CRYSTENGCOMM
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2025
·
IF 2.6
Wei Jia,Qi He,Zhiqiang Guo,Xiang Wu
It is very important to rationally design electrode materials with remarkable electrical conductivity and high specific surface area for supercapacitors. However, it is limited by insufficient energy density, so the development of high-performance electrodes has become research focuses. Herein, we report the synthesis of CoMoO4@Ni(OH)2 composite structures by hydrothermal growth of Ni(OH)2 nanosheets on CoMoO4 materials. The synthesized product achieves 93% of capacitance retention after 10,000 times cycling and possesses a specific capacitance of 2640 F g-1 at 1 A g-1. Furthermore, the assembled device delivers an energy density of 74.25 Wh kg-1 when the power density is 2700 W kg-1. Besides, the materials still present outstanding flexibility and mechanical stability after bending at different angles and times.
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高影响因子
Catalysts
·
2025
·Vol. 15
·期 9
·886
·
IF 4
Qianran Feng,Xiaoting Yu,Jinlian Peng,Siying Du,Liuyun Chen,Xinyuan Xu,Tongming Su
Sustainable production of hydrogen is currently a global research hotspot. In this study, a Ni(OH)2cocatalyst was loaded on Zn0.8Cd0.2S to form Ni(OH)2/ZCS composites and achieve highly efficient photocatalytic hydrogen production. After Ni(OH)2loading, a close contact interface was established between Ni(OH)2and Zn0.8Cd0.2S, which increased the separation efficiency of the photogenerated electrons and holes. Moreover, the addition of Ni(OH)2increases the specific surface area and light absorption of Ni(OH)2/Zn0.8Cd0.2S, and the Ni(OH)2can act as active sites for photocatalytic hydrogen production. The photocatalytic H2production rate of Ni(OH)2/ZCS composites increases with the increase in the Ni amount. 9Ni(OH)2/ZCS exhibited the optimum H2production rate of 12.88 mmol h−1g−1, which was 9.9 times higher than that of Zn0.8Cd0.2S. When the amount of Ni(OH)2is further increased, the excess Ni(OH)2covers the active site of Zn0.8Cd0.2S and reduced the light absorption of Zn0.8Cd0.2S, resulting in a decrease in the H2production rate. Furthermore, the H2production rate of 9Ni(OH)2/ZCS decreased from 12.88 to 5.15 mmol g−1h−1after 3 cycles. The main reason for the decline in the photocatalytic performance of Ni(OH)2/ZCS is the photocorrosion of Zn0.8Cd0.2S. This study provides an innovative design for loading Ni(OH)2cocatalysts on Zn0.8Cd0.2S to improve the performance of photocatalysts.
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ACS Applied Nano Materials
·
2022
·
IF 6.14
Binglin Guo,Yihao Gao,Yongyue Li,Xin Sun,Shuailin Chen,Meicheng Li
Ni(OH)2 has low production cost and high theoretical specific capacity, while on account of the poor electronic conductivity, it shows inferior electrochemical performance including cycling stability and rate capability. This work focuses on a composite material that is in situ grown Ni(OH)2 nanosheets on reduced graphene oxide (rGO), and employing the fewer-defect rGO to build a three-dimensional conductive network provides outstanding conductivity. The specific capacitances (Cm) of the Ni(OH)2/rGO (NHG) electrode are 2776 F·g–1 at 2 A·g–1 and even 1570 F·g–1 at 50 A·g–1, demonstrating remarkable rate capability. It indicates that the combination of the nano grown Ni(OH)2 and rGO conductive substrate shortens the ion diffusion path and increases the electron transfer rate; hence, the composite rate capability has been significantly improved. The composite materials and active carbon were combined to be an asymmetric supercapacitor, which had a high energy density of 39.24 Wh·kg–1 at 1962 W·kg–1. After 10,000 cycles at 5 A·g–1, the capacity retains 91.4%.
