacitance was measured to be over 5 times that of the Ni 3 S 2 /Ni foam to reach 55.4 mF/cm 2 . The improvement has been attributed to the unique hierarchical core-shell microstructure and to the proper amount of PPy deposition. Moreover, the electrochemical stability of the material has been checked to indicate its potential as high-performance supercapacitors.
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Materials Advances
·
2021
·Vol. 2
·期 12
·3971-3980
·
IF 0
Shuai Wang,Zheng Lu,Yuan Fang,Tian Zheng,Zidong Zhang,Wenjian Wang,Rui Zhao,Weidong Xue
Rational construction of self-supporting electrodes has been extensively investigated in energy conversion and storage. In this work, hierarchical N-doped carbon-encapsulated Ni3S2 grown on a 3D porous Ni foam (H-Ni3S2@NC/NF) was controllably synthesized by a one-pot self-templated solvothermal method. Herein, we highlight the self-templated growth of multilayered Ni3S2 with N-doped carbon intercalation at a certain temperature. The unique H-Ni3S2@NC/NF shows enhanced active sites and a modulated electronic structure, which facilitates mass/electron transport. Thereby, the H-Ni3S2@NC outperforms a lower overpotential of 238 mV at 10 mA cm−2 and a low Tafel slope of 62 mV dec−1 than that of binary and ternary metal sulfides, suggesting an excellent mono-metal sulfide as a self-supporting electrode for oxygen evolution reaction.
研究领域:
材料科学
·
电化学
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Bo Zhao,Zengyuan Fan,Xiaohong Zhang,Ying Zhang,Yunpeng Wu,Yining Wang,Hao Sun,Jiawei Wang
The development of efficient non−precious metal catalysts is of critical importance for advancing water splitting technology. Through rational morphological engineering, key parameters such as specific surface area, the density of exposed active sites, and mass transport pathways can be simultaneously optimized, thereby directly enhancing reaction kinetics. In this study, self−supported Ni 3 S 2 nanoarrays were synthesized via a sequential pretreatment and sulfidation strategy, utilizing nickel foam as both the nickel source and the growth substrate. The resulting nanoarray structure proved to be an efficient and durable electrocatalyst for water splitting. In 1.0 M KOH solution, the overpotential of the HER (69 mV) approaches that of Pt/C, whilst the OER overpotential (199 mV) outperforms RuO 2 , yielding an overall water splitting voltage of 1.54 V (10 mA cm −2 ). The same excellent catalytic activity was also exhibited in simulated seawater with overpotentials of 98 and 225 mV for HER and OER, respectively. The main reason for the enhanced catalyst activity is attributed to the unique nanoarray morphology that exposes a larger electrochemically active specific surface area and provides abundant active sites. More importantly, there is a strong coupling between nickel foam substrate and Ni 3 S 2 nanoarrays catalyst. The strong Ni−S chemical bond formed during the hydrothermal preparation much improves the catalytic activity, electronic conductivity and structural stability.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 2
·121501
·
IF 7.2
Xiaoqian Ma,Han Zhang,Yi Zhao,Shuai Ma,Xiaoli Bai,Yuanchun Zhang,Daomei Chen,Jiaqiang Wang
Self-cycled photo-Fenton system, which integrates photocatalysis with Fenton technology, is investigated thoroughly in wastewater treatment due to the virtues of no addition of H 2 O 2 and accelerated circulation of Fe 2 + /Fe 3+ . Here we report an enhanced sulfur vacancy modified α-MnS/Ni 3 S 2 on nickel foam(NF), the simple hydrothermal successfully fabricated the magnetic floriform α-MnS/Ni 3 S 2-x /NF rich in sulfur defects. α-MnS enhanced the sulfur vacancy and further improved the hydrogen peroxide production performance of floriform Ni 3 S 2 . Without the external addition of both H 2 O 2 and Fenton-like metal ions, α-MnS/Ni 3 S 2-x /NF floriform exhibited an extremely high H 2 O 2 production rate of 51.6 mM·h −1 ·g −1 under visible light irradiation, which is the highest than those reported photocatalysis self-Fenton system in the literature. Interestingly, the self-cycled photo-Fenton strategy can be applied to the reduction of Cr(VI) and oxidative degradation of oxytetracycline hydrochloride(OTC), and the corresponding degradation and reduction rates all reach up to 98 %. The wide-spectrum light harvesting, photothermal effect and solar-driven photocatalysis in the α-MnS/Ni 3 S 2-x /NF are beneficial for the synergistically enhanced thermal-assisted photodegradation toward wastewater with a water evaporation rate of 2.01 kg·m −2 ·h −1 . Furthermore, a series of experiments and calculations were carried out to verify the photocatalytic mechanism. Density function theory (DFT) calculation shows that the formation of sulfur defects increases the number of active sites, decreases the energy barrier, and improves the activity and selectivity. In addition, α-MnS/Ni 3 S 2-x /NF floriform also exhibited good performance in real wastewater containing fluoronitrobenzene from a factory. Our findings may help the development of novel functional nanostructures for applications in environmental remediation and solar steam generation.
