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.
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高影响因子
Sustainable Energy & Fuels
·
2019
·Vol. 4
·期 4
·1654-1664
·
IF 4.912
Caiyun Wu,Yunmei Du,Yunlei Fu,Di Feng,Hui Li,Zhenyu Xiao,Yanru Liu,Yu Yang,Lei Wang
In this study, a composite of Mo, Co co-doped NiS bulks grown on an Ni foam (Mo,Co-NiS/NF) was synthesized as a bi-functional electrocatalyst for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) using a simple method. The existence of ZIF-67 and Mo ensure the even distribution of Co and Mo elements and the formation of N doped carbon layer in Mo, Co-NiS/NF. Mo, Co co-doping and NF support greatly improved the electrocatalytic performance of NiS bulks, because metal element doping could improve the intrinsic activity and electrical conductivity. Moreover, the Ni foam could act as a substrate to avoid aggregation and provide nickel source to form the bimetallic sulfide. The product Mo,Co-NiS/NF-400 showed outstanding electrochemical properties, with ultralow overpotential (92 mV vs. RHE) for HER and ultralow overpotential (117.2 mV vs. RHE) for OER to achieve 10 mA cm−2, as well as the ultralow cell voltage (1.36 V) to achieve 20 mA cm−2 for overall water splitting. This study provides an available method to promote the electrocatalytic activity of the traditional monometallic sulfides for overall water splitting.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2017
·Vol. 53
·期 3
·2077-2086
·
IF 2.599
Li Jingwei,Xu Weiming,Zhou Dan,Luo Jiaxian,Zhang Dawei,Xu Peiman,Wei Licheng,Yuan Dingsheng
Low-cost and highly active water oxidation electrocatalysts are increasingly demanded to improve the efficiency of water splitting. Herein, for the first time, we developed a facile strategy to design a three-dimensional flower-like cobalt nickel phosphate as such an electrocatalyst. The cobalt nickel phosphate was directly supported on Ni foam ((Co 0.5 Ni 0.5 ) 3 (PO 4 ) 2 /Ni) via a simple two-step hydrothermal method.
This method offers several advantages including low cost, facile synthesis and binder-free. Benefiting from its three-dimensional flower-like nanostructure with a big specific surface, high conductivity and the synergic effect of metal ions are the as-synthesized (Co 0.5 Ni 0.5 ) 3 (PO 4 ) 2 /Ni reveals excellent oxygen evolution reaction activity in alkaline electrolyte. It exhibits a low overpotential of 273 mV to reach a current density of 10 mA cm −2 and a Tafel slope of 59.3 mV dec −1 in 1.0 mol L −1 KOH. Notably, the (Co 0.5 Ni 0.5 ) 3 (PO 4 ) 2 /Ni also operates efficiently in 30 wt% KOH, capable of affording an anodic current of 10 mA cm −2 at a lower overpotential of 246 mV and retains its catalytic performance for at least 30 h.
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高影响因子
JOURNAL OF POWER SOURCES
·
2026
·
IF 8.4
Nan Song,Weiguang Hu,Zengyi Ma,Chao Ai,Hong Li,Xinyu Sun,Qing Yan,Qingchao Xia,Weiyong Yuan
The hydrogen evolution reaction (HER) largely determines the performance of Al/seawater batteries, but reported conventional HER catalysts possess low intrinsic activity in the seawater environment, even for the expensive and scarce Pt-based ones. For the first time, a NF-supported Ni-BTC nanoflower array (NF@Ni-BTC NFA) has been synthesized via urea-mediated self-assembly, whereby the urea in situ generates NH 3 to serve as a modulator to both coordinate with Ni 2+ and deprotonate BTC. This 3-D nanostructure exhibits superior HER activity than the NF-supported nanosheet array obtained without urea and even commercial Pt/C in the KOH-added simulated seawater. An Al/seawater battery has been fabricated directly using NF@Ni-BTC NFA as the cathode, showing higher power density, anode efficiency, and energy density than all the reported Al/H 2 O batteries measured in the electrolyte without addition of corrosion inhibitors. This work not only develops a low-cost, highly efficient noble-metal-free HER catalyst for high-performance Al/seawater batteries via facile and economical self-assembly strategy, but provides scientific insights for the self-assembly mechanism and high performance of the HER catalyst and the Al/seawater batteries.
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高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 11
·3493-3500
·
IF 4
Yingping Zheng,Dehua Yu,Wei Xu,Ke Zhang,Kaili Ma,Xinyu Guo,Yongbing Lou,Mulin Hu
Electrochemical water splitting is a potential green hydrogen energy generation technique. With the shortage of fresh water, abundant seawater resources should be developed as the main raw material for water electrolysis. However, since the precipitation reaction of chloride ions in seawater will compete with the oxygen evolution reaction (OER) and corrode the catalyst, seawater electrolysis is restricted by the decrease in activity, low stability, and selectivity. Rational design and development of efficient and stable catalysts is the key to seawater electrolysis. Herein, a high-activity bimetallic phosphide FeCoP, grown on a reduced graphene oxide (rGO)-protected Ni Foam (NF) substrate using FeCo Prussian Blue Analogue (PBA) as a template, was designed for application in alkaline natural seawater electrolysis. The OER activity confirmed that the formed FeCoP@rGO/NF has high electrocatalytic performance. In 1 M KOH and natural alkaline seawater, the overpotential was only 257 mV and 282 mV under 200 mA cm−2, respectively. It also demonstrated long-term stability up to 200 h. Therefore, this study provides new insight into the application of PBA as a precursor of bimetallic phosphide in the electrolysis of seawater at high current density.
