ELECTROCHIMICA ACTA
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2017
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IF 4.798
Yaohua Yang,Kai Yan,Jingdong Zhang
A Ni(OH) 2 /TiO 2 photoanode possessing high photoelectrocatalytic activity toward glucose oxidation driven by visible light was fabricated. The results indicated that deposition of Ni(OH) 2 on TiO 2 film electrode could remarkably promote the catalytic oxidation of glucose under visible light illumination. By applying a low voltage, the Ni(OH) 2 /TiO 2 electrode showed a linear photoelectrochemical response to glucose in the concentration range from 0.5 μM to 20 μM. Furthermore, the high photoelectrocatalytic activity of Ni(OH) 2 /TiO 2 electrode toward glucose oxidation was utilized to construct a glucose-air photofuel cell, which generated electrical signal responding to glucose concentration from 5 μM to 100 μM, without using external electrical power supply. Thus, dual non-enzymatic glucose sensors based on photocatalytic oxidation of glucose on the Ni(OH) 2 /TiO 2 electrode under visible light illumination were demonstrated.
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高影响因子
Journal of Materials Chemistry A
·
2025
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IF 9.5
Qingyun Liu,Yi Wang,Tianzhao Hu,Shaorui Chen,Yaozu Wang,Hui Zhao,Wu Zhang,Zhigang Yuan,Yulian Wang,Zhenhua Sun,Feng Li
Achieving high energy density in aqueous asymmetric electrochemical capacitors hinges on the development of electrode materials that combine exceptional capacitance with superior conductivity. Despite its high theoretical capacitance, Ni(OH)2 is limited by low intrinsic conductivity, significantly limiting its performance. In this study, a Mn–Ni(OH)2@1T-MoS2 heterostructure was synthesized through a facile growth method, achieving significant electrochemical performance boost. The lattice matching at the heterointerface induces a controlled lattice expansion in Mn–Ni(OH)2, while the interfacial interactions promote electron transfer from Mn–Ni(OH)2 to 1T-MoS2. These synergistic effects enhance conductivity and active site utilization, addressing the core challenges of pristine Ni(OH)2. As a result, the heterostructure exhibits a high specific capacity of 244.2 mA h g−1 at 1 A g−1 and a rate capability of 51.4% at 12 A g−1. Moreover, the assembled asymmetric electrochemical capacitor delivers an energy density of 61.67 W h kg−1 at 600 W kg−1 and maintains 72.7% capacity retention after 10 000 cycles at 5 A g−1. This work not only highlights the critical role of heterointerfaces in enhanced electrochemical performance but also provides a robust strategy for designing high-performance energy storage systems.
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ACS Applied Materials & Interfaces
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2025
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IF 8.2
Zunjie Zhang,Bingcheng Ge,Mengran Liu,Tianfang Yang,Shuaitong Wang,Yang Liu,Yingjie Yang,Shuyan Gao
The electrocatalytic reduction reaction of nitrate (NO3RR) is anticipated to convert nitrogen-containing pollutants into valuable ammonia products. Copper-based catalysts have received great attention because of their good performance in the NO3RR due to the strong binding energy with *NO3 intermediates. However, the poor H2O dissociation ability of Cu is unable to provide H• in time for the hydrogenation reaction of NOx, thus hindering the electroreduction of the NO3–. Herein, we designed a shell–core nanocube electrocatalyst Cu2O@Ni(OH)2-x (x represents the molar ratio of Ni/Cu) using the liquid phase reduction combined with the etching and precipitation method for electrocatalytic NO3RR. Due to the synergistic effect between the strong nitrate activation ability of Cu and the excellent H2O dissociation ability of Ni(OH)2, Cu2O@Ni(OH)2-3.3% shows an impressive ammonia yield rate (557.9 μmol h–1 cm–2) and Faradaic efficiency (97.4%) at −0.35 V vs. RHE. Operando Raman and Auger electron spectroscopy observe the reduction of Cu2O to Cu during the NO3RR process. Density functional theory calculations combined with electron paramagnetic resonance analysis reveals that Ni(OH)2 can lower the activation energy barrier of H2O dissociation, thereby promoting the generation of H• and accelerating the hydrogenation of *NO during the NO3RR. This research provides an efficient Cu-based catalyst for reducing NO3– and may motivate the development of effective ammonia electrocatalysts for further experimentation.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Zihao Guo,Zeqi Liu,Chaoxuan Wang,Lei Qian
