DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 12
·4853-4861
·
IF 4.569
Jie Bai,Tianning Zhou,Yihao Gao,Meilin Zhang,Xiaofei Jing,Yaqiong Gong
Due to the slow reaction kinetics of the oxygen evolution reaction (OER), the electrolysis rate of water is greatly limited. Therefore, it is of great significance to study stable and efficient non-noble metal based electrocatalysts. In this paper, three-dimensional (3D) spherical V-NiFe LDH@Ni3S2 was developed by exquisitely decorating ultra-thin V-doped NiFe layered dihydroxide (NiFe-LDH) on Ni3S2 nanosheets supported by nickel foam (NF). It is worth mentioning that V-NiFe LDH@Ni3S2 exhibits an excellent electrocatalytic performance and only 178 mV overpotential is required in 1 M KOH to achieve a current density of 10 mA cm−2. Long-term chronoamperometry manifests its superior electrochemical stability. The combination of NiFe LDH and conductive substrate coupling can drastically afford abundant active sites and accelerate charge transfer, and V doping can markedly regulate the electronic structure. Therefore, the activity and durability of the electrocatalysts are greatly improved. This study may provide a new strategy for the preparation of efficient OER electrocatalysts.
研究领域:
电化学
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材料科学
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催化
·
能源材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY & FUELS
·
2019
·
IF 3.021
Jingwei Li,Lijuan Jiang,Shuai He,Licheng Wei,Rongfu Zhou,Jinming Zhang,Dingsheng Yuan,San Ping Jiang
Development of efficient, stable, and robust bifunctional electrodes is important for the practical and industrial application of water electrolysis technologies for renewable hydrogen production. Here, we report the fabrication of heterostructured Ni(OH)2 nanosheets/Ni3S2 nanoneedles grown on Ni foam, Ni(OH)2/Ni3S2/NF, as a highly active and mechanically strong bifunctional electrode for overall water splitting. The results indicate that heterostructured Ni(OH)2/Ni3S2 interfaces are the reactive center for the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). The redistribution of electrons and formation of the Niδ+ and Sδ− active species serve as the hydroxyl and proton acceptors and significantly promote the transformation of intermediate species and charge transfer processes in both the OER and HER. The Ni(OH)2/Ni3S2/NF electrode shows overpotentials as low as 252, 279, and 319 mV to reach 30, 50, and 100 mA cm–2, respectively, for OER and 48, 79, and 185 mV to achieve 10, 20, and 100 mA cm–2, respectively, for HER in 1.0 M KOH solution. An alkaline electrolyzer assembled by bifunctional Ni(OH)2/Ni3S2/NF electrodes displays cell voltages of 1.80 V to deliver 100 mA cm–2 and is stable for over 100 h. This study demonstrates promising potential of the Ni(OH)2/Ni3S2/NF bifunctional electrode for advancing water-splitting technologies.
研究领域:
材料科学
·
电化学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Liming Ren,Chao Wang,Wen Li,Ruohao Dong,Hongxia Sun,Ning Liu,Baoyou Geng
Designing highly efficient bifunctional water splitting electrocatalyst is essential to ease the forthcoming energy crisis and the increasingly severe environmental problems. In this paper, NiFe-LDH@Ni 3 S 2 arrays on nickel foam (NF) are prepared via a facile two-step hydrothermal approach. The catalyst with a special structure of on-chip epitaxial growth of sheet grown vertically on nickel foam not only provides enhanced interface connections and massive exposed active sites but also accelerates the transmission of electronics. The experimental results demonstrate that Ni1Fe10-LDH@Ni 3 S 2 /NF possesses exceptional electrocatalytic performance for both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) compared to individual NiFe-LDH and Ni 3 S 2 . It demands 230 mV to drive a current density of 50 mA cm −2 toward OER while it just needs 197 mV to afford 20 mA cm −2 for HER. Additionally, Ni1Fe10-LDH@Ni 3 S 2 /NF as both cathode and anode in a two-electrode system just requires 1.65 V to reach 10 mA cm −2 and still remains stable after a 12 h chronoamperometry measures. The as-synthesized electrocatalyst with improved electrocatalytic performance, outstanding long-term stability and low-priced is prospective for overall water splitting practical production.
