INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Adel Al-Salihy,Jing Hu,Ce Liang,Abdulwahab Salah,Ahmed Bahgat Radwan,Ping Xu
The development of efficient, stable, and cost-effective electrocatalysts is crucial for advancing water-splitting technologies toward sustainable hydrogen production. This study introduces nickel molybdate nanorod-nanoflower (NiMoO 4 NRFs) blends decorated with copper nanodots (Cu NDs) on nickel foam (NF) as a dual electrocatalyst. Under alkaline conditions, the Cu NDs/NiMoO 4 NRFs/NF catalyst demonstrated impressive catalytic performance, requiring only −98 mV overpotential for hydrogen evolution reaction (HER) and 208 mV for oxygen evolution reaction (OER) at 10 mA cm −2 . Tafel slope analysis confirmed efficient kinetics, while impedance spectroscopy and capacitance measurements revealed enhanced charge transfer and abundant active sites. The catalyst demonstrated excellent stability for over 160 h, with improved performance after extended durability tests. It achieved a cell voltage of 1.57 V for overall water splitting at 10 mA cm −2 . Density functional theory (DFT) calculations revealed optimal Gibbs free energy for hydrogen adsorption (ΔG *H = −0.03 eV) and suitable oxygen evolution adsorption energy (ΔG *OOH − ΔG *OH = 2.72 eV), along with a lower water splitting barrier (ΔG b = 0.57 eV), supported by synergistic effects between Cu NDs and NiMoO 4 . Structural characterization confirmed uniform Cu nanodot decoration, enhancing electron transfer. This work presents a scalable, cost-effective approach to high-performance electrocatalysts for sustainable energy.
研究领域:
材料科学
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能源技术
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理论计算
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Qing Zhang,Boyun Gao,Fan Sun,Huijiang Huang,Yan Xu,Feng Gao,Yan Wang,Yujun Zhao
This study reports a stable catalyst for NH 3 decomposition to hydrogen. The precursor of SiO 2 @NP was prepared by hydrothermal method, and the hydrothermal treatment of spherical SiO 2 results in etching of SiO 2 and the formation of nickel phyllosilicate, which greatly increase specific surface area of the catalyst. Ru is loaded onto the SiO 2 @NP by incipient wetness impregnation, forming the catalyst 1Ru/SiO 2 @NP. At a gas hourly space velocity (GHSV) of 30,000 mL NH3 (g × h) −1 and 650 °C, the conversion of ammonia over 1Ru/SiO 2 @NP reaches 98%. Furthermore, the catalyst maintains excellent stability during a period of 210 h at 600 °C. To investigate the origination of activity and stability, various characterizations have been used. In its reduced form, Ni and Ru stay metallic, and Ru–Ni interactions are realized. Both high specific surface area and Ru–Ni interactions allow the generation of small metallic particles that are resistant to sintering during reaction process, thus improving the activity and stability of the catalyst. This study provides new insights and references for the preparation of efficient and stable catalysts for NH 3 decomposition.
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2021
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IF 5.816
Anyin Chen,Liang Fu,Wenjun Xiang,Wei Wei,Dan Liu,Changlu Liu
It is essential to search highly active, steady and cheap non-noble electrocatalyst for hydrogen evolution reaction (HER). At present, nickel phosphides are extensively used in electrochemical hydrogen evolution due to its excellent stability and activity. Hence, we report a facile, effective and feasible strategy to synthesis of Ni 5 P 4 nanosheets/nanoparticles structure on carbon cloth, which was fabricated by electroless nickel plating on carbon cloth followed via straightforward thermal phosphidation treatment with NaH 2 PO 2 as phosphorus source. The as-prepared CC@Ni–P