Nanomaterials
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2021
·Vol. 11
·期 5
·1245
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IF 5.076
Zehui Peng,Shuai Lou,Yuan Gao,Lijun Kong,Shancheng Yan,Ka Wang,Haizeng Song
There are abundant water resources in nature, and hydrogen production from electrolyzed water can be one of the main ways to obtain green and sustainable energy. Traditional water electrolysis uses precious metals as catalysts, but it is difficult to apply in massive volumes due to low reserves and high prices. It is still a challenge to develop hydrogen electrocatalysts with excellent performance but low cost to further improve the efficiency of hydrogen production. This article reported a potential candidate, the Co-NiS2/CoS2(material is based on NiS2, and after Co doping, The NiS2/CoS2heterostructure is formed) heterostructures, prepared by hydrothermal method with carbon paper as the substrate. In a 0.5 M sulfuric acid solution, the hydrogen evolution reaction with Co-NiS2/CoS2as the electrode showed excellent catalytic performance. When the Co (Cobalt) doping concentration is increased to 27%, the overpotential is −133.3 mV, which is a drop of 81 mV compared with −214.3 mV when it is not doped. The heterostructure formed after doping also has good stability. After 800 CV cycles, the difference in overpotential is only 3 mV. The significant improvement of the catalytic performance can be attributed to the significant changes in the crystal structure and properties of the doped heterostructures, which provide an effective method for efficient electrocatalytic hydrogen production.Keywords:hydrogen evolution reaction;catalysts;heterostructures;transition metal dichalcogenides
研究领域:
材料科学
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电化学
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
·
IF 9.6
Pengli Bai,Huimin Fang,Weiguo Wang,Enzhou Liu
Treating H 2 S in a NaOH/Na 2 SO 3 solution simultaneously transforms it into H 2 /Na 2 S 2 O 3 . • Precise control of the Se/S atomic ratio in CdS 1− x Se x solid solutions enables continuous bandgap tuning. • The construction of a NiS 2 /CdS 0.90 Se 0.10 Schottky heterojunction enhances interfacial charge separation efficiency. • Investigation of the compositional evolution of CdS 0.90 Se 0.10 under varying alkaline conditions and its intrinsic mechanism underlying enhanced hydrogen evolution activity. Photocatalytic conversion of toxic hydrogen sulfide (H 2 S) waste gas into high-purity hydrogen (H 2 ) and value-added sulfur-containing chemicals has emerged as a transformative technological solution for enhancing sustainability in the coal chemical and petrochemical sectors. In this study, a selenium (Se) doping strategy was employed to synthesize CdS 1- x Se x solid solution photocatalysts, enabling precise band-gap modulation to alleviate rapid charge recombination and photo-corrosion of CdS. At an optimized Se content of x = 0.10, the resulting material exhibits a more negative conduction band minimum, thereby enhancing the thermodynamic driving force for H 2 evolution. Subsequently, a Schottky junction was constructed by depositing NiS 2 cocatalyst onto the surface of CdS 0.90 Se 0.10 (CSS). The 2 wt % NiS 2 /CSS composite delivered a H 2 evolution rate of 3.5 mmol g −1 h −1 in an H 2 S-saturated solution (0.2 M NaOH, 0.6 M Na 2 SO 3 ), corresponding to a 2.9-fold enhancement over pristine CSS. Electrochemical characterization showed that incorporation of the NiS 2 cocatalyst reduced the charge-transfer resistance and H 2 evolution overpotential, and increased the electrochemically active surface area. Fourier transform infrared spectroscopy, ultraviolet–visible diffuse reflectance spectroscopy, and thiosulfate (S 2 O 3 2− ) titration confirmed the concurrent conversion of H 2 S to S 2 O 3 2− . Moreover, the alkaline reaction medium contributed to improved catalyst stability. This synergistic strategy addresses the twin challenges of chalcogenide photocorrosion and decomposition of waste H 2 S, thereby providing experimental evidence for the valorization of sulfur-containing wastes and H 2 production. This study reports a CdS 1- x Se x /NiS 2 photocatalytic system that achieves efficient, alkaline-mediated conversion of toxic H 2 S into high-purity H 2 and S 2 O 3 2− , while simultaneously suppressing photocorrosion and enhancing charge separation. It establishes a robust, sulfur-centered strategy for H 2 S valorization. Download: Download high-res image (310KB) Download: Download full-size image
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Materials
·
2024
·Vol. 17
·期 19
·4876
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IF 3.1
Hao Li,Feng Chen,Xinyang Wu,Dandan Wang,Yongpeng Ren,Yaru Li
In recent years, there has been significant interest in transition-metal sulfides (TMSs) due to their economic affordability and excellent catalytic activity. Nevertheless, it is difficult for TMSs to achieve satisfactory performance due to problems such as low conductivity, limited catalytic activity, and inadequate stability. Therefore, a catalyst with a heterostructure constituted of a nickel–iron-layered double hydroxide, nickel sulfide, molybdenum disulfide, and cerium dioxide was designed. At the current density of 10 mA cm−2in an alkaline solution, the catalyst exhibits a HER overpotential of 116 mV. In addition, an overpotential of 235 mV@150 mA cm−2was displayed for OER. The catalyst showed a good retention rate (94.7% for HER, 98.6% for OER) after 160 h stability tests. The excellent electrochemical performance is attributed to the following points: 1. The self-supporting three-dimensional hierarchical structure provides abundant sites, fast ion diffusion channels, and electron transfer paths, and ensures structural stability. 2. The strong interfacial electron interaction between Ni3S2/MoS2heterojunction and NiFe-LDH improves the OER reaction kinetics. 3. The Ce3+and oxygen vacancies in CeO2promote the dissociation of H2O and promote the HER reaction kinetics. This approach paves the way for developing highly efficient electrocatalysts for various electrochemical applications.
