INORGANIC CHEMISTRY COMMUNICATIONS
·
2024
·
IF 4.4
Yuhan Xie,Ke Zhang,Boyu Dong,Ranran Xu,Jinxi Chen,Yongbing Lou
A well-designed composite based on semiconductor materials can effectively reduce the recombination of photo-generated carriers in photocatalysts by establishing efficient charge transfer channels, which enhances the activity of photocatalytic hydrogen evolution for water splitting. Herein, a ZnIn 2 S 4 /NiSe 2 composite with NiSe 2 nanoparticles tightly anchored on the nanosheets-assembled microspheres ZnIn 2 S 4 was elaborated and successfully synthesized by a hot-injection method followed by a successive solvothermal method. The synergistic effects and close contact interface between ZnIn 2 S 4 and NiSe 2 facilitated charge migration. Under visible light irradiation, the optimal ratio of ZnIn 2 S 4 /NiSe 2 composite achieved an outstanding hydrogen evolution rate of 3060 µmol g −1 h −1 (nearly 12.6 times of unmodified ZnIn 2 S 4 ) and exhibited superior stability (no apparent decrease within 20 h) in the presence of a sacrificial agent (triethanolamine). Additionally, various characterizations revealed that the recombination of photo-generated carriers was effectively suppressed, visible-light absorption was significantly enhanced, and interface charge transfer was accelerated, thus endowing the ZnIn 2 S 4 /NiSe 2 composite with superior photocatalytic activity . This research provides illuminating insights into using the non-noble metal-based catalyst NiSe 2 as an effective co-catalyst, significantly improving photocatalytic performance and holding great potential in alleviating energy shortages and environmental pollution problems.
研究领域:
材料科学
·
能源与环境科学
✓ 已验证
产品关联
DOI
高影响因子
ChemSusChem
·
2021
·Vol. 14
·期 7
·1710-1719
·
IF 8.928
Liwei Shi,Hailiang Fang,Xiaoxia Yang,Jie Xue,Caifeng Li,Shifeng Hou,Cheng Hu
Graphical Doping for batteries : Fe-doped NiSe 2 nanosheets grown on activated carbon cloth substrates provide elevated performance as Li−S free-standing cathodes. Fe-doping in NiSe 2 enables improved charge transfer and stronger interactions with the adsorbed sulfur species, as well as higher electrical conductivity. The transformation of Li 2 S 2 /Li 2 S growth from conventional 2D films to 3D particles eliminates the barriers of phase transitions during the cathode redox processes. The commercialization of Li−S batteries is hindered by the shuttling of lithium polysulfides (LiPSs), the sluggish sulfur redox kinetics as well as the low sulfur utilization during charge/discharge processes. Herein, a free-standing cathode material was developed, based on Fe-doped NiSe 2 nanosheets grown on activated carbon cloth substrates (Fe-NiSe 2 /ACC) for high-performance Li−S batteries. Fe-doping in NiSe 2 plays a key role in the electronic structure modulation of NiSe 2 , enabling improved charge transfer with the adsorbed LiPSs molecules, stronger interactions with the active sulfur species and higher electrical conductivity. Effective promotion of the sulfur redox kinetics and enhanced sulfur utilization were achieved under high areal sulfur loadings. The stronger interactions with LiPSs together with the unique 3D structure of Fe-NiSe 2 /ACC also induced the transformation of Li 2 S 2 /Li 2 S growth from conventional 2D films to 3D particles, significantly eliminating the barriers of solid nucleation and growth during the phase transition of liquid LiPSs to solid Li 2 S 2 /Li 2 S. With a high sulfur loading of 9.9 mg cm −2 , the Fe-NiSe 2 /ACC cathode enabled a high area capacity of 9.14 mAh cm −2 with a low average decay of 0.11 % per cycle over 200 cycles at 0.1 C.
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
Advanced Materials Interfaces
·
2021
·Vol. 8
·期 9
·2100052
·
IF 6.147
Lijuan Lai,Fangshu Xing,Chuchu Cheng,Caijin Huang
Hierarchical structure design and use of cocatalyst are effective strategies to improve the photocatalytic performance of semiconductor catalysts. Herein, 0D NiSe 2 nanoparticles decorated 2D ZnIn 2 S 4 ultrathin nanosheet-assembled microflowers using a facile solvothermal approach are synthesized. The as-obtained NiSe 2 /ZnIn 2 S 4 nanocomposites exhibit enhanced visible-light photocatalytic H 2 -evolution activity of 1487 µ mol (g h) –1 , three times higher than that of pure ZnIn 2 S 4 . The hierarchical structure of ZnIn 2 S 4 microflowers exposes more surface-active sites and enhances light harvesting. Meanwhile, the formation of heterojunctions between ZnIn 2 S 4 nanosheets and NiSe 2 nanoparticles creates a space-charge separation region that facilitates the transfer and separation of photoinduced electrons and holes, resulting in improved photocatalytic H 2 production. This work provides a promising strategy for designing and constructing 0D/2D heterojunctions for efficient solar-driven energy conversion.