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高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yanfei Xin,Xin Dai,Guangjun Lv,Xuedong Wei,Sai Li,Zhiqiang Li,Tong Xue,Ming Shi,Kunyang Zou,Yuanzhen Chen,Yongning Liu
α-Ni(OH)2 is an ideal candidate material for a supercapacitor except for its low conductivity and poor stability. In this work, BO2–-intercalated α-NixCo(1–x)(OH)2 is synthesized by a hydrothermal method at a low cost. The Co dopant can decrease the charge-transfer resistance and enhance the cyclic stability. The special unsaturated electronic state of BO2– enhances the bonding with metal ions and attracts water molecules. Thus, the BO2– ions support the hydroxide layers as pillars and create efficient paths for proton transportation, optimizing the utilization of α-Ni(OH)2. The three-dimensional (3D) flowerlike morphology supplies an enormous number of active sites, and r-GO is added to improve the conductivity. As a result, the modified α-Ni(OH)2 exhibits the specific capacitance of 2179, 1592, and 1423 F·g–1 at 1, 20, and 40 A·g–1, respectively, showing improved rate performance. Matching with the commercial activated carbon (AC) as an anode, the asymmetric capacitor delivers an energy density of 40.66 W·h·kg–1 when its power density is 187.06 W·kg–1. Meanwhile, it retains 81.5% capacitance of the initial cycle at 5 A·g–1 after 3000 cycles. With conductivity enhanced and structure stabilized, the modified α-Ni(OH)2 confronts broader fields of application.
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高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2014
·Vol. 161
·期 10
·B201
·
IF 2.859
Yang Fan,Zijuan Yang,Xinhua Cao,Peifang Liu,Sen Chen,Zhen Cao
Hierarchical macro-mesoporous Ni(OH)2 were prepared by hydrothermal treatment of Ni(NO3)2 with dicyandiamide. This Ni(OH)2 nanostructure can be transformed to mesoporous NiO via calcination at 300°C. The structure, morphology and textural properties of the as-synthesized Ni(OH)2 and NiO were characterized. The electrochemical property and electrochemical sensing performance toward glucose detection were investigated. Owing to the unique macro-mesoporous structure, the Ni(OH)2 nanostructure could provide amperometric sensing of glucose with wide linear range (0.01–8.3 mM), high sensitivity of 243 μA mM cm−2 and low detection limit of 1 μM. Moreover, this glucose sensor also exhibited excellent stability, good selectivity and reproducibility.
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高影响因子
CHEMISTRY OF MATERIALS
·
2025
·
IF 7
Lingying Chen,Jiangchuan Liu,Qinke Tang,Qingzhu Wang,Zeyang Zhang,Kai Liu,Wenrui Li,Jiguang Zhang,Rui Shi,Yana Liu,Jun Wang,Yunfeng Zhu
Active metal hydrolysis is favored for safety and environmental friendliness in the field of hydrogen generation. In practice, however, dense oxide/hydroxide films form instantaneously on the metal surface; these passivating layers act as electronic insulators that severely curtail charge transfer and, consequently, suppress hydrogen evolution. Herein, a novel heterostructure of NiO/Ni(OH)2 was designed to enhance the electron transfer rate in the magnesium powder hydrolysis system, achieving rapid hydrogen production. Surprisingly, Mg-2 wt % NiO/Ni(OH)2 achieved a near 100% conversion rate, producing 880.2 mL g–1 of H2 in only 20 s at 30 °C. Its maximum hydrogen generation rate (mHGR) surpassed that of pure magnesium by 35-fold, and such hydrolysis performance is superior to all the reported results of catalyzed-Mg systems so far. Theoretical studies confirmed that the space charge region in NiO/Ni(OH)2 affects the electronic structure; thus, the correspondingly generated built-in electric field accelerated the hydrolysis of magnesium and greatly facilitated the electron transfer of the system. This work provides a strategy for designing nickel-based oxides/hydroxides catalysts for light metal hydrolysis and facilitates the understanding of the catalytic mechanism in multiphase catalytic systems.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2026
·
IF 4.6
