JOURNAL OF POWER SOURCES
·
2013
·
IF 4.675
Zhicai Xing,Qingxin Chu,Xinbang Ren,Chenjiao Ge,Abdullah H. Qusti,Abdullah M. Asiri,Abdulrahman O. Al-Youbi,Xuping Sun
In this communication, for the first time, we demonstrate the electrodeposition of Ni 3 S 2 on ZnO (ZnO@Ni 3 S 2 ) array supported on nickel foam. We further demonstrate the direct use of ZnO@Ni 3 S 2 array as a binder-free electrode material for supercapacitors and this electrode exhibits a very high specific capacitance of 1529 F g −1 at a current density of 2 A g −1 , good rate capability and cycling stability.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2020
·Vol. 12
·期 37
·19333-19339
·
IF 6.895
Caichi Liu,Fangqing Wang,Dongbo Jia,Jingqian Zhang,Jingyu Zhang,Qiuyan Hao,Jun Zhang,Ying Li,Hui Liu
Exploring Earth-abundant transition-metal-based electrocatalysts with high performance toward the alkaline hydrogen evolution reaction (HER) is crucial for sustainable hydrogen production. Ni3S2 has been recently identified as a promising HER catalyst, but it has unfavorable water dissociation and hydrogen adsorption characteristics. Here, we report Ag-decorated Ni3S2 nanosheet arrays grown on Ni Foam (NF) (Ag-Ni3S2/NF) as efficient heterostructure electrocatalysts for the HER in alkaline media. The catalyst only requires a low overpotential of 89 mV at 10 mA cm−2, as well as sustaining long-term durability for 15 h. The experimental analysis, in combination with density functional theory calculation, demonstrates that the electronic coupling at the interface between Ni3S2 and Ag results in enhanced electronic conductivity and optimized hydrogen adsorption and water adsorption/dissociation free energies. This work not only develops a highly efficient catalyst toward the HER, but also sheds light on the structure–activity relationship of the heterostructure catalyst on an atomic scale.
研究领域:
材料科学
·
电化学
·
催化
·
可再生能源
✓ 已验证
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
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Yating Fan,Weidong Shi,Longhua Li
In electrochemical decomposition of water, the slow kinetics of the anodic oxygen evolution reaction (OER) is a challenge for efficient hydrogen production. Heterointerface engineering is a desirable way to rationally design electrocatalysts for the OER. Herein, we designed and fabricated a nanoparticle flower-like NiCoFe(oxy)hydroxide catalyst in situ grown on the surface of Ni3S2/NF to construct a heterojunction via combining hydrothermal and electrodeposition methods. The heterostructure exhibits a smaller overpotential of 254 mV at a large current density of 100 mA cm–2 in 1 M KOH than that of pristine NiCoFeOxHy/NF (356 mV) and Ni3S2/NF (471 mV). Tafel and electrochemical impedance spectroscopy further showed a favorable kinetics during electrolysis. The role of the substrate Ni3S2 was explored via density functional theory calculations. Our calculations found that SOx on the Ni3S2 surface is a strong nucleophilic group and the synergy effect between Fe and SOx could break *OOH to reduce the Gibbs energy. We also found that the contribution of SOx in sulfates to the OER activity could be negligible. Furthermore, a series of comparative samples were prepared to test this synergy effect. Our experiments indicated that the introduction of Ni3S2 is beneficial. The present contribution provides an important helpful insight into the design and fabrication of novel and highly efficient heterostructure electrocatalysts by introducing nucleophilic groups at the interface.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 33
·15963-15974
·
IF 3.553
Wu Yanyan,Li Ying,Lü Zhe,Xu Lingling,Wei Bo
