Nanoscale
·
2021
·Vol. 13
·期 42
·17846-17853
·
IF 7.79
Ting Li,Qing Zhang,Xiao Hu Wang,Juan Luo,Li Shen,Hong Chuan Fu,Fei Gu,Nian Bing Li,Hong Qun Luo
Electrochemical water splitting is widely studied in the hope of solving environmental deterioration and energy shortage. The design of inexpensive metal catalysts exhibiting desired catalytic performance and durable stability for efficient oxygen evolution is the pursuit of sustainable and clean energy fields. Herein, a three-dimensional (3D) flower-like NiSe2 primary structure, modified with highly dispersed CuSe2 nanoclusters as the secondary structure, is obtained by regulating the growth trend of the nanosheets. Benefiting from the metallicity of selenides and the formation of a heterogeneous interface, NiSe2@CuSe2/NF shows comparable performance toward the oxygen evolution reaction (OER) in an alkaline environment. Upon regulating the synthesis conditions, the catalyst exhibits its optimal performance with ultralow overpotential for the OER when the Ni/Cu molar ratio is 1 : 0.2 and the hydrothermal temperature and hydrothermal time are 200 °C and 6 h, respectively. It provides a current density of 10 mA cm−2 when a potential of 201 mV is applied without iR compensation. In this work, the hierarchical heterostructures of NiSe2 and CuSe2 are synthesized, which exhibit high electrocatalytic activity towards the oxygen evolution reaction and provides a new possibility for the extensive application of copper-based compounds in advanced energy fields.
研究领域:
材料科学
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能源化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
He Zhou,Jingrui Hou,Limin Zhang,Dezhi Kong,Hui Wang,Longhui Zeng,Zhiwei Ren,Tingting Xu,Ye Wang
Despite the rapid advances in electrocatalysts based on two-dimensional (2D) transition metal dichalcogenides (TMDs) materials, they are subject to serious aggregation, poor conductivity and the presence of inactive basal planes. Herein, we have successfully demonstrated the in-situ construction of NiSe 2 –MoSe 2 heterostructure arrays on carbon cloth (NiSe 2 –MoSe 2 /CC) by a facile two-step hydrothermal process. The presence of the synergistic effect in the heterostructures effectively optimizes the poor conductivity and hydrophilicity, and thus enables fast electron transfer, leading to enhanced electrochemical reaction. Furthermore, density functional theory calculations reveal that the electrons redistribution at the heterojunction interface and the reduced Gibbs free energy of hydrogen adsorption for hydrogen evolution reaction (HER)/the Gibbs free energy change value of rate-determining step for oxygen evolution reaction (OER), thus enhancing the HER/OER catalytic activity. Importantly, the device displays a good performance with a low overpotential of 98 and 310 mV for HER and OER, respectively, and a low cell voltage of 1.59 V for its corresponding electrolyzer (10 mA cm −2 ). This work presents the high-performance water splitting of bifunctional electrocatalysts based on 2D TMDs materials and offers a novel design concept of interface engineering.