Jinling Wu,Runmiao Chen,Pengjing Yin,Yuanzhen Zhou,Jieli Tang,Chengbin Du,Qi Xue
S-modified MnO 2 /Ni(OH) 2 hollow nanosheets were constructed for enhanced UOR. • Requires 1.30 V at 10 mA cm −2 and remains stable for 48 h. • MnO 2 phase transformation promotes the generation of Ni 3+ active species. • S-modification enhances urea adsorption while suppressing competitive OH − adsorption. The urea oxidation reaction (UOR) provides an alternative anodic process for electrochemical hydrogen generation, but developing catalysts with high activity and sustained performance remains challenging. In this study, we report an S-modified nickel-based catalyst with a hollow nanosheet architecture (α/γ-MnO 2 /Ni(OH) 2 -S), demonstrating enhanced UOR performance in alkaline media. α/γ-MnO 2 /Ni(OH) 2 -S attains a current density of 10 mA cm −2 at a potential of 1.30 V and maintains reliable durability for 48 h without significant degradation. The improved activity and durability are associated with the hollow nanosheet structure, the phase transformation of MnO 2 , and S-modification, which facilitate mass transport and charge transfer, modulate the electronic structure of Ni(OH) 2 to promote the formation of Ni 3+ active species, and enhance the electrochemical response to urea at different concentrations. This research establishes a practical avenue for constructing advanced nickel-based UOR catalysts through rational structural optimization, phase regulation, and surface modification. Download: Download high-res image (125KB) Download: Download full-size image
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2026
·
IF 2.6
Tao Zhou,Kun-Lang Lu,Tao Li,Rui Xiao
Decoupled water splitting offers a safe and efficient route for hydrogen production. However, its practical application remains constrained by issues such as low electrode discharge capacity and poor structural stability. In this study, framework-integrated Ni(OH)2 anodes for membrane-free decoupled water splitting are fabricated. The framework-integrated electrode structure with a carboxymethyl cellulose-based binder affords a well-developed conductive network and robust interfacial contact. This architecture delivers higher discharge capacity and enhanced cycling stability relative to conventional coated electrodes. In addition, the use of nickel powder as the conductive additive improves electronic conductivity, resulting in higher discharge capacity and excellent hydrogen-production performance. The framework-integrated Ni(OH)2 anode maintains a stable structure and electrochemical performance over 100 decoupled cycles, achieving a Faradaic efficiency of 97.3%. The electrical energy consumption for hydrogen production is 3.40 kWh m-3 H2 at 50 mA cm-2.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Bin Yan,Ji Lan,Yueshan Li,Yinjie Peng,Lingying Shi,Rong Ran
In this paper, hexagonal Ni(OH) 2 nanosheets were prepared by hydrothermal method with nickel chloride hexahydrate as matrix and ammonia as precipitant. The lateral size of Ni(OH) 2 nanosheets was about 100–250 nm. The structure of the Ni(OH) 2 sheets was characterized by XRD , SEM , IR, TGA etc. Pickering emulsion was prepared by using Ni(OH) 2 nanosheets as stabilizer and dichloromethane (DCM) as oil phase. Furthermore, the stability factors of Pickering emulsion and the adsorption of Congo red (CR) on interface particle layer were studied. The adsorption equilibrium of CR was analyzed by Langmuir adsorption model and Freundlich adsorption model, and the adsorption process was researched by pseudo-first-order kinetics and pseudo-second-order kinetics. Compared with Ni(OH) 2 in the water phase, the Ni(OH) 2 in interface particle layer exhibited a much higher adsorption capacity and a faster deposition rate . The adsorption mechanism of CR can be mainly attributed to electrostatic interaction between the positively charged interface particle layer and the anionic CR molecules. It can be expected that as a promising adsorbent for CR removal in water treatment, the Ni(OH) 2 sheets in Pickering interface layer can provide a new strategy for dye adsorption.
