International Journal of Electrochemical Science
·
2023
·Vol. 12
·期 5
·4610-4618
·
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
·
能源化学
·
纳米材料
·
电化学
·
光伏器件
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Xian Yang,Ling Leng,Gaoqun Zhang,Zhanfeng Deng,Jun Cheng
The development of efficient non-precious electrocatalysts for the alkaline hydrogen evolution reaction (HER) is critical for industrial water electrolysis. Herein, an amorphous NiS/crystalline Co 3 O 4 heterostructure (NiS/Co 3 O 4 @CP) is fabricated through a scalable two-step electrodeposition. The heterogeneous interface induces electron transfer from Co 3 O 4 to NiS, creating electron-rich NiS sites for optimized H* adsorption/desorption and high-valence Co 3+ species for accelerated water dissociation. The NiS/Co 3 O 4 @CP catalyst exhibits low overpotential of 60 mV at 10 mA cm −2 in 1 M KOH (25 °C) and maintains durability for 1000 h. Under industrial conditions (80 °C, 6 M KOH), the NiS/Co 3 O 4 @CP also exhibits an overpotential of merely 285 mV at 500 mA cm −2 . In a two-electrode electrolyzer, the NiS/Co 3 O 4 @CP//Ni mesh configuration attains a current density of 500 mA cm −2 at a voltage of merely 1.9 V. This work provides a practical strategy for high-performance HER catalysts.
研究领域:
电催化
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能源材料
·
纳米材料
·
界面化学
·
可持续能源技术
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
2026
·
IF 2.6
Song Ruili,Miao Xianhua,Fan Jikai,Ni Cong
The primary limitations of the oxygen evolution reaction (OER) electrocatalysts stem from poor electrical conductivity and insufficient accessibility of active sites. So highly productive catalysts are vital to lower the overpotential and enhance the kinetics of the sluggish OER. In this work, we present an effective OER electrocatalyst (NiS/N-CNT@Ni) and composites of Ni nanoparticles encapsulated in NiS/N-CNT fabricated via a simple two-step thermal treatment method. Meanwhile, due to the synergistic effect between NiS and nitrogen-doped carbon nanotubes (CNTs) and Ni, the NiS/N-CNT@Ni composites show higher OER electrocatalytic activity and better durability than commercial RuO 2 catalysts. Compared to commercial RuO 2 , the NiS/N-CNT@Ni catalyst demonstrates a lower overpotential (313 mV at 10 mA cm −2 ) and better stability. This study confirms that the NiS/N-CNT@Ni material not only exhibits a low overpotential but also presents a scalable, cost-effective synthesis strategy for high-performance composites applicable to energy conversion and storage.
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产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2016
·
IF 2.435
Yongji Xin,Yan Lu,Changcun Han,Lei Ge,Ping Qiu,Yujing Li,Siman Fang
In this paper, ultrathin 2D TiO 2 nanosheets which modified with ultrafine dispersions of NiS cocatalyst were successfully prepared via a low-cost and in-situ synthesis approach. The physical and chemical properties of the as-obtained NiS/TiO 2 nanosheets samples were investigated by a variety of analytical techniques. Cooperated with the photocatalytic hydrogen evolution tests and surface photovoltage spectroscopy (SPV) experiments, it can be deduced that the NiS is an efficient cocatalyst, which significantly limited the recombination of photogenerated electron-hole pairs in ultrathin 2D TiO 2 nanosheets and consequently improve the hydrogen evolution activity. The influence of different molar ratios of NiS on the photocatalytic activity was explored and the 5 mol% NiS/TiO 2 composite photocatalyst showed the highest photoactivity which the corresponding H 2 -production rate was 313.6 μmol h −1 g −1 under the UV–vis light irradiation. The optimal H 2 evolution rate is 36 times as much as the value of pure TiO 2 nanosheets. The photocatalytic mechanism of NiS cocatalysts on the enhanced performance of the photocatalytic activity of TiO 2 nanosheets is proposed and confirmed by SPV results.