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 Applied Materials & Interfaces
·
2025
·
IF 8.2
Wei Zheng,Minyu Li,Hongmei Chen,Fuyin Xie,Zequn Yang,Lijian Leng,Jianping Yang,Wenqi Qu,Hailong Li
The synthesis of structured metal organic framework (MOF)-derived selenide composites is a vibrantly emerging research area serving clean energy purposes. However, there is no way to convert MOFs into structured selenide composites under ambient conditions for unknown reasons. This work gave mechanistic insights into how the redox properties and release rate of selenium precursors influenced the structural inheritance behavior of MOFs during the selenization process, explaining why maintaining the morphology of MOFs during a room-temperature aqueous selenization process is a tricky task. A novel method of selenizing structured ZIF-67 into CoSex hollow cages with its cubic morphology maintained was developed. The target combination between Co and Se was the primary mechanism accounting for ZIF-67 selenization and its morphology inheritance. The selenized ZIF-67 was used in two typical clean energy areas, i.e., coal combustion detoxification and renewable energy storage. The performances of selenized ZIF-67 surpassed those of unstructured cobalt selenides and other benchmark materials used in these two areas. Following the mechanistic insights into the selenization process of ZIF-67, further work may develop more efficient methods to synthesize MOF-derived metal selenide composites under mild conditions, which is critical to extend the variety of MOF-derived materials and serve their cost-effective uses under practical scenarios.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 7
·3317-3326
·
IF 10.733
Menglei Yuan,Sobia Dipazir,Meng Wang,Yu Sun,Denglei Gao,Yiling Bai,Min Zhang,Peilong Lu,Hongyan He,Xiangyang Zhu,Shuwei Li,Zhanjun Liu,Zhaopeng Luo,Guangjin Zhang
The oxygen evolution reaction (OER) is a half reaction of electrochemical water splitting that suffers from a kinetically sluggish four-electron process, and it is regarded as the efficiency-limiting step in water splitting. Herein, heterostructures of CoSe (cobalt selenide) nanoparticles and MoSe2 (molybdenum selenide) nanosheets (CoSe/MoSe2 hybrids) were fabricated through a non-metal-induced growth method. Due to the increase in the effective specific area and the electron transfer ability caused by the formation of the heterogeneous interface, the obtained CoSe/MoSe2 hybrids show superior OER performance (η = 262 mV at 10 mA cm−2) and long-term stability (20 h for continuous testing) as compared to pure CoSe, MoSe2 and physically mixed CoSe and MoSe2. Schematic energy band diagrams derived from ultraviolet photoelectron spectroscopy results further confirmed the electronic modulation between CoSe and MoSe2 and revealed that the d-band center of CoSe/MoSe2 hybrids moved closer to the Fermi level, giving rise to high charge carrier density and low intermediate adsorption energy as compared to CoSe and MoSe2. This work provides some insight into the design and synthesis of heterostructured nanomaterials from the MOF precursors.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2018
·
IF 7.082
Changhai Liu,Ke Wang,Xuerui Zheng,Xiaocun Liu,Qian Liang,Zhidong Chen
The development of hydrogen evolution catalysts from earth-abundant elements with highly active and stable activity are crucial for the promotion of more energy and cost-efficient hydrogen production . Herein, a facile one-step hydrothermal approach is proposed to fabricate 3D hierarchical microcages composed of MoSe 2 -NiSe@carbon nanosheets for the efficient electro-catalytic hydrogen evolution reaction (HER) by water hydrolysis. The heterostrucutres were characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy , scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques. The nanohybrids of MoSe 2 -NiSe are constructed by in situ combination of hexagonal NiSe and MoSe 2 , where the high quality vertical heterostructure can benefit the electrons transfer from metallic NiSe to the MoSe 2 matrix, accomplishing the electronic modulation of MoSe 2 -NiSe@carbon catalysts for robust electrocatalytic performance. The optimal MoSe 2 -NiSe@carbon exhibits excellent HER catalytic performance and superior durability in both acidic and alkaline medium .
