RSC Advances
·
2015
·Vol. 5
·期 99
·81474-81481
·
IF 3.84
Chao Gong,Miaoliang Huang,Jinfang Zhang,Min Lai,Leqing Fan,Jianming Lin,Jihuai Wu
Ni0.85Se was in situ grown on Ni foam via a facile hydrothermal process as a high-performance electrode for supercapacitors. The as-obtained Ni0.85Se electrode exhibited excellent electrochemical properties with a higher specific capacitance of 1115 F g−1 (1.34 F cm−2) and remarkable cycling stability (91.7% of the initial capacitance value remained after 1000 cycles). An asymmetric supercapacitor was fabricated successfully based on Ni0.85Se (positive electrode) and activated carbon (negative electrode). The Ni0.85Se//AC ASC can expand the operating voltage as high as 1.6 V, which led to an ultrahigh energy density of 32.2 Wh kg−1 at a power density of 789.6 W kg−1. Further, the ASC had a highlight cycle performance (only 1.7% of CT loss after 2000 cycles), so it holds promise as a potential candidate for energy storage devices.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Shaowu Yuan,Yihui Wu,Le Huang,Zejie Zhang,Wenjing Chen,Yuxin Wang
Coupling the hydrogen evolution reaction (HER) with the urea oxidation reaction (UOR) represents a highly promising energy-saving strategy for hydrogen production. However, the development of cost-effective and high-performance bifunctional electrocatalysts remains a challenge. In this study, a Ni 0.85 Se/CoSe 2 heterojunction was constructed via electrodeposition, leveraging interfacial synergy to significantly enhance catalytic performance. Experimental results demonstrated that the heterojunction interface between N i0.85 Se and CoSe 2 greatly improved charge transfer efficiency, optimized the adsorption free energy of H* during HER, and accelerated water dissociation. In situ characterizations and theoretical calculations further revealed that the formation of CoSe 2 facilitated the reconstruction of Ni 0.85 Se, generating more active sites, lowering the kinetic barriers of UOR, and optimizing the adsorption of reaction intermediates on Ni sites. The Ni 0.85 Se/CoSe 2 catalyst exhibited HER and UOR overpotentials of 102 mV and 1.292 V at 10 mA·cm −2 , respectively, with a urea-assisted electrolytic hydrogen production voltage of only 1.348 V at 10 mA·cm −2 . This study provides an innovative strategy for designing high-efficiency bifunctional electrocatalysts.
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
Small
·
2023
·
IF 13.3
Yuxin Long,Qiang Li,Zidong Zhang,Qingxi Zeng,Dong Liu,Lanling Zhao,Yao Liu,Yebing Li,Yiming Zhang,Kunqian Ji,Zhaorui Zhou,Xue Han,Jun Wang
Li-O 2 batteries could deliver ultra-high theoretical energy density compared to current Li-ion batteries counterpart. The slow cathode reaction kinetics in Li-O 2 batteries, however, limits their electrocatalytic performance. To this end, MoSe 2 and Ni 0.85 Se nanoflakes were decorated in carbon hollow nanoflowers, which were served as the cathode catalysts for Li-O 2 batteries. The hexagonal Ni 0.85 Se and MoSe 2 show good structural compatibility with the same space group, resulting in a stable heterogeneous structure. The synergistic interaction of the unsaturated atoms and the built-in electric fields on the heterogeneous structure exposes abundant catalytically active sites, accelerating ion and charge transport and imparting superior electrochemical activity, including high specific capacities and stable cycling performance. More importantly, the lattice distances of the Ni 0.85 Se (101) plane and MoSe 2 (100) plane at the heterogeneous interfaces are highly matched to that of Li 2 O 2 (100) plane, facilitating epitaxial growth of Li 2 O 2 , as well as the formation and decomposition of discharge products during the cycles. This strategy of employing nonstoichiometric compounds to build heterojunctions and improve Li-O 2 battery performance is expected to be applied to other energy storage or conversion systems.
