JOURNAL OF ELECTRONIC MATERIALS
·
2024
·
IF 2.2
Hua Chengye,Zhu Yabo,Fan Heliang,Feng Peizhong
A good bifunctional electrocatalyst can effectively drive water splitting to produce hydrogen gas. In this paper, NiMoO 4an nanomaterial was prepared and combined with black phosphorus (BP) in a one-step method. Used as a bifunctional electrocatalyst, the composite demonstrated outstanding electrochemical performance with 162.7 mV and 137.6 mV achieving current densities of 20 mA cm −2 and 10 mA cm −2 for the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER), respectively. For overall water splitting, the potential was just 1.55 V to achieve 10 mA cm −2 , and, especially, the value only rises by0.05 V after 2000 cycles of CV. Here, the one-step synthesis method favors the dispersion of NiMoO 4 nanomaterial on the BP surfaces, and facilitates a combination between the nickel molybdate and the BP. Also, the excellent performance of the samples should benefit from the synergistic action between the components.
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 Energy Storage
·
2023
·
IF 9.4
Xin Xu,Shang Wu,Yang Liu,Chaoyang Liu,Xin Sun,Shuo Tian,Lan Wu,Yuzhi Sun,Zhichao Wang,Quanlu Yang
The tubular microsphere structure is an effective structure for asymmetric supercapacitors due to its high specific surface area and porosity. It can slow down the volume shrinkage caused by redox process. In this paper, tubular-like NiMoO 4 ·xH 2 O microspheres were designed to reach a high specific capacity. The NiMoO 4 ·xH 2 O was prepared by hydrothermal method and subsequent annealing treatment showed a tubular microsphere structure with many particles uniformly distributed. And its specific capacity is 943 F g −1 at 1 A·g −1 and capacity retention is 73.4 % after 3000 cycles. The Bi 2 S 3 /C was selected as negative material to build an asymmetric supercapacitor (battery-type device). It exhibited an impressive specific capacity (419 F g −1 at 1 A g −1 ). It was worth noting that the battery-type devices built with NiMoO 4 ·xH 2 O and Bi 2 S 3 /C can achieve a specific energy of 27.1 Wh kg −1 at 2456.9 W kg −1 and capacity retention of 69.2 % after 5000 cycles. It was shown that NiMoO 4 -xH 2 O and Bi 2 S 3 /C as electrode materials have great potential and can enhance the energy storage application of supercapacitors.
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
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Rui Xu,Jianming Lin,Jihuai Wu,Miaoliang Huang,Leqing Fan,Zedong Xu,Zeyu Song
Currently, although some progress has already been achieved, the complex and high-cost synthetic route, and low electrochemical properties of supercapacitor still restrict its practical application. Here, NiMoO 4 /NiO nanoflowers material with a high specific surface area grown on a nickel foam conductive substrate is successfully synthesized via a facile and efficient method, which exhibits an excellent capacitance of 10.3 F cm −2 (1982.3 F g −1 ), a good rate capability, and a remarkable cycling stability (capacity remain 98.6% after 3000 cycles). In addition, a novel asymmetric supercapacitor with excellent energy density is also fabricated via the NiMoO 4 /NiO nanoflowers as the positive electrode and a piece of active carbon as the negative electrode in 3 M KOH electrolyte. The optimized asymmetric device operating at 1.7 V also offers a high energy density and an outstanding long-term cycling stability. These impressive results suggest that such NiMoO 4 /NiO nanoflowers can pave the way for designing and developing next-generation high-performance storage systems.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Yunfeng Qiu,Xiaofan Dai,Yanping Wang,Xinyang Ji,Zhuo Ma,Shaoqin Liu
It is urgent to develop non-noble metal electrocatalysts with both excellent activity and durable stability for H 2 production via water electrolysis. Electric energy is mainly consumed by the sluggish anodic oxygen evolution reaction (OER). The electrocatalytic urea oxidation reaction (UOR) has been regarded as a promising reaction to replace OER because of its small thermodynamic oxidation potential . However, developing a facile and large-scale preparation method for bifunctional hydrogen evolution reaction (HER) and UOR electrocatalysts is still challenging. Herein, phosphate-modified (4.46 atomic%) NiMoO 4−x net-like nanostructures are formed on Ni foam (NF) via H 3 PMo 12 O 40 etching strategy at room temperature (denoted as NF/P-NiMoO 4−x ). The etched NF can directly serve as HER electrode , and delivers overpotential of 116 mV at current density of 10 mA/cm 2 with Tafel slope of 77.5 mV/dec. Furthermore, it displays excellent UOR activity with potential of 1.359 V at current density of 10 mA/cm 2 and Tafel slope of 19.3 mV/dec. The apparent activation energy of NF/P-NiMoO 4−x is 20.6 kJ/mol, lower than that of NF (37.7 kJ/mol), indicating smaller apparent barrier for C N bond cleavage in urea. The cell voltage of urea electrolysis is around 1.48 V for H 2 production to deliver current density of 10 mA/cm 2 , and better long-term stability for 50 h than that of Ir/C||Pt/C. The etching solution can be recycled for five times by addition of H 2 O 2 , turning heteropoly blue into its original state. This work develops a facile and large-scale method to prepare bifunctional HER and UOR electrocatalysts for H 2 production in a less-energy saving way via urea electrolysis.
