JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 1
·016518
·
IF 4.386
Songmin Lin,Yuan Yu,Dongfeng Sun,Fangyou Meng,Wenhui Chu,Jie Ren,Linyin Huang,Qingmei Su,Shufang Ma,Bingshe Xu
NiS2 nanoparticle electrocatalysts grown on sulfur and nitrogen co-doped reduced graphene oxide (NiS2/S,N-rGO) were explored. Since the hybrid catalyst of NiS2/S,N-rGO had a large surface area and high conductivity, it demonstrated outstanding electrocatalytic properties. This NiS2/S,N-rGO hybrid electrocatalyst required only 95 mV overvoltage to reach the current density of 10 mA cm−2 in hydrogen evolution reaction (HER) in acidic solution. In addition, the 5000 cycles test experiment showed the excellent HER electrochemical stability of the NiS2/S,N-rGO catalyst. This work also provided new strategies for increasing the catalytic activity of non-precious metal electrocatalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Nano Research
·
2017
·Vol. 11
·期 2
·1004-1017
·
IF 7.354
Wu Tianxing,Zhu Xiaoguang,Wang Guozhong,Zhang Yunxia,Zhang Haimin,Zhao Huijun
Electrocatalytic synthesis of value-added chemicals is attracting significant research attention owing to its mild reaction conditions, environmental benignity, and potentially scalable application to organic synthetic chemistry. Herein, we report the preparation of a single-crystalline NiS 2 nanostructure film of ∼ 50 nm thickness grown directly on a carbon fiber cloth (NiS 2 /CFC) by a facile vapor-phase hydrothermal (VPH) method. NiS 2 /CFC as an electrocatalyst exhibits activity for both the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) in alkaline media. Furthermore, a series of alcohols (2-propanol, 2-butanol, 2-pentanol, and cyclohexanol) were electrocatalytically converted to the corresponding ketones with high selectivity, efficiency, and durability using the NiS 2 /CFC electrode in alkaline media. In the presence of 0.45 M alcohol, a remarkably decreased overpotential (∼ 150 mV, vs. RHE) at the NiS 2 /CFC anode compared with that for water oxidation to generate O 2 , i.e., the OER, in alkaline media leads to significantly improved H 2 generation. For instance, the H 2 generation rate in the presence of 0.45 M 2-propanol is almost 1.2-times of that obtained for pure water splitting, but in a system that employs an applied voltage at least 280 mV lower than that required for water splitting to achieve the same current density (20 mA·cm –2 ). Thus, our results demonstrate the applicability of our bifunctional non-precious-metal electrocatalyst for organic synthesis and simultaneous H 2 production.
研究领域:
材料科学
·
电化学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Jingjing Yuan,Ling Jiang,Jianfei Che,Guangyu He,Haiqun Chen
Electrode material plays a critical role in both electrochemical energy storage and sensors, and there is an urgent need to develop novel electrode materials with high reactivity and catalytic activity. Herein, a multicomponent NiS2/MoS2/rGO electrode nanomaterial consisting of self-stacking NiS2 microblocks, hydrangea-like MoS2 nanosheets, and ultrathin reduced graphene oxide (rGO) nanolayers is synthesized via a facile two-step hydrothermal process. The ingenious combination of NiS2, MoS2, and rGO provides the nanocomposite good capacitance and sensitivity in electrochemical applications. As a result, the NiS2/MoS2/rGO nanocomposite exhibits a good specific capacitance of 645.3 F g–1 at 0.5 A g–1 and rate performance of 126.7 F g–1 at 10 A g–1. The assembled asymmetric supercapacitor of NiS2/MoS2/rGO//activated carbon delivers a high energy density of 19.4 Wh kg–1 at a power density of 156.1 W kg–1 for electrochemical energy storage. In addition, the electrochemical sensor based on a NiS2/MoS2/rGO nanocomposite modified onto glassy carbon electrode (GCE) shows superior activity toward detection of bisphenol A (BPA) compared with other reported electrochemical sensors. A wide linear range of 0.02–200 μM and a low detection limit of 2.1 nM can be obtained under the optimal conditions. This work provides insights into the development of multicomponent NiS2/MoS2/rGO electrode nanomaterial, including its facile synthesis method, good specific capacitance, and ultrasensitive detection of BPA, that exhibits bifunctional electrochemical applications.
