Journal of Environmental Sciences
·
2024
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IF 5.9
Yunjin Yao,Zhongming Tao,Hongwei Hu,Lijie Zhang,Ziwei Ma,Yaoyao Wang,Shiyang Lin,Shaobin Wang
Catalytic oxidation of organic pollutants is a well-known and effective technique for pollutant abatement. Unfortunately, this method is significantly hindered in practical applications by the low efficiency and difficult recovery of the catalysts in a powdery form. Herein, a three-dimensional (3D) framework of Fe-incorporated Ni 3 S 2 nanosheets in-situ grown on Ni foam (Fe-Ni 3 S 2 @NF) was fabricated by a facile two-step hydrothermal process and applied to trigger peroxymonosulfate (PMS) oxidation of organic compounds in water. A homogeneous growth environment enabled the uniform and scalable growth of Fe-Ni 3 S 2 nanosheets on the Ni foam. Fe-Ni 3 S 2 @NF possessed outstanding activity and durability in activating PMS, as it effectively facilitated electron transfer from organic pollutants to PMS. Fe-Ni 3 S 2 @NF initially supplied electrons to PMS, causing the catalyst to undergo oxidation, and subsequently accepted electrons from organic compounds, returning to its initial state. The introduction of Fe into the Ni 3 S 2 lattice enhanced electrical conductivity, promoting mediated electron transfer between PMS and organic compounds. The 3D conductive Ni foam provided an ideal platform for the nucleation and growth of Fe-Ni 3 S 2 , accelerating pollutant abatement due to its porous structure and high conductivity. Furthermore, its monolithic nature simplified the catalyst recycling process. A continuous flow packed-bed reactor by encapsulating Fe-Ni 3 S 2 @NF catalyst achieved complete pollutant abatement with continuous operation for 240 h, highlighting its immense potential for practical environmental remediation. This study presents a facile synthesis method for creating a novel type of monolithic catalyst with high activity and durability for decontamination through Fenton-like processes.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Jiefei Ding,Tong Xia,Qing Xia,Guanglong Li,Yingdong Qu
Reasonably constructed complex electrode materials are crucial for enhancing the performance of supercapacitors. In this work, polypyrrole (PPy)-modified Ni3S2 nanosheet electrodes are obtained by a hydrothermal approach and a subsequent electrodeposition method. In addition, a composite electrode can shorten the ion diffusion path and enhance its conductivity. The optimal product delivers a capacity of 1484 C g–1 at 1 A g–1 and high cycling stability. In addition, the assembled hybrid supercapacitor achieves an energy density of 74.9 W h kg–1 at 1356.4 W kg–1 and a capacity of 91.7% after 10 000 cycles. Also, the device shows excellent mechanical stability under different bending angles.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
Nano Research
·
2023
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IF 9.9
Yue Meng,He Xun,Sun Shengjun,Sun Yuntong,Hamdy Mohamed S.,Benaissa Mhamed,Salih Alsamani A. M.,Liu Jun,Sun Xuping
Developing efficient and durable oxygen evolution reaction (OER) catalysts holds great promise for green hydrogen production via seawater electrolysis, but remains a challenge. Herein, we report a Co-doped Ni 3 S 2 nanosheet array on Ni foam (Co-Ni 3 S 2 /NF) as a high-efficiency OER electrocatalyst for seawater. In alkaline conditions, Co-Ni 3 S 2 /NF requires an overpotential of only 368 mV to drive 100 mA·cm −2 , superior to Ni 3 S 2 /NF (385 mV). Besides, it exhibits at least 50-h continuous electrolysis.