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
·
2021
·
IF 6.901
Guigui Liu,Chao Shuai,Zunli Mo,Ruibin Guo,Nijuan Liu,Qibing Dong,Jia Wang,Hebing Pei,Wentong Liu,Xudong Guo
Developing and preparation of stable and efficient non-noble metal electrocatalysts is vital for overall water splitting. Herein, a series of Fe-doped Ni 0.85 Se (Fe x Ni 0.85-x Se, x = 0.02, 0.04, 0.05, 0.06, 0.08, 0.1, 0.15, 0.2, 0.3 and 0.4) catalysts are synthesized successfully by one-step hydrothermal method and studied as high active bifunctional catalyst for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in electrolysis water splitting. The results indicates that a suitable doping can make different metal ions have a synergistic effect and improve catalytic performance. The optimal Fe 0.08 Ni 0.77 Se sample shows excellent OER and HER activities. Subsequently, the introduction of carbon nanotubes (CNTs) forming Fe 0.08 Ni 0.77 Se/CNT composite further enhances the electrocatalytic activity due to high electric conductivity of carbon nanotubes network. The resulted Fe 0.08 Ni 0.77 Se/CNT 3 composite exhibits smaller overpotential of 204 mV and 108 mV at a current density of 10 mA cm −2 and a low Tafel slope of 58 mV dec −1 and 59 mV dec −1 than that of other composites for OER and HER, respectively. The results demonstrate that Fe 0.08 Ni 0.77 Se/CNT 3 is an excellent bifunctional catalyst, providing a promising candidate for electrocatalytic water splitting .
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Xianwen Wang,Fei Li,Xu Yan,Yan Ma,Zhao-Hua Miao,Liang Dong,Huajian Chen,Yang Lu,Zhengbao Zha
Large-size-induced long-term retention in the body has hampered the translational applications of many reported nanomedicines. Herein, we reported a multifunctional theranostic agent composed of ultrasmall poly(acrylic acid)-functionalized Ni0.85Se nanoparticles (PAA–Ni0.85Se NPs), which were successfully obtained through a facile ambient aqueous precipitation strategy. Without exhibiting any noticeable toxicity, the as-prepared PAA–Ni0.85Se NPs (average diameter of 6.40 ± 1.89 nm) showed considerable absorption in near-infrared (NIR) region and high photothermal conversion efficiency of 54.06%, which could induce remarkable photoacoustic signals for tumor imaging and heat for localized ablation of cancerous cells upon exposure to NIR light. Notably, the ultrasmall PAA–Ni0.85Se NPs, unlike conventional nanomaterials with larger sizes, showed reasonable body clearance within 8 h after intravenous injection. Furthermore, ascribed to protonation process of amino groups in DOX molecules and carboxyl groups in PAA molecules in an acidic microenvironment, the drug-loaded (doxorubicin hydrochloride, DOX·HCl) PAA–Ni0.85Se NPs (PAA–Ni0.85Se–DOX NPs) revealed promoted drug release at acidic pH, which could be useful for acidic tumor microenvironment responsive drug delivery. Evident from the results of cell-killing assay in vitro and tumor treatment study in vivo, PAA–Ni0.85Se–DOX NPs exhibited evident synergistic effects on killing 4T1 breast cancer cells. Thus, this study presents a multifunctional theranostic agent composed of ultrasmall PAA–Ni0.85Se NPs for potential cancer treatment without long-term toxicity concerns.
研究领域:
生物医学工程
·
癌症治疗
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Shixiang Xue,Tong Zhou,Pan Wu,Liang Zhao,Yanli Nan,Mingtao Qiao,Wanying Lei
Exploring high-efficient, earth-abundant and stable electrocatalyst for oxygen evolution reaction (OER) is of vital importance for large-scale implementation of energy converting and storing. Thus, we fabricated a free-standing hierarchical heterostructure electrode of Ni 0.85 Se@CoFe LDH/NF via a rational combination of hydrothermal, selenization and electrodeposition process, among which the ultrathin CoFe LDH nanosheets intimately assembled onto the vertical aligned Ni 0.85 Se nanosheets supported on Ni foam. The constructed core-shell nanosheet arrays hold the plentiful hetero-interfaces and intimate interactions through metal-oxygen bonds between two individuals, which guarantee the fast OER kinetic processes. Additionally, CoFe LDH with crystalline/amorphous hybrid structure favors providing more reaction sites. Remarkably, the optimal Ni 0.85 Se@CoFe LDH/NF binary composites possess outstanding OER activity with a low overpotential of ∼223 and 280 mV at 10 mA cm −2 and 100 mA cm −2 in alkaline solution as well as good durability. This research offers an alternative approach for improving electrocatalytic water splitting through constructing 3D hierarchical heterostructures.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Shaojian Jiang,Lijun Zhang,Hongjie Yu,Kai Deng,Ziqiang Wang,You Xu,Hongjing Wang,Liang Wang
Two-electron oxygen reduction reaction (2e − ORR) for hydrogen peroxide (H 2 O 2 ) production in acidic solution is becoming a promising synthetic method due to its mild and green process. However, it is still hindered by sluggish kinetics and low selectivity. Given that heterostructure can enhance electron transfer and provide abundant active sites, interface modification can optimize O 2 adsorption configurations and the adsorption energy of the reaction intermediates to improve ORR activity and selectivity. Here, we coupled heterostructures of Ni 0.85 Se-MoSe 2 and polyethyleneimine (PEI) functionalization to enhance the activity and selectivity of the 2e − ORR for the efficient production of H 2 O 2 in acidic solutions. The as-fabricated Ni 0.85 Se-MoSe 2 @PEI performed 91.7 % selectivity of H 2 O 2 in the rotating ring-disk electrode test, while the H 2 O 2 yield rate was up to 3.57 mol g cat. −1 h −1 and the Faraday efficiency was 95.5 % in the H-type cell. In addition, Ni 0.85 Se-MoSe 2 @PEI maintains excellent stability in long-term operation, verifying the practicability of the catalyst. The combination of heterostructure and interface engineering provides research ideas for the electrochemical synthesis of H 2 O 2 .