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CHEMISTRY-A EUROPEAN JOURNAL
·
2026
·
IF 3.6
Xinquan Zhao,Shisheng Li,Xinshu Zhang,Zhi Gao,Yi Du,Wanying Lei
Exploring efficient, stable, and earth-abundant electrocatalysts toward the oxygen evolution reaction (OER) is a central theme for realizing industrial application of water splitting. In this study, a 1D@2D heterostructure of Co 9 S 8 -Ni 3 S 2 @CoFe LDH/NF is constructed via hydrothermal and electrodeposition approaches, where ultrathin CoFe LDH nanosheets are interconnected and deposited onto Co 9 S 8 -Ni 3 S 2 nanorod arrays. This 1D@2D microstructure benefits from the exposure of a large number of accessible reactive sites. The strong interaction between the sulfide hybrid and LDH material could modulate the electronic structure of Co 9 S 8 -Ni 3 S 2 @CoFe LDH and generate a high concentration of high-valence metal sites. As a result, the optimal catalyst exhibits superior OER performance with a low overpotential of 189 mV at 10 mA cm −2 , a small Tafel slope of 30.22 mV dec −1 , and good stability in alkaline solution. This work opens up a possibility for obtaining efficient and cost-effective electrocatalysts for clean energy production through water splitting. Graphical Exploring efficient, stable, and earth-abundant electrocatalysts toward the oxygen evolution reaction (OER) is a central theme for realizing industrial applications of water splitting. In this study, a 1D@2D heterostructure of Co 9 S 8 -Ni 3 S 2 @CoFe LDH/NF is constructed via hydrothermal and electrodeposition approaches, where ultrathin CoFe LDH nanosheets are interconnected and deposited onto Co 9 S 8 -Ni 3 S 2 nanorod arrays. This 1D@2D microstructure benefits from the exposure of a large number of accessible reactive sites. The strong interaction between the sulfide hybrid and LDH material could modulate the electronic structure of Co 9 S 8 -Ni 3 S 2 @CoFe LDH and generate a high concentration of high-valence metal sites. As a result, the optimal catalyst exhibits superior OER performance with a low overpotential of 189 mV at 10 mA cm −2 , a small Tafel slope of 30.22 mV dec −1 , and good stability in alkaline solution. This work opens up a possibility for obtaining efficient and cost-effective electrocatalysts for clean energy production through water splitting.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Luyao Lv,Hurong Zhang,Jiaqi Zhao,Mei Yan,Chunlin Li,Zeyan Lu,Lulu Huo,Tengfei Ma,Bo Liu
Developing efficient electrocatalysts for the oxygen evolution reaction (OER) is critical for sustainable energy conversion. Herein, a P-doped Co 9 S 8 /Ni 3 S 2 heterostructure with a hierarchical nanoarray architecture is fabricated on nickel foam via an in situ growth strategy. Structural characterizations reveal a dense, three-dimensional hierarchical coral-like architecture, composed of ultrathin nanosheets intricately decorated with fine nanorods. High-resolution TEM analysis confirms the construction of Co 9 S 8 /Ni 3 S 2 hetero-interfaces characterized by abundant lattice distortions and grain boundary defects. X-ray photoelectron spectroscopy analysis reveal that phosphorus incorporation induces a redistribution of local electron density at the active sites, suggesting a favorable modulation of the electronic structure that promotes intrinsic catalytic activity. Benefiting from the synergistic effects of abundant interfacial defects, rapid charge and mass transport channels, and the modulated electronic environment, the as-prepared catalyst exhibits enhanced OER performance. In 1.0 M KOH electrolyte, the heterostructure requires a low overpotential of 234.84 mV to deliver a current density of 10 mA cm −2 along with a small Tafel slope of 19 mV dec −1 and sustains continuous operation for over 500 h. This study offers valuable insights into the coupling of interface engineering and heteroatom doping for constructing high-performance transition metal sulfide electrocatalysts.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Yanling Wang,Yu Wang,Wensheng Fu,Guanyun Gao,Yanru Liu,Lei Wang