研究领域:
材料科学
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电化学
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高影响因子
ELECTROCHIMICA ACTA
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2020
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IF 6.215
Xiangxi Wang,Lei Li,Zhao Wang,Zhuoyan Wu,Min Zhu,Shili Gai,Zhiliang Liu,Piaoping Yang
Boosting stability, durability, and intrinsic activity of electrocatalysts are the world’s concerns in promoting the application of oxygen evolution reaction (OER). Ni is averagely required in efficient electrocatalysts for OER, while Mo is familiar to hydrogen evolution reaction (HER). Herein, we introduce Mo into electrocatalysts for OER and synthesize an echinoids-like MoS 2 @NiS 2 electrocatalyst with unique morphology, which demonstrates rapid reaction kinetics and impressive catalysis activity. Furthermore, the electrocatalyst shows low overpotentials of 356 mV at 100 mA cm −2 as well as a Tafel slope of 82.6 mV dec −1 in alkaline media. Meanwhile, the electrocatalyst has a large double-layer capability ( C dl ) and electrochemically active surface areas (ECSA) values. The OER performances remarkably enhanced with the help of MoS 2 affiliation. Owning to the Ni compounds as the substrate, the catalyst can maintain a good stability in alkaline solution even after 10 h of chronoamperometry test at 1.51 V. Our study proposes a feasible way to obtain a high-efficient and robust OER electrocatalyst for the practical application.
研究领域:
电化学
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材料科学
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能量转换
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催化
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MOLECULES
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2024
·Vol. 29
·期 12
·2925
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IF 4.2
Chongchong Ma,Yixuan Wen,Yuqing Qiao,Kevin Z. Shen,Hongwen Yuan
This article reports a simple hydrothermal method for synthesizing nickel disulfide (NiS2) on the surface of fluorine-doped tin oxide (FTO) glass, followed by the deposition of 5 nm Au nanoparticles on the electrode surface by physical vapor deposition. This process ensures the uniform distribution of Au nanoparticles on the NiS2surface to enhance its conductivity. Finally, an Au@NiS2-FTO electrochemical biosensor is obtained for the detection of dopamine (DA). The composite material is characterized using transmission electron microscopy (TEM), UV-Vis spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The electrochemical properties of the sensor are investigated using cyclic voltammetry (CV), differential pulse voltammetry (DPV), and time current curves in a 0.1 M PBS solution (pH = 7.3). In the detection of DA, Au@NiS2-FTO exhibits a wide linear detection range (0.1~1000 μM), low detection limit (1 nM), and fast response time (0.1 s). After the addition of interfering substances, such as glucose, L-ascorbic acid, uric acid, CaCl2, NaCl, and KCl, the electrode potential remains relatively unchanged, demonstrating its strong anti-interference capability. It also demonstrates strong sensitivity and reproducibility. The obtained Au@NiS2-FTO provides a simple and easy-to-operate example for constructing nanometer catalysts with enzyme-like properties. These results provide a promising method utilizing Au coating to enhance the conductivity of transition metal sulfides.