Here, oxygen vacancy was introduced into hexagonal β-Ni(OH) 2 (NV) nanosheets to prepare poly (vinylidene fluoride-co-hexafluoropropylene)-based dielectric composites. Oxygen vacancy gradients were controlled, and the enhanced effects on energy storage performance were systematically investigated. It was found that the oxygen vacancy elevated the Ni 2+ /Ni 3+ ratio, shifted the Fermi level downward and induced formation of deep trap states. The moderate oxygen vacancies produced uniformly distributed deep strap states, which delayed the carrier migration by the capture-release mechanism. The Fermi level (E v − E f ) of NV 1.5 was 1.064 eV and showed the smallest energy separation from the valence-band, resulting in the highest interfacial potential barrier and inhibiting the charge injection. So, the oxygen vacancy obviously affected leakage current, breakdown strength and energy density. It was observed that leakage current density of the composites reduced to 3.48 × 10 −8 A/cm 2 . At the 0.3 wt% loading of NV1.5, the composite achieved a breakdown strength of 792.97 kV/mm and an energy density of 21.15 J/cm 3 (88.17 % over the matrix), with charge–discharge efficiency of 74.12 % and below 1 % performance degradation after 10 4 cycles. This work establishes a novel route based on defect engineering for dielectric storage materials at the atomic level. Download: Download high-res image (101KB) Download: Download full-size image
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
·
IF 6.7
Ting Xiao,Fozia Sultana,Xiaojing Liu,Yu Duan,Renkun Li,Kexin Sun,Tongtong Li,Renhong Li
Exploiting low-crystallinity as a structural feature offers a powerful route to unlock new catalytic functionalities by maximizing defect density, tuning electronic structures, and facilitating rapid charge transfer. Moreover, the disordered catalysts are prone to electrochemical reconstruction, generating highly active oxyhydroxide species, thus promoting the catalytic activity. Here, we first prepare a low-crystallinity Ni(OH) 2 /FeOOH heterojunction pre-catalyst directly grown on nickel foam via electrodeposition, followed by electrochemical reconstruction to synthesize the final electrocatalyst with surface-enriched Ni-Fe oxyhydroxide species (ER-Ni(OH) 2 /FeOOH). The defect-rich structure synergistically couples Ni and Fe species, enabling an exceptionally low overpotential of 241 mV at 100 mA cm −2 for the alkaline oxygen evolution reaction (OER), while maintaining stable operation for over 40 h. The density functional theory (DFT) calculations confirm that the low-crystallinity heterointerface tunes the electronic structure and lowers the energy barrier for the rate-determining (RDS) *OH→*O step, thus providing a theoretical basis for the observed enhancement in OER activity. This work underscores the potential of low-crystallinity interface engineering as a powerful approach for constructing next-generation OER catalysts.
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Reaction Kinetics Mechanisms and Catalysis
·
2026
·
IF 2.1
Hu Yanan,Yang Dawei,Li Qiaoling,Yu Chengcheng
Herein, a Cr-doped Ni-Cu/(NiOH) 2 coating supported on nickel foam (Ni-Cu-Cr/NF) was fabricated via a facile one-step electrodeposition strategy and employed as an efficient electrocatalyst for the hydrogen evolution reaction (HER) in alkaline media. In 1 M NaOH, Ni–Cu–Cr/NF requires an overpotential of 30 mV to reach a current density of − 10 mA cm⁻ 2 and exhibits a Tafel slope of 55 mV dec⁻ 1 . These electrochemical results are associated with the combined effects of the multicomponent composition and an increased electrochemically active surface area (ECSA). The ECSA of Ni–Cu–Cr/NF is approximately 23.6 times that of Ni–Cu/NF. In addition, the catalyst maintains stable operation for 60 h during continuous electrolysis. This work presents a simple preparation method for the novel Ni-Cu-Cr/NF catalyst and systematically investigates the impact of Cr doping on enhancing catalytic performance, providing an effective strategy for the development of nickel-based alloy electrocatalysts. Graphical
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2026
·
IF 6.7
Chao Chen,Meng-Han Li,Ya-Yun Ma,Guo-Zhi Han
Photo-deposition method has the advantages of simplicity, environmental friendliness, and high efficiency, and has been widely used in the field of materials preparation. In this paper, we firstly prepared hollow black TiO 2 microspheres by template method, then using the mesoporous hollow microspheres as a carrier, NiCl 2 ·6 H 2 O as raw material, a novel kind of hollow Ni(OH) 2 @TiO 2 composite microspheres was prepared by photochemical deposition. Characterization of X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), fluorescence spectrophotometry (PL), X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared spectroscopy (FT-IR) indicated that the two units of TiO 2 and Ni(OH) 2 in the composite hollow microspheres form tightly chemical connections. More importantly, this chemical connection endowed the two functional units with mutually enhanced catalytic performance for reduction of aromatic nitro compounds and photocatalytic degradation of emerging organic pollutants. For example, it can catalyze the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) by NaBH 4 with a k value of 0.8457 min −1 , as well as degrade tetracycline hydrochloride (TCH) with a degradation rate of 92.29% within 60 min with a k value of 0.0606 min −1 , which is superior to most previous reports. Finally, based on a series of control experiments, a plausible mutually enhanced catalytic mechanism was proposed.
