ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Ming Zhao,Shan Zhang,Jian Lin,Weihua Hu,Chang Ming Li
The high overpotential of oxygen evolution reaction (OER) is the main limitation of electrolytic water splitting efficiency for hydrogen production . Herein, Fe doped Ni 3 S 2 /MnS heterostructured nanosheets were grown on Ni foam (Fe-Ni 3 S 2 /MnS@NF) via a simple one-step solvothermal reaction. As-synthesized Fe-Ni 3 S 2 /MnS@NF exhibits excellent OER electrocatalytic activity in 1 M KOH, with an extremely low overpotential of 259 mV at 50 mA cm −2 as well as a small Tafel slope (39 mV dec −1 ), much better than Ni 3 S 2 -, Fe-doped Ni 3 S 2 -, and Ni 3 S 2 /MnS- nanosheets grown on NF. Results clearly reveal that the better electrocatalytic performance of Fe-Ni 3 S 2 /MnS@NF than its rivals is mainly due to the synergistic effect of Fe-doping and Ni 3 S 2 /MnS heterojunctions. In details, heterojunction combination with Fe-doping not only improves the conductivity of catalysts but also modulates the electronic configuration of active sites and optimizes the adsorption capacity of oxygen-containing intermediates, thus achieving rapid reaction kinetics and high electrocatalytic performance. This work provides insights into the synergistic regulation of electrocatalytic activity of non-noble catalysts toward high efficiency energy conversion.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Dongxu Zhang,Yanhong Liu,Naiyun Liu,Tianyao Jiang,Xin Han,Qitao Chen,Jinrui Ding,Deli Jiang,Baodong Mao
Exploring low-cost and high-performance oxygen evolution reaction (OER) catalysts has attracted great attention due to their crucial role in water splitting. Here, a bifunctional Cu5FeS4/Ni3S2@NF catalyst was in situ formed on a nickel (Ni) foam toward efficient photoassisted electrocatalytic (P-EC) OER, which displays an ultralow overpotential of 260 mV at 30 mA cm–2 in alkaline solution, outperforming most previously reported Ni-based catalysts. It also shows great potential in degradation of antibiotics as an alternative anode reaction to OER owing to the prompt transfer of photogenerated holes. The photocurrent test and transient photovoltage spectroscopy indicate that the synergistic coupling of charge extraction and sinking effects in Cu5FeS4 and Ni3S2 is critical for boosting the OER activity via photoassistance. Electrochemical active surface area and electrochemical impedance spectroscopy tests further prove that the photogenerated electromotive force can effectively compensate the overpotential of OER. This work not only provides a good guidance for integrating photocatalysis and electrocatalysis, but also indicates the key role of synergistic extraction and utilization of photogenerated charge carriers in P-EC.
研究领域:
材料科学
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电化学
·
光催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Minghao Dou,Wensong Wang,Xiang Liu,Mengjie Yao,Kai Ding,Weiwei Lin,Xiuwen Cao,Chaoyue Li,Shenjie Li,Yanyan Chen
Compared with the oxygen precipitation reaction (OER), the theoretical application of urea oxidation reaction (UOR) with a smaller potential is more conducive to achieve H2 release, showing a strong application prospect in the field of wastewater treatment. However, the efficiency of the traditional nickel foam-based catalyst is still subject to the following two factors: the high oxidation potential of Ni3+ and the uncertainty of the oxidation and reduction active sites. Here, with the advantage of two-dimensional sheet porous high surface area, a Ni(OH)2 nanosheet was prepared by depositing ZIF-67 to inhibit the formation of Ni3+ and maximize the space utilization. Then, the NiS/Co3S4/Ni3S2 nano heterostructure was constructed to improve the interface electronic structure and optimize the adsorption energy of the intermediates via in situ vulcanization. The NiS shell on the surface of the catalyst provides sufficient reaction sites for the catalytically active substance NiOOH generated during the UOR at a lower oxidation potential. At a current density of 50/100 mA cm–2, the overpotential is only 1.330/1.340 V while maintaining the catalytic durability for 20 h. At the same time, the NiS/Co3S4/Ni3S2/NF nano heterostructure material shows good urea degradation performance and stability, which provides the possibility of degradation and treatment of industrial, agricultural, and domestic wastewater containing urea.