研究领域:
材料科学
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电化学
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生物传感器
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纳米技术
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医疗诊断
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2021
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IF 4.464
Xiaoyan Chen,Na Cheng,Yuan-Li Ding,Zhigang Liu
Transition metal sulfides have attracted attentions because of their high theoretical capacity for potassium-ion batteries (PIBs). However, there are still many challenges in maintaining long-cycle stability and improving specific capacity owing to the low conductivity of active materials and their large volume changes. Herein, NiS 2 /carbon nanotubes (CNTs) hybrids with a reinforced concrete structure are prepared. In this hybrid, one part of CNTs is covered in the interior of the NiS 2 microspheres, while the other part is distributed on the surface of the microspheres. Among them, CNTs with a flexible skeleton embedded in NiS 2 microspheres act as rebar, and NiS 2 with high theoretical capacity acts as concrete. This design effectively buffers the structural strain of NiS 2 and ensures the close interconnection between each nano-building blocks, which not only improves the structural stability, but also facilitates the full utilization of active materials. Meanwhile, the CNTs distributed on the surface of the NiS 2 microspheres are interconnected into a network structure, which provides a highly conductive carbon support for the active material, accelerates the electron transfer on the interface and promotes the effective mass transfer of potassium ions. As anode for PIBs, NiS 2 /CNTs hybrids show attractive rate performance (469.4 mAh g −1 at 50 mA g −1 and 250.8 mAh g −1 at 2000 mA g −1 ) and superior cycling stability with capacity retention of 81.2% (reversible capacity of 353.3 mAh g −1 at 100 mA g −1 after 200 cycles), 7 times higher than that of pristine NiS 2 . The design method of NiS 2 /CNTs hybrids can offer an efficient strategy for resolving the large volume fluctuation of metal sulfides in energy storage applications.
研究领域:
材料科学
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能源存储
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2026
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IF 19.9
Mengjia Shi,Zirui Jia,Shuang Xu,Zhenguo Gao,Guanglei Wu
Constructing heterogeneous structures to precisely regulate the interface characteristics and loss mechanisms of materials is the key to performance improvement. This study proposes a strategy of constructing the NiS 2 -CdS P-N heterojunction with Porous carbon nanofibers (PCNFs) as the supporting skeleton, and deeply investigates the influence of the interface regulation mechanism of the P-N heterojunction on the absorption performance. The study clarified the structural reconstruction information such as bond parameter distortion, atomic occupation deviation, and lattice disorder caused by the Built-in electric field (BIEF) of the P-N heterojunction through X-Ray Diffraction (XRD) refinement. With the help of Density functional theory (DFT) calculation, the performance regulation mechanism of the heterojunction was revealed at the atomic/electronic scale. A carrier migration model between NiS 2 and CdS was constructed, and the absorption mechanism was analyzed. By utilizing the BIEF and space charge region formed by NiS 2 and CdS, the equivalent impedance is regulated. Ultimately, the cooperative optimization of material impedance matching and energy dissipation is achieved, providing new ideas and development of high-performance electromagnetic wave (EMW) absorbing materials. This research provides theoretical support for the subsequent shift of absorbing materials from empirical synthesis to precise design.
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International Journal of Minerals Metallurgy and Materials
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2026
·Vol. 33
·期 5
·1371-1385
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IF 8.8
Zhao Ruolin,Li Jun,Ding Sizhi,Fan Yi,Liu Haizhen,Guo Jin,Lan Zhiqiang
We employed a one-step hydrothermal method to in situ grow spherical NiS 2 nanoparticles on the surface of MXene, successfully constructing a NiS 2 –MXene hybrid composite. This study demonstrates that the integration of a NiS 2 –MXene hybrid composite into MgH 2 substantially improves its hydrogen storage performance. Specifically, the composite reduces the initial dehydrogenation temperature of MgH 2 by 118°C, lowering it from 310°C (pure MgH 2 ) to 192°C. At 300°C, it can release 5.87wt% of hydrogen within 12 min. Furthermore, it demonstrates the ability to absorb hydrogen under ambient temperature conditions, with approximately 2.96wt% of hydrogen being absorbed as the temperature increases from room temperature to 50°C. The activation energies for hydrogenation and dehydrogenation of the NiS 2 –MXene–MgH 2 composite reduced by 33.7 and 40.6 kJ·mol −1 , respectively, in comparison to those of pure MgH 2 . Mechanistic studies demonstrate that NiS 2 –MXene enhances hydrogen storage performance through multiple synergistic effects. Specifically, the multivalent titanium in MXene establishes efficient electron transport pathways, promoting hydrogen binding and dissociation. Moreover, the in situ formation of Mg 2 Ni/Mg 2 NiH 4 and MgS creates numerous phase interfaces, offering abundant active sites that facilitate both the dissociation and recombination of hydrogen molecules. Furthermore, the high specific surface area of MXene effectively inhibits agglomeration between the catalyst and Mg/MgH 2 , thereby maintaining structural stability and reactivity.