研究领域:
材料科学
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电化学
·
环境分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Xiaoyan Wang,Shuangqing Sun,Meng Cheng,Lan Chen,Zhenyu Wang,Jingjie Dai
The triiodide reduction reaction (IRR) of dye-sensitized solar cells (DSSCs) and hydrogen evolution reaction (HER) of overall water splitting both face slow charge transfer, leading to lower efficiency. Herein, a multifunctional NiS 2 /Ni 9 S 8 nanocube electrocatalyst, exhibiting efficient power conversion efficiency and improved H∗ adsorption and desorption performance, is designed through sulfur ion exchange and fluorine ion etching NiCo prussian blue analog precursor. As a result, NiS 2 /Ni 9 S 8 with a matchable interface as counter electrode (CE), exhibits highly improved DSSC performance in I 3 − electrolyte, achieving a power conversion efficiency (PCE) of 9.31 %. This is mainly attributed to heterostructured interface of NiS 2 /Ni 9 S 8 , which modulates the electrons transfer from the Ni atom to I 3 − ions, activating the Ni-I bond and accelerating IRR. Additionally, NiS 2 /Ni 9 S 8 enhances HER performance in both acidic and alkaline electrolytes. Specifically, NiS 2 /Ni 9 S 8 nanocube shows low overpotentials of 117 mV and 111 mV at the current density of 10 mA cm −2 in 1 M KOH and 0.5 M H 2 SO 4 , respectively. This research develops noble-metal-free bifunctional electrocatalysts for clean and renewable energy conversion systems.
研究领域:
材料科学
·
能源转换技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2023
·
IF 7.3
Hao Zhang,Qing Zhang,Guang-Ren Qian,Hong Liu,Jia Zhang,Yang Yue,Chen-Qi Gao,Wen-ying Li,Rui-Sen Jing
A series of new NiS 2 -MoS 2 - x ( x = 0–0.5) sphere-flower hybrids with different Ni/Mo molar ratios, synthesized via a one-pot hydrothermal method, were used as catalysts for hydrodesulfurization (HDS) of thiophene (TP) and 4,6-dimethyl-dibenzothiophene (4,6-DMDBT). The characterizations show that the microstructure of MoS 2 , including the size of MoS 2 nano-flowers, the length of MoS 2 slabs, and the number of defects, was regulated by changing Ni/Mo ratios. Increasing the Ni/Mo ratio in the NiS 2 -MoS 2 - x catalysts significantly boosts their HDS activity, with the optimum ratio being 0.2. In addition, the NiS 2 -MoS 2 -0.2 catalyst exhibits the best direct desulfurization performance, which is associated with the minimum ratio of average slab length ( L av ) to average stacking number ( N av ) as well as the highest concentration of Ni-promoted Mo sites and sulfur vacancies. Moreover, Ni-containing NiS 2 -MoS 2 - x catalysts, characterized by a highly stable sphere-flower configuration, exhibit superior structural stability and catalytic durability than the Ni-free NiS 2 -MoS 2 -0 catalyst.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Tianli Zhang,Mengrong Wu,Hui Gu,Haiwei Yu,Ming Zhou,Xingmei Guo,Yuanjun Liu,Xiangjun Zheng,Qinghong Kong,Junhao Zhang
To address the challenges associated with significant volume expansion and limited electronic conductivity of transition metal sulfides (TMSs) as anode materials in lithium-ion batteries. Nitrogen doped carbon (NC) and carbon nanotubes (CNTs) modified CoS 2 /NiS 2 (Co-Ni-S/NC/CNTs) composites were prepared by a simple chemical precipitation method and sulfurization reaction. Co-Ni-S/NC/CNTs composites have special structure, utilizing NC as carrier and CNTs as cladding layer . When evaluated as anode materials for lithium-ion batteries, the initial discharge specific capacity of Co-Ni-S/NC/CNTs anode delivers 1518.8 mAh g −1 at 0.1 A g −1 , and a high reversible capacity of 1137 mAh g −1 is kept after 100 cycles, which is higher than the discharge specific capacity (1117.1 mAh g −1 ) of the second cycle. At a current density of 0.5 A g −1 , a capacity of 468 mAh g −1 is maintained after 300 cycles. The excellent cycling stability of the CoS 2 /NiS 2 anode can be primarily attributed to that CNTs layer can enhance the conductivity of CoS 2 /NiS 2 , and the incorporation of NC can effectively improve the infiltration of electrolytes. Meanwhile, the synergistic action of CNTs and NC can mitigate the volume expansion during charging and discharging processes.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Energy
