Journal of Environmental Sciences
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2026
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IF 6.5
Dengxiang Zhang,Tianqi Chen,Shuai Liu,Lian Duan,Ning Zhang
Electrochemical nitrate reduction has emerged as a sustainable route for green ammonia synthesis. Cobalt oxide exhibits high activity owing to its efficient proton generation from water electrolysis. Nevertheless, the unsynchronized proton supply and nitrogen oxide intermediate conversion results in competing H 2 evolution and reduced ammonia selectivity. To address this issue, we designed a Co 3 O 4 @CoS 2 nano-heterostructure catalyst by introducing CoS 2 (with excellent NO x adsorption performance) via hydrothermal synthesis. Electrocatalytic tests showed that the as-prepared Co 3 O 4 @CoS 2 nanocatalyst achieved a Faradaic efficiency of 99.91 % and an NH 3 yield of 23.97 mg/ (h·cm 2 ) at −0.3 to −0.7 V vs. RHE, significantly outperforming pristine Co 3 O 4 and CoS 2 . Results from in-situ Raman spectroscopy and density functional theory calculations revealed that the superior performance stems from enhanced NO x adsorption/hydrogenation and a reduced reaction energy barrier of Co 3 O 4 @CoS 2 with CoS 2 incorporation. This work proposes a facile and efficient heterostructure construction strategy, offering new insights into the design of electrocatalysts for NH 3 synthesis.
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高影响因子
IONICS
·
2026
·
IF 3.4
Zhang Wei,Lan Yunfei,Zheng Xueliang,Zhang Yu,Shen Wei
Short-duration and repetitive power fluctuations associated with train acceleration, braking, and regenerative-energy recovery require energy-storage devices with rapid response, high-rate capability, and stable cycling. Here, a CoS 2 /Nd 2 O 3 composite positive electrode prepared at a confirmed Co/Nd molar feed ratio of 2:1 and a sulfur-treated carbon-nanotube (S-CNT) negative electrode were combined in an aqueous asymmetric supercapacitor. The composite exhibited a predominantly mesoporous architecture with a Brunauer–Emmett–Teller surface area of 213.21 m 2 g −1 , while the S-CNTs retained a continuous one-dimensional conductive network and sulfur-related surface species. The CoS 2 /Nd 2 O 3 electrode delivered 1961 F g −1 at 1 A g −1 and retained 1401 F g −1 at 20 A g −1 , with 87.6% capacitance retention after 10,000 cycles. The S-CNT electrode delivered 431 F g −1 at 1 A g −1 , 28.7% above untreated CNTs under the same conditions, and retained 81.0% at 20 A g −1 . The two-electrode device retained 73.3% of its 1 A g −1 capacitance at 15 A g −1 and approximately 95.0% after 10,000 cycles. A retrospective first-order charge-balance analysis indicates that further optimization of the electrode mass ratio would be beneficial. These results support the tested material pair as a laboratory-scale platform for short-duration power buffering, while composition optimization, complete-device impedance characterization, and application-specific pulse validation would further strengthen its assessment for rail-transit applications.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Wei Xia,Congling Li,Li Zhang,Xuemin Yu,Li Zheng,Rui Liu,Aifeng Lv
The development of highly efficient electrocatalysts is of utmost importance for advancing electrochemical energy conversion technologies. Transition metal sulfide heterostructure electrocatalysts have been widely studied and applied in electrocatalysis due to their highly inherent activity in the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) at the interface. We prepared NiS 2 /CoS 2 nanoparticle heterostructures doped with nitrogen-carbon nanotubes (CoS 2 /NiS 2 @N-CNTs) to induce the formation of bifunctional reaction sites. This design contributes to the excellent catalytic activity for electrocatalytic water splitting. The CoS 2 /NiS 2 @N-CNTs electrocatalyst exhibits prominent catalytic activities toward HER and OER, which required low overpotentials of 126 and 205 mV to yield the current density of 10 mA cm −2 in 1 M KOH. The prepared electrocatalysts exhibit fast reaction kinetics with tafel slopes of 71 and 82 mV dec −1 in HER and OER, respectively. The catalyst has a larger electrochemically active surface area (ECSA) of 1030 cm −2 and a strong electron transfer capability with an electrochemical impedance of 41 Ω. These properties are mainly attributed to the unique heterogeneous structure of the catalyst. In addition, CoS 2 /NiS 2 @N-CNTs catalyst is used as both the cathode and anode to fabricate a two-electrode system in a 1.0 M KOH solution measured at 1.53 V. Meanwhile, the stability measurement maintains for 23 h at a current density of 10 mA cm −2 with negligible degradation. This work has successfully developed an approach for rational design and novel synthesis of metal sulfide hybrids as bifunctional electrocatalysts with high activity and stability for overall water splitting.