The preparation of low-cost and high-activated catalysts is an important challenge in the development of hydrogen production industry. Here we reported a novel core-shell triangular cone electrocatalyst Ni 3 S 2 @Ni 3 N@Co 2 N 0.67 grown on nickel foam (Ni 3 S 2 @NiCoN/NF) obtained by a self-templated method. The obtained Ni 3 S 2 @NiCoN/NF consists of Ni 3 S 2 triangular cone core and Ni 3 N@Co 2 N 0.67 particles shell, which has rich heterogeneous interface and synergistic effect. The strong electronic interaction at the newly bonded heterojunction regulates the electronic structure of active Ni, which is conducive to the transfer of charge to the active site. In addition, NiCoN particles are coated on the surface of Ni 3 S 2 triangular pyramidal nucleus to form a core-shell structure, which can make sure the exposure of active sites. It is found that the self-templated conversion of Co(OH) 2 coated Ni 3 S 2 into NiCoN/Ni 3 S 2 enhances the activity for hydrogen evolution reaction (HER). The hybrid material has excellent HER catalytic performance under alkaline conditions, which only needs to overcome the overpotential of 63 and 174 mV to reach the current density of 10 and 100 mA cm −2 , respectively. This study provides a new idea for the preparation of efficient and stable catalysts with core-shell structure for HER.
研究领域:
材料科学
·
电化学
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JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2020
·Vol. 167
·期 12
·126514
·
IF 3.721
Zhiju Zhao,Liqin Yang,Zheng Wang,Lili Wang,Guiquan Guo,Jing Chen,Yuanyuan Li,Chenglin Wang,Jun Zhao,Zhenyu Cai
Substituting the smaller theoretical applied potential of the urea oxidation reaction (UOR) for the larger theoretical potential of anodic water electrolysis (oxygen evolution reaction (OER)) is critical for the energy requirement in the evolution of hydrogen. In this work, a brief and scalable strategy was presented to synthesize nickel sulfide and multi-walled carbon nanotube composites on Ni foam, denoted as Ni3S2/MWCNTs/NF. Electrochemical measurements show that Ni3S2/MWCNTs/NF can be an efficient electrocatalyst for UOR. A potential of 1.338 V was required at a current density of 10 mA·cm−2 for UOR with Ni3S2/MWCNTs/NF. This UOR catalyst was used to replace OER for hydrogen production, which reduced the overpotential required for H2-production and reduced overall power consumption. Also, the Ni3S2/MWCNTs/NF catalyst exhibited high electrocatalytic efficiency to evolve hydrogen, which provided a low overpotential of only 104 mV at 10 mA·cm−2. As a proof of concept, a water-urea electrolysis measurement was carried out in 1 M KOH with 0.5 M urea using Ni3S2/MWCNTs/NF as the cathode and anode, respectively. Ni3S2/MWCNTs/NF∣∣Ni3S2/MWCNTs/NF electrodes provided a current density of 10 mA·cm−2 at a voltage of 1.509 V, which was 149 mV lower than that of water splitting, which proved that this catalyst may be commercially viable in energy-saving hydrogen production.
研究领域:
材料科学
·
电化学
·
能源催化
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Journal of Energy Chemistry
·
2018
·
IF 3.886
Shuai Wang,Jiguo Tu,Jiusan Xiao,Jun Zhu,Shuqiang Jiao
The growing global demands of safe, low-cost and high working voltage energy storage devices trigger strong interests in novel battery concepts beyond state-of-art lithium-ion battery. Herein, a dual-ion battery based on nanostructured Ni 3 S 2 /Ni foam@RGO (NSNR) composite anode is developed, utilizing graphite as cathode material and LiPF 6 -VC-based solvent as electrolyte. The battery operates at high working voltage of 4.2–4.5 V, with superior discharge capacity of ∼90 mA h g −1 at 100 mA g −1 , outstanding rate performance, and long-term cycling stability over 500 cycles with discharge capacity retention of ∼85.6%. Moreover, the composite simultaneously acts as the anode material and the current collector, and the corrosion phenomenon can be greatly reduced compared to metallic Al anode. Thus, this work represents a significant step forward for practical safe, low-cost and high working voltage dual-ion batteries, showing attractive potential for future energy storage application .