·
2017
·
IF 0
Jianmei Wang,Xiao Ma,Tingting Liu,Danni Liu,Shuai Hao,Gu Du,Rongmei Kong,Abdullah M. Asiri,Xuping Sun
The sluggish kinetics of water oxidation has severely hindered the energetic convenience of electrochemical water splitting. In this work, we describe our recent finding that NiS 2 nanosheet array on Ti mesh (NiS 2 /TiM) is a superior catalyst for hydrazine oxidation reaction (HzOR) with the demand of potential of 218 mV to drive 300 mA cm −2 in 1.0 M KOH with 0.5 M hydrazine. Interestingly, its high activity toward hydrogen evolution reaction enables it as a bifunctional catalyst for energy-efficient electrolytic hydrogen generation, and the two-electrode alkaline electrolyzer using NiS 2 /TiM as both anode for HzOR and cathode for HER needs a cell voltage of only 0.59 V to attain 50 mA cm −2 , 1.34 V less compared with pure water splitting to achieve the same current density, promising the use of such 3D catalyst electrode toward energy-saving electrochemical production of hydrogen fuels .
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Wei Mao,Liguo Wei,Xiaohu Xu,Lishuang Zhao,Junyun Liu,Zihan Zhang
To screen out suitable electrode materials and overcome the shortcomings of the existed electrode materials for the application in dye-sensitized solar cells and supercapacitors , NiS 2 /reduced graphene oxide (NiS 2 /rGO) composite material was prepared by a simple one-step hydrothermal method in this paper and applied in the field of both dye-sensitized solar cells and supercapacitors as electrode material. In an electrolyte of 6 M KOH, the NiS 2 /rGO composite material with bilayer capacitance characteristics exhibited a high specific capacitance of 259.20 F g −1 at the current density of 0.6 A g −1 , which was significantly higher than that of rGO (188.94 F g −1 ). Moreover, at a current density of 2 A g −1 , the NiS 2 /rGO composite material had 92.85% capacitance retention after 2000 cycles. When applied as counter electrode material for the dye-sensitized solar cells, the NiS 2 /rGO composite material counter electrode exhibited a satisfactory photoelectric conversion efficiency ( η ) of 3.16% under standard simulated sunlight (AM 1.5 G), which was significantly higher than that of single rGO counter electrode (improved by 90.40%). The NiS 2 /rGO composite electrode material prepared by a simple one-step hydrothermal method is a potential bi-functional composite electrode materials for both dye-sensitized solar cells and supercapacitors.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2023
·
IF 3.8
Senyang Wang,Jie Sun,Zixin Wang,Qian Zhang,Rao Fan,Wenming Zhang,Ling Li
NiS 2 -FeS 2 composite material is uniformly coated on CNFs by a one-step hydrothermal method with carbon nanofibers (CNFs) prepared by the electrostatic spinning method. A composite NiS 2 -FeS 2 /CNFs with Ti-mesh substrate counter electrode (NiS 2 -FeS 2 /CNFs CE) is prepared by scraping and coating method on a metal titanium mesh and applied to quantum dot sensitized solar cells (QDSSCs). The photoelectric power conversion efficiency of QDSSCs assembled on NiS 2 -FeS 2 /CNFs electrode substrate is 9.85%, which is much higher than that of traditional Cu 2 S/brass (7.85%). The exceptional achievement can be attributed to the superb amalgamation of the Ti-mesh's excellent electrical conductivity and the NiS 2 -FeS 2 /CNFs nanostructure's high and stable catalytic activity. The co-loading of NiS 2 and FeS 2 reduces the particle size of the composite, enhancing the specific surface area of the counter electrode. It provides abundant catalytic active sites for QDSSCs. The experimental results show that NiS 2 -FeS 2 is expected to be a competitive and efficient QDSSCs CE material.