Developing efficient and durable oxygen evolution reaction (OER) electrocatalysts with non-noble elements is particularly urgent for electrochemical water splitting. Herein, we report heterostructural Ni 3 S 2 –Fe 5 Ni 4 S 8 hybrids directly grown on redox-NiFe foams (denoted as NFS/rNF) as excellent pre-catalysts for OER in 1 M KOH media. The electrochemical performance can be tuned by amount of sulfur source, and the optimized electrode only needs low overpotentials of 199 mV and 240 mV to attain 10 mA cm −2 and 100 mA cm −2 , respectively. Moreover, the overpotential is further reduced to 231 mV to deliver 100 mA cm −2 after multi-cyclic voltammogram scans, due to the exposure of abundant in situ generated Ni(Fe)OOH species. Excellent stability with continuous 40 h operation is also demonstrated. Our study provides a new strategy for direct synthesis of self-standing integrated hybrid electrodes for efficient and durable water oxidation.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Nan Zhang,Shanshan Huang,Lu Chen,Yue Li,Min Tang,Qunyue Pei,Jian Liu
It is important to develop electrocatalysts that are cheap and have high activity for hydrogen evolution reaction (HER). In this work, Ni 3 S 2 /NiMoS with amorphous phase and unique candied-haws shaped nanoarray structure was successfully grown on nickel foam (Ni 3 S 2 /NiMoS/NF) as efficient HER catalyst. Combining Ni 3 S 2 with NiMoS resulted in the extension of the heterointerfaces between the materials, which facilitated the HER process in alkaline medium. The amorphous Ni 3 S 2 /NiMoS with disordered atom arrangement provided abundant active sites. Also, the unique morphology of the catalytic electrode simultaneously enabled it exhibit superhydrophilicity and underwater superaerophobicity. It is beneficial for the sufficient diffusion of the electrolyte onto the catalyst surface and the fast departure of hydrogen bubbles from the surface. As a result, the activity of Ni 3 S 2 /NiMoS/NF was higher than that of Pt/C even at high current densities. It is very valuable for industrial applications that require high current density. The superior stability of Ni 3 S 2 /NiMoS/NF compared to Pt/C further demonstrated that this catalytic electrode has potential for industrial applications.
研究领域:
材料科学
·
电化学
·
可再生能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Batteries-Basel
·
2024
·Vol. 10
·期 7
·230
·
IF 4.6
Qi He,Xiang Wu
Ni3S2is a kind of transition metal sulfide (TMD) with excellent electrical conductivity and electrochemical activity. To further enhance the specific capacity of Ni3S2-based supercapacitors, we synthesize several nanosheet-decorated Ni3S2@NiMo-LDH nanostructures by a combination of hydrothermal and electrodeposition processes. The mesoporous structure provides a large number of electroactive sites, which shortens the charge transfer distance and increases the specific surface area of electrode materials. The assembled asymmetric supercapacitor shows an energy density of 62.8 W h kg−1at 2701.6 W kg−1and long-term cycling stability.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Na Wu,Xiaoqiang Du
One of the most attractive means for mitigation of environmental pollution is to produce hydrogen by electrocatalytic urea splitting. In the paper, the heterogeneous interfacial rich N–CuCo 2 S 4 @Ni 3 S 2 material was in situ synthesized on nickel foam through a typical hydrothermal and sulfuration process. This N–CuCo 2 S 4 @Ni 3 S 2 electrode displays excellent urea oxidation performance (potential of 1.38 V@50 mA cm −2 ), which is one of the best reactivity reported so far. Experimental results show that the superior catalytic activity is attributed to the rapid charge transfer, more reaction center exposed and superior electrical conductivity . Density functional theory shows that this Ni 3 S 2 material accelerates the reaction rate in the catalytic process, the introduction of this N–CuCo 2 S 4 material improves the conductivity of the material, and the synergistic catalysis of the N–CuCo 2 S 4 and Ni 3 S 2 makes this N–CuCo 2 S 4 @Ni 3 S 2 material exhibit superior urea oxidation activity. Notably, long-term tests have shown a decrease in catalytic activity, which suggests that the surface of the sulfide is in situ generated to oxides or hydroxides, which are truly active species. This work provides a new idea for the development of efficient and stable urea oxidation catalysts for sulfides.
