Nanoscale
·
2024
·Vol. 16
·期 47
·21947-21959
·
IF 5.8
Feng Jiao,Jun Tang,Jinzhao Huang,Zehui Liu,Jing Xiao
Molybdenum sulfide (MoS2) has attracted much attention as a potential catalyst for the oxygen evolution reaction (OER), but its unique low activity and low edge active centers limit its electrocatalytic activity. In this study, catalysts were prepared by growing NiSe nanoclusters in situ onto MoS2 substrates via electrodeposition; ultrathin MoS2 nanosheets and NiSe nanoclusters were cross-linked with each other to form a unique three-dimensional rosette structure; and MoS2@NiSe catalysts were successfully synthesised, which significantly improved bifunctional catalytic performance. The synthesised MoS2@NiSe catalysts exhibited good electrochemical performance: overpotentials required to satisfy the HER and OER processes at a current density of 10 mA cm−2 in 1 M KOH were 80 mV and 254 mV, respectively. When applied as a cathode and anode to assemble a bifunctional electrode system, the MoS2@NiSe||MoS2@NiSe electrolytic cell system required only 1.54 V to achieve 10 mA cm−2 in an alkaline electrolyte, which exceeded the value of most of the bifunctional catalysts reported in the literature to date. In addition, the catalyst maintained good surface structure and catalytic performance after a 24 h stability test. This study provides a new idea for the improvement and design of MoS2-based bifunctional catalysts and provides an important reference for research in the field of clean energy.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2021
·Vol. 32
·期 34
·345706
·
IF 3.874
Leqiu He,Yan Wang,Yajie Guo,Guobing Li,Xubin Zhang,Wangfeng Cai
Novel core−shell nanostructure electrodes benefit from the excellent properties of their constituent materials, as well as the synergy between them. However, it is challenging to fabricate such structures efficiently. In this study, NiSe nanorods were fabricated using Ni foam as the conductive substrate and reactant via a one-step hydrothermal process, and Ni(OH)2 nanosheets were coated on the surface of the nanorods via one-step electrodeposition. The effect of the structure and morphology on the properties of the material was explored using scanning electron microscopy, x-ray diffraction, and electrochemical technology. The obtained core−shell NiSe/Ni(OH)2 exhibited an areal capacity of 1.89 mAh cm−2 at a current density of 5 mA cm−2. The assembled NiSe/Ni(OH)2//AC hybrid supercapacitor exhibited excellent energy and power densities, indicating that NiSe/Ni(OH)2 has great potential for use as a battery-type electrode in energy storage systems.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xiaotian Xie,Yi Xu,Jie Liu,Dongtian Wang,Tingting Lv,Fanshu Yuan,Qianli Zhang
Structural regulation is an effective strategy for enhancing an electrode's energy storage performance. Herein, lignin-derived carbon dots (LCDs) are explored for the structural tailoring of NiSe/MnO2 to improve the electrochemical performance in supercapacitors. After the dendritic NiSe microcrystals are synthesized via a microwave method, NF/NiSe/MnO2-LCDs are prepared by another microwave process to form a composite mixture of LCDs, MnO2, and NF/NiSe. At 1 A g–1, NF/NiSe/MnO2-LCDs possess a specific capacitance of 2268 F g–1 and superb lifespans (84.43%, 3000 cycles) for their enhanced ion transport and rapid electron transfer. In addition, the NF/NiSe/MnO2-LCDs//AC ASC showed an energy density of 51.62 Wh kg–1 at 800 W kg–1 and extraordinary endurance with 88.46% retention (7000 loops). The NF/NiSe/MnO2-LCDs offer ideas to improve the capacity retention and storage capacity of electrodes for supercapacitors.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yan An,Xiaoping Hu,Xinyu Wang,Jian Tian