研究领域:
材料科学
·
纳米技术
·
太阳能
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Feifei Lin,Renren Tian,Pei Dong,Guofei Jiang,Fengting He,Shuaijun Wang,Rongbing Fu,Chaocheng Zhao,Ying-Ying Gu,Shaobin Wang
Photoelectrochemical (PEC) reaction with efficient, stable, and cost-effective photocathodes using non-precious metals will be one of the most environmentally friendly technologies for hydrogen (H 2 ) generation under the worldwide pressure for carbon neutrality. Herein, a new 3-dimentional (3D) SiNWs@MoS 2 /NiS 2 photocathode was designed and synthesized. Defect-rich MoS 2 /NiS 2 nanosheets on silicon nanowires (SiNWs) provide more active sites to promote charge transfer and photo-generated electron-hole separation. Meanwhile, the 3D structure of the photocathode provides an effective charge transfer mode and an open channel for rapid H 2 release. The SiNWs@MoS 2 /NiS 2 photocathode exhibits the maximum photocurrent density (21.4 mA·cm −2 at 0.9 V vs. RHE), highest H 2 production rate (183 μmol·h −1 ), smallest diffusion resistance (34.7 Ω), and excellent catalytic stability for more than 10 h at pH = 7. Based on density function theory calculation, the MoS 2 /NiS 2 nanosheets are conducive to chemical adsorption of H 2 intermediates, which are crucial for the maintenance of the composite photocathode in PEC H 2 production.
研究领域:
材料科学
·
能源科学
·
光电化学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IONICS
·
2020
·Vol. 26
·期 9
·4499-4510
·
IF 2.394
Liu Jian,Xu Ying-Ge,Kong Ling-Bin
Herein, molybdenum trisulfide/nickel disulfide-reduced graphene oxide (Mo 2 S 3 /NiS 2 -RGO) composites as anode material for sodium-ion batteries (SIBs) and sodium-ion capacitors (SICs) were synthesized by one-step facile hydrothermal method. Through electron microscopy analysis, it could be observed that the Mo 2 S 3 /NiS 2 nano-rods and nano-balls were dispersed uniformly over the two-dimensional RGO sheets. When tested as an anode material, Mo 2 S 3 /NiS 2 -RGO showed a considerable reversible capacity of 653.1 mA h g −1 at 100 mA g −1 after 50 cycles and capacity retention of 197.5 mA h g −1 at 5000 mA g −1 after 226 cycles. The sodium storage mechanism of Mo 2 S 3 /NiS 2 -RGO was explained by ex situ XPS. Furthermore, as-fabricated SICs delivered an excellent specific energy of 182.7 W h kg −1 (at 1120 W kg −1 ), and SIBs exhibited the discharge capacities of 85 mA h g −1 at 2 C. Overall, the superior electrochemical performances of Mo 2 S 3 /NiS 2 -RGO demonstrated that it was a promising anode materials to construct high-performance full cell.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Hao Zhang,Rui Zeng,Shou-Cong Dong,Shu-Ting Zhang,Pei-Pei Chen,Dong-Lin Zhao
To effectively address the critical challenges of pronounced volumetric expansion and intrinsic low electrical conductivity in bimetallic sulfide anodes for sodium-ion batteries (SIBs). In this study, a cobalt-based MOF (ZIF-67) was employed as the precursor material to synthesize heterostructure CoS 2 /NiS 2 composites via a co-precipitation method and hydrothermal vulcanization process. This heterostructure design not only enhances ionic conductivity but also endows the material with exceptional cycling stability, and the well-defined hollow structure provides a high specific surface area with abundant active sites for efficient sodium storage. As a SIBs anode, the composite delivered an initial discharge capacity of 936.8 mAh g −1 at 0.1 A g −1 . After 100 cycles, it retained 704.1 mAh g −1 with 99 % Coulombic efficiency, highlighting exceptional capacity retention. Notably, at 5.0 A g −1 , the material sustained 386.6 mAh g −1 after 250 cycles, further confirming its superior sodium storage capability. This work offers a promising design strategy for advanced SIBs anodes by leveraging heterostructure engineering to simultaneously enhance stability and kinetic performance.
研究领域:
材料科学
·
储能
·
电化学
·
纳米材料
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）