研究领域:
材料科学
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环境科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
BULLETIN OF MATERIALS SCIENCE
·
2024
·Vol. 48
·期 1
·1-11
·
IF 1.9
Wei D,Zhou Z F,Ma H H,Xu W B,Ren F M
Transition metal sulphides derived from metal–organic frameworks (MOFs) have gained increasing attention as promising electrode materials for energy storage, owing to their elevated theoretical capacitance and exceptional electrochemical features. Herein, a simple dual organic ligand strategy and controllable pyrolysis treatment were used to prepare porous micro-rods Co 9 S 8 /Ni 3 S 2 /NC-T (T denotes for temperature) composite materials. Their structure and composition can be precisely controlled by adjusting the pyrolysis temperature. Co 9 S 8 /Ni 3 S 2 /NC-T composite materials possess rich pore structures, unique three-dimensional carbon conductive networks and synergistic effects of Co 9 S 8 and Ni 3 S 2 . Experimental results of cyclic voltammetry revealed that the bimetal sulphides in Co 9 S 8 /Ni 3 S 2 /NC-T can provide substantial redox pseudocapacitance for electrochemical reactions. Electrochemical tests indicated that the optimal carbonization temperature was 700°C, and the Co 9 S 8 /Ni 3 S 2 /NC-700 electrode material has the highest specific capacity of 2288 F g −1 at a current density of 1 A g −1 and an excellent rate capability with retention of about 61.2% at a current density of 10 A g −1 . This study provides methodological guidance for the rational composition control and unique structure of MOF-derived materials for supercapacitors. Graphical
研究领域:
材料科学
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能源存储
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2025
·
IF 5.7
Kang Wei,Jun Li,Xiao Sun,Meng Shao,Jianguo Tang,Soowohn Lee
rGO/Ni(OH) 2 /Ni 3 S 2 composite electrode materials were successfully synthesized on Ni foam (NF) by a two-step hydrothermal process and subsequent alkalization treatment. To investigate the influence of reaction time in the secondary hydrothermal process, three different hydrothermal times (4 h, 6 h, 8 h) were set. The results showed that the electrode had the highest specific capacitance of 2260 F·g −1 at 1 A·g −1 at the hydrothermal reaction time of 6 h, (4 h: 1807.8 F·g −1 , 8 h: 1358.3 F·g −1 ). In addition, it exhibited prominent rating capability and cycling stability, with 41.7% retention at 10 A·g −1 and 137.9% retention after 5000 cycles at 50 mV⋅s −1 . Finally, the assembled hybrid supercapacitor (HSC) with rGO/Ni(OH) 2 /Ni 3 S 2 /NF (6 h) and active carbon displayed outstanding electrochemical performance. When the power density was 400.5 W⋅kg −1 , it showed the energy density (25.2 Wh⋅kg −1 ), proving its potential as electrode materials for HSC devices.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2024
·
IF 5.8
Maoyuan Li,Zhongrui Yu,Zulin Sun,Yuchen Liu,Simiao Sha,Jiancheng Li,Riyue Ge,Liming Dai,Bin Liu,Qingqiao Fu,Wenxian Li
Electrocatalyst materials play a crucial role in determining the efficiency of the hydrogen evolution reaction (HER), directly influencing the overall effectiveness of energy conversion technologies. Ni3S2/MoS2 heterostructures hold substantial promise as bifunctional catalysts, owing to their synergistic electronic characteristics and plentiful active sites. However, their catalytic efficacy is impeded by the relatively elevated chemisorption energy of hydrogen-containing intermediates, which constrains their functionality in different pH environments. In order to mitigate this limitation, trace amounts of Pt are introduced into the heterostructure, intending to enhance electronic transport and refining chemisorption energies, thereby facilitating significant enhancements in both HER and oxygen evolution reaction (OER) activities over a wide pH range. It is revealed that the Pt-modified catalyst achieves exceptional HER performance, requiring merely 64 mV and 83 mV overpotentials to attain a current density of 100 mA cm−2 in acidic and alkaline media, respectively. Furthermore, theoretical simulations corroborate that Pt modification optimizes local electronic configurations and augments electronic transfer, contributing to its superior catalytic performance. This investigation underscores the pivotal role of Pt modification in propelling the practical application of Ni3S2/MoS2 heterostructures as highly efficient and pH-universal bifunctional catalysts.