研究领域:
材料科学
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电化学
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能源技术
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高影响因子
ChemSusChem
·
2024
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IF 7.5
Min Cui,Yanan Yuan,Yue Wu,Zhongmei Che,Peixuan Li,Xiaochen Yang,Yuqi Chen,Wei Hu,Jingui Wang,Shuai Wang,Yingshu Guo,Zexing Wu
Graphical This graphical abstract visually summarizes the main findings of the study, showcasing how the strategic design of a GDY-induced CoN/CoS 2 heterojunction within a nitrogen-doped carbon substrate leads to a more efficient and durable electrocatalyst for both oxygen reduction and evolution reactions in high-performance zinc-air batteries. The performance of zinc-air battery is constrained by the sluggish rate of oxygen electrode reaction, particularly under high current discharge conditions where the kinetic process of the oxygen reduction reaction (ORR) decelerates significantly. To address this challenge, we present a novel phase transition strategy that facilitates the creation of a heteroatom-doped heterointerface (CoN/CoS 2 ). The meticulously engineered CoN/CoS 2 /NC electrocatalyst displays a superior ORR half-wave potential of 0.87 V and an OER overpotential of 320 mV at 10 mA cm −2 . Experimental and computational analysis confirm that the CoN/CoS 2 heterostructure optimizes local charge distribution, accelerates electron transfer, and tunes active sites for enhanced catalysis. Notably, this heterojunction improves stability by resisting corrosion and degradation under harsh alkaline conditions, thus demonstrating superior performance and longevity in a custom-made liquid zinc-air battery. This research provides valuable practical and theoretical foundations for designing efficient heterointerfaces in electrocatalysis applications.
研究领域:
材料科学
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电化学
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能源存储与转换
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PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
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IF 7.46
Jie Yang,Lu Yang,Xin Tang,Yu Zhang,Qiaoyan Dong,Zhiyuan He,Nihong Li,Ke Huang,Hong Luo,Xiaoli Xiong
As a highly toxic substance that may be harmful to the environment and human beings, hydrazine has been paid growing attention in the field of electrochemical detection . Using the organometallic framework as a template and taking advantage of its high porosity, we prepared cobalt disulfide rhombic dodecahedral nanocomposites with nitrogen coordination and graphene coating (N-CoS 2 @graphene) in this study. Nitrogen coordination can effectively boost the intrinsic activity of the active site by modulating the electronic structure of the Co center in N-CoS 2 @graphene. The surface graphene layers not only work as protective layers to enhance stability but also promote electron transfer. It has been proved that this electrocatalyst has excellent hydrazine electrochemical sensing performance with a high sensitivity of 1580 μA mM −1 cm −2 , a low detection limit of 30 nM at S/N = 3, a linear range from 1.0 μM to 1.0 mM, and satisfactory reproducibility and stability at 0.1 V. It can be seen that this catalyst has a very attractive application prospect in an electrochemical sensor .
研究领域:
材料科学
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环境科学
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分析化学
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高影响因子
Journal of Energy Storage
·
2023
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IF 9.4
Qingmiao Zhang,Tianhao Yao,Qiangrui He,Heng Wang,Zhicheng Liu,Daquan Wang,Hongkang Wang,Lingjie Meng
Transition metal sulfides (TMSs) have been considered as up-and-coming anode materials for lithium-ion batteries (LIBs) owing to their large theoretical capacity and good reversibility . However, obvious volume variation and sluggish kinetics greatly limit their practical application. To address this issue, we successfully design and fabricate hollow CoS 2 /MoS 2 nanospheres and effectively enhance their lithium storage performance via N-doped carbon-coating (CoS 2 /MoS 2 @N-C). The unique hollow structure provides shortened ion-diffusion path, while the N-doped carbon shells buffer the severe volume changes during cycling and improve the electronic conductivity of the electrode. When used as an anode material for LIBs, the CoS 2 /MoS 2 @N-C displays high specific capacity (1056.9 mA h g −1 at 100 mA g −1 ), excellent cycling stability (653.9 mA h g −1 after 250 cycles at 1000 mA g −1 ), and rate capability (685 mA h g −1 at 2000 mA g −1 ). The CoS 2 /MoS 2 @N-C||LiFePO 4 full-cell LIB is also assembled and exhibits remarkable performance. The remarkable electrochemical performance of CoS 2 /MoS 2 @N-C electrode could be assigned to the synergistic enhancement effect of the N-doped carbon coating and hollow structure, which efficiently shorten the ion diffusion path , boost the charge transfer rate, and alleviated the volume changes of the electrode upon cycling.
