Catalysts
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2019
·Vol. 9
·期 5
·458
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IF 3.444
Lihong Xie,Dengke Zhao,Jiale Dai,Zexing Wu,Ligui Li
Exploring efficient non-precious metal based electrocatalysts for the oxygen evolution reaction (OER) is a prerequisite to implement the widespread application of a water electrolyzer and metal-air batteries. Herein, Fe-doped NiS2nanoparticles on a carbon matrix (Fe-NiS2/C) are facilely prepared via a two-step solvothermal process, where Ni-containing metal organic frameworks (Ni-MOFs) are vulcanized in situ and carbonized by a solvothermal method to form abundant NiS2nanoparticles homogeneously distributed on a carbon matrix (NiS2/C), followed by doping with ferric ions via a similar solvothermal treatment. The resulting Fe-NiS2/C nanoparticle composites show a rougher surface than the NiS2/C parent, likely due to the formation of more structural defects after ferric ion doping, which maximizes the exposure of active sites. Moreover, ferric ion doping can also regulate the surface electronic state to reduce the activation energy barrier for OER on NiS2/C sample. With these merits, the best sample Fe-NiS2/C-30 only requires a potential of +1.486 V (vs. RHE) to reach an OER current density of 10 mA cm−2and can retain 96.85% of its initial current after continuous working for about 10 h in 1.0 M KOH aqueous solution, along with a small Tafel slope of 45.66 mV/dec, outperforming a commercial RuO2catalyst. The results in this work enrich the method to tailor the catalytic activity of transition metal sulfides for electrochemical energy technologies.Keywords:oxygen evolution reaction;electrocatalyst;nickel disulfide;doping;activity
研究领域:
材料科学
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电化学
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DOI
高影响因子
INORGANIC CHEMISTRY
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2026
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IF 4.6
Guirong Duan,Jie Jiang,Yanqing Jiao,Jiaqi Wang,Xi Zhao,Ganceng Yang,Haijing Yan,Honggang Fu
Developing low-cost, corrosion-resistant catalytic electrodes for the oxygen evolution reaction (OER) is essential for efficient and durable hydrogen production via anion exchange membrane water electrolysis (AEMWE). Herein, we report a polydopamine (PDA)-coated Fe,Cr codoped NiS2 self-supporting electrode (PDA-Fe,Cr-NiS2@NF). The nitrogen-rich functional groups of PDA establish robust M-N coordination bonds with active metal centers, thereby suppressing metal dissolution during anodic reconstruction. In parallel, the conductive PDA layer regulates interfacial electron redistribution and optimizes the hydrogen-bond network of interfacial water, lowering the OER activation energy. Its conformal protective layer further enhances catalyst stability. The optimized electrode delivers an OER overpotential of only 247 mV at 1 A cm–2. When integrated as the anode with a PtNiC cathode in an AEMWE cell, the system reaches a current density of 1 A cm–2 at only 1.737 V at 70 °C and operates stably for 1000 h, with a voltage decay rate of only 0.1 mV h–1, an electrolysis efficiency of 71.96%, and an energy consumption of 4.157 kWh Nm3– H2. This work establishes a viable coordination-protection strategy for constructing durable, high-performance OER electrodes for industrial-scale water electrolysis.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Yao Ding,Zhongyi Shi,Shupei Liu,Yuxin Zhang
A dual-surface growth strategy fully utilized the hollow architecture of diatomite. • A layered NiO/NiS 2 composite was constructed through in situ sulfurization. • FIB analysis directly verified active-material growth on inner and outer surfaces. • The synergistic interaction at the NiO/NiS 2 composite promoted charge-transfer kinetics and redox activity. • Wireless charging and LEDs illumination demonstrated the practical applicability of the assembled supercapacitor. The rational design of electrode architectures is critical for developing high-performance supercapacitors with efficient charge storage and practical energy applications. Herein, a diatomite (De) templated NiO/NiS 2 composite electrode (NiO/NiS 2 -etch) with a distinctive layered nanosheet/nanosphere architecture was constructed through a controllable partial sulfurization strategy. By regulating the NiO@De and TAA ratio to 2:1, partial conversion of NiO nanosheets into NiS 2 nanospheres was achieved, while the three-dimensional hollow porous framework of diatomite was effectively preserved. The resulting layered structure provides abundant electrolyte-accessible active sites and promotes rapid charge transfer within the electrode. Benefiting from this structural design, the NiO/NiS 2 -etch electrode delivers a high specific capacitance of 1020 F/g at 1 A/g and retains 80.52% of its capacitance after 5000 charge–discharge cycles. Furthermore, the assembled supercapacitor was integrated into a wireless charging system, where the stored energy was successfully utilized to activate LED indicators, demonstrating the capability of supercapacitors as efficient energy storage units for wireless charging applications. This work presents a controllable biomass template strategy for constructing layered composite electrodes and provides new insights into the development of supercapacitor-powered wireless energy technologies. Download: Download high-res image (214KB) Download: Download full-size image
