Journal of Materials Chemistry A
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2017
·Vol. 5
·期 9
·4513-4526
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IF 8.867
Hongmei Li,Xing Qian,Changli Zhu,Xiancai Jiang,Li Shao,Linxi Hou
Tubular-structured nanomaterials with tailorable crystal structures and shell architectures whose properties can be tuned without changing their chemical compositions are attractive in electrochemical energy conversion and storage fields. Herein, we report the fabrication of tubular-structured orthorhombic CoSe2 (o-CoSe2) and cubic CoSe2 (c-CoSe2) by calcining monoclinic Co3Se4 nanotubes (Co3Se4 NTs) prepared by a facile precursor transformation method. Benefiting from advantageous structural features, including functional shells and well-defined interior voids, the tubular-structured o-CoSe2 showed a high power conversion efficiency of 9.34% as a counter electrode catalyst for dye-sensitized solar cells (DSSCs), superior to that of a Pt counter electrode (8.15%), under AM 1.5 G irradiation. In addition, the o-CoSe2 nanotubes also demonstrated excellent electrocatalytic activity in terms of low onset overpotential (∼54 mV) and small Tafel slope (∼65.9 mV per decade) as a hydrogen evolution reaction (HER) catalyst in alkaline medium. Hence, this work provides a promising strategy to selectively design and synthesize highly active electrocatalysts for energy conversion.
研究领域:
材料科学
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电化学
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能源转换与存储
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DOI
高影响因子
FOOD CHEMISTRY
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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
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食品安全监测
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纳米材料
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异质结构
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等离子体辅助合成
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缺陷工程
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DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
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2023
·
IF 6.6
Li-Wen Jiang,Long Chen,Yong-Zheng Wu,Hong Liu,Jian-Jun Wang
Transition metal selenides possess unique electronic properties and functional tunability, making them promising electrocatalysts for various applications. However, the structure evolution of cobalt selenide and its effect on catalytic activity and stability under alkaline hydrogen evolution reaction (HER) have not been fully understood. Herein, this study investigates the structure evolution, catalytic activity, and stability of Co 3 Se 4 electrodes under alkaline HER. Continuous Se leaching transforms Co 3 Se 4 into Co(OH) 2 during HER, leading to an activation process in the early stage and a decay process in the later stage. Adding SeO 3 2− ions in the electrolyte effectively inhibits Se leaching and excessive hydroxylation, enhancing stability. Mechanistic studies show that SeO 3 2− added to the electrolyte can increase the concentration of SeO 3 2− ions in the electric double layer to regulate the dynamic balance of Se leaching. This work provides insight into structure evolution, dynamic activity regulation, and stability of electrode materials during electrochemical reduction processes.
研究领域:
电化学
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材料科学
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催化
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Xing Qian,Hao Yu,Wenbin Chen,Jianhua Wu,Juan Xia,Ming Chen,Yonglian Xiong,Xiancai Jiang
Among the various non-precious metal catalysts that drive hydrogen evolution reactions (HERs) and dye-sensitized solar cells (DSSCs), transition metal selenides (TMSs) stand out due to their unique electronic properties and tunable morphology. Herein, the multicomponent selenide CuSe-Co 3 Se 4 @VSe 2 was successfully synthesized by doping with metal element vanadium and selenization on the copper-cobalt carbonate hydroxide (CuCo-CH) template. CuSe-Co 3 Se 4 @VSe 2 exhibited the dandelion-like cluster structure composed of hollow nanotubes doped with VSe 2 nanoparticles. Due to the unique structure and the synergistic effect of various elements, CuSe-Co 3 Se 4 @VSe 2 showed excellent alkaline HER and DSSC performances. The DSSC based on CuSe-Co 3 Se 4 @VSe 2 exhibited an impressive power conversion efficiency (PCE) of 9.64 %, which was much higher than that of Pt (8.39 %). Besides, it possessed a low HER overpotential of 76 mV@10 mA cm −2 and a small Tafel slope of 88.9 mV dec −1 in 1.0 M KOH.
研究领域:
材料科学
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能源化学
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Dafeng Zhang,Dong Zhang,Yutong Zhao,Fuping Zhao,Xipeng Pu,Hengshuai Li,Junchang Liu,Xue-Yang Ji
The rational design of excellent visible light photocatalysts that efficiently utilize the solar spectrum is urgently needed. In this work, ZnIn 2 S 4 (ZIS) and Co 3 Se 4 (CS) were coupled by a multistep process involving simple ultrasonic self-assembly and calcination to form ZnIn 2 S 4 /Co 3 Se 4 (ZIS/CS) photocatalysts with synergistic S-scheme heterojunctions and photothermal effects, which realized efficient photocatalytic hydrogen (H 2 ) production with optimal H 2 yield of 2.46 mmol h −1 g −1 , superior to pure ZIS (0.47 mmol h −1 g −1 ) by a factor of 5.23. The excellent cyclic stability and wide environmental adaptability to the ionic environment of water of ZIS/CS were proved. The positive impaction of photothermal effect on the H 2 yield of ZIS/CS was investigated and confirmed by the temperature change of photocatalysts powder or photocatalytic system under light irradiation. In addition, based on a series of characterization analyses and first-principle simulation calculations, a charge transfer pathway for ZIS/CS S-scheme heterojunctions was proposed. This work provides valuable ideas and feasible research methods for the design of stable and practical photocatalysts.