研究领域:
材料科学
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电化学
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Lianshan Sun,Chunyu Yue,Jianxun Zhao,Peng Chen,Heng Liu,Xinwei Wang,Wanqiang Liu
The three-dimensional mesh CoS 2 -MoS 2 -CNT composite material with abundant pores was prepared by two-step hydrothermal method as CoS 2 -MoS 2 -CNT functional separator and introduced into lithium-sulfur battery. XRD , XPS and SEM tests of CoS 2 -MoS 2 -CNT proved that the material was successfully prepared, and its morphology was a three-position porous structure composed of interwoven nanotubes and nanosheets . The results of Li 2 S 6 adsorption experiment and visual penetration experiment show that CoS 2 -MoS 2 -CNT composite material has strong adsorption effect on LiPS, and can prevent LiPS from passing through the separator, which effectively inhibits the shuttle effect. CoS 2 -MoS 2 -CNT coating effectively plays the synergistic effect of each component to achieve effective fixation and transformation of LiPS, which solves the shortage of lithium-sulfur batteries. Cells with CoS 2 -MoS 2 -CNT functional separators have a high initial specific capacity (0.2C, 1411 mAh g −1 ), excellent rate performance and excellent cycle stability at large currents (0.13% attenuation per cycle at 2C).
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高影响因子
RENEWABLE ENERGY
·
2025
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IF 9.1
Jiewen Zhu,Gang Wu,Shasha Liu,Runjie Hu,Lifan Zhong,Jie Yang,Shu Zhang,Yong Huang
Methyl levulinate (ML) is a high-value platform chemical with broad applications. However, its efficient production from lignocellulosic biomass is hindered by the recalcitrant matrix of cellulose, hemicellulose, and lignin. This study demonstrates a two-step strategy for converting pine to ML, which couples biomass pretreatment with subsequent catalytic depolymerization over a P-doped CoS 2 catalyst. The regulatory mechanisms of three distinct pretreatments, including dilute acid washing, H 2 O 2 peroxidation, and alkaline extraction, on the physicochemical structure of pine were systematically investigated. The ML yield increased from 0 (untreated pine) to 2.6 wt% after acid washing, 7.3 wt% after peroxidation, and exceeded 17 wt% following alkaline extraction with 5 wt% NaOH. The enhancement is attributed to a synergistic mechanism whereby pretreatments not only improve biomass accessibility but also crucially eliminate compounds that poison the catalytic active sites. Acid washing removes ash components, mitigating the poisoning of Lewis acid sites on the catalyst. Peroxidation and alkaline extraction disrupt the lignin-carbohydrate complex, removing lignin-derived phenolics that cause catalyst deactivation. However, excessive oxidant or alkali concentrations degrade the cellulose structure, leading to yield attenuation. This work confirms that selecting an appropriate pretreatment is paramount to balancing component removal for the efficient valorization of pine into ML.
研究领域:
催化化学
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生物质能源
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绿色化学
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材料科学
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化学工程
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2021
·
IF 4.464
Quan Kong,Nanyu Fan,Siyi Chen,Xiaofen Wu,Lihua Liu,Ruifeng Lang,Zeyuan Gao,Hongtao Guan,Chengjun Dong,Gang Chen
The design and synthesis of non-noble bifunctional electrocatalysts with high efficiency for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is still ongoing for enhanced overall water splitting. Herein, the heterostructure N-doped nickel sulfide/cobalt sulfide (N-Ni 3 S 2 /CoS 2 ) catalyst was in situ growth on Ni foams (NF) via an electrochemical deposition method followed by rapidly vulcanizing process at low-temperature. Benefiting from the abundant interface, high conductivity of NF, large electrochemical surface area, N-Ni 3 S 2 /CoS 2 /NF catalyst exhibits excellent activity for both HER and OER. Low overpotentials of 245 and 100 mV can drive a current density of 10 mA cm −2 for OER and HER in 1.0 M KOH. Serving as the bifunctional catalysts, N-Ni 3 S 2 /CoS 2 /NF catalyst delivers the current density of 10 mA cm −2 at a very low cell voltage of 1.56 V in the water splitting reaction.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
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IF 12.5
Qing Wang,Lei Yuan,Jianyu Xu,Ning Zhao,Xingmei Guo,Fangyan Zhu,Ali Tian,Zhenming Zhang,Ge Yin,Junhao Zhang
