JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Feng-bo Guo,Xin-ya Zhao,Yi-miao Yu,Jing Cheng,Kan-kan Liu,Li-xin Zhang
Hydrogen production by electrochemical water splitting is one of the best ways to store renewable energy. Metal organic framework (MOF)-derived non-precious metal catalysts are an effective idea for large-scale commercialization and electrolysis of water for hydrogen production. Herein, we have synthesized Ni,Mo bimetallic selenide MoSe 2 @NiSe 2 heterojunctions with hollow core-shell using a selenization reaction to combine MoSe 2 with NiMOF-derived NiSe 2 . The spherical clusters of MoSe 2 prevents the agglomeration and sintering of NiSe 2 and shorten the electron transfer distance form MoSe 2 to NiSe 2 . The electron flow between the transition metals Ni and Mo after the selenization reaction, which alters the electronic structure of NiMOF and MoSe 2 . NiSe 2 derived from NiMOF provides more active center as well as better conductivity to accelerate the electron transfer rate. Thus facilitating the HER catalytic process. Electrochemical analysis confirmed that the activity of Hydrogen evolution reaction (HER) of MoSe 2 @NiSe 2 was significantly increased in 0.5 M H 2 SO 4 , with an overpotential of 187 mV at 10 mA cm −2 and a tafel slope of 71.43 mV dec −1 . This work provides a new route for the design and preparation of the NiMOF-based catalysts in HER.
研究领域:
材料科学
·
电化学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2020
·
IF 16.683
Lei Yang,Liutao Huang,Yihang Yao,Lifang Jiao
High-efficiency electrocatalysts for water splitting can be achieved by constructing heterostructure engineering purposely. The same pyrite structure of NiSe 2 /NiP 2 with admirable electrical conductivity of NiSe 2 and outstanding stability of NiP 2 is designed to boost electrocatalytic performance towards overall water splitting. Density functional theory (DFT) calculations identify that constructing NiP 2 /NiSe 2 heterointerfaces with good lattice matching and the redistribution of electron between the heterointerfacecan optimize adsorption/desorption energy of H* effectively. Therefore, NiP 2 /NiSe 2 heterostructure on carbon fiber cloth with one-step phosphoselenization is developed as electrocatalysts. As expected, NiP 2 /NiSe 2 exhibits excellent catalytic activity with only 160 mV overpotential to realize a current density of 100 mA cm −2 and exceptional stability over 90 h at the current density of 10 mA cm −2 for HER in alkaline solution. This heterostructure strategy might be a new break-through for modulating the single-phase transition metal and designing highly active and durable catalysts towards water splitting.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Xiaocheng Xu,Haijun Liao,Le Huang,Sijie Chen,Rui Wang,Sheng Wu,Yanxue Wu,Zhipeng Sun,Haitao Huang
The construction of cost-effective electrocatalysts with remarkable activity and durability for the urea oxidation reaction (UOR) is urgently needed to achieve sustainable hydrogen production . Herein, a three-dimensional (3D) nanostructure with uniform NiSe 2 /MoSe 2 Mott-Schottky heterojunction nanoneedle arrays densely grown on carbon cloth was designed and fabricated by a hydrothermal method followed by selenization treatment. In the UOR process, NiSe 2 /MoSe 2 undergoes surface reconstruction into a Mo-NiOOH/NiSe 2 composite structure, and Mo-doping can optimize the adsorption/desorption of UOR intermediates. In the hydrogen evolution reaction (HER) process, the directed electron transfer brought by the Mott-Schottky heterojunction can modulate the electronic structure and optimize the d-band center, thus promoting HER. The well-designed NiSe 2 /MoSe 2 as a bifunctional catalyst for urea-assisted electrolysis can reach 10 mA cm −2 at only 1.44 V with almost no performance degradation for 48 h. This work provides a promising avenue to develop efficient HER/UOR bifunctional catalysts toward urea-assisted water electrolysis.
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
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Wenyue Jiang,Bingxin Zhao,Ziting Li,Peng Zhou,Yuxin Zhao,Xiaoshuang Chen,Jinping Wang,Rui Yang,Chunling Zuo
The investigation of cost-effective and highly efficient electrocatalysts for alkaline water and simulative seawater oxidation is essential to the conversion and storage of renewable energy . In this paper, the Ce–NiSe 2 /CoP catalyst with multihole and ultrathin nanosheet structure is generated. The unique structural characteristics of Ce–NiSe 2 /CoP heterojunction nanosheets contribute the excellent OER performance under different alkaline 1 M KOH and simulated seawater (1 M KOH + 0.5 M NaCl) electrolytes. Specifically, this catalyst exhucture is generated. The unique structural characteristics of Ce–NiSe 2 /CoP heterojunction nanosheets conibits the low overpotentials of 287 and 304 mV at the current density of 10 mA cm −2 , along with the Tafel slopes of 87.1 and 78.8 mV dec −1 in two solutions, respectively. Moreover, the Ce–NiSe 2 /CoP target product also displays good stability. The present study introduces a promising strategy for the advancement of high-performance electrocatalysts in green energy field.