研究领域:
材料科学
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电化学
·
能源转换技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Hui Liu,Jianing Cheng,Wenjun He,Ying Li,Jing Mao,Xuerong Zheng,Cong Chen,Chunxiang Cui,Qiuyan Hao
Rationally design and exploration of bifunctional electrocatalysts with excellent performance towards water splitting is significant for hydrogen energy economy. Herein, a novel Au/Ni 3 S 2 heterostructure catalyst that was composed of self-supported Ni 3 S 2 nanosheets decorated with Au nanoparticles on Ni foam was fabricated. The bifunctional catalyst exhibited excellent catalytic activities towards oxygen evolution reaction (230 mV @ 10 mA cm −2 ) and hydrogen evolution reaction (97 mV @ 10 mA cm −2 ) in 1 M KOH. The electrolytic tank using the bifunctional catalyst only required 1.52 V to deliver 10 mA cm −2 and sustained for 60 h, outperforming most of advanced bifunctional catalysts. The X-ray absorption fine structure (XAFS) and density functional theory (DFT) calculations validated that the strong electronic coupling at the interface could modulate the electronic structure of Ni 3 S 2 , thereby optimizing the free energies of the adsorbed intermediates. This work provides an atomic-scale insight into the structure-properties relation of a promising heterostructure catalyst for water splitting.
研究领域:
材料科学
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电化学
·
理论计算
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Xueping Yu,Beibei Gao,Biao Feng,Yage Peng,Xiaoyong Jin,Gang Ni,Juan Peng,Min Yao
Modular electrochemical production (MEP) system could decouple the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), and pairing with a redox mediator (RM), respectively. Herein, Mott–Schottky Co 9 S 8 /Ni 3 S 2 heterojunction was constructed, which was employed as a RM to separate the hydrogen and oxygen production in space and time in MEP system for H 2 . The MEP system for H 2 involved a two−step electrochemical−electrochemical (EC−EC) looping process. The reversible redox reaction of Co 9 S 8 /Ni 3 S 2 was paired with HER in step 1 and subsequently paired with OER in step 2. The Mott–Schottky hetero-structures enabled the redistribution of Ni central charge and accelerated the electron transfer from semiconductor Ni 3 S 2 to metallic Co 9 S 8 on the interface. This made the formation of Lewis acid at the Ni 3 S 2 in the heterojunction , which bonded with the OH − Lewis base, facilitating the electrochemical redox kinetics of Co 9 S 8 /Ni 3 S 2 . Thus, the Co 9 S 8 /Ni 3 S 2 RM presented a high area capacitance (29.60 F/cm 2 at 5 mA/cm 2 ), and an excellent stability upon operation over 5000 cycles (15 days). The MEP system can continuously produce H 2 for 1502 s at 10 mA/cm 2 with a Faradaic efficiency of 100%. The MEP system possessed a high energy efficiency (83%), requiring a lower cell voltage than that of a conventional water electrolysis system. The MEP system for H 2 enabled flexible utilization of renewable solar energy by photovoltaic (PV) panels, thereby facilitating solar-to-hydrogen conversion.
研究领域:
能源科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Zengcai Guo,Jianpeng Mu,Junpeng Wang,Jingbo Mu,Hongwei Che,Feng Li,Hang Yang,Lixin He,Fangfang Wei
How to design and synthesize of advanced MOF-based electrode materials for high-performance supercapacitors is still a huge challenge, herein, CoNi-MOF@Ni 3 S 2 and ZIF-67/Ni 3 S 2 with unique heterostructures are rationally designed and constructed. The composite electrode materials not only make up for the poor conductivity of MOF, but also improve the structural stability of Ni 3 S 2 . As expected, the optimized ZIF-67/Ni 3 S 2 and CoNi-MOF@Ni 3 S 2 electrode demonstrates a remarkably enhanced specific capacitance of 1017.13 F g −1 and 1930.04 F g −1 at 1 A g −1 , respectively, which are higher than those of their respective monomeric components. Finally, ZIF-67/Ni 3 S 2 //AC and CoNi-MOF@Ni 3 S 2 //AC devices were assembled, which delivered an impressive energy density of 94.49 and 125.34 Wh kg −1 , along with the corresponding power density of 966.34 W kg −1 971.86 W kg −1 , respectively. Moreover, by comparison, the CoNi-MOF@Ni 3 S 2 electrode material exhibits better supercapacitor performance than ZIF-67/Ni 3 S 2 . This effective protective strategy provides an alternative way for constructing MOF or sulfide electrodes with remarkably improved energy storage performance.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2016