研究领域:
材料科学
·
纳米技术
·
光催化
·
能源转换
✓ 已验证
产品关联
DOI
高影响因子
Sustainable Energy & Fuels
·
2022
·Vol. 6
·期 23
·5392-5399
·
IF 6.813
Muhammad Rauf,Ling Yang,Jingwen Wang,Hongwei Mi,Qianling Zhang,Peixin Zhang,Xiangzhong Ren,Yongliang Li
Electrodeposition is a facile and scalable strategy to prepare free-standing oxygen evolution reaction (OER) electrodes with promising electrocatalytic activity, high active site utilization, and fast mass transportation. In this study, hierarchical CoSe2–NiSe2 heterostructured nanosheets were electrodeposited on three-dimensional Ni foam (NF) via deliberate interface engineering using a two-step potentiostatic route. Morphological analysis confirms that CoSe2–NiSe2 has a hierarchical nanosheet-like morphology, and the surface is composed of NiSe2 (210) and CoSe2 (210) planes. The heterostructure CoSe2–NiSe2/NF electrocatalyst has a remarkably improved OER performance with a low overpotential of 160 mV at 10 mA cm−2 in alkaline media compared to the monometallic Co-based electrocatalyst CoSe2/NF (290 mV@10 mA cm−2) and Ni-based electrocatalyst NiSe2/NF (310 mV@10 mA cm−2). Thus, the strong interface interaction between CoSe2 and NiSe2 in heterostructured CoSe2–NiSe2/NF is essential for high OER performance. Furthermore, the heterostructured electrocatalyst exhibits high stability during 2000 potential cycles and a 5 h chronoamperometric test. The excellent OER performance is attributed to the high electrochemical active area and synergistic effect of the bimetallic selenide-heterojunction. This work offers a facile and scalable strategy for exploiting synergistic electrocatalysis based on heterostructured electrocatalysts, as well as novel instances for the utilization of efficient, low-cost, and non-toxic electrocatalysts in the water-splitting 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
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Bo Yuan,Jianxun Zhao,Wanqiang Liu,Heng Liu,Peng Chen,Lianshan Sun,Xin Guo,Xinwei Wang,Weixuan Zhang,Rui Zhang,Fang Wang
The introduction of heterostructure in the cathode material of Li-S battery is an effective method to improve the redox reaction kinetics and suppress the shuttle effect of polysulfide . A metal sulfide/metal selenide (NiS 2 /NiSe 2 ) heterostructure with hollow tetrahedral structure is prepared as a sulfur host of lithium-sulfur batteries. The prepared NiS 2 /NiSe 2 heterostructure exhibits efficient charge transfer at the heterojunction interface, thereby enhancing catalytic activity for redox reactions of polysulfides and facilitating their rapid conversion. Moreover, the unique hollow tetrahedral structure, along with abundant surface pores, enables high sulfur loading capacity, providing abundant electrochemical reaction sites to enhance sulfur utilization efficiency. The results demonstrate that the NiS 2 /NiSe 2 heterostructure material exhibits a remarkable initial capacity of 1338.9 mAh/g at 0.2 C, along with exceptional cycling stability (maintaining a capacity of 517.6 mAh/g after 200 cycles at 0.2 C, with only a negligible decay rate of 0.3% per cycle, retaining a capacity of 462.6 mAh/g after 500 cycles at 1 C, with an insignificant decay rate of merely 0.12% per cycle). The facile preparation of this NiS 2 /NiSe 2 heterostructure not only enables the realization of lithium-sulfur batteries with exceptional capacity, but also opens up broader avenues for exploring high-performance heterogeneous materials .
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2025
·
IF 4.7
B. Gayathri Manju,G. Rajkumar,P. Mathan Kumar,B. Muthuraaman,R. Harinivashini,P. Lalitha,K. Prabakaran,D. Balaji
Metal chalcogenides have garnered considerable interest for electronic applications owing to their high electrical conductivity, along with unique structural, optical, and electrochemical properties. In this work, NiSe 2 nanoflakes were synthesized via a simple, low-cost microwave-assisted method, followed by calcination at two different temperatures (200 °C and 400 °C) for 2 h. Structural characterization through X-ray diffraction (XRD) and Raman spectroscopy confirmed the successful formation of cubic-phase NiSe 2 at 400 °C. Detailed morphological and elemental analyses revealed that calcination temperature plays a pivotal role in tuning the nanoflake morphology and surface characteristics. The multifunctional behavior of the NiSe 2 nanoflakes was evaluated for both supercapacitor and solar cell applications. Electrochemical measurements demonstrated a high specific capacitance of 598 F/g at 0.5 A/g, while photovoltaic tests achieved a power conversion efficiency (PCE) of 5.0 %. These results highlight the potential of NiSe 2 nanoflakes as efficient electrode materials for integrated energy storage and conversion devices.