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
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jian Feng,Shao-hua Luo,Peng-wei Li,Yi-cheng Lin,Lin Zhang,Qing Wang,Ya-hui Zhang
Hybrid hierarchical nanostructures have a significant impact on engineering novel anode materials for boosting the performance of sodium-ion batteries (SIBs). Here, a hierarchical porous structure constituted by CoSe nanocrystals embedded in nitrogen-doped carbon polyhedron with the embellishment of 2H-MoSe 2 nanosheets (CoSe@NC/MoSe 2 ) is fabricated by a metal-organic frameworks (MOFs)-engaged strategy and subsequent selenization reaction. The presence of N-doped carbon matrix and bimetallic selenides significantly enhance electronic and ionic diffusion kinetics. In addition, the porous structure provides short Na + diffusion distance and guarantees outstanding structural stability upon cycling. Due to these distinctive features, the CoSe@NC/MoSe 2 composite displays superior cyclability of 305.9 mAh g −1 up to 1500 loops at 5.0 A g −1 and exceptional rate property of 286.1 mAh g −1 at 10.0 A g −1 for sodium storage. When matched with Na 3 V 2 (PO 4 ) 3 @C cathode, a SIB full cell can maintain a high invertible capacity of 78.9 mAh g −1 total over 100 loops at 0.5 A g −1 . Moreover, the multistep conversion reactions mechanism is further identified by kinetics analysis, and ex situ and in situ characterization.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Yun Xing,Shan Zhao,Jiaying Wu,Xin Tang,Yu Zhang,Zhirong Zou,Ke Huang,Xiaoli Xiong
Designing non-noble metal oxygen evolution catalysts with outstanding catalytic activity is crucial for realizing cost-effective water splitting. In this paper, nitrogen-doped carbon-encapsulated polyhedral yolk-shell nanostructure bimetallic selenide (ZnSe@CoSe 2 /N-C) electrocatalyst was successfully prepared by high-temperature selenization strategy using ZIF-8 @ZIF-67 as the framework. The specially designed nitrogen-doped core-shell structure has the advantages of high specific surface area and rough porous surface, which can expose more active sites and facilitate the transfer of electrons and ions on the electrode surface. The high conductivity of ZnSe, CoSe 2 nanoparticles and the synergistic effect of bimetal increase the electrochemical activity and electron mobility of the composite. ZnSe@CoSe 2 /N-C catalyst exhibits outstanding oxygen evolution reaction performance at 1.0 M KOH, which the overpotential is down to 170 mV at 10 mA cm −2 . Furthermore, ZnSe@CoSe 2 /N-C also shows well durability and long-term stability (>113 h). This experiment might open a new path for fabrication of low-cost non-noble metal selenide electrocatalysts for oxygen evolution.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Batteries-Basel
·
2023
·Vol. 9
·期 6
·307
·
IF 4
Deng Li,Huinan Pan,Zhonghai Lin,Xiulian Qiu,Xinyu Zhao,Wei Yang,Wenzhi Zheng,Fengming Ren
Compared with monometallic selenides, heterogeneous bimetallic selenides have rich phase boundaries and superior electrical conductivity. ZnSe/CoSe2composites were prepared by introducing Zn metal and using ZIF-8/67 as the precursor through the synergistic effect between Zn and Co after selenification. The electrocatalytic conversion of polysulfide is accelerated by ZnSe through chemical adsorption and the catalytic effect. The conductive CoSe2surface provides a rapid diffusion path for lithium ions, accelerating the conversion of the polysulfide. On the basis of their individual strengths, ZnSe and CoSe2can jointly promote the smooth adsorptive–diffuse–catalytic conversion process of polysulfide and induce the growth of lithium sulfide around its heterogeneous interface, thus enhancing the electrochemical performance of the lithium–sulfur battery cathode materials. The ZnSe/CoSe2–S electrode, at the optimal Zn-to-Co ratio of 1:1, has a 790.06 mAh g−1initial specific capacity at 0.2 C and excellent cycling stability at 1 C. After 300 cycles, the final capacity is 300.85 mAh g−1, and the capacity retention rate reaches 82.71%.
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
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Yalan Chen,Jingtong Zhang,Peng Guo,Haijun Liu,Zhaojie Wang,Ming Liu,Tian Zhang,Shutao Wang,Yan Zhou,Xiaoqing Lu,Jun Zhang
Hydrogen evolution reaction (HER) driven by high-performance and low-cost electrocatalysts has been well-identified as one of the most promising technologies to explore sustainable power sources. In this work, the authors demonstrated a series of Fe–Mo selenide composite nanomaterials with adjustable HER catalytic activities by a simple one-step hydrothermal reaction. The heterostructured catalyst exhibited significant enhancement in HER activity compared to the pristine MoSe2 and FeSe2 catalysts. It is found that the optimized Mo–Fe selenide can drive the HER at a current density of 10 mA cm–2 by an overpotential of 86.9 mV in acidic solution. Also, it possesses outstanding kinetics (Tafel slope of 57.7 mV dec–1) of the electrochemical reaction. Besides the synergistic effect of different chemicals, the coupled Mo–Fe selenide achieved the electronic modulation of the heterointerface, where electrons were accelerated to transfer from dispersed FeSe2 to the active edges on 1T-MoSe2 and further activated the electrochemical performance.