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Surfaces and Interfaces
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2026
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IF 6
Jiahui Fan,Fengxiang Liang,Qingshuo Liu,Zongyuan Cao,Zhuo Zhang,Bin Chen,Peng Zhang
S-CeNiFe LDH/NiS 2 enhances the durability of seawater splitting. • Sacrificial NiS 2 nanoparticles protect catalyst from Cl- corrosion. • Sulphuration and Ce atoms mitigate the loss of Ni/Fe during seawater splitting. • Downshifted d-band optimizes the OER and suppresses ClER. The development of efficient and stable electrocatalysts to overcome chloride corrosion is crucial for sustainable hydrogen production via alkaline seawater electrolysis. Herein, a Ce-doped NiFe LDH heterostructure (S-CeNiFe LDH/NiS 2 ) was synthesized and exhibited enhanced bifunctional activity for both the oxygen and hydrogen evolution reactions (OER/HER) in alkaline seawater (1 M KOH + natural seawater), along with seawater corrosion resistance by the sacrificial NiS 2 nanoparticles. The optimized S-Ce 0.4 NiFe LDH/NiS 2 requires low overpotentials of only 310 mV for OER and 290 mV for HER at 100 mA cm -2 , surpassing both unsulfurated CeNiFe LDH and bare NiFe LDH. It also shows smaller Tafel slopes and maintains excellent stability over 100 h with minimal decay. The sacrificial role of NiS 2 in protecting LDHs is confirmed by its structural and chemical evolution alongside attenuated seawater decomposition. Performance enhancement stems from heterostructure synergy: expanded surface area, accelerated charge transfer, Ce doping-induced electronic modulation, and conductive NiS 2 for HER. This work addresses critical challenges in direct seawater splitting for scalable hydrogen production. Download: Download high-res image (264KB) Download: Download full-size image
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NEW JOURNAL OF CHEMISTRY
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2024
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IF 2.7
Junde Zhang,Xuejiao Xu,Dandan Liu,Aoze Wang,Shunyi Zhu,Guangming Nie
Transition metal sulfides (TMS) have garnered increasing attention in recent years as promising alternatives to traditional noble metal-based electrocatalysts for hydrogen evolution. In this paper, Mn-NiS2 nanocomposites were synthesized via a one-step hydrothermal method. The incorporation of manganese into transition metal sulfides improved the surface active area and conductivity of the nanoparticles, creating additional hydrogen evolution sites and enhancing their catalytic performance. The results showed that the Mn0.5-NiS2 electrode exhibited good catalytic performance and stability in alkaline environments. Mn0.5-NiS2 electrode showed an overpotential of only 111 mV at a current density of 100 mA cm-2 (η100=111mV), while it could be operated stably for 100 h at a constant voltage density of 100 mV cm-2. This work provides a simple and feasible approach for electrocatalytic materials for effective hydrogen evolution in alkaline environments.
研究领域:
材料科学
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能源化学
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
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IF 9.2
Yang Guo,Shuqin Yuan,Xinnian Xia,Shuaijun Pan,Zhenfei Yang
Crystal plane engineering and the piezoelectric effect show promise for enhancing hydrogen evolution reaction performance, yet potential synergistic effects between them remain unclear. In this study, NiS 2 /CdS composites dominated by CdS (002) crystalline facet were successfully synthesized and used for piezoelectric photocatalytic hydrogen evolution. Under piezoelectric conditions, CdS72 with a high (002) facet ratio demonstrated a 4.56 times improvement in hydrogen evolution performance compared to pure light irradiation, while CdS24 with a lower (002) facet ratio showed a 2.8 times enhancement. Notably, the optimized sample NiS 2 -5/CdS72 reached a piezoelectric photocatalytic hydrogen evolution rate of 15.67 mmol g −1 h −1 , which is 4.54 times higher than that of NiS 2 -5/CdS24 with pure irradiation. Through piezoelectric force microscopy (PFM) and finite element simulations, we revealed that the (002) enriched CdS72 generates stronger piezoelectric fields, which synergistically accelerate photogenerated charge separation as evidenced by enhanced piezoelectric photocurrent responses. The combination of the piezoelectric effect and crystalline face engineering enables structural design and broad application of highly active photocatalysts.
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Sustainable Energy & Fuels
·
2021
·Vol. 5
·期 6
·1801-1808
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IF 6.367
Jie Yu,Tao Zhang,Changchang Xing,Xuejiao Li,Xinyang Li,Bo Wu,Yue Li
We develop a facile method to improve the OER performance of NiS2 nanospheres by coupling ferrous phosphite and phosphide (simply abbreviated as Fe-P) with NiS2. The as prepared NiS2/Fe-P nanospheres possess abundant interfaces which can not only enrich the electroactive sites but also promote electronic transfer, thus further facilitating intrinsic activity for the OER. Consequently, optimal NiS2/Fe-P exhibits outstanding OER activity with an ultralow overpotential of only 218 mV at a current density of 10 mA cm−2 and a Tafel slope of 47.5 mV dec−1. More importantly, it can achieve a relatively high current density of 800 mA cm−2 with an overpotential of only 306 mV, as well as pretty good stability after 160 h testing, which is beneficial for practical applications.
研究领域:
材料科学
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电化学
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高影响因子
危险品化学品经营许可证（带存储）