研究领域:
材料科学
·
电化学
·
能源材料
·
催化
✓ 已验证
产品关联
DOI
高影响因子
ChemSusChem
·
2025
·
IF 6.6
Yue Wang,Han Qin,Xiangming Wang,Feng Yan,Yang Zhao,Xianbo Yu
Graphical A hierarchical heterostructure consisting of amorphous FeNi(OH) X nanosheets electrodeposited on crystalline Ni 3 S 2 scaffolds with abundant catalytic active sites and superior electronic conductivity is reported to enhance its catalytic activity and long-term stability for overall water splitting. The advancement of inexpensive and productive bifunctional electrocatalysts for overall water splitting is essential for achieving hydrogen energy production. Herein, a hierarchical heterostructure catalyst composed of amorphous FeNi(OH) X nanosheets supported on a crystalline Ni 3 S 2 scaffold, which is anchored to nickel foam through a combined hydrothermal-electrodeposition strategy, is reported. The crystalline Ni 3 S 2 framework exhibits metal-like electrical conductivity and optimized hydrogen adsorption kinetics, while the amorphous FeNi(OH) X overlayer offers abundant adaptive active sites that enhance oxygen evolution reaction (OER) activity. The interfacial charge redistribution decreases the activation energy required for water splitting and accelerates the proton-coupled electron transfer process. Electrochemical tests demonstrate that the catalyst achieves performance at a current density of 10 mA cm −2 , with hydrogen evolution reaction (HER) and OER overpotentials as low as 78 and 183 mV, respectively. In addition, an alkaline electrolyzer assembled with this catalyst serving as both cathode and anode can sustain a current density of 10 mA cm −2 with only 1.51 V and keep a long-term stability exceeding 100 h, surpassing the performance of commercial Pt/C||IrO 2 systems. This study provides a design paradigm that integrates conductive crystalline frameworks with amorphous layers, addressing the tradeoff between conductivity and catalytic multifunctionality in nonprecious metal electrocatalysts.
研究领域:
电化学
·
催化
·
材料科学
·
能量转换
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Juan Jian,Long Yuan,Hui Qi,Xuejiao Sun,Le Zhang,He Li,Hongming Yuan,Shouhua Feng
Ni3S2 nanosheets doped with tin (Sn) grown on nickel foam (Sn–Ni3S2/NF) through a facile hydrothermal process were found to be superior water-splitting electrocatalysts. As for overall water splitting (OWS), when the current density is 10 mA cm–2, the required voltage is only 1.46 V. Meanwhile, it exhibits a large current density property and long-time stability (>60 h current–time tests) for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). In order to reach the current densities of 100 and 1000 mA cm–2, Sn–Ni3S2/NF needs overpotentials of 0.17 and 0.57 V for HER, and 0.27 and 0.58 V for OER, respectively. The water-splitting property of Sn–Ni3S2/NF is much better than that of pure Ni3S2/NF or even 20 wt % Pt/C/NF and RuO2/NF. Furthermore, Sn–Ni3S2/NF showed a higher turnover frequency at different potentials, with ∼100% Faraday efficiency for both O2 and H2. The improved activity of Sn–Ni3S2/NF activity for water-splitting is attributed to the doping of Sn, which enhanced the intrinsic activity of Sn–Ni3S2/NF for OWS. This article not only provides a new efficient and stable catalyst for OWS, but also proposes an interface design principle for NF-based high-performance water-splitting materials.
研究领域:
材料科学
·
电化学
·
催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
·
2022
·
IF 0.847
Xianbiao Hou,Tianyuan Jiang,Xiujuan Xu,Xingkun Wang,Jian Zhou,Huimin Xie,Zhicheng Liu,Lei Chu,Minghua Huang
ABSTRACT Developing highly efficient, easy-to-make and cost-effective bifunctional electrocatalysts for water splitting with lower cell voltages is crucial to producing massive hydrogen fuel. In response, the coupled hierarchical Ni/Fe-based MOF nanosheet arrays with embedded metal sulfide nanoclusters onto nickel foam skeleton (denoted as Fe-Ni 3 S 2 @NiFe-MOF/NF) are fabricated, in which the Fe-Ni 3 S 2 clusters could effectively restrain the aggregation of the layer metal-organic frameworks (MOF) nanosheets and adjust the local electronic structures of MOFs nanosheets. Benefiting from the rapid charge transfer and the exposure of abundant active sites, the well-designed Fe-Ni 3 S 2 @NiFe-MOF/NF displays excellent oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) performance. More importantly, when equipped in the alkaline water electrolyzer, the Fe-Ni 3 S 2 @NiFe-MOF/NF enables the system with a mere 1.6 V for achieving the current density of 10 mA cm −2 . This work offers a paradigm for designing efficient bifunctional HER/OER electrocatalysts based on the hybrid materials of nanostructured metal sulfide and MOF.