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
Energy Technology
·
2018
·Vol. 7
·期 5
·1800940
·
IF 3.175
Maofeng Zhang,Wenzhen Liu,Ran Han,Jun Xu,Zhenjie Sun,Jiaqin Liu,Yucheng Wu
The synthesis of an efficient and economically viable supercapacitor material with a large areal capacitance for miniaturized consumer electronics is still a major challenge. Herein, densely packed 3D flower-like NiCo 2 O 4 @NiMoO 4 /reduced graphene oxide (rGO) composites on Ni foam which can be directly utilized as a supercapacitor material are demonstrated. The overall electrochemical performance can be significantly enhanced by an increase in the packing density of 3D flower-like structure, highly porous spatial construction, and the synergistic effects of the three materials, which generates a larger areal capacitance of 9.41 F cm −2 and a superior cycling stability with 75% areal capacitance retention after 2000 charge–discharge cycles. This simple and low-cost supercapacitor material may have potential applications in energy storage devices.
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
JOURNAL OF ELECTRONIC MATERIALS
·
2020
·Vol. 49
·期 6
·4010-4017
·
IF 1.774
Ji Fengzhen,Pan Xuexue,Qin Juhua,Chen Xinman,Zha Qingbing
NiMoO 4 nanorods (NRs) were successfully fabricated on Ni foam with robust adhesion via a simple and cost-effective hydrothermal treatment, followed by a calcined process. In a three-electrode configuration with 3 mol L −1 KOH aqueous solution. The NiMoO 4 NRs supported on Ni foam as working electrodes achieve a high specific capacity of 1320 C g −1 at a charge and discharge current density of 2 mA cm −2 , and a desirable rate capability (884 C g −1 even at 10 mA cm −2 ) and a superior cycling ability with 88% capacity retention after 4000 cycles at 10 mA cm −2 . To enhance the energy density and enlarge the voltage window, the aqueous hybrid supercapacitor has subsequently been constructed by employing the NiMoO 4 and activated carbon electrodes as positive and negative electrodes, respectively, which delivered a high energy density of 52 Wh kg −1 at a power density of 725 W kg −1 . Impressively, the device indicates a long-term cycling stability with capacitance retention of 123% even after 9000 cycles in aa safe voltage range from 0 V to 1.45 V. These results definitely imply the promising prospect of NiMoO 4 NR electrodes for application in supercapacitors.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2021
·
IF 4.126
Shuzhen Cui,Faqiang Wang,Kanjun Sun,Xin Wang,Qinzheng Hu,Hui Peng,Guofu Ma,Ziqiang Lei
Doping metal ions into metal compounds is an effective strategy to improve ionic and electronic conductivity and electrochemical properties of metal compounds. Herein, we demonstrate the design and fabrication of novel Ce-doped NiMoO4 nanosheets by a simple hydrothermal method without adding any surfactants and templates toward achieving high-specific energy aqueous hybrid supercapacitors. The doping of Ce ions into the sheet structure of the NiMoO4 material can expand the tunnel structure of the crystal and enhance the electronic conductivity of the nanomaterials, thus providing the electrode material with a large ion storage space and easy ion diffusion channels. The Ce-doped NiMoO4 nanosheet shows a high specific capacity of 107 mA h g–1 at 1 A g–1, which is higher than that of the bare NiMoO4 nanosheet. In addition, a novel hybrid supercapacitor (HSC) is fabricated by using Ce-doped NiMoO4 nanosheets as the positive electrode and Fe3O4@Bi2O3 nanoarrays as the negative electrode, with aqueous KOH as the electrolyte. The Ce-doped NiMoO4//Fe3O4@Bi2O3 HSC has a high output voltage (1.65 V) and a high energy density of 32.8 W h kg–1 at a power density of 415 W kg–1 as well as good electrochemical stability. The results show that Ce-doped NiMoO4 nanosheets can be used as an advanced electrode for supercapacitors.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2020
·
IF 3.442
Lina Feng,Ping Yang,Wenqin Ling,Shaohua Wang,Jianjun Shi,Fengwu Wang
A hydrothermal method was used to prepare a hierarchical flower-like NiMoO 4 @Ni 3 S 2 composite on a three-dimensional Ni foam substrate, and the effects of different amounts of ethylene glycol in the precursor solution on the morphology and performance of Ni@NiMoO 4 @Ni 3 S 2 were investigated. The as-synthesized No-10/Ni 3 S 2 electrode exhibits a specific capacity up to 870 C g −1 at 0.6 A g −1 and excellent cycle stability (capacity retention of 81.2% after 8000 cycles). More importantly, in a hybrid supercapacitor with a No-10/Ni 3 S 2 as a positive electrode and activated carbon (AC) as a negative electrode (No-10/Ni 3 S 2 //AC), the energy density of 128.31 W h kg −1 at a power density of 7106.4 W kg −1 . As displayed, the performances make No-10/Ni 3 S 2 a promising candidate as high-performance electrode material for supercapacitors .