研究领域:
材料科学
·
光催化
·
纳米材料
·
氢能
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DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Zhe Li,Chun-yong Zhang,Hao-yu Wang,Lin Zhu,Hai-tao Liu,Li Shu,Ying-pin Weng
Herein, a simple hydrothermal method was used to synthesize cobalt hydroxide/nickel sulfide and cobalt foam (Co(OH) 2 /NiS@CF) composite electrode. By simply heating cobalt foam in the aqueous solution containing cobalt nitrate, nickel nitrate, and thiourea, Co(OH) 2 /NiS nano stereoscopic website was synthesized on Cobalt foam. X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), and electrochemical tests were used to characterize these composite electrodes. When the molar ratio of Co(NO 3 ) 2 ·6H 2 O to Thiourea of 4:5, Co(OH) 2 /NiS@CF exhibits excellent performance under these tests. The specific capacitance was 1260 F/g at 1.0 A/g. The composite electrode had 92.3% capacitance retention after 2000 charge-discharge cycles at 1.0 A/g.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Zhenwei Wan,Yueqi Zhang,Qinglin Ren,Xueru Li,Haitao Yu,Wenkai Zhou,Xinbin Ma,Cuijuan Xuan
Developing highly efficient bifunctional non-noble metal-based electrocatalysts is pivotal to fulfilling practical water electrolysis. In this work, NiS/NiCo 2 S 4 heterostructured electrocatalysts are prepared through a simply controlling sulfurization process by employing a one-pot solvothermal strategy. The alteration of cobalt addition amount can affect the crystalline phase, morphology, and catalytic activity of the resulting heterostructured materials. The successful integration of NiS with NiCo 2 S 4 is realized by deliberately tuning the cobalt addition amount. The resulting Co-Ni-S 5:1 delivers high activity with low overpotentials of 198 and 259 mV to attain 10 mA cm −2 when used as electrocatalysts toward hydrogen evolution reaction and oxygen evolution reaction, respectively. Experimental and theoretical calculations evidence the strong interface coupling between NiS and NiCo 2 S 4 leads to increased electronic conductivity, electron migration near lattice-matched interface and interfacial charge redistribution, thereof enhancing the reaction kinetics rate and activity. Moreover, the potential application is demonstrated by employing Co-Ni-S 5:1 in a two-electrode electrolyzer which can efficiently catalyze water electrolysis and work stably for 100 h. This work not only provides highly efficient bifunctional heterostructured electrocatalysts by simply regulating the metal components in sulfides but also further broadens the application of interface engineering.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Mengzhao Liu,Wenguang Cui,Zhe Sun,Chaofan Zhang,Chaozhen He,Benxue Zou,Ping Geng,Zhongkui Zhao
Transition metal sulfides have been verified as effective precatalysts for OER in alkaline conditions, and the in-situ reconstructed metal (oxy)hydroxides on their surface were the real active sites. The rational reconstruction can regulate the amount and chemical state of the metal (oxy)hydroxides and thus promote the OER performance efficiently, but also remains a challenge. Herein, we report a unique rationally controllable in-situ anodic electrochemical activation (AEA) strategy to promote the surface reconstruction for the formation of amorphous NiOOH layer onto the P-doped NiS nanorod arrays on nickel foam (P-NiS@NiOOH-aea/NF). The doping of P atom promotes the dissolution of S and accelerates the reconstitution of NiOOH on its surface. The optimized P-NiS@NiOOH-aea/NF through the unique AEA strategy exhibits outstanding OER activity requiring ultra-low overpotentials of 203 and 349 mV to reach 10 and 1000 mA cm −2 , respectively, together with robust electrocatalytic stability and satisfactory selectivity (nearly 100% Faraday efficiency) in 1.0 M KOH solution. The density functional theory (DFT) calculations further demonstrate that heteroatomic P-doping reduces the adsorption free energy of intermediate species and enhances the OER intrinsic activity of adjacent nickel active site. This work has a guiding significance for the rational design of introducing anions in the in-situ reconstruction process.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2023
·Vol. 13
·期 6
·983
·
IF 3.9
Huajin Qi,Chenyu Wang,Luping Shen,Hongmei Wang,Yuan Lian,Huanxia Zhang,Hongxia Ma,Yong Zhang,Jin Zhong Zhang
α-NiS/g-C3N4nanocomposites were synthesized and used for photocatalytic hydrogen (H2) evolution and tetracycline hydrochloride (TC) degradation. The fabricated nanocomposites were characterized by XRD, XPS, SEM, TEM, UV-vis DRS, TRPL, and PEC measurements. Photocatalytic studies show that the hydrogen generation rate of the 15%-α-NiS/g-C3N4nanocomposite reaches 4025 μmol·g−1·h−1and TC degradation rate 64.6% within 120 min, both of which are higher than that of g-C3N4. The enhanced performance of the nanocomposite is attributed to the formation of a heterojunction between α-NiS and g-C3N4that enhances visible light absorption, promotes the separation and transfer of charges, and inhibits the recombination of carriers. The photocatalytic mechanism of the α-NiS/g-C3N4heterojunction nanocomposite is discussed in terms of relevant energy levels and charge transfer processes.Keywords:photocatalysis;g-C3N4;surface modification;photodegradation;hydrogen evolution
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2018
·Vol. 411
·期 1
·129-137
·
IF 3.307
Liu Hongying,Ma Huan,Xu Hanxiao,Wen Jiajun,Huang Zhiheng,Qiu Yubin,Fan Kai,Li Dujuan,Gu Chunchuan
Hollow, porous NiS nanocubes were prepared by a hydrothermal method starting from Ni–Co Prussian blue analogue nanocubes as the template. The morphology and structure of the NiS nanocubes were tuned by adjustment of the ion-exchange rate and the degree of chemical etching, and they were characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, transmission electron microscopy, X-ray diffraction, and nitrogen sorption measurements. The NiS nanocubes are shown to act as a peroxidase mimic that can catalyze the oxidization of 3,3′,5,5′-tetramethylbenzidine by hydrogen peroxide (H 2 O 2 ), producing a visible color change, for which the absorbance is best measured at 652 nm. The outstanding activity may result from the unique structure of the NiS nanocubes. The catalytic oxidation follows Michaelis–Menten kinetics and shows a ping-pong mechanism of enzyme action. The findings were used to develop a rapid, sensitive, and selective colorimetric H 2 O 2 assay with a response that is linear in the 4–40 μM range with a detection limit of 1.72 μM (signal-to-noise ratio of 3).