研究领域:
材料科学
·
电化学
·
能源材料
·
催化
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2023
·
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
·
材料科学
·
催化
·
能源材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Yijie Yang,Shun Yao,Ying Li,Yuanhang Wu,Chang Li,Congshu Hang,Hui Li
Development of efficient, low-cost, and bifunctional catalysts based on ultrathin heterostructures for both the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is critical for advancing overall water splitting. In this study, we design a simple intercalation-sulfidation strategy by rigid segment-containing Polysulfide as a sulfur source and in-situ intercalation for the construction of the metastable 1 T'-2H'-phase Mo-Ni 3 S 2 heterostructures (1 T'-2H'-Mo-Ni 3 S 2 ). It is found that the Polysulfides with rigid segments can be controlled by various monomers reacted with reverse sulfurization reactions between various monomers and elemental sulfur, such as Poly (sulfur-random-1,3-Benzenedithiol), Poly (sulfur-random-1,4-Benzenedithiol), and Poly (sulfur-random-4,4′-Biphenyldithiol), which can be used to assist in the synthesis process of metastable. Attributing to favorable synergy interaction in composition and structure, the resultant 1 T'-2H' phase Mo-Ni 3 S 2 heterostructures shows the superior performances toward OER and water splitting in alkaline medium. The resultant Mo-Ni 3 S 2 -BDP needs only an overpotential of 103 mV at a current density of 10 mA cm −2 and for OER. For HER, it demonstrates a low overpotential of 136 mV at 10 mA cm −2 , and a relatively low cell voltage of 1.672 V for water splitting. The present provides a new strategy to design and develop the phase engineering of other materials with various Polymorphs.
研究领域:
材料科学
·
电化学
·
催化
·
纳米技术
·
能量转换
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Conghan Zhang,Jiating Cheng,Fan Yang,Yang Sun,Xinyang Sun,Kexin Wei,Guang Ma,Junpu An,Meitong Zhao,Jiahui Liu,Yongfeng Li
Electrolytic water splitting using transition metal sulfide catalysts has garnered a lot of attention lately. Herein, a composite material consisting of Mo-doped Ni 3 S 2 nanoparticles supported on N-doped carbon layers with anchored Ni single atoms (Mo–Ni 3 S 2 /Ni–N–C) was synthesized using a two-step hydrothermal process. These features enable Mo–Ni 3 S 2 /Ni–N–C to achieve low overpotentials of 71, 58, and 89 mV for the hydrogen evolution reaction (HER) at 10 mA cm −2 in 1 M KOH, 0.5 M H 2 SO 4 , and 1 M PBS, respectively. After 20 h of durability testing, its current density retains over 95 % of the initial value across diverse pH electrolytes. Mo doping enhances structural stability, enabling wide pH applicability. Electron transfer from Ni 3 S 2 nanoparticles to Ni single atoms accelerates kinetics and boosts intrinsic activity, which improves HER performance. Theoretical calculations confirm that Ni single atoms possess ideal H∗ adsorption energy, which optimizes H∗ adsorption capability of Ni 3 S 2 . This work offers suggestions for creating excellent low-cost electrolytic water catalysts.