研究领域:
材料科学
·
电化学
·
催化
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
X.U. Yang,Z.H.E.N.G. Leizhi,L.I.U. Chengbao,C.H.E.N. Feng,Q.I.A.N. Junchao,Q.I.U. Yongbin,M.E.N.G. Xianrong,C.H.E.N. Zhigang
Due to its special electron configuration, large number of electrochemical reactive sites, and a high theoretical specific capacitance, Ni 0.85 Se has great application potential for supercapacitor electrodes. However, the poor charge driving ability and easy aggregation of Ni 0.85 Se hinder the full utilization of its electrochemical reactive site, thus limit its practical application. Here, nano-rod-like highly crystalline graphitic carbon nitride (CCN) was synthesized via molten salt assisted method, and then CCN/Ni 0.85 Se composite nanomaterials were synthesized by hydrothermal induction. Through various characterization and electrochemical tests, nano-rod-like CCN not only improves the poor electrical conductivity and incomplete surface reactive site exposure of bulk g-C 3 N 4 prepared by traditional thermal polymerization, but also improves the charge dynamics and enrich the electrochemical active sites of sheets Ni 0.85 Se, and improves the electrochemical activity of the composite. On the base of results, CCN/Ni 0.85 Se-7 has the best specific capacitance of 1234 F g −1 at 1 A g −1 , which is significantly higher than that of pure phase Ni 0.85 Se (841.2 F g −1 ) and CCN (34.4 F g −1 ). The CCN/Ni 0.85 Se-7//AC two-electrode device exhibited a maximum energy density of 29.11 Wh kg −1 , a maximum power density of 8499.86 W kg −1 , and good capacitance retention ability of 81.46 % after 2000 cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
·
IF 13.3
Kaili Wu,Chaojie Lyu,Jiarun Cheng,Zhonglu Guo,Hongyu Li,Xixi Zhu,Woon-Ming Lau,Jinlong Zheng
Exploring and developing novel strategies for constructing heterostructure electrocatalysts is still challenging for water electrolysis. Herein, a creative etching treatment strategy is adopted to construct NiSe 2 /Ni 0.85 Se heterostructure. The rich heterointerfaces between NiSe 2 and Ni 0.85 Se emerge strong electronic interaction, which easily induces the electron transfer from NiSe 2 to Ni 0.85 Se, and tunes the charge-state of NiSe 2 and Ni 0.85 Se. In the NiSe 2 /Ni 0.85 Se heterojunction nanomaterial, the higher charge-state Ni 0.85 Se is capable of affording partial electrons to combine with hydrogen protons, inducing the rapid formation of H 2 molecule. Accordingly, the lower charge-state NiSe 2 in the NiSe 2 /Ni 0.85 Se heterojunction nanomaterial is more easily oxidized into high valence state Ni 3+ during the oxygen evolution reaction (OER) process, which is beneficial to accelerate the mass/charge transfer and enhance the electrocatalytic activities towards OER. Theoretical calculations indicate that the heterointerfaces are conducive to modulating the electronic structure and optimizing the adsorption energy toward intermediate H * during the hydrogen evolution reaction (HER) process, leading to superior electrocatalytic activities. To expand the application of the NiSe 2 /Ni 0.85 Se-2h electrocatalyst, urea is served as the adjuvant to proceed with the energy-saving hydrogen production and pollutant degradation, and it is proven to be a brilliant strategy.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Shenghua Hou,Fei Xie,Xuejie Wang,Liuyang Zhang,Xinming Nie,Jiaguo Yu,Tao Liu
Graphene-based metal selenides, are increasingly recognized for their potential in sodium-ion battery applications due to their superior electrochemical properties. The unique structure of graphene facilitates rapid in-plane transport of sodium ions, but the interlayer diffusion remains a significant challenge. The Ni 0.85 Se@CoSe heterojunctions, strategically grown adjacent to the graphene pores, offer a novel solution by creating in-plane holes that serve as direct channels for vertical ion transport, thereby enhancing cross-layer sodium ion permeation. The incorporation of Ni 0.85 Se@CoSe heterojunctions with holey graphene (NCS/HG) significantly enhances the reaction dynamics between sodium ions and anode material. These heterojunctions not only promote easier sodium ion insertion/extraction process by reducing the Na + adsorption energy, but also improve the electrical conductivity by adjusting the band gap. The configuration supports high current density applications (573.5 mAh/g at 5.0 A/g), and ensures robust cycle stability with a capacity retention rate of 97 % after 1000 cycles at 2.0 A/g. Therefore, the development and etching techniques employed in engineering the Ni 0.85 Se@CoSe/HG graphene-based anodes exemplify a significant advancement in anode material design, highlighting the importance of material architecture in the development of high-performance energy storage devices.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
J.C. Xi,Y.F. Yuan,G.C. Cai,B.X. Wang,Y.Z. Huang,S.Y. Guo,P.F. Du
As a novel anode material for sodium-ion batteries, ultrafine Ni 0.85 Se nanoparticles encapsulated inside hollow porous carbon spheres (HPCS@Ni 0.85 Se) are prepared by impregnating Ni(NO 3 ) 2 into HPCSs, calcination and selenization, which is based on the strong capillary effect of HPCSs. Material characterization reveals that Ni 0.85 Se nanoparticles with a diameter of 5–15 nm are evenly dispersed and intimately coupled to the internal wall of HPCSs, and the content of Ni 0.85 Se reaches 52.81%. HPCSs as unique reactors and Ni 0.85 Se carriers improve electronic conductivity of Ni 0.85 Se, facilitate electrolyte penetration and storage, buffer volume variation of Ni 0.85 Se, effectively confine Ni 0.85 Se during long-term cycles. Consequently, HPCS@Ni 0.85 Se exhibits excellent cycling durability and extraordinary rate capability. High reversible capacities of 341 mA h g −1 at 1 A g −1 after 1000 cycles, 280 mA h g −1 at 5 A g −1 after 2000 cycles and 305 mA h g −1 at 10 A g −1 after 540 cycles are achieved. The reaction kinetics and Na + storage mechanism are further analyzed by galvanostatic intermittent titration technique, cyclic voltammetry and electrochemical impedance spectra measurements. Ex-situ characterizations confirm outstanding structural stability of HPCS@Ni 0.85 Se. It is demonstrated that HPCS@Ni 0.85 Se is an excellent anode material, and this unique HPCS-based nanoencapsulation structure is an effective composite strategy for transition metal selenides .
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
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 40
·17313-17322
·
IF 3.288
Guigui Liu,Chao Shuai,Zunli Mo,Ruibin Guo,Nijuan Liu,Xiaohui Niu,Qibing Dong,Jia Wang,Qinqin Gao,Ying Chen,Wentong Liu
The design and preparation of highly efficient and durable non-noble metal electrocatalysts for overall water splitting is pivotal for actualizing large-scale water splitting via electrolysis. Herein, porous Ni0.85Se nanospheres anchored on reduced graphene oxide (RGO) (Ni0.85Se/RGO) were synthesized via a one-step hydrothermal method. Following explorations of the hydrothermal temperature and reaction time, the optimized Ni0.85Se/RGO exhibited extraordinary oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) performance in 1.0 M KOH solution, providing an overpotential as small as 320 mV at a current density of 30 mA cm−2 and a low Tafel slope of 91 mV dec−1 for the OER, and an overpotential of 169 mV at a current density of 10 mA cm−2 and a low Tafel slope of 65 mV dec−1 for the HER. A current density of 10 mA cm−2 at 1.64 V and high stability can be obtained upon using Ni0.85Se/RGO as both the cathode and anode for overall water splitting under alkaline conditions; this was attributed to the merits of both the porous structure of Ni0.85Se and the high conductivity of RGO. This work provides a meaningful exploration of the synthesis of 3d-transition-metal-chalcogenide- and carbon-based composite electrocatalysts via a hydrothermal reaction for water splitting, and provides a general method.
研究领域:
材料科学
·
电化学
·
纳米技术
·
催化
✓ 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）