研究领域:
材料科学
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电化学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2020
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IF 4.473
Yapeng He,Panpan Zhang,Hui Huang,Xiaobo Li,Xinhua Zhai,Buming Chen,Zhongcheng Guo
The development of an efficient metal sulfide cathode is of great importance and an ongoing challenge for the practical application of an aqueous rechargeable Ni-Zn battery. Herein, Ni3S2 nanosheets with abundant sulfur vacancies (r-Ni3S2) have been successfully prepared via hydrothermal reaction and surface engineering, which are further employed as the binder-free cathode of the aqueous Ni-Zn battery. Benefitting from the features of substantially improved electrical conductivity, low band gap, abundant active sites, and good intrinsic capacity, the r-Ni3S2 electrode delivers an impressive reversible specific capacitance (1621.6 F g–1 at 0.2 A g–1) and extraordinary rate capability (62.1% retention under 8 A g–1). Moreover, the aqueous rechargeable r-Ni3S2//Zn battery exhibits a remarkable specific capacity (240.8 mAh g–1 at 1 A g–1) and preeminent cycling durability (only 8.4% decay after 3000 cycles). Besides, a glorious energy density of 419.6 Wh kg–1 together with a peak power density of 1.84 kW kg–1 could be achieved, surpassing a significant percentage of the reported Ni-Zn batteries. The results reveal that the r-Ni3S2 cathode with abundant sulfur vacancies and the adopted facile approach possesses huge promotion potential for Ni-Zn batteries and is promising to numerous electronics and electric vehicle applications in the future.
研究领域:
材料科学
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能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2021
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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
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理论计算
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2022
·Vol. 18
·期 43
·2106904
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IF 15.153
Zhong Wu,Yanhui Feng,Zhenbo Qin,Xiaopeng Han,Xuerong Zheng,Yida Deng,Wenbin Hu
Development of efficient non-noble metal catalysts for water splitting is of great significance but challenging due to the sluggish kinetics of the hydrogen evolution reaction (HER) in alkaline medium. Herein, a bimetallic multi-level layered catalytic electrode composed of Ni 3 S 2 nanosheets with secondary Co-NiOOH layer of 3D porous and free-standing cathode in alkaline medium is reported. This integrated synergistic catalytic electrode exhibits excellent HER electrocatalytic performance. The resultant Ni 0.67 Co 0.33 /Ni 3 S 2 @NF electrode displays the highest HER activity with only overpotentials of 87 and 203 mV to afford current densities of 10 and 100 mA·cm −2 , respectively, and its Tafel slope is 80 mV·dec −1 . The chronopotentiometry operated at high current density of 50 mA·cm −2 shows negligible deterioration, indicating better stability of Ni 0.67 Co 0.33 /Ni 3 S 2 @NF electrode than Pt/C (20 wt.%). Such a desirable catalytic performance is attributed to the modification of physical and electronic structure that exposes abundant active sites and improves the intrinsic catalytic activity toward HER, which is also confirmed by electrochemically active surface area and X-ray photoelectron spectroscopy analysis. This work provides a strong support for the rational design of high-performance bimetallic electrodes for industrial water splitting.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2021
·Vol. 32
·期 12
·16866-16880
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IF 2.478
Chen Han Xiang,Gui Yang
We report a template method by rationally designing a self-supported Ni 3 S 2 nanosheet-wrapped ZnO nanorod (Ni 3 S 2 @ZnO) standing vertically on Ni foam surface. In this work, an organic molecule of 2-methylimidazole (2-MI) using as a structural director, which is commonly used in metal–organic frameworks(MOFs), has been adopted to link those Ni 3 S 2 nanosheets forming a shear-wall structure. This special morphology with multi-dimension (2D with 1D) exhibits advantages on the high capacitance of about 3546 F g −1 at a current density of 0.5 A g −1 . Besides this, Ni 3 S 2 @ZnO can deliver an extraordinarily capacitance of 1872 F g −1 even at a high current density of 25 A·g −1 , which in the meantime displayed a good capacity retention of 70.3% after 10,000 cycles. An asymmetric supercapacitor was then constructed, performing a quite stable capacitance of about 197 F g −1 at a high current density of 15 A g −1 for 5000 cycles and a sufficient energy density of 140 Wh kg −1 , which proves its potential on lighting up six red LEDs in practical usage.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Yaohui Gao,Wenjun He,Da Cao,Fangqing Wang,Ying Li,Qiuyan Hao,Caichi Liu,Hui Liu