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高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Xianshu Qiao,Hongjun Kang,Yang Li,Kai Cui,Xin Jia,Henghao Liu,Wei Qin,Max Pupucevski,Gang Wu
We report a highly efficient and stable electrode composed of a porous Fe-doped β-nickel hydroxide nanopyramid array supported on nickel foam (U–Fe-β-Ni(OH)2/NF) for overall water splitting. The unique structure is assembled via a self-templated strategy by utilizing the FeNi oxalate (FeNi–C2O4/NF) nanopyramid as the templates, followed by an anion-exchange reaction at room temperature. Due to the intrinsic activity of Fe-doped β-Ni(OH)2 along with unique porous array structures consisting of two-dimensional (2D) active materials on three-dimensional (3D) conductive substrates, the developed electrode exhibited outstanding electrocatalytic activity for both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in an alkaline medium. The introduced amount of Fe plays a significant role in promoting OER and HER activity compared to the β-Ni(OH)2 electrode. The optimal electrode (U–Fe-β-Ni(OH)2/NF-2) generated a current density of 10 mA cm–2 at low overpotentials of 218 mV for the OER and 121 mV for the HER. The electrode also demonstrated considerably stable performance during the continuous water splitting process. Furthermore, we elucidated the promotion mechanisms of the active Fe-doped β-Ni(OH)2 compound for the OER and HER based on extensive characterization and electrochemical measurements. Hence, this work provides a facile approach to developing low-cost, efficient, and stable hydroxide-based electrodes for bifunctional OER and HER in water splitting.
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PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2026
·
IF 8.4
Qian-Yu Wang,Sian-Hong Ong,Zi-Ye Liu,Zhong-Wei Zhang,Quan-De Li,Ji-Ming Hu
Conductive graphene nanosheets boost oxygen evolution electrocatalysis. • Electrochemically assisted deposition forms porous Ni(OH) 2 /NiO onto freestanding graphene. • Low overpotential of 260 mV at 10 mA cm −2 and Tafel slope of 41 mV dec −1 . • Macroscopic model indicates faster *OOH formation with transfer coefficient of 0.74 Developing low-cost oxygen evolution reaction (OER) catalysts with efficient charge transport and accessible active sites is essential for alkaline water electrolysis. Here we report an electrochemically assisted technique (EAT) to deposit highly dispersed Ni(OH) 2 species on the surface of freestanding graphene (Gr) without deliberate surface functionalization, where a transient SiO 2 -derived framework assists the deposition process of Ni(OH) 2 , followed by heat treatment and alkaline etching to form an intimately contacted Gr@eNi(OH) 2 -NiO composite. On one hand, Gr enables the highly dispersed distribution of Ni(OH) 2 /NiO species and improves the accessibility of active sites for the OER. On the other hand, Gr provides good electrical conductivity and rapid charge-transfer kinetic, leading to high catalytic activity. In 1 M KOH, Gr@eNi(OH) 2 -NiO delivers an overpotential of 260 mV at 10 mA cm −2 and Tafel slope of 41 mV dec −1 , together with stable operation in alkaline electrolyte. Macroscopic kinetics analysis based on current-overpotential fitting further suggests an enhanced potential response of the *OOH-forming step, consistent with improved OER kinetics enabled by Gr-deposit coupling. This work provides a practical route to integrate Ni hydroxide/oxide phases with Gr scaffolds for efficient alkaline water oxidation. Download: Download high-res image (334KB) Download: Download full-size image
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高影响因子
Catalysis Science & Technology
·
2023
·Vol. 13
·期 12
·3568-3578
·
IF 5
Menghui Liu,Chenhui Wang,Zifan Cao,Aiqun Kong,Yusheng Gao,Jinli Zhang,You Han,Wei Li,Yan Fu
A series of 3D self-standing PtRu/Ni(OH)2/NF electrodes is fabricated for electrocatalytic hydrogenation (ECH) of benzoic acid (BA) to cyclohexanecarboxylic acid (CCA). The PtRu/Ni(OH)2 electrocatalyst with a unique coral-shaped architecture possesses outstanding charge transfer ability and abundant active sites. The optimized electrode achieves a BA conversion of 99.00% and a CCA selectivity of 100% in 0.05 M H2SO4 within 80 min, showing a record faradaic efficiency of 43.90% and high performance during 20 cycles of ECH. In situ Raman tests verify the mechanism of the selective hydrogenation of the aromatic ring and density functional theory (DFT) calculations reveal that the electronic interaction between Pt and Ru in the PtRu nanoalloy as well as the electron transfer from the PtRu alloy to the Ni(OH)2 nanosheet tunes the electronic states of PtRu/Ni(OH)2, thereby enhancing the adsorption strength of BA on the electrocatalyst surface. This work offers a promising alternative to the traditional catalytic hydrogenation of BA.
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