研究领域:
材料科学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2023
·Vol. 10
·期 22
·6674-6682
·
IF 7
Yiqiang Sun,Wenwen Cao,Xuening Ge,Xiaodong Yang,Yong Wang,Yuan Xu,Bo Ouyang,Qi Shen,Cuncheng Li
The direct urea fuel cell (DUFC) with high energy efficiency and convenience is expected to have promising practical applications in green energy development, but it is severely hindered by the slow kinetics of the intrinsic urea oxidation reaction (UOR). Herein, a built-in electric field (BEF) strategy to obtain efficient heterogeneous Ni2P/NiSe2 electrocatalysts as bifunctional electrocatalysts for both the hydrogen evolution reaction (HER) and the UOR is reported. XPS, energy band structure analysis and DFT calculations verify that the BEF in the heterojunction can induce electron transfer between Ni2P and NiSe2. More importantly, the BEF-induced interfacial charge distributions endow the Ni2P/NiSe2 heterogeneous electrocatalysts with optimized binding free energy of the H* and urea intermediates, thereby resulting in an intrinsic enhancement of the catalytic activity. Our work may explore a pathway to design efficient bifunctional electrocatalysts by precisely constructing and manipulating an interfacial BEF.
研究领域:
材料科学
·
催化化学
·
能源转换
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Yiting Yan,Fanghua Liu,Zihan Liu,Lin Yang,Miao Hu,Jun Zhang,Tong Xu,Yongjian Ai,Xue Jiang
Formaldehyde, a known carcinogen, has been used illegally as a multipurpose food ingredient. However, unapproved use poses serious health risks, necessitating rapid food safety detection. Electrochemical sensing has emerged as a viable platform for formaldehyde detection and analysis because of its straightforward operation and high sensitivity. In this paper, we propose a plasma-assisted nanostructure method to prepare selenium-rich NiSe 2 /Co 3 Se 4 heterointerfaces (NiSe 2 /Co 3 Se 4 @N-C) in ultrathin N-doped carbon matrix using NiCo-MOF precursors synthesized by dielectric blocking discharge (DBD) microplasma and selenation process. Three synergistic mechanisms are integrated into the hierarchical architecture: conductive carbon scaffolds creating electron highways, selenium vacancies enhancing reactant adsorption through localized electron enrichment, and heterojunctions facilitating interfacial charge transfer via built-in electric fields. The sensor has remarkable analytical capabilities, including a sub-ppm detection limit (3.94 μM), linear range (8–500 μM), and high stability. The defect-engineering and heterostructure design paradigm open new possibilities in food safety monitoring.
研究领域:
电化学传感
·
食品安全监测
·
纳米材料
·
异质结构
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等离子体辅助合成
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缺陷工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 47
·18052-18062
·
IF 8.067
Yayun Zheng,Xirui Kong,Lang He,Yi Song,Yan Zhao
A facile solid-state Matryoshka doll-like microwave strategy is developed to synthesize composites of NixSey and nitrogen-doped porous carbon (N–C). The crystal structures and morphology of NixSey/N–C are investigated with different feeding mass ratios of Ni/Se and at different microwave processing times. Thereinto, NiSe2/N–C is rapidly prepared in just 20 minutes. The physical–chemical properties of NiSe2/N–C are further investigated and the composite has shown good ion/electron transfer kinetics and structural stability for sodium storage. When employed as the anode of sodium ion batteries (SIBs), NiSe2/N–C shows a high reversible capacity of 374.4 mA h g−1 at 0.2 A g−1 and excellent cycling stability, retaining 95% of its initial capacity at 1.0 A g−1 after 2000 cycles. The good electrochemical performance is attributed to the synergistic effect between the highly active NiSe2 nanoparticles and the 3D conductive N–C frameworks, which expedites the charge-transfer rate and improves the reversibility of the charging/discharging reactions. The excellent Na+ storage kinetics of the NiSe2/N–C electrode results from its low adsorption energy of −0.94 eV and low energy barrier of 0.818 eV. This work provides a feasible microwave synthetic strategy to fabricate SIB electrode materials.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Yu Zhou,Yuying Duan,Yancen Liu,Yongjuan Geng,Zuquan Jin,Liangmin Yu,Shaochun Li
To address the challenges of impedance mismatch and corrosion in electromagnetic wave absorption materials, this work synthesized NiSe 2 /NC/Ti 3 C 2 T x MXene composites by integrating the advantages of modified Ti 3 C 2 T x MXene and MOF-derived materials. The precursors for the Ni-MOF and MXene were prepared using a combination of multiple etching and microwave methods, followed by in-situ selenization pyrolysis under an argon atmosphere. By tuning the MXene content, the morphology, specific surface area, porous structure, and electromagnetic properties of the composites were precisely controlled. Under optimal conditions (pyrolysis temperature of 600 °C), the composite achieved a minimum reflection loss of −58.46 dB at 5.68 GHz with a thickness of 1.5 mm, within the 2–18 GHz frequency range. This outstanding performance is attributed to the synergistic effects of conduction loss, dipole and interface polarization, magnetic resonance, multiple electromagnetic reflections and scattering, and well-balanced impedance matching. Additionally, the composite exhibits excellent corrosion resistance, making it highly suitable for complex and challenging service environments. This work presents a novel strategy for developing materials with dual functions of superior electromagnetic wave absorption and corrosion resistance.