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高影响因子
JOURNAL OF POWER SOURCES
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2026
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IF 8.4
Yuqian Gao,Haotian Tan,Wenxue Chen,Jinlin Wang,Fan Luo,Hongfu Gao,Maierwaiti Jimosi,Xiaoyuan Zeng
The development of highly efficient and low-cost bifunctional catalysts is pivotal for the large-scale commercialization of water electrolysis technology. A solvothermal method was used to fabricate the bifunctional Ir 0.1 Ni/Ni(OH) 2 electrocatalyst, utilizing Ni(OH) 2 which served as both the support and the nickel (Ni) source for the in-situ formation of IrNi alloy nanoparticles via co-reduction. The significant electronegativity difference between iridium (Ir) and Ni induced electron transfer from Ni to Ir at the alloy interface, resulting in substantial interfacial electronic reconstruction. This electronic synergy optimally regulated the bifunctional activity: the electron-rich Ir sites facilitated the adsorption of hydrogen intermediates, enhancing the hydrogen evolution reaction; whereas the electron-deficient Ni sites strengthened the adsorption of hydroxyl and oxygen intermediates (OH, OOH*), significantly lowering the energy barrier for the oxygen evolution reaction. Therefore, this catalyst exhibits excellent activity and stability in both the OER and the HER. In a 1.0 M KOH solution at a current density of 10 mA cm −2 , the HER requires an extremely low overpotential of only 31 mV, while the OER requires 270 mV. Moreover, Ir 0.1 Ni/Ni(OH) 2 serves as an electrocatalyst for overall water splitting in alkaline media. This research provides a simple and effective strategy for designing advanced alloy catalysts for sustainable energy conversion.
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高影响因子
Inorganics
·
2023
·Vol. 11
·期 6
·236
·
IF 2.9
Jia-Lin Cui,Zhong-Liang Liu,Hui-Hui Li,Chun-Zhong Li
The synthesis of highly efficient heterogeneous catalysts with uniformly dispersed noble metal particles and a suitable size is crucial for various industrial applications. However, the high cost and rarity of noble metals limit their economic efficiency, making it essential to improve the catalytic performance with lower noble metal loading. Herein, a two-step method was developed for the synthesis of uniformly dispersed ~3 nm Pt nanoparticles (NPs), strongly anchored on Ni(OH)2nanosheets (NSs), which was proven by adequate structural characterizations. XPS analysis demonstrated that Ni(OH)2NSs with abundant oxygen vacancies provided sufficient anchor sites for Pt NPs and prevented their agglomeration. The catalytic performance of Ptn/Ni(OH)2(n (represents the addition amount of Pt precursors during the synthesis, μmol) = 5, 10, 15, and 20) NSs with controllable Pt loading were evaluated via the reduction of 4-nitrophenol to 4-aminophenol as a model reaction. The Pt10/Ni(OH)2NSs exhibited the best activity and stability, with a reaction rate constant of 0.02358 s−1and negligible deterioration in ten reaction cycles. This novel synthetic method shows potentials for the synthesis of highly efficient noble-metal-supported catalysts for heterogeneous catalysis.Keywords:Pt/Ni(OH)2nanosheets;oxygen vacancy;heterogeneous catalysis;reduction of 4-nitrophenol
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高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Li Zheng,Chao-Rui Zhang,Dan Zhao,Xuan Wanga,Ting-Ting Du
A β-Ni(OH) 2 flakes modified carbon paste electrode [Ni(OH) 2 /CPE] has fabricated for hydrazine sensing. The β-Ni(OH) 2 flakes derived from nickel hexacyanoferrate (NiHCF) through a facile in situ electrochemical method and characterized by Fourier transform infrared spectrometry, X-ray diffraction, and scanning electron microscopy. Meanwhile, the electrochemical performances of the modified electrode studied by electrochemical impedance spectroscopy, chronocoulometry, cyclic voltammetry, and linear sweep voltammetry. Owing to the large active surface area and enhanced electron transfer efficiency of β-Ni(OH) 2 flakes, the Ni(OH) 2 /CPE showed enhanced catalytic activity toward the oxidation of hydrazine compared with NiHCF/CPE and unmodified CPE. Under the optimized conditions, the amperometric current presented linear dependence on the concentration of hydrazine in the ranges of 0.1 ~ 600 μM with the detection limit of 0.04 μM. Furthermore, the sensor has applied for the determination of hydrazine in water samples.