Solar energy conversion into hydrogen (H 2 ) energy has attracted much attention. However, the low light utilization rate and fast carrier recombination of photocatalysts extremely limit the practical application of photocatalytic H 2 production. In this paper, MoSe 2 -NiSe with abundant active sites and interfacial electronic structures as dual co-catalysts were assembled on g-C 3 N 4 nanosheets (NSs) vis a solvothermal reaction process. MoSe 2 -NiSe/g-C 3 N 4 NSs composite exhibited improved light absorption and photoelectrochemical properties. The photocatalytic H 2 production rate of MoSe 2 -NiSe/g-C 3 N 4 composite achieved 2379.04 μmol·h −1 ·g −1 , which is 99.25, 1.44, and 3.67 times those of pure g-C 3 N 4 nanosheets (23.97 μmol·h −1 ·g −1 ), MoSe 2 /C 3 N 4 (1654.57 μmol·h −1 ·g −1 ), and NiSe/C 3 N 4 (649.08 μmol·h −1 ·g −1 ), respectively. The apparent quantum efficiency (AQE) value of MoSe 2 -NiSe/g-C 3 N 4 achieved 4.07 % under light at λ = 370 nm. The corresponding characterization and experiments proved that 2D ultrathin g-C 3 N 4 NSs with a large surface area and short charge-transfer distance could facilitate light scattering and the transport of photoexcited electrons. MoSe 2 -NiSe, as a dual co-catalyst, showed strong electronic synergistic interaction between the interfaces, thus improving the conductivity and promoting the electron transfer process.
研究领域:
材料科学
·
能源化学
·
光催化技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Xinwei Jiang,Haisheng Gong,Qiuwen Liu,Mingxia Song,Caijin Huang
Mn x Cd 1-x S solid solution is an emerging semiconductor for photocatalytic water splitting with a tunable bandgap. However, it still leaves much room to improve the photocatalytic activity. Herein, we modified Mn 0.5 Cd 0.5 S with noble metal-free NiSe by an in-situ hydrothermal synthesis. The as-obtained NiSe/Mn 0.5 Cd 0.5 S nanocomposites exhibited highly efficient photocatalytic H 2 production under visible light and the highest hydrogen generation rate reaches 28.08 mmol/h/g, which is higher than that of Mn 0.5 Cd 0.5 S (13.71 mmol/h/g) and 1 wt% Pt/Mn 0.5 Cd 0.5 S (24.22 mmol/h/g). Through the detailed analyses of UV–vis DRS, photoluminescence (PL) spectra, time-resolved photoluminescence (TRPL) and photoelectrochemical tests, we found the well-matched structure between NiSe and Mn 0.5 Cd 0.5 S, which facilitates the charge transfer and prolongs the lifetime of photo-induced electrons, and thus improves photocatalytic activity.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 43
·期 5
·2389-2399
·
IF 3.201
Beirong Ye,Chao Gong,Miaoliang Huang,Jinhua Ge,Leqing Fan,Jianming Lin,Jihuai Wu
NiSe rods coated with cotton-like Ni3S2 were directly grown on nickel foam through a two-step process, comprising selenization and electrodeposition. The as-obtained NiSe/Ni3S2 composite electrode exhibited excellent electrochemical properties, with a high specific capacitance of 8.81 F cm−2 (1259.3 F g−1) at a current density of 4 mA cm−2, which was better than the value of pure NiSe electrode (5.17 F cm−2; 861.8 F g−1) at the same current density. Moreover, an asymmetric supercapacitor (ASC) was fabricated using NiSe/Ni3S2 electrode and AC electrode as positive electrode and negative electrode, respectively. This ASC extended the potential window to 1.6 V and was possessed of a superior energy density of 38.7 W h kg−1 at a power density of 192 W kg−1, with outstanding cycling stability (85.9% retention after 10 000 cycles).