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PubMed
高影响因子
SOLID STATE SCIENCES
·
2022
·
IF 3.752
Shijun Xu,Yi He,Siming Yan,Teng He,Hongjie Li,Xiao Guo,Yi Fan
Hydrogen energy is the most promising clean energy at present and hydrogen production by electrocatalytic water splitting is the frontier technology of alternative energy in the future. Herein, the Ni–Mo alloy supported with nickel foam (NF) was prepared by hydrogen reduction strategy at high temperature. The catalytic activity and stability of NiMo@NF-x catalyst (x stands for temperature) with multistage (sheet/particle) array structure were studied under different temperatures. The performance of the catalyst was evaluated by contact angle and related electrochemical characterization. It was found that the surface of NiMo@NF-550 catalyst prepared at 550 °C had superhydrophilic and superaerophobic properties, which contributed to the deactivation of bubbles from the surface of the electrode and improved the efficiency of the catalytic reaction. Moreover, the multi-stage array structure of sheet/particle will form a greater specific surface area than the plain sheet structure, offering more reaction sites. These results indicate that the self-supported superhydrophilic and superaerophobic Ni–Mo catalysts have excellent electrocatalytic hydrogen evolution ability.
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高影响因子
RENEWABLE ENERGY
·
2021
·
IF 8.001
Jianmei Cen,Enjun Jiang,Yuqing Zhu,Zhenyu Chen,Panagiotis Tsiakaras,Pei Kang Shen
Herein, two novel electrocatalysts are simultaneously grown on Ni foam (NF) through a one-step hydrothermal method . The as-prepared Ru–MoO 3- x NF exhibits good performance for HER with low overpotentials of 12 mV at 10 mA cm −2 and 49 mV at 100 mA cm −2 , a low Tafel slope of 32.96 mV dec −1 , as well as an excellent durability at least lasting 17 h in alkaline media . The Fe 3 O 4 –NiFe LDH NF (layered double hydroxide nickel foam) ultrathin nanosheets electrode shows a low OER overpotential of 216 mV at 10 mA cm −2 and a small Tafel slope of 42.42 mV dec −1 . Moreover, a two-electrode water splitting device is fabricated with Ru–MoO 3- x NF as cathode and Fe 3 O 4 –NiFe LDH NF as anode, it only requires 1.46 V at 10 mA cm −2 and exhibits a long term durability without obvious loss of activity after continuously operating for 180 h. The superior catalytic behavior should be originated from the open heterostructure and oxygen vacancies with high intrinsic activity, abundant exposed active sites, and fast charge transfer. This work provides a new strategy to design heterostructure and transition metal oxides catalysts with improved catalytic activity and durability by a facile route for overall water splitting or other applications.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Fanghui Wang,Yajun Zhang,Yimeng Luo,Yanan Wang,Hong Zhu
A dandelion-like CNTs-Ni foam composite carrier supported Co–Mo–P ternary alloy catalyst (Co–Mo–P/CNTs-Ni foam) was prepared by electroless plating . The structure of Co–Mo–P/CNTs-Ni foam catalyst is characterized by XRD , SEM, XPS and EDS . The particle size of Co–Mo–P ternary alloy nanoparticles is about 80 nm. The Co–Mo–P/CNTs-Ni foam completely retains the tubular structure of carbon nanotubes and the gaps between carbon nanotubes of CNTs-Ni carrier, which increases the specific surface area of the catalyst and the flow space of reactants and products. Co–Mo–P/CNTs-Ni foam catalyzes sodium borohydride alcoholysis to produce hydrogen at a maximum rate of 2.64 L ·min −1 ·g −1 , and the reaction activation energy is 47.27 kJ ·mol −1 , which is far lower than that of the spontaneous alcoholysis reaction of sodium borohydride. After the Co–Mo–P/CNTs-Ni foam catalyst was reused 8 times, the catalytic hydrogen production rate was reduced by 23% compared with the initial rate.