研究领域:
材料科学
·
能源技术
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Science China-Chemistry
·
2023
·Vol. 66
·期 12
·3636-3644
·
IF 9.6
Wang Shuangyue,Yang Ganceng,Jiao Yanqing,Liu Yue,Tian Chungui,Wu Aiping,Yan Haijing
Electrooxidation of the biomass derivative 5-hydroxymethylfurfural (HMF) is a highly promising approach for attaining versatile value-added chemicals ( e.g. , 2,5-furandicarboxylic acid, FDCA). Ni-based sulfides are promising electrocatalysts for HMF electrooxidation reaction (HMFOR). However, the HMFOR activity of Ni-based catalysts is far from satisfactory due to the unfavorable adsorption of HMF and OH*. Herein, we propose controlled W doping to effectively modify the electronic configuration of nanostructured Ni 3 S 2 to manipulate adsorption of HMF and OH*, for efficiently converting HMF into FDCA. Experimental and theoretical calculations indicate the incorporation of high-valence W results in the upshift of d-band center of Ni 3 S 2 , which facilitates the adsorption and dissociation of water to produce more OH*. Meanwhile, the high-valence W has strong electron-withdrawing ability and attracts electrons from Ni, leading to the elevated Ni valence, which is beneficial to optimizing the adsorption energy of HMF. Both concurrently contribute to the superb HMFOR performance. As a result, W 20 -Ni 3 S 2 @NF with optimal W dopant exhibits a low driving potential (1.34 V vs. RHE at 10 mA cm −2 ), accompanying with the 100% HMF conversion, 99.2% FDCA selectivity, and 97.3% Faraday efficiency. This work provides a design principle for HMFOR electrocatalysts by modulating the adsorption behaviors of HMF and OH* via rational electronic structure engineering.
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Journal of Energy Storage
·
2023
·
IF 9.4
Zengcai Guo,Jianpeng Mu,Junpeng Wang,Jingbo Mu,Hongwei Che,Feng Li,Hang Yang,Lixin He,Fangfang Wei
How to design and synthesize of advanced MOF-based electrode materials for high-performance supercapacitors is still a huge challenge, herein, CoNi-MOF@Ni 3 S 2 and ZIF-67/Ni 3 S 2 with unique heterostructures are rationally designed and constructed. The composite electrode materials not only make up for the poor conductivity of MOF, but also improve the structural stability of Ni 3 S 2 . As expected, the optimized ZIF-67/Ni 3 S 2 and CoNi-MOF@Ni 3 S 2 electrode demonstrates a remarkably enhanced specific capacitance of 1017.13 F g −1 and 1930.04 F g −1 at 1 A g −1 , respectively, which are higher than those of their respective monomeric components. Finally, ZIF-67/Ni 3 S 2 //AC and CoNi-MOF@Ni 3 S 2 //AC devices were assembled, which delivered an impressive energy density of 94.49 and 125.34 Wh kg −1 , along with the corresponding power density of 966.34 W kg −1 971.86 W kg −1 , respectively. Moreover, by comparison, the CoNi-MOF@Ni 3 S 2 electrode material exhibits better supercapacitor performance than ZIF-67/Ni 3 S 2 . This effective protective strategy provides an alternative way for constructing MOF or sulfide electrodes with remarkably improved energy storage performance.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Dan Yang,Liyun Cao,Jianfeng Huang,Gengsheng Jiao,Donghua Wang,Qianqian Liu,Guodong Li,Chaozheng He,Liangliang Feng
Elaborate and rational design of cost-effective and high-efficiency non-noble metal electrocatalysts for pushing forward the sustainable hydrogen fuel production is of great significance. Herein, a novel VS 4 nanoparticle decorated Ni 3 S 2 nanobelt array in-situ grown on nickel foam (VS 4 /Ni 3 S 2 /NF NBs) was prepared by a self-templated synthesis strategy. Benefitting from the unique nanobelt array structure, abundant highly active bridge S 2 2- sites and strong electronic interaction between VS 4 and Ni 3 S 2 on the heterointerface, the integrated VS 4 /Ni 3 S 2 /NF NBs exhibited excellent electrocatalytic hydrogen evolution activity and robust stability. The density functional theory (DFT) further revealed the reversible conversion catalysis mechanism of bridging S 2 2- sites in VS 4 /Ni 3 S 2 /NF NBs during HER process. Notably, bidentate bridging S S bonds as the predominant catalytically active centers can spontaneously open once H adsorbed its surface, leading to the aggregation of negative charges on S atoms and thus facilitating the generation of H* intermediates, and spontaneously close when H* desorption is going to form H 2 . Our work provides fresh insights for developing potential polysulfides as high-performance hydrogen-evolving electrocatalysts for prospective clean energy production from water splitting.
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高影响因子
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