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Xiaohui Lu,Xiandong Zhao,Congcong Wu,Shiming Wang,Yanyan Li,Xiaojie Yang,Yang Li,Li Zhao
Interfacial defects between the perovskite layer and the adjacent charge transport layer play a crucial role in enhancing the power conversion efficiency (PCE) and stability of organic–inorganic halide perovskite solar cells. In this study, we employed a transition metal-containing selenide (NiSe) to modify the interface between the electron transport layer and the perovskite layer. Ni2+ as a transition metal exhibits a strong propensity for forming octahedral complexes with halide ions, thereby providing a favorable substrate for perovskite crystallization. This significantly contributes to the reduction of defect densities and the fabrication of high-quality perovskite thin films. Our findings indicate that the grain size of the perovskite films markedly increased upon modification with 0.4 mg mL−1 NiSe, resulting in a reduction of defect density from 2.175 × 1016 cm−3 to 1.485 × 1016 cm−3. Furthermore, the PCE of the NiSe-modified device, at a concentration of 0.4 mg mL−1, reached 14.85%, a significant improvement compared to that of the unmodified device (12.14%). These results offer a novel approach to fabricate perovskite films with enhanced crystallinity and reduced trap density.
研究领域:
材料科学
·
太阳能电池技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2018
·
IF 6.759
Wenlong Zhen,Xiaofeng Ning,Meng Wang,Yuqi Wu,Gongxuan Lu
CdS is a promising visible-light responsive photocatalyst. However, the serious photocorrosion limits its application in photocatalysis. Here we report a novel strategy to overcome the disadvantage of CdS photocorrosion by fabricating peroxide decomposing active MnO 2 thin-layer over CdS nanowires (NWs) and assembling oxygen separation artificial gill to remove nascent formed oxygen in the dispersion. In the meantime, the using non-noble metal NiSe quantum dots (QDs) co-catalyst, NiSe/MnO 2 -CdS photocatalysts shows excellent photocatalytic over-all water splitting activity and remarkable stability under visible light irradiation without addition of any sacrifice reagent, 455.0 µmol h −1 g −1 of hydrogen evolution reaction (HER) rate and 5.20% of apparent quantum efficiency (AQEs) at 430 nm. Removing nascent formed O 2 from water by artificial gill can prevent the oxygen leading CdS photocorrosion. Photoluminescence spectra and photoelectrochemical measurements indicate that loading NiSe QDs and coating MnO 2 thin-layer can also improve transfer of the photogenerated charges in CdS. MnO 2 thin-layer can decompose formed hydrogen peroxide and enhance water splitting. Our results could potentially provide a new method for designing and fabricating more stable and efficient CdS-based nanocomposite photocatalysts toward versatile solar energy conversion.
研究领域:
材料科学
·
光催化
·
能源转换
✓ 已验证
DOI
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 10
·2168
·
IF 4.6
Qianwen Duan,Hongjie Kang,Cuiling Guan,Xueming Zhao,Haidong Zhao,Buqin Jing,Zhen Lu,Feng Feng
This paper investigated the preparation of NiSb/NiSe nanomaterials using a microwave method and explored their electrochemical properties and potential applications in supercapacitors. The NiSb/NiSe nanomaterials were synthesized on nickel foam using microwave radiation, resulting in uniformly distributed flower-like nanostructures. This structure not only provided abundant electrochemical reaction sites, but also improved the electrical conductivity and ion diffusion, contributing to the overall performance of supercapacitors. Electrochemical tests showed that the NiSb/NiSe material exhibited a high specific capacity of 525 mAh g−1at 1 A g⁻1and maintained 65% capacity after 8000 cycles, demonstrating excellent cycling stability and battery-type charge storage capability. In addition, a hybrid supercapacitor assembled using NiSb/NiSe as the anode material and activated carbon (AC) as the cathode material achieved an energy density of 100.34 Wh kg−1at a power density of 774.9 W kg−1, significantly enhancing energy storage efficiency. The effect of different microwave powers and reaction times on the morphology and electrochemical properties of the materials were further investigated, with the optimal preparation conditions found to be 800 W and 150 s. The NiSb/NiSe materials synthesized under this condition not only have the best electrochemical properties, but also exhibit low charge transfer impedance and excellent electrical conductivity. In summary, NiSb/NiSe flower-like nanomaterials as supercapacitor electrode materials demonstrate great potential for energy storage applications due to their high specific capacity, good cycling stability and high energy density.