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研究领域:
材料科学
·
分析化学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Weibo Huang,Zhouyu Tong,Yuxin Bi,Mingliang Ma,Zijian Liao,Guanglei Wu,Yong Ma,Siyu Guo,Xiaoyu Jiang,Xueping Liu
Herein, coralloid core-shell structure NiS/Ni 3 S 4 @PPy@MoS 2 nanowires were elaborately designed and successfully synthesized through a three-step route to obtain exceptional microwave absorption (MA) properties. Ni nanowires were first fabricated, and then used as the substrate to be coated with a layer of PPy . Ni chalcogenides were obtained by using Ni nanowire as sacrificial templates while growing MoS 2 nanorods by hydrothermal method . Both the one-dimensional (1D) core-shell structure and the coralloid surface generated by MoS 2 nanorods were beneficial for the attenuation of microwaves. After investigating the electromagnetic properties of different loading content absorbers (30 wt.%, 40 wt.% and 50 wt.%), it is found that the 50 wt.% loading absorber has the optimal MA performance. The minimum reflection loss (RL min ) value can reach −51.29 dB at 10.1 GHz with a thickness of 2.29 mm, and the corresponding effective absorption bandwidth (EAB, RL < −10 dB) can be up to 3.24 GHz. This research provides a reference for exploiting novel high-efficient 1D absorbers in the field of MA.
研究领域:
材料科学
·
电磁学
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·124637
·
IF 7.5
Qiushuo Hu,Xinle Wang,Fengxia Tong,Xizhuang Liang,Dujuan Dai,Xiaolei Bao,Jianxun Qiu
Photocatalytic reforming of polylactic acid (PLA) plastic into green hydrogen (H 2 ) and high-value chemicals provides a promising approach for addressing environmental and energy issues. However, the rational design of high-performance photocatalysts remains a critical challenge. Herein, a novel NiS/ZnIn 2 S 4 (NS/ZIS) Schottky heterojunction is prepared through the uniform decoration of ZnIn 2 S 4 nanosheets with amorphous NiS. Mechanism studies reveal that the construction of Schottky barrier promotes the electrons transfer from ZnIn 2 S 4 to NiS, achieving efficient H 2 evolution. The photogenerated holes remaining on the surface of ZnIn 2 S 4 possess moderate oxidation activity, which can enable efficient and selective catalytic conversion of waste plastics to pyruvic acid (PA). Consequently, the NS/ZIS composite exhibits outstanding visible-light-driven generation rates of H 2 and PA, reaching 3.81 mmol g −1 h −1 and 2.95 mmol g −1 h −1 , respectively. These values are 4.6-fold and 2.3-fold as high as those acquired from pristine ZnIn 2 S 4 . It also achieves a PA selectivity of 80.6% and an apparent quantum yield of 10.3% at 420 nm. Moreover, the NS/ZIS thin film synthesized via drop-casting has prominent H 2 evolution activity and PA selectivity under natural sunlight exposure, which manifests its promising prospect in practical industrial utilization. This work presents a feasible method for converting waste plastic into H 2 and value-added chemicals, thereby contributing to the mitigation of escalating white pollution.
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产品关联
DOI
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
·
2025
·
IF 3.6
Jian Wang,Xinxin Zhao,Wenda Li,Kehan Liu,Zuyue Tu,Xiangyu Zeng,Zhihui Wang,Yijia Wang,Ting Li,Ming Chen
A green and efficient method for the assembly of N-acylureas through an NIS-promoted Hofmann-type rearrangement has been described. The advantages of this protocol include mild, metal-free conditions, operational simplicity, broad substrate scope, good functional group tolerance, and high chemoselectivity. The potential practicability and synthetic utility were demonstrated by its easy scalability and application in the concise synthesis of commercial pesticides and drugs. The process of the transformation in our work integrates an unconventional acyl transfer mechanism into the well-established framework of the classical Hofmann rearrangement, which enables the direct conversion of 2-oxoamides to acyl isocyanates.
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DOI
PubMed
高影响因子
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