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高影响因子
Nanoscale
·
2019
·Vol. 12
·期 3
·1864-1874
·
IF 6.97
Zhiqian Hou,Chaozhu Shu,Peng Hei,Tingshuai Yang,Ruixin Zheng,Zhiqun Ran,Minglu Li,Jianping Long
The degradation of oxygen electrodes caused by oxygen species in lithium–oxygen (Li–O2) batteries deteriorates their energy efficiency and cyclability and seriously hinders their commercial application. To achieve high energy efficiency and long-term cycle life, gradient-porous ultrathin FeCo2S4 nanosheets on Ni foam (FeCo2S4@Ni) were deliberately designed as a noncarbonaceous freestanding oxygen electrode for Li–O2 batteries. Notably, the gradient-porous structure in FeCo2S4@Ni can offer sufficient active sites as well as mitigate polarization caused by the mass transfer during discharge and charge. The synergistic effect of the two transition metals, Fe2+ and Co3+, optimizes their d-band electronic structure and enhances the intrinsic activity of the oxygen electrode. Benefiting from the above merits, the FeCo2S4@Ni based Li–O2 battery demonstrates greatly increased discharge capacity (8001 mA h g−1), improved rate capability (with a high capacity of 4401 mA h g−1 at 500 mA g−1), and enhanced cycling stability (with a low overpotential of below 1 V after 109 cycles). Our work demonstrates that the battery performance can be improved by regulating the structure and composition of the oxygen electrode and provides a promising strategy for developing high performance Li–O2 batteries.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Qingfeng Zhou,Yun Gong,Keyu Tao
Herein, the 2D NiCl(OH) nanosheets and 2D V-doped NiCl(OH) nanoplates assembled by 3D nanosheet arrays supported on nickel foam have been successfully synthesized by a facile one-pot hydrothermal reaction . The dependences of the microstructure and electrochemical performance on hydrothermal reaction time and reactant concentration were investigated, and the electrochemical performance was optimized at 12 h and C Ni 2+ = 0.15 mM. A series of characterization results reveal that the as-prepared V-doped NiCl(OH) nanoplate arrays are successfully grown on nickel foam, and these nanoplates are composed of interconnected ultrathin nanosheets. The thickness of the as-obtained nanosheets increases with increasing reaction time, and the thickness of the optimized nanosheets is about ~20 nm. Vanadium dopant is used as the template agent to alter the morphology of NiCl(OH) nanosheet arrays and form the V-doped NiCl(OH) nanoplate arrays, then leading to a higher specific surface area and lower charge transfer resistance. The cost-effective, binder-free and optimized V-doped NiCl(OH) delivers the high specific capacitances of 2753.3 and 1470.0 F g −1 at the current densities of 1 and 30 mA cm −2 , respectively. Meanwhile, an asymmetric supercapacitor is constructed with the optimized V-doped NiCl(OH) sample as the positive electrode and activated carbon as the negative electrode. The fabricated device can exhibit a high energy densities of 45.5 W h kg −1 at the power density of 799.5 W kg −1 in the voltage window of 0–1.6 V. The efficient electrochemical performance of 3D V-doped NiCl(OH) nanoplate arrays makes it a favorable candidate for supercapacitor electrode material .
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·
IF 4.229
Fanghui Wang,Yajun Zhang,Yanan Wang,Yimeng Luo,Yuenan Chen,Hong Zhu
We used the chemical vapor deposition method to prepare dandelion-like CNTs-Ni foam composite carrier, and then the electroless plating method was used to deposit Co-P nanoparticles on the CNTs of the CNTs-Ni foam. The CNTs-Ni foam and Co-P/CNTs-Ni foam were characterized by BET, SEM, XRD , XPS , and EDS . The results showed that CNTs were uniformly and densely grown in situ on the surface of Ni foam and were further successfully coated with Co-P nanoparticles. The Co-P/CNTs-Ni foam catalysts still maintained the dandelion-like structure and reached a maximum hydrogen production rate of 2430 mL min −1 g −1 at 25 °C. Furthermore, the Co-P/CNTs-Ni foam catalysts also exhibit a remarkable cycling performance and low activation energy (49.94 kJ mol −1 ) for the methanolysis of sodium borohydride .
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高影响因子
JOURNAL OF POWER SOURCES
·
2016
·
IF 6.333
Weiyong Yuan,Ming Zhao,Jia Yuan,Chang Ming Li
The sluggish oxygen evolution reaction (OER) represents a major kinetic bottleneck in water splitting. Herein we report the synthesis of a novel Ni foam (NF) supported 3-D vertically aligned and interconnected layered CoO nanosheet array with controlled density, layer thickness, and interlayer spacing, and the conformal self-assembly of graphene on this nanosheet array. The obtained CoO layered nanosheet/graphene hybrid nanoarray was directly used as an OER electrode, showing a current density of 10 mA cm −2 at an overpotential of 330 mV and a Tafel slope of 79 mV dec −1 , both of which are much lower than pristine NF and the nanosheet array without graphene, and are among the lowest reported for Co-based OER catalysts and transition metal oxide-based ones measured under the same conditions. In addition, it can retain 92.4% of the current density after 66 h of chronoamperometry testing at a potential of 1.0 V vs. SCE , and 94.3% of the current density at 1.0 V vs. SCE after 200 cyclic voltammetry cycles (0–1.0 V vs. SCE). The excellent catalytic activity and stability toward OER are ascribed to the 3-D NF supported robustly grown networked layered nanosheet array structure and the synergistic effects between CoO layered nanosheets and graphene.
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高影响因子
危险品化学品经营许可证（带存储）