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Wei Xia,Congling Li,Li Zhang,Xuemin Yu,Li Zheng,Rui Liu,Aifeng Lv
The development of highly efficient electrocatalysts is of utmost importance for advancing electrochemical energy conversion technologies. Transition metal sulfide heterostructure electrocatalysts have been widely studied and applied in electrocatalysis due to their highly inherent activity in the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) at the interface. We prepared NiS 2 /CoS 2 nanoparticle heterostructures doped with nitrogen-carbon nanotubes (CoS 2 /NiS 2 @N-CNTs) to induce the formation of bifunctional reaction sites. This design contributes to the excellent catalytic activity for electrocatalytic water splitting. The CoS 2 /NiS 2 @N-CNTs electrocatalyst exhibits prominent catalytic activities toward HER and OER, which required low overpotentials of 126 and 205 mV to yield the current density of 10 mA cm −2 in 1 M KOH. The prepared electrocatalysts exhibit fast reaction kinetics with tafel slopes of 71 and 82 mV dec −1 in HER and OER, respectively. The catalyst has a larger electrochemically active surface area (ECSA) of 1030 cm −2 and a strong electron transfer capability with an electrochemical impedance of 41 Ω. These properties are mainly attributed to the unique heterogeneous structure of the catalyst. In addition, CoS 2 /NiS 2 @N-CNTs catalyst is used as both the cathode and anode to fabricate a two-electrode system in a 1.0 M KOH solution measured at 1.53 V. Meanwhile, the stability measurement maintains for 23 h at a current density of 10 mA cm −2 with negligible degradation. This work has successfully developed an approach for rational design and novel synthesis of metal sulfide hybrids as bifunctional electrocatalysts with high activity and stability for overall water splitting.
研究领域:
材料科学
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电化学
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能源技术
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产品关联
DOI
高影响因子
International Journal of Electrochemical Science
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2023
·Vol. 12
·期 5
·4610-4618
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IF 1.5
Chenle Zhang,Libo Deng,Peixin Zhang,Xiangzhong Ren,Yongliang Li,Tingshu He
Electrocatalytic NiS 2 cubes were directly synthesized on F-doped tin oxide using a hydrothermal approach and used as counter electrode in dye-sensitized solar cells (DSSCs). The NiS 2 cubes displayed an excellent electrocatalytic activity in the reduction of I 3 − showing a power conversion efficiency of 5.56%, which is close to that of the Pt-containing DSSC (7.05%). Furthermore, the NiS 2 cubes showed a comparable stability to Pt. This is ascribed to the low resistance to diffusion and transfer of electrolyte ions. These results suggest that the NiS 2 cubes prepared through a facile process is a promising substitute to Pt electrode.
研究领域:
材料科学
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能源化学
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纳米材料
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电化学
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光伏器件
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DOI
高影响因子
LANGMUIR
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2025
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IF 3.9
Yu-Le Wang,Cong Wang,Song-Hai Wu,Yong Liu,Xu Han
Although spontaneous H2O2 accumulation by sacrificial oxidation of metal disulfides (FeS2, NiS2, etc.) under oxic conditions without external electrical/photonic input has been observed, the mechanistic understanding of HCO3– on the production of H2O2 is still not clear. In this study, HCO3– apparently accelerates the production of H2O2 on NiS2, and the produced H2O2 increases from 53.85 to 90.12 μM with increasing concentrations of HCO3– from 0 to 0.5 M at pH 9.0. Electrochemical analyses indicate that HCO3– effectively mediates the 2e reduction of O2 to H2O2 on the surface of NiS2. EPR and Raman analyses rule out the primary contributions of soluble •OH and O2•– to the production of H2O2 and reveal the presence of both ≡Ni–OO• superoxo and ≡Ni–OOH peroxo on NiS2, which are important precursors for H2O2. The presence of CO3•– also indicates that HCO3– is an important H-donor during the reduction of O2 to H2O2. DFT calculations further reveal that it is thermodynamically more favorable for ≡Ni–OO• and ≡Ni–OOH to abstract H from HCO3– than from H2O to produce H2O2, confirming that HCO3– is a better H-donor than H2O to produce H2O2 via the H-abstraction pathway. This study provides insight into the importance of HCO3– on spontaneous H2O2 accumulation by sacrificial oxidation of NiS2 under oxic conditions without external electrical/photonic input.