Crystalline-amorphous CoS 2 -MnO x constructed via deposition-order regulation. • Amorphous MnO x underlayer transports electron and ion flux to electrode surface. • Optimized d-band center on crystalline CoS 2 promoting OER kinetics in seawater. • Electron-enriched surface and dissolved manganate species repelling chloride ions. • Conventional crystalline-on-crystalline anti-chloride overlayer dilemma overcomed. Conventional crystalline-on-crystalline anti-chloride overlayer structures for seawater oxidation electrocatalysis suffer from physical shielding of active sites and limited functional tunability due to lattice constraints. Herein, a crystalline-amorphous CoS 2 -MnO x heterostructure is constructed on graphite felt via a sequential electrodeposition-hydrothermal route, with deposition order mediating precise interface regulation. The as-prepared structure exhibits superior electrocatalytic performance for alkaline seawater oxidation, demanding low overpotentials of 170, 308, and 392 mV to achieve current densities of 10, 100, and 500 mA cm −2 , respectively, together with robust stability. Experimental investigation and theoretical calculation reveal that the heterostructure triggers electron transfer from MnO x to CoS 2 , generating a built-in electric field with interfacial charge redistribution. This modulates the d-band center and accelerates oxygen evolution kinetics. Meanwhile, surface electron enrichment synergizes with released manganate ions to effectively repel chloride ions from approaching and adsorbing. Such directional electron and ion fluxes endow the catalyst with excellent chloride-resisting and oxygen evolution performances in seawater electrolysis. This work demonstrates a facile strategy for constructing crystalline-amorphous heterostructures and elucidates the interfacial engineering mechanism for enhanced seawater oxidation, offering a promising new paradigm for advanced electrocatalysts in green hydrogen industry. To address the dilemma of conventional crystalline-on-crystalline anti-chloride overlayer structures for seawater oxidation, a crystalline-amorphous CoS 2 -MnO x heterostructure is fabricated via precise deposition-order regulation. The amorphous MnO x underlayer not only exposes abundant active CoS 2 sites but also transports electron and ion flux to the surface for OER promotion and Cl − repulsion, establishing a novel and promising paradigm for durable seawater electrocatalysis. Download: Download high-res image (193KB) Download: Download full-size image
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Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 22
·11435-11441
·
IF 11.301
Peng Liu,Jianyue Yan,Jianxin Mao,Jiawen Li,Dongxue Liang,Wenbo Song
The alkaline hydrogen evolution reaction (HER) is an extremely important reaction in energy conversion and electrolytic industries. Pristine MoS2 exhibits poor alkaline HER activity due to weak water adsorption and dissociation. Precisely manipulating active water dissociation components to form a functional interface with MoS2 would be an effective strategy. Herein, in-plane intergrowth CoS2/MoS2 ultrathin nanosheets have been achieved via a one-step pyrolytic sulfurization of a small-sized Co/Mo-MOF precursor. The in-plane intergrowth structure produced abundant interfaces and modulated the interfacial electronic structure, demonstrating an accelerated water dissociation process. Ultralow overpotentials at both onset (16 mV) and 10 mA cm−2 (75 mV) have been obtained, which surpass those of most top-rated MoS2-based materials and are even proximate to those of commercial Pt/C (0 mV at onset and 60 mV at 10 mA cm−2, respectively). Under a large current density of 400 mA cm−2, the intergrowth nanosheet exhibited long-term stability, showing potential for applications in alkaline water splitting devices.
研究领域:
材料科学
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能源转换技术
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Qiwei Zhang,Zhenlu Zhao
Transition metal disulfide compounds (TMDs) catalysts exhibit excellent catalytic ability in hydrogen evolution reaction (HER), but they are susceptible to OH- poisoning under strong alkali conditions leading to active site inactivation, thus affecting their catalytic activity and stability. In this regard, we propose a catalyst “self-protection” strategy against OH - attack. Specifically, we synthesized a composite heterojunction MnMoO 4 @CoS 2 /MoS 2 on carbon cloth (CC) by a hydrothermal and calcination process. The experimental results show that MnMoO 4 undergoes reconfiguration during the HER process, and its MoO 4 2- takes the lead in dissolving in the electrolyte before being re-adsorbed on the surface of the electrocatalyst to form a protective layer, which greatly inhibits the erosion of OH - on the catalyst and effectively prevents the oxidation of the Mo 4+ and the edge S sites, which is beneficial to the long-term stability of the catalyst. The CoS 2 /MoS 2 heterojunction provides more active sites and higher conductivity to enhance its catalytic activity. The products exhibit overpotentials of only 71 and 171 mV at current densities of 10 and 100 mA cm −2 , and have long-term stability of over 100 h. In comparison, the samples after base hydrolysis treatment (deprotection) showed a significant performance decay. This study provides a novel approach for the rational design of efficient and stable TMDs catalysts.
研究领域:
催化
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材料科学
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电化学
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纳米技术
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能量转换
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表面科学
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高影响因子
危险品化学品经营许可证（带存储）