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
Nanoscale
·
2021
·Vol. 13
·期 12
·6241-6247
·
IF 7.79
Huan Wang,Zhonghua Sun,Xiaoran Zou,Jianhai Ren,Chun-yang Zhang
The rational construction of heterointerfaces in hollow nanohybrids is considered as a promising and challenging approach for enhancing their electrocatalytic performance. Herein, we demonstrate the synthesis of CoFe2Se4/NiCo2Se4 hybrid nanotubes (CFSe/NCSe HNTs) with open ends and abundant heterointerfaces. The CFSe/NCSe HNT hybrid nanotubes are obtained by using NiCo2-aspartic acid nanofibres (NiCo-Asp NFs) as the templates which can be converted to the CFSe/NCSe HNTs via proton etching, three metal coprecipitation, Kirkendall effect and anion-exchange reaction. The CFSe/NCSe HNTs may function as the oxygen evolution reaction (OER) electrocatalysts, and they exhibit a low overpotential of 224 mV at a current density of 10 mA cm−2 and outstanding stability with only 1.4% current density change even after 15 h, superior to those of the reported single-component counterparts. The obtained density of states and differential charge density confirm the existence of a heterointerface which can induce the accumulation of electrons at the interface of CFSe–NCSe and consequently increase the carrier density and electrical conductivity of the CFSe/NCSe HNTs. This research provides a new avenue for the fabrication of hollow nanohybrids with heterointerfaces.
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
IONICS
·
2021
·Vol. 27
·期 8
·3327-3337
·
IF 2.817
Xiao Dejun,Liu Suqin,Zhao Kuangmin,Ye Guanying,Su Yuke,Zhu Weiwei,He Zhen
Ultrasmall nitrogen-doped carbon-coated CoSe 2 /ZnSe nanospheres (CoSe 2 /ZnSe@C nanospheres) are fabricated by direct selenization of a delicately designed Co 1.6 Zn 0.4 -(benzimidazole) 4 metal–organic framework (MOF) nanosheet precursor and used as the anode materials in sodium-ion batteries (SIBs). The fabricated CoSe 2 /ZnSe@C nanospheres deliver a remarkable rate performance (395 mAh g −1 at 0.1 A g −1 and 341 mAh g −1 at 5.0 A g −1 ) and excellent long-term durability (346 mAh g −1 after 2500 cycle at 2.0 A g −1 ). The superior Na storage performance of the fabricated CoSe 2 /ZnSe@C nanospheres could be mainly attributed to their ultrasmall particle sizes and the phase boundaries between CoSe 2 and ZnSe, which improve the kinetics of the electrode, relieve the volume change during the charge/discharge process, and provide extra Na + storage sites. This work opens up possibilities to fabricate metal selenide–based hybrid materials with desired nanostructures and compositions from rationally designed multimetal MOF precursors for high-performance anode materials in SIBs.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
Advanced Science
·
2021
·Vol. 9
·期 5
·2104630
·
IF 16.806
Xi Chen,Malin Li,Shi-Ping Wang,Chunzhong Wang,Zexiang Shen,Fu-Quan Bai,Fei Du
Selenium-based materials are considered as desirable candidates for potassium-ion and sodium-ion storage. Herein, an in situ fabrication method is developed to prepare an integrated cuprous selenide electrode by means of directly chemical selenization of the copper current collector with commercial selenium powder. Interestingly, only the electrolyte of 1 m potassium hexafluorophosphate dissolved in 1,2-dimethoxyethane with higher highest occupied molecular orbital energy and lower desolvation energy facilitates the formation of polyselenide intermediates and the further selenization of the copper current collector. Benefiting from the unique thin-film-like nanosheet morphology and the robust structural stability of the integrated electrode, the volume change and the loss of selenide species could be effectively restrained. Therefore, high performance is achieved in both potassium-ion batteries (462 mA h g −1 at 2 A g −1 for 300 cycles) and sodium-ion batteries (775 mA h g −1 at 2 A g −1 for 4000 cycles). The facile fabrication strategy paves a new direction for the design and preparation of high-performance electrodes.
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
危险品化学品经营许可证（带存储）