研究领域:
材料科学
·
电磁学
·
腐蚀科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 30
·16268-16279
·
IF 14.511
Hui Zheng,Jianyi Wang,Hongwei Li,Shuqi Deng,Yinze Zuo,Wei Yan,Jiujun Zhang
Sodium-ion batteries (SIBs) are among the most promising technologies for large-scale clean electrical energy storage and conversion. Developing SIB anode materials, which pose the major limitation in achieving high performance, including transition metal selenides (TMSe) with high sodium storage capacities is currently the cutting-edge research. In this paper, heterostructured NiSe2/CoSe2 nanoparticles are successfully synthesized by simple thermal selenization of a heterojuncted Ni(OH)2/Co(OH)2 precursor obtained through one-step solvothermal co-precipitation. Electrochemical tests and DFT calculations as well as in situ XRD measurements are used for investigating the Na storage properties and understanding the underlying mechanism. It is found that the heterointerface formed at the crystalline planes of NiSe2 and CoSe2 significantly improves the electron conductivity and optimizes the Na species adsorption, which accelerates electrochemical reaction kinetics and thus improves pseudocapacitive contribution. Therefore, the as-prepared NiSe2/CoSe2 nanoparticles exhibit superior Na storage properties such as enhanced Na storage capacity and rate capability as well as exceptional cycling stability at ultra-high current density.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Shan Ni,Hongnan Qu,Zihao Xu,Xiangyang Zhu,Huifang Xing,Li Wang,Jiemiao Yu,Huizhou Liu,Congmei Chen,Liangrong Yang
Heterogeneous electrocatalysis usually involves the charge transfer between the surface of electrocatalysts and corresponding reactants. Thus, modulating the surface electron density of electrocatalysts is an effective strategy to boost the electrocatalytic activity of targeted reactions. Herein, the NiSe 2 /FeSe 2 p-p heterojunction is constructed via a simple selenization method for both oxygen evolution reaction (OER) and urea oxidation reaction (UOR). The designed NiSe 2 /FeSe 2 electrocatalyst exhibits a superior activity towards OER, which only requires a low overpotential of 256 mV to reach a current density of 10 mA cm −2 , and surpasses other selenides and even the state-of-the-art RuO 2 . Impressively, when employed as the UOR electrode, the NiSe 2 /FeSe 2 heterojunction needs only 127 mV overpotential at 50 mA cm -2 , remarkably superior to other selenides and confirming the less energy consumption for UOR. The comprehensive analysis demonstrates that the well-designed built-in electric field at the heterointerface of NiSe 2 /FeSe 2 p-p heterojunction due to the difference of energy levels can expedite the charge transfer and thus strengthen the conductivity of heterojunction electrocatalyst. Moreover, the self-driven electron transfer across the NiSe 2 /FeSe 2 heterointerface can induce local charge redistribution at the interface region, which is beneficial for the adsorption of OH − and urea owing to the electrostatic interaction. Therefore, the designed NiSe 2 /FeSe 2 p-p heterojunction with regulated electronic structure displays extraordinary electrocatalytic activity for both the OER and UOR. This study demonstrates a novel strategy to manipulate the surface/interface charge states of electrocatalysts for improving the catalytic activity of OER and UOR, and provides new guidelines for exploring other superior electrocatalysts.
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
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
He Wang,Hongling Guo,Zihao Huang,Weiliang Liu,Mei Li,Jinshui Yao,Jiaxi Cui,Yuanhao Wang,Manman Ren
The high activity barriers of Li 2 S nucleation and deposition limit the redox reaction kinetics of lithium polysulfides (LiPSs), meanwhile, the significant shuttle effect of LiPSs hampers the advancement of Li-S batteries (LSBs). In this work, a NiSe 2 /CoSe 2 -rGO (NiSe 2 /CoSe 2 -G) sulfur host with bifunctional catalytic activity was prepared through a hard template method. Electrochemical experiment results confirm that the combination of NiSe 2 and CoSe 2 not only facilitates the bidirectional catalytic function during charge and discharge processes, but also increases the active sites toward LiPSs adsorption. Simultaneously, the highly conductive rGO network enhances the electronic conductivity of NiSe 2 /CoSe 2 -G/S and provides convenience for loading NiSe 2 /CoSe 2 catalysts. Benefitting from the exceptional catalytic-adsorption capability of NiSe 2 /CoSe 2 and the presence of rGO, the NiSe 2 /CoSe 2 -G/S electrode exhibits excellent electrochemical properties . At 1C, it demonstrates a low capacity attenuation of 0.087 % per cycle during 500 cycles. The electrode can maintain a discharge capacity of 927 mAh/g at a sulfur loading of 3.3 mg cm −2 . The bidirectional catalytic activity of NiSe 2 /CoSe 2 -G offers a prospective approach to expedite the redox reactions of active S, meanwhile, this work also offers an ideal approach for designing efficient S hosts for LSBs.
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
危险品化学品经营许可证（带存储）