研究领域:
材料科学
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化学工程
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环境科学
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光催化
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能源材料
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2021
·
IF 6.707
Pei Zhu,Yan Wang,Minghang Zhang,Yingdong Wu,Wangfeng Cai
In order to investigate the influence of the anions on the electrochemical performance of cobalt-based compounds, Co 3 O 4 and Co 3 Se 4 are studied and theoretically analyzed with the density functional theory (DFT). Avoiding of the traditional synthesis of the high-temperature annealing for the transition metal oxides, the cubic spinel phase Co 3 O 4 on a nickel foam (NF) substrate with a simple two-step hydrothermal method and Co 3 Se 4 with the core-branched structure by anions exchange method are prepared. The electrochemical measurements show that the capacitance and conductivity of Co 3 Se 4 are significantly better than those of Co 3 O 4 , and Co 3 Se 4 still maintain high capacity at high current density. Furthermore, the kinetics of electrode material Co 3 O 4 and Co 3 Se 4 are analyzed and compared. According to the calculation of the density of states, the results show the band gap of Co 3 O 4 is 2.18 eV and the Fermi energy line of Co 3 Se 4 enters into the conduction band, which means the conductivity of Co 3 Se 4 is better than that of Co 3 O 4 . Additionally, three redox reactions during the charge and discharge process of Co 3 O 4 are determined and the band gaps changes are also calculated.
研究领域:
材料科学
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电化学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Hao Wang,Xueya Deng,Alina Bari,Mingzheng Gu,Man Lin,An Gao,Xiaomin Huang,Xiaojun Zhang
In order to enhance the energy efficiency of water electrolysis, it is imperative to devise electrocatalysts for oxygen evolution reaction that are both non-precious metal-based and highly efficient. Efficient catalyst design is generally based on electronic structural engineering. Considering the electronegativity disparity between selenium (Se) and tellurium (Te), the tunable bandgaps, and the conductive metallic nature of Te . We designed a material wherein Te atoms are uniformly doped onto the surface of Cobalt tetra selenide (Co 3 Se 4 ) nanorods, leading to the synthesis of a defect-rich material. Experimental results demonstrate that Te doping in Co 3 Se 4 increases active sites and optimizes the electronic structure of Co cations, enhancing the design of multi-defect structures. This promotes the generation of the Co(oxy) hydroxide (CoOOH) active phase, enhancing catalytic activity by maximizing the binding strength between Co sites and oxygenated intermediates. Te-Co 3 Se 4 nanorods exhibit good catalytic activity for oxygen evolution reactions, with an overpotential of 269 mV at a driving current density of 50 mA cm −2 and excellent stability in alkaline media (over 100 h). This discovery indicates the feasibility of strategically combining various imperfect structures, thereby unlocking the latent potential of diverse catalysts in electrocatalytic reactions.
研究领域:
材料科学
·
电化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Yihao Li,Rongrong Cui,Xiyue Li,Lintao Yang,Yanbing Zhu,Yongzhe Li,Haiqin Zhang,Hongyao Xue
Regulating the electronic spin state of electrocatalysts is critical for enhancing the hydrogen evolution reaction (HER). Unlike multi-step catalytic reactions that require dynamic spin-state transitions, HER demands a stable, high-activity spin state throughout the catalytic process. However, maintaining this specific spin state remains challenging. The intrinsic high-spin Co 3+ sites of Co 3 Se 4 provide excellent theoretical HER activity, but intermediate adsorption during the reaction drains local electron density, altering the crystal field and causing the high-spin state to degrade. Herein, we propose an interfacial electron injection strategy to stabilize the highly active spin state by constructing a CoSe@Co 3 Se 4 heterostructure. The built-in electric field arising from the work-function difference promotes interfacial electron redistribution from CoSe toward the Co 3 Se 4 active sites. In situ spectroscopy and theoretical calculations reveal that interfacial electronic redistribution substantially mitigates the local electron depletion induced by intermediate adsorption. Consequently, the interfacial electronic and structural buffering provides a favorable local environment for stabilizing the high-spin Co 3+ state at the catalytically relevant Co sites, which optimizes orbital interactions with intermediates and significantly lowers the energy barrier for water dissociation. Benefiting from this stabilized high-spin Co 3+ state, the CoSe@Co 3 Se 4 catalyst achieves an ultralow overpotential of 12 mV at 10 mA cm −2 for HER. This work provides a fundamental understanding of spin-state instability and offers a promising interface-engineering pathway to stabilize the highly active spin-state for advanced electrocatalysis. Download: Download high-res image (195KB) Download: Download full-size image
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Wei Zhao,Wangjun Feng,Jingzhou Chen,Yueping Niu,Li Zhang
Lithium-sulfur batteries can have several times the energy density of conventional lithium-ion batteries and are a likely replacement for such batteries in high-daensity storage systems. Nevertheless, slow reaction kinetics, the shuttle effect of polysulfides and a low Coulomb efficiency hinder the commercialization of lithium-sulfur batteries. In this work, a polar Co 3 Se 4 nitrogen-doped porous carbon (Co 3 Se 4 -N-C) framework material was synthesized from ZIF-67 and used as a sulfur substrate for Li-S batteries to retard the shuttle effect of LiPSs and improve the cycling stability. Based on experiments and theoretical calculations, it is proven that Co 3 Se 4 -N-C is an effective electrode material to promote polysulfide conversion. The specific capacity of discharge at 0.1 C reaches 1370.9 mAh g −1 , with a decay rate of 0.057 % per cycle after 500 cycles at 1 C.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）