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
Catalysts
·
2022
·Vol. 12
·期 12
·1525
·
IF 4.501
Sai Che,Na Ta,Fan Yang,Yulong Yang,Yongfeng Li
Rational design and construction of cost–effective electrocatalysts for efficient hydrogen production has attracted extensive research attention worldwide. Herein, we report the construction of a transition metal selenide/carbon composite catalyst featuring uniform NiSe nanoparticles anchored to single Ni atom doped porous carbon structure (NiSe/Ni–N–C) via a facile one–pot pyrolysis of low–cost solid mixtures. NiSe/Ni–N–C exhibits remarkable catalytic performance towards hydrogen evolution reaction (HER) in 1.0 M KOH, requiring a low overpotential of 146 mV to reach a current density of 10 mA cm−2. The unique carbon layer encapsulation derived from the enwrapping of fluid catalytic cracking slurry further renders NiSe/Ni–N–C excellent for long–term durability in electrolyte corrosion and nanostructure aggregation. This work paves the way for the design and synthesis of highly efficient composite HER electrocatalysts.Keywords:NiSe nanoparticle;single atom catalyst;interfacial electronic engineering;hydrogen evolution reaction
研究领域:
电化学
·
材料科学
·
催化
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 21
·5507-5516
·
IF 7.779
Xiaocheng Xu,Rui Wang,Sijie Chen,Alex Trukhanov,Yanxue Wu,Lianyi Shao,Le Huang,Zhipeng Sun
Developing non-noble metal-based electrocatalysts with excellent activity and stability for the hydrogen evolution reaction (HER) is crucial for the efficient electrolysis of water. Herein, self-supported three-dimensional (3D) P-doped NiSe/2H-MoSe2 nanorod arrays (denoted as P-NiSe/MoSe2) were fabricated by a hydrothermal reaction and subsequent selenization and phosphorization processes. Benefiting from P doping, the synergistic effect of the heterostructures, and abundant active sites, the P-NiSe/MoSe2 electrocatalyst exhibits excellent alkaline HER performance, with only 43 mV required to achieve 10 mA cm−2 with a Tafel slope of 93.1 mV dec−1, even remaining stable at 10 mA cm−2 for 30 hours. In addition, theoretical calculations show that the formation of the heterostructure and P doping optimize the H atom adsorption energies and accelerate electron transport, thus improving its performance in the HER. This work offers a hopeful route for the development of low-cost and efficient electrocatalysts through the simultaneous application of heterostructure engineering and heteroatom doping as well as a 3D structure.
研究领域:
材料科学
·
电催化
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Min Li,Junli Wang,Jiang Liao,Li Wang,Yan Ju,Xuanbing Wang,Jinlong Wei,Nianxiang Hu,Ruidong Xu,Linjing Yang
Electrocatalytic urea oxidation reaction (UOR) is one of the most promising energy-saving alternatives to anodic oxygen evolution reaction (OER), and the development of efficient and stable catalysts for UOR is crucial. Therefore, in this paper, hierarchical structure NiSe@Ni 12 P 5 /NCF with Ni 12 P 5 nanorod arrays coupled with NiSe nanospheres are synthesized on bare nickel-copper foam (NCF) by exogenous phosphorylation and subsequent electrodeposition methods. The catalytic performance of hierarchical structure NiSe@Ni 12 P 5 /NCF in urea-assisted electrolytic water reaction is studied in focus. The results show that the potential of NiSe@Ni 12 P 5 /NCF was only 1.267 V and 1.412 V vs RHE at current densities of 10 mA cm −2 and 100 mA cm −2 , respectively, in addition to no significant activity decay after 140 h stability test. This is attributed to the fact that the introduction of NiSe regulated the interfacial charge distribution, creating an interfacial coupling effect that can greatly increase the original catalytic species, as well as the NiOOH species generated during the UOR process as true active sites, which ultimately improving the electrocatalytic UOR performance of NiSe@Ni 12 P 5 /NCF. This study provides a new idea for the preparation of hierarchical selenide - phosphides for electrochemical applications.
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）