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DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
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2025
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IF 5.6
Fei Zhou,Lanrui Yin,Changfu Zhuang,Ying Wang,Yimo Xiang,Di Tian
Recently, the development of transition metal sulfides as electrode materials in supercapacitors has been hindered by their slow reaction kinetics and insufficient stability. In this paper, a heterogeneous NiS 2 /Ni 3 S 4 composite of a small size was generated via a solvothermal process using Ni-MOF as a precursor. The heterogeneous NiS 2 /Ni 3 S 4 is conducive to the increase of redox sites and optimization of ion diffusion channels. Meanwhile, the small size of NiS 2 /Ni 3 S 4 improves the redox reaction kinetics between the electrochemically active material and electrolyte. These advantages resulted in S-Ni-MOF(1) with a high specific capacitance of 895.56 F g −1 (403.00 C g −1 ) at 0.5 A g −1 , as well as features of battery-type materials. In addition, a bamboo-derived active carbon (BBC) was prepared for the hybrid supercapacitor device (S-Ni-MOF(1)//BBC). The device possessed the largest energy density of 50.92 Wh kg − ¹ at the power density of 1,500 W kg −1 . After 10,000 charge/discharge processes, its specific capacitance reached 74.47% of its initial value. The connected devices supported the illumination of LEDs, demonstrating good application prospects. This work will offer novel references for designing heterogeneous sulfide and MOF derived nanomaterials.
研究领域:
材料科学
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能量存储与转换
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纳米技术
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电化学
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产品关联
DOI
高影响因子
Nanomaterials
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2019
·Vol. 9
·期 2
·292
·
IF 4.034
Zhi Zhang,Xuliang Lv,Yiwang Chen,Pin Zhang,Mingxu Sui,Hui Liu,Xiaodong Sun
For the purposes of strength, military equipment camouflage, and protecting the health of organisms, electromagnetic wave absorbing materials have received a lot of attention and are widely studied. In addition to having a strong absorption intensity and a wide effective absorption bandwidth, materials that are lightweight, thermally stable, and antioxidative are also highly desirable. In this study, we fabricated core–shell structured NiS2@MoS2nanospheres anchored on reduced graphene oxide (rGO) nanosheets (NiS2@MoS2/rGO) by a simple two-step hydrothermal method. The combination ratio was adjusted to achieve proper impedance matching. The electromagnetic parameters and the absorption performance were investigated in detail. A composite loaded with 30 wt.% of the sample achieved a minimum reflection loss (RL) value of −29.75 dB and the effective bandwidth (RL value of less than −10 dB) ranged from 4.95 GHz to 18.00 GHz (13.05 GHz), with a thickness ranging from 1.5 mm to 4.0 mm. This study proved that the generated significant interfacial polarization and synergetic interaction between components can result in NiS2@MoS2/rGO composites with enhanced electromagnetic absorption performance.Keywords:graphene;core–shell;heterostructure;electromagnetic absorption
研究领域:
材料科学
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电磁学
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
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2025
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IF 8.2
Jinyun Liu,Jiamin Liu,Ting Zhou,Xiaofei Huang,Yajun Zhu,Haojun Xu,Tianli Han
Magnesium/lithium hybrid-ion batteries (MLHBs) are considered promising owing to their high theoretical capacity and good safety and a broad range of magnesium resources; however, nonideal cathode materials and electrolytes restrict their development. Here, a composite composed of NiS2 nanosheet-coated Cu2S (Cu2S@NiS2) cubes is developed as a cathode material, which improves conductivity and accommodates volume change, achieving high and stable electrochemical performances. Also, we develop a LiCl-introduced all-phenyl-complex electrolyte (APC-LiCl), exhibiting a wide electrochemical window, stable cycling properties, and enhanced Mg dissociation/deposition compared to LiBF4 or LiTFSI-induced APC systems. The constructed MLHB exhibits a high energy density of 330 Wh kg–1 on an active cathode material basis when cycling at 0.3 A g–1, a stable specific capacity of 215 mAh g–1 after 400 cycles at 0.5 A g–1, and excellent temperature tolerance and rate performance, enabling our findings to be broadly applied for developing emerging energy-storage systems.