·
IF 6.333
Xin Ao,Zhaoyin Wen,Yingying Hu,Tian Wu,Xiangwei Wu,Qiming He
Nickel particles with different contents of Ni 3 S 2 surface layer were prepared for their application as cathode materials in Na/NiCl 2 batteries . The surface modification of nickel particles is found to prevent their growth and battery degradation during cycling. The optimum level of surface modification was determined by electrochemical tests and morphology characterization. Excessive Ni 3 S 2 layer seems to cause particle aggregation resulting in low reversible capacity. The capacity of the cell with optimum level of Ni 3 S 2 surface modification layer after 50 cycles is about 4 times greater than that without Ni 3 S 2 surface modification layer.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Sustainable Energy & Fuels
·
2025
·
IF 4.1
Jiale Shang,Tong Wei,Xiaoqing Yan,Zheng Fang,Leilei Du,Jichao Shi,Fozia Sultana,Tongtong Li,Renhong Li
Urea-assisted water splitting represents a prospective approach for sustainable hydrogen (H2) production. However, the challenge of designing highly efficient, durable, and economically viable bifunctional electrocatalysts hampers the practical implementation of this technology. In this work, we design a Ni3S2-CeO2 heterostructure catalyst on nickel foam, tailored to upgrade the efficiency and cost-effectiveness of urea-assisted electrolysis. The catalyst features a unique interconnected nanosheet architecture, which boosts its activity, obtaining 100 mA cm−2 for the urea oxidation reaction (UOR) with an overpotential of just 146 mV, and only 56 mV at 10 mA cm−2 for the hydrogen evolution reaction (HER). When employed at both electrodes in a urea electrolysis electrolyzer, the Ni3S2-CeO2/NF catalyst reaches a high current density of 500 mA cm−2 at 1.734 V. Experimental results and DFT calculations demonstrate that the Ni3S2-CeO2/NF heterogeneous interface facilitates electron redistribution and increases electronic density at Fermi level, thereby enhancing the conductivity. The incorporation of CeO2 facilitates the Ni3S2 surface reconstruction, forming NiOOH active species with abundant oxygen vacancies (OV) that optimize urea adsorption and improve UOR kinetics. Additionally, CeO2 reduces the hydrogen adsorption energy (ΔGH*), accelerating the HER process. These synergistic effects endow the Ni3S2-CeO2/NF catalyst to achieve outstanding bifunctional activity in UOR and HER, underscoring its potential for efficient urea-assisted electrolysis with low overpotentials at high current densities. This investigation supplies guidance for creating effective bifunctional catalysts for sustainable hydrogen production.
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
ACS Applied Nano Materials
·
2023
·
IF 5.9
Taiyu Chen,Qikang Wu,Feng Li,Rui Zhong,Zheng Chen
In order to realize efficient hydrogen production with low energy consumption, the urea oxidation reaction (UOR) is used as a substitute for the oxygen evolution reaction (OER) to reduce the thermodynamic potential of water electrolysis. Highly efficient and stable nonprecious metal electrocatalysts are desired to resolve the slow kinetics resulted from the six-electron transfer process inherent in UOR. Here, the heterostructured nanocrystals of Co2P–Ni3S2 were constructed through deposition of Ni salt on acetylene black coated with CoP species (Co2P–Ni3S2/C) and subsequent vulcanization. Compared with single component CoP/C and Ni3S2/C, the Co2P–Ni3S2/C with optimal ratio of Co2P and Ni3S2 shows lower potential (1.338 V) to reach 10 mA·cm–2, which also realizes good long-term stability for nearly 100 h in chronoamperometry test. The X-ray photoelectron spectroscopy and UOR results together revealed that Ni3+ is the main site to form active intermediates, which is formed by the electron transfer from Ni3S2 to Co2P through a heterostructured interface. Inspired by the excellent UOR activity of Co2P–Ni3S2/C, as an anode in electrolyte for hydrogen evolution through urea-assisted water splitting, the current density of 10 mA·cm–2 can be achieved at a potential of only 1.389 V. Therefore, the construction of two component heterostructure is conducive to electron transfer and active site regulation, so as to realize the development of effective UOR catalyst and promote the UOR application for energy-saving hydrogen production.
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
危险品化学品经营许可证（带存储）