研究领域:
材料科学
·
纳米技术
·
电化学
·
能量存储
·
光伏技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2020
·
IF 16.683
Zong Liu,Chengzhe Zhang,Hui Liu,Ligang Feng
Herein, we highlighted that a catalyst system of NiSe 2 nanoparticle/NiO nanosheet catalyst exhibited efficient synergism for energy and environmental-relevant urea-assisted water electrolysis reactions. The spectral study and microscopic analysis demonstrated the formation of NiSe 2 nanoparticle/NiO nanosheet heterostructure and efficient Ni O bond and Ni Se bond synergism. Owing to various factors such as the strong synergetic coupling effects between NiSe 2 nanoparticle and NiO nanosheet, unique structure features, increased active sites and amount of intrinsic Ni 3+ ions, efficient synergism was found on the NiSe 2 Nanoparticle/NiO nanosheet for urea-assisted water electrolysis by comparing with the NiSe 2 Nanoparticle and NiO nanosheet alone. It required a cell voltage of 1.39 V, about 210 mV less than that of water electrolysis, confirming the less energy consumption during the electrolysis. Notably, it also shows remarkably superior long-term durability. The current work may extend the nanoparticle-nanosheet catalysts system for simultaneous wastewater treatment and clean energy production.
研究领域:
材料科学
·
能源化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Dayu Song,Haiqi Wang,Xinqiang Wang,Bo Yu,Yuanfu Chen
Clean hydrogen energy through water splitting via hydrogen evolution reaction (HER) has attracted much interests. It is significant and urgent to search for low-cost non-noble metal electrocatalysts for highly efficient and stable HER. Herein, for the first time, we present a facile and cost-effective hydrothermal and selenization strategy to synthesize NiSe 2 nanoparticles embedded in carbon nanowires (NiSe 2 /C NWs). As a HER electrocatalyst, the NiSe 2 /C NWs hybrid delivers outstanding catalytic performance with a very low Tafel slope of 38.7 mVdec −1 , a small onset potential of ∼−144 mV (vs RHE), and a high cathode current density of 33 mA cm −2 at −250 mV (vs RHE). Moreover, it also exhibits excellent long-term stability of NiSe 2 /C NWs even after 2000 voltammetric sweeps. The superior HER performance of NiSe 2 /C NWs is attributed to its unique structure constructed by ultrafine NiSe 2 nanoparticles homogenously embedded in highly conductive carbon nanowires, which can not only provide abundant HER active sites, but also enhance the conductivity between the nanoparticles. It suggests that NiSe 2 /C NWs hybrid is a promising candidate to replace noble metal electrocatalysts for HER.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 16
·8113-8120
·
IF 11.301
Jun Zhou,Liwei Yuan,Jingwen Wang,Lingling Song,Yu You,Ru Zhou,Junjun Zhang,Jun Xu
Despite the fulfilling progress in fabricating advanced nickel dichalcogenide catalysts towards an efficient oxygen evolution reaction (OER), previous efforts focused on the pyrite structure. In this work, combinational modulations of metallic NiSe2 nanodendrites by phase engineering and heteroatom doping are achieved to promote the OER. A series of marcasite NiSe2 (m-NiSe2) and Fe-doped marcasite NiSe2 (m-Ni1−xFexSe2) nanodendrites with various dopant contents have been controllably synthesized. On the one hand, phase engineering to synthesize m-NiSe2 nanodendrites offers a better intrinsic electronic conductivity than the pyrite phase. On the other hand, heteroatom Fe doping in m-NiSe2 nanodendrites further gains electronic benefits and simultaneously provides more electrochemical active sites owing to heteroatom displacement defects. Consequently, an optimized catalyst of m-Ni0.94Fe0.06Se2 nanodendrites with a moderate dopant content is developed, exhibiting significantly improved OER performance with a low overpotential of 279 mV at 10 mA cm−2, a small Tafel slope of 39 mV dec−1 and long operational stability for 35 h in 1.0 M KOH. In situ surface oxidation of the m-Ni0.94Fe0.06Se2 nanodendrites to form amorphous Fe-doped NiOOH/Ni(OH)2 shells during the OER process is demonstrated, which contributes to their superior activity and outstanding stability. This work provides valuable insights into the design of advanced OER electrocatalysts by means of combinational modulations of phase engineering and heteroatom incorporation.