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF RARE EARTHS
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2025
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IF 7.2
Biying Tian,Yaqin Chen,Jiawen Sun,Yi-Ru Hao,Chunhao Li,Jing Sun,Hui Xue,Qin Wang
The feasibility of enhancing the electrocatalytic performance of sulfides is demonstrated through element doping and vacancy engineering. However, the investigation on the reaction mechanisms of catalyst doping and defects related to oxygen evolution reaction (OER) still faces significant challenges. In this work, a Ce-doped NiS 2 supported on carbon cloth (Ce-NiS 2 @CC) with abundant sulfur vacancy defects was successfully developed through a sequential two-step hydrothermal and high-temperature vulcanization strategy. The results demonstrate that the obtained Ce-NiS 2 @CC catalyst exhibits excellent electrochemical performance for both OER and urea oxidation reaction (UOR). It requires only 1.40 and 1.28 V to achieve a current density of 10 mA/cm 2 for OER and UOR, respectively. Furthermore, the Tafel slopes observed for OER and UOR are noteworthy at 40.2 and 58.3 mV/dec, respectively, suggesting enhanced kinetics and superior catalytic performance. Additionally, the stability tests conducted on the catalyst reveal that the Ce-NiS 2 @CC possesses exceptional electrochemical long-term stability, making it a highly reliable and durable option for various applications. Density functional theory calculations and in situ Raman results demonstrate that Ce doping and sulfur vacancy synergistically promote surface reconstruction to form Ni Ⅲ –O species, modulate the local charge distribution near the Ni site, thereby facilitating the adsorption and activation of water molecules, and consequently accelerating the kinetics of OER. This study systematically investigated the impact of metal doping and vacancy defects on electrocatalytic performance, offering insights into electronic structure regulation and performance optimization for efficient electrocatalysts.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Ximin Ling,Wutao Wei,Changwei Shan,Xuyan Qin,Mingjie Song,Zhao Liu,Liwei Mi
Mg 2+ /Li + hybrid batteries (MLHBs), which support the rapid insertion and removal of Mg 2+ /Li + bimetallic ions, are promising energy storage systems. Inspired by the Kirkendall effect, ball-in-ball bimetallic sulfides with heterostructures were prepared as cathode materials for the MLHBs. First, a nickel–cobalt precursor (NiCo-X precursor) with three-dimensional (3D) nanosheets on its surface was prepared using a solvothermal method based on the association reaction between alkoxide molecules. Subsequently, the NiCo-X precursor was vulcanized at high temperature using the potential energy difference as the driving force to successfully prepare NiS 2 @CoS 2 core–shell hollow spheres. When used as the positive electrode material for the MLHBs, the NiS 2 @CoS 2 hollow spheres exhibited excellent Mg 2+ /Li + ion storage capacity, high specific capacity, good rate performance, and stable cyclic stability owing to their tough hierarchical structure. At a current density of 500 mA g −1 , a specific capacity of 536 mAh g −1 was maintained after 200 cycles. By explaining the transformation mechanism of Mg 2+ /Li + in bimetallic sulfides, it was proven that Mg 2+ and Li + worked cooperatively. This study provides a new approach for developing MLHBs with good electrochemical properties.
研究领域:
材料科学
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能源存储技术
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Xiaofen Dong,Feijiang Chen,Guoguang Chen,Bin Wang,Xiaoli Tian,Xiaolong Yan,Ya-Xia Yin,Chengwei Deng,Duan Wang,Jianfeng Mao,Sailong Xu,Shilin Zhang
Rational design of high-capacity nanosized composites as anode nanomaterials is crucial to boosting electrochemical performances towards large-scale application for lithium- and sodium-ion batteries (LIBs and SIBs). The small sizes and homogeneous dimensional size distributions are achieved typically by either the surface confinement on the underlying supports, or the encapsulation confinement within the precursors (such as metal-organic frameworks). Herein, we report the ultrasmall NiS 2 nanodots on reduced graphene oxide (NiS 2 /N,S-rGO) synthesized via interlayer confinement as anode nanomaterials for LIBs and SIBs . The composite is synthesized by pyrolyzing a host/guest precursor of sodium dodecyl sulfate ion/[NiEDTA] 2− anions co-intercalated MgAl-layered double hydroxide LDH host, without additional sulfur source. The host/guest-derived interlayer nanoconfinement enables the composite to integrate the advantageous features: low-content active NiS 2 nanodots (11.0 wt%) with a mean size of 3.8 ± 0.5 nm, high-content N,S-rGO (89.0 wt%), as well as a large specific surface area and mesopore size distribution. The composite used as anode nanomaterial exhibits reversible capacities of 801.2 mAh g −1 after 100 cycles at 100 mA g −1 for LIBs , and 207.7 mAh g −1 after 200 cycles at 0.1 A g −1 for SIBs , which are greatly higher than those of the pristine N,S-rGO without NiS 2 nanodots. The enhancement is experimentally supported by the low charge transfer resistance, high capacitive-controlled contribution, and good structural stability. Our guest/host-based interlayer nanoconfinement can promise an effective synthesis strategy for designing various nanosized anodes for electrochemical energy storage.
研究领域:
材料科学
·
电化学能存储
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DOI
高影响因子
危险品化学品经营许可证（带存储）