Designing effective and low-cost bifunctional electrocatalysts for the alkaline hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is essential to achieve green development of the hydrogen economy. Herein, we have developed Mo-doped Ni3S2 nanosheet array catalysts with excellent electrochemical properties. Only 85 mV (HER) and 230 mV (OER) overpotentials are required under alkaline conditions at 10 mA cm–2 and remain undegraded for 100 h. In addition, it only required 1.52 V at 10 mA cm–2 in an alkaline electrolyzer, and it remained unchanged for more than 100 h in stability tests, outperforming most reported electrocatalysts. Experiments and density functional theory (DFT) calculations confirmed that the doping of Mo could expose more active sites of Ni3S2 and optimize the adsorption free energy of the intermediate, which in turn improves its intrinsic activity. This work reveals the key role of Mo in Ni3S2 electrocatalytic performance enhancement at the atomic scale.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
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IF 8.3
Shengming Liu,Yu Gu,Jia Kang,Jiaomei Zhang,Siyuan Liu,Huan Yang,Xinghua Zhu,Mei Ming
Replacing the sluggish anodic oxygen evolution reaction (OER) with the sulfide oxidation reaction (SOR), which possess a low thermodynamic oxidation potential, is an effective strategy to lower the energy consumption of the cathodic hydrogen evolution reaction (HER) while enabling the resource recovery of sulfide pollutants. However, enhancing the catalytic activity and stability of electrocatalysts for both the HER and SOR in sulfide-containing solutions remains a significant challenge. In this work, a nanoflower-like V-doped Ni 3 S 2 catalyst grown on nickel foam (V–Ni 3 S 2 /NF) was synthesized via a one-step hydrothermal method. Experimental results confirm that V doping effectively modulates the electronic structure of Ni 3 S 2 , thereby enhancing its intrinsic catalytic activity. As a consequence, the V–Ni 3 S 2 /NF-2 catalyst delivers an exceptionally low SOR overpotential of 0.283 V at a current density of 10 mA cm −2 , together with excellent long-term stability. In-situ Raman analysis unveils a stepwise sulfide oxidation pathway, where S 2− species are initially converted to short-chain polysulfides and subsequently oxidized to S 8 . Moreover, the electrode exhibits outstanding bifunctional characteristics toward HER and SOR, requiring only 0.442 V to simultaneously achieve hydrogen evolution and sulfide removal at 10 mA cm −2 , which is substantially lower than the energy required for overall water splitting (1.56 V). Prepared through a straightforward binder-free and noble-metal-free strategy, the V–Ni 3 S 2 /NF-2 catalyst combines low cost with potential practical applicability, presenting a promising approach for concurrent hydrogen production and sulfide valorization.
研究领域:
电催化
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环境修复
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能源材料
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无机化学
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可持续化学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2023
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IF 3.9
Jie Ying,Zhen-Zhao He,Jiang-Bo Chen,Yu-Xuan Xiao,Xiao-Yu Yang
Many attempts have been made to enhance the relatively poor electrochemical activity of Ni3S2 for the oxygen evolution reaction (OER) by elevating the d-band center. Unfortunately, only limited success has been encountered thus far. Owning to the lower electronegativity and one less 3d electron relative to Ni, Fe shows great potentials in upshifting the overall d-band center of Ni3S2 when incorporating into its crystal structures. Herein, to enhance the intrinsic activity by elevating the d-band center, Ni3S2 nanosheets incorporated with suitable Fe content have been fabricated by a facile one-step solvothermal method. The obtained Fe-incorporated Ni3S2 catalyst exhibits an outstanding OER performance in alkaline media, only requiring 244 mV overpotential (with a reduction of 210 mV compared to Ni3S2) at 50 mA cm–2 in 1 M KOH and without obvious degradation after sustaining for a 60 h test at a voltage above 1.5 V. Ultraviolet photoemission spectroscopy and density functional theory calculations consistently demonstrate that the superior performance of Fe-incorporated Ni3S2 is attributed to the upshift of the d-band center on neutralizing the electron densities of Ni, which optimize greatly the adsorption energy of the intermediate (OOH*) in the rate-determining Volmer step.
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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能源材料
✓ 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）