研究领域:
材料科学
·
环境科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 24
·6018
·
IF 4.2
Qianqian Dong,Qijun Zhong,Jie Zhou,Yuhao Li,Yujing Wang,Jiayang Cai,Shuangwei Yu,Xiong He,Shaohui Zhang
The oxygen evolution reaction (OER), which involves a four-electron transfer and slow kinetics, requires an efficient catalyst to overcome the high energy barrier for high-performance water electrolysis. In this paper, a novel Ni3S2@V-NiFe(III) LDH/NF catalyst was prepared via a facile two-step hydrothermal method. The constructed heterostructure of Ni3S2@V-NiFe(III) LDH increases the specific surface area and regulates the electronic structure. Furthermore, the introduction of the V element forms an electron transport chain of Ni-O-Fe-O-V-O-Ni, which optimizes the binding energy between metal active sites and oxygen evolution reaction intermediates, accelerates electron transfer, and improves self-reconstruction. With this dual regulation strategy, Ni3S2@V-NiFe(III) LDH/NF exhibits exceptional OER performance with an overpotential of 280 mV at 100 mA/cm2and a Tafel slope of 45.4 mV/dec. This work develops a dual regulation strategy combining heterostructure formation and the doping effect, which are beneficial in the design of efficient OER catalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CATALYSIS
·
2019
·
IF 7.723
Hongye Qin,Biao Zhang,Yaping Pan,Xixi Wang,Lechen Diao,Jiao Chen,Jinli Wu,Enzuo Liu,Junwei Sha,Liying Ma,Naiqin Zhao
Developing efficient and low-cost electrocatalysts for hydrogen evolution reaction (HER) is important in clean energy systems. Non-noble transition metals are the most promising candidates for the replacement of conventional Pt group catalysts of HER . However, most non-noble metals show poor HER activity due to the intrinsic electronic structures. Herein, P atoms doped Ni 3 S 2 (P-doped Ni 3 S 2 ) nanosheets array grown on Ni foam has been successfully synthesized and further applied as the efficient electrocatalysts for HER in alkaline media. P-doped Ni 3 S 2 shows higher catalytic activity for HER compared with pristine Ni 3 S 2 , which affords the current densities of 10 mA cm −2 at an overpotential of 139 mV and long-term stability over 110 h. Density functional theory (DFT) calculations reveal that the introduction of P atoms modify the electronic structure of Ni 3 S 2 , enhance the electrical conductivity, optimize the HER Gibbs free-energy (Δ G H* ) and the change of water adsorption energy (Δ G H2O* ), and reduce the barrier of water dissociation optimize the HER Gibbs free-energy (Δ G H* ), change water adsorption energy (Δ G H2O * ) and reduce the barrier of water dissociation. Remarkably, energy integral of a crystal orbital Hamilton population (ICOHP) gives access to the contribution of an atom or a chemical bond to the distribution of one-particle bonding within the transistion state of water dissociation and reveals the reduced essence of water dissociation barrier.
研究领域:
材料科学
·
电催化
·
理论计算
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
·
2024
·
IF 5.9
Maomao Liu,Guizeng Liang,Ningce Zhang,Tao Li,Lipeng Diao,Ping Lu,Xiaoliang Zhao,Daohao Li,Dongjiang Yang
Rationally constructed new catalyst can promote carbon dioxide reduction reaction (CO 2 RR) to valuable carbonaceous fuels such as formate and CO, providing a promising strategy for low CO 2 emissions. Herein, the synthesized Ni 3 S 2 @C as a highly efficient electro-catalyst exhibits remarkable selectivity for formate with 73.9% faradaic efficiency (FE) at −0.7 V vs. RHE. At high applied potential, it shows a high syngas evolution with CO/H 2 ratios (0.54–3.15) that are suitable for typical downstream thermochemical reactions . The experimental and theoretical analyses demonstrate that the electron-rich Ni 2+ in Ni 3 S 2 enhances the adsorption behavior of ∗ OCHO intermediate, reduces the energy barrier of the formation of intermediates, and improves the selectivity of the formate product. Attenuated total reflection surface-enhanced infrared absorption spectra conducted in situ show that ∗ OCHO intermediate is more likely to be generated and adsorbed on Ni 3 S 2 , enhancing the selectivity and activity of the formate product.
研究领域:
电化学
·
催化材料
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2021
·Vol. 28
·期 2
·871-877
·
IF 2.817
Ding Jiefei,Li Guanglong,Qu Yingdong
Nanostructured Ni 3 S 2 is considered to be one of the most promising energy storage materials due to its high theoretical specific capacitance and excellent conductivity. In this work, we prepare dendritic Ni 3 S 2 nanosheet arrays by one-step solvothermal method. The as-prepared samples as binder-free electrode present a specific capacity of 863.55 C g −1 at 1 A g −1 . The assembled hybrid supercapacitor owns an energy density of 33.7 W h kg −1 at 1396.7 W kg −1 . Such excellent electrochemical performance can be ascribed to its unique structure and the direct contact between Ni 3 S 2 and Ni foam, which can ensure rapid ion and electron transfers during redox reactions.
研究领域:
材料科学
·
能源存储
✓ 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）