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Guoguo Wang,Qiuyue Chen,Jing Zhang,Xuguang An,Qian Liu,Lisi Xie,Weitang Yao,Xunping Sun,Qingquan Kong
As an eco-friendly and sustainable strategy, the electrochemical reduction of nitrite (NO 2 – ) can simultaneous generation of NH 3 and treatment of NO 2 – contamination in the environment. Herein, monoclinic NiMoO 4 nanorods with abundant oxygen vacancies self-supported on Ni foam (NiMoO 4 /NF) are considered high-performance electrocatalysts for ambient NH 3 synthesis by reduction of NO 2 − , which can deliver an outstanding yield of 18089.39 ± 227.98 μg h −1 cm −2 and a preferable FE of 94.49 ± 0.42% at −0.8 V. Additionally, its performance remains relatively stable during long-term operation as well as cycling tests. Furthermore, density functional theory calculations unveil the vital role of oxygen vacancies in promoting nitrite adsorption and activation, ensuring efficient NO 2 – RR towards NH 3 . A Zn-NO 2 – battery with NiMoO 4 /NF as the cathode shows high battery performance as well.
研究领域:
电催化
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Catalysis Science & Technology
·
2021
·Vol. 11
·期 22
·7326-7330
·
IF 6.119
Wei Wang,Min Wang
Electrocatalytic oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA) is a promising and green process, which urgently demands high-performance catalysts. In this work, a nitrogen-modulated NiMoO4 growth on Ni foam (N-NiMoO4/NF) is prepared via the treatment of NiMoO4 in 1% NH3 at 500 °C. Compared with NiMoO4, the nitrogen-modulated NiMoO4 promotes electro-oxidation of HMF to FDCA and exhibits almost 100% HMF conversion, 97% FDCA yield, and 91% faradaic efficiency. N-NiMoO4 has a higher electrochemical surface area and lower charge transfer resistance than NiMoO4, which enhances the activity of the catalyst for electrocatalytic oxidation of HMF to FDCA. This work gives enlightenment on the nitrogen modulation method to tune the activity of electrocatalysts for biomass refineries.
研究领域:
化学
·
材料科学
·
可再生资源转化
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Honglong Qu,Tiantian Cao,Qiaolin Li,Gang Chen,Hongtao Guan,Chengjun Dong
Reasonably tuning the structure of Ni 2 P based complex electrode is decisive to boost its applications in supercapacitor. Herein, we demonstrate the design and preparation of NiMoO 4 @Ni 2 P nanosheet arrays with unique core–shell architecture on Ni foam (NF) for pseudocapacitor. The directly grown Ni–MOF on NF was used to couple with NiMoO 4 via an ion exchange between BDC 2− and MoO 4 2- , which is crucial to form a stable NiMoO 4 @Ni 2 P/NF core–shell structure during the subsequent phosphatization. The NiMoO 4 @Ni 2 P/NF electrode can deliver a high capacitance of 3655.1 mF cm −2 at 1 mA cm −2 with a remarkable cycling stability (95.35 % over 4000 cycles). Additionally, the assembled NiMoO 4 @Ni 2 P/NF–2//AC/NF device achieves a stable working voltage of 1.7 V and delivers a superior energy density of 0.155 m Wh cm −2 at a power density of 1.705 mW cm −2 . The outstanding performance of pseudocapacitor is mainly ascribed to the stable diffusion channel, rich reactive species and hetero–interface, enabling fast electrochemical reaction kinetics.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Qianqian Ju,Mengying Du,Guoqing Zu,Liang Gao,Xijia Yang
As a key component of wearable electronic devices, the human–computer interaction system is of great significance for realizing intelligent life. This study develops a smart sensing system with a flexible and stretchable single-electrode triboelectric nanogenerator (NZ-TENG) integrated touch sensing device and a voltage and current (UI) interaction interface. The NZ-TENG is composed of a conductive sponge coated with silicone rubber doped with NiMoO 4 /ZnCo MOF (350) (NZ) hybrid nanoparticles, effectively improving the friction layer’s charge generation ability. When the NZ concentration is 0.05 wt% and the silicone rubber thickness is 2.0 mm, the NZ-TENG achieves excellent output performance, with open-circuit voltage, short-circuit current, and output power density reaching 150 V, 8 μA and 1313 mW m −2 respectively. This touch-sensing device has excellent tensile strength, hydrophobicity, safety, and skin-friendliness. The developed UI interaction interface provides various flexible rehabilitation training modes, targeting the patient’s specific conditions for training. This assembled intelligent human–computer interaction has highly efficient biological signal monitoring and feedback, showing great potential for application in the field of rehabilitation medicine.
研究领域:
材料科学
·
生物医学工程
·
智能设备
✓ 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）