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高影响因子
JOURNAL OF CHEMICAL SCIENCES
·
2022
·Vol. 134
·期 3
·1-9
·
IF 2.15
Bao Wanting,You Junhua,Zhao Yao,Wang Lu,Yao Ruyue
Electrochemical water splitting has excellent application prospects in clean energy technology. However, due to the large overpotential required for the OER reaction during the water-splitting reaction, the modification of electrocatalysts is a vital strategy to address the slow kinetics of the OER reaction. In this paper, a simple and rapid two-step hydrothermal sulfidation method was used to prepare S-modified Ni(OH) 2 nanosheets electrocatalysts at 120 °C. At the same time, the well-designed nanostructured catalyst on the nickel foam substrate exposes a large number of active sites, and the simultaneously generated oxygen vacancies are beneficial to the penetration of the electrolyte and release of O 2 , thus significantly improving the OER performance. In 1.0 M KOH electrolyte, Ni 9 S 8 /Ni(OH) 2 /NF exhibits excellent catalytic activity for OER. The catalyst requires only 430 mV overpotential at a current density of 100 mA cm -2 . In addition, Ni 9 S 8 /Ni(OH) 2 /NF also has excellent long-term stability. Graphical abstract This work reports the formation of Ni 9 S 8 /Ni(OH) 2 /NF heterojunctions by sulfiding Ni(OH) 2 on porous nickel foam. Surprisingly, these Ni 9 S 8 /Ni(OH) 2 /NF heterojunctions exhibit excellent oxygen evolution reaction performance and long-term stability. This is superior to most reported electrocatalysts for oxygen evolution reactions.
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高影响因子
Journal of Energy Storage
·
2022
·
IF 8.907
Jiahui Fan,Aiying Chen,Xiaofeng Xie,Lijian Gu
Three-dimensional (3D) hybrids are very valuable in the construction of supercapacitor electrodes. Ni(OH) 2 cellular arrays were in-situ grown on nickel foam using Co 3 O 4 nanosheets (NSs) as nucleating agent. The formation, microstructure and supercapacitance performance of the Co 3 O 4 /Ni(OH) 2 cellular arrays are systematically investigated. The Co 3 O 4 /Ni(OH) 2 arrays present an open cellular nanostructure with ultrathin Ni(OH) 2 walls. The Co 3 O 4 /Ni(OH) 2 prepared by hydrothermal reaction of 12 h delivers a super-high specific capacitance of 4396 F g −1 at 1 A g −1 , above the theoretical capacitances of both the Ni(OH) 2 and Co 3 O 4 . Additionally, the Co 3 O 4 /Ni(OH) 2 electrode shows an excellent cycle performance by retaining 80.1% after 5000 cycles and a stable rate capability by decreasing 21.1% from 1 to 10 A g −1 . The assembled asymmetric supercapacitor reaches a large energy density of 32 Wh kg −1 at 7999 W kg −1 by Co 3 O 4 /Ni(OH) 2 as anode and reduced graphene oxides as cathode. The prominent high-capacity performance can be attributed to the cellular arrays, ultrathin hybrid NSs and synergetic reactions of the Ni(OH) 2 and Co 3 O 4 . The proposed technology is also suitable for producing other multi-component oxide/hydroxide arrays as electroactive materials for energy storage devices.
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