研究领域:
材料科学
·
电化学
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Junyu Gao,Hongqin Ma,Xinyue Luo,Luqi Yu,Xingpeng Gu,Jiahao Liu
Rational design of low-cost and highly-efficient electrocatalysts is vital for water electrolysis. To date, many works have proved that the electrocatalytic hydrogen evolution reaction (HER) activity of the transition metal chalcogenides (TMCs) can be enhanced by anion or cation doping. However, the effect of anion-cation dual-doping on improving the HER activity of TMCs catalysts is still questionable. Herein, we designed and synthesized a porous (Mo, N)-NiSe 2 /Nickel foam (NF) nanosheets array by simultaneous doping Mo and N into pyrite-type NiSe 2 . For (Mo, N)-NiSe 2 /NF, the incorporation of Mo could significantly increase the specific surface area and active sites of NiSe 2 catalyst, whereas N doping was primarily responsible for accelerating the intrinsic reaction kinetics as well as introducing new reactive sites of catalyst. As a result, the porous (Mo, N)-NiSe 2 /NF nanosheets array exhibited a low overpotential of 82 mV at 10 mA.cm −2 , a small Tafel slope of 84.5 mV.dec −1 , and a high C dl of 90.5 mF.cm −2 for HER. Furthermore, the results of “post-HER” XRD , HR-TEM, SEM and XPS demonstrated that the structure, composition and morphology of (Mo, N)-NiSe 2 /NF remained unchanged after 35 h constant current test. This work highlighted the importance of anion-cation dual-doping in boosting electrocatalytic HER activity of TMCs catalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2018
·
IF 6.14
Yajie Guo,Dong Guo,Feng Ye,Ke Wang,Zhongqi Shi,Xianjue Chen,Chuan Zhao
NiSe2 nanowire (NW) arrays grown on flexible carbon fiber paper (CFP) were synthesized, for the first time, through a novel thermal selenization method in vacuum instead of flowing inert gas. The ultrathin NiSe2 NWs uniformly cover the CFP, contributing to the large surface area and fast charge transportation. Desirably, this binder-free and hierarchical electrode shows favorable activity for hydrogen evolution reaction (HER). It only requires an overpotential of 172 mV to afford the current density of 100 mA cm–2 in 0.5 M H2SO4, corresponding to a low Tafel slope of 32.44 mV dec–1. After 1000 continuous cycles, the HER activity of NiSe2 NWs is well-maintained. Moreover, the current density remains unchanged in prolonged electrolysis, indicating an excellent durability of NiSe2 NWs. The novel preparation method described in this study could inspire future work on the synthesis of transition-metal dichalcogenides with high purity and ultrasmall nanostructure toward improved electrocatalytic activity.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Shasha Wei,Yayun Zheng,Jianfeng Liu,Jitao Shang,Fei Lv,Tong Yang,Zhaofu Zhang,Yan Xiong,Qiu He,Yan Zhao
To address the severe challenges of sluggish reaction kinetics and shuttle effects in lithium-sulfur (Li–S) batteries, this study ingeniously employed an efficient microwave-assisted (MA) strategy to rapidly synthesize the MXene–NiSe 2 @C (denoted as MA MX–NiSe 2 @C) heterostructure, serving as a sulfur host material. This method offered key benefits such as rapid and uniform heating, along with high energy efficiency. Theoretical simulations validated that the MXene–NiSe 2 heterostructure interface promoted the electron transfer processes, enhanced polysulfides adsorption, catalyzed the multi-step reduction of sulfur, and significantly reduced the energy barrier for Li 2 S decomposition. Electrochemical experiments demonstrated that MA MX–NiSe 2 @C notably improved Li–ion diffusion kinetics, accelerated sulfur redox reactions, and effectively mitigated shuttle effects. As a result, Li–S batteries based on the MA MX–NiSe 2 @C cathode exhibited a high initial capacity of 1222 mA h·g −1 at 0.1C, enhanced rate performance of 619 mA h·g −1 at 2C, and remarkable cycling stability. Even after 1000 cycles at a high 2C rate, the average capacity decay rate per cycle remained at only 0.054 %. This efficient synthesis method for MXene–transition metal selenide electrocatalysts, coupled with a thorough investigation of their adsorption and catalytic mechanisms in the intricate multiphase electrochemical reactions of Li–S batteries, provides strong support for the ongoing advancement of Li–S battery technology.
研究领域:
材料科学
·
电化学
✓ 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）