研究领域:
电化学
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催化
·
材料科学
·
纳米技术
·
能量转换
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Yongxuan Xiang,Wenji Li,Jiapeng Wang,Hongyue Tong,Xinmiao Li,Hua-Bin Yuan,Ziwei Wu,Guoqiang Chen,Tieling Xing
Metal–organic framework (MOF) materials have been extensively utilized in water electrolysis owing to their versatile chemical configurations and three-dimensional porous and exceptional surface areas characteristics. This study implemented an MOF-derived synthesis approach to develop a self-supporting electrocatalytic system. Initially depositing nanostructures on flexible carbon cloth through controlled growth, subsequent thermal treatment, and solution-phase sulfurization processes generated the Co3S4/Ni3S2@CC composite. The engineered material demonstrates hierarchical porosity and synergistic interfacial effects between components, facilitating numerous catalytic centers and optimized electron transport pathways. Strategic sulfur incorporation successfully tailors the electronic environment, substantially boosting the reaction kinetics. The integrated heterointerface electrode manifests superior dual-functional performance in alkaline freshwater electrolysis, demonstrating remarkably low overpotentials of 169 mV (HER) and 294 mV (OER), respectively, to attain a 10 mA cm–2 current density, while maintaining excellent durability under continuous operation. When operating in saline environments, the catalyst demonstrates remarkable catalytic activity, exhibiting overpotentials of 177 mV for the HER and 323 mV for the OER under identical current density conditions. Introducing ethanol or methanol into the electrolyte system significantly reduces the activation potential and lowers the overall energy requirements. These findings provide crucial guidance for developing advanced MOF-derived transition metal electrocatalysts optimized for efficient water splitting applications.
研究领域:
电化学
·
能源转换与存储
·
纳米材料
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催化
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可再生能源
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·Vol. 47
·期 33
·14916-14929
·
IF 7.139
Hongzhi Wang,Chunxiao Wang,Weiguo Zhang,Suwei Yao
Developing non-noble metal catalysts with excellent electrocatalytic performance and stability is of great significance to hydrogen production by water electrolysis, but there are still problems of low activity, complex preparation and high cost. Herein, we fabricated a novel Ni 3 S 2 /Ni(OH) 2 dual-functional electrocatalyst by a one-step fast electrodeposition on nickel foam (NF). While maintaining the electrocatalytic performance of Ni 3 S 2 , the existence of heterostructure and Ni(OH) 2 co-catalyst function greatly improves the overall water splitting performance of Ni 3 S 2 /Ni(OH) 2 –NF. Hence, It shows a low overpotential of 66 mV at 10 mA cm −2 for HER and 249 mV at 20 mA cm −2 for OER. The dual-functional electrocatalyst needs only 1.58 V at 20 mA cm −2 when assembled two-electrode electrolytic cell. Impressively, the electrocatalyst also shows outstanding catalytic stability for about 800 h when 20 and 50 mA cm −2 constant current was applied, respectively which demonstrates a potential electrocatalyst for overall water splitting.
研究领域:
材料科学
·
电化学
·
能源催化
·
纳米材料
·
可持续能源
·
功能材料
·
界面化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Mingxin Cai,Qinghua Ye,Ziru Wang,Peilei He
Electrochemical water splitting for hydrogen production is currently constrained by the sluggish kinetics of the anodic oxygen evolution reaction (OER). NiFe-based catalysts have emerged as promising alternatives to precious metal OER catalysts due to their low cost and relatively high electrocatalytic activity. However, NiFe-based catalysts prepared by conventional synthesis methods suffer from a low density of exposed active sites and ambiguous structures. Herein, we report a straightforward solution-thermal strategy for constructing two-dimensional sub-1 nm nanosheets (SNSs) through the self-assembly of an iron-substituted polyoxometalate (FeMo 6 ) cluster with Ni 3 S 2 . The Ni 3 S 2 –FeMo 6 SNSs exhibit excellent electrocatalytic performance in 1 M KOH, achieving an overpotential of only 342 mV at a current density of 100 mA cm −2 and maintaining stability for 100 h at 10 mA cm −2 . The synergistic effect between Fe and Ni 3 S 2 effectively modulates the electronic structure of the catalyst, accelerating the formation of the active NiOOH phase. Furthermore, Fe incorporation actively enhances hydroxyl groups adsorption on the catalyst surface and facilitates lattice oxygen participation in the reaction. This work clarifies the role of Fe in NiFe-based electrocatalysts, providing new perspectives for developing facile-to-synthesize and high-performance electrocatalysts.
研究领域:
电化学
·
纳米材料
·
催化
·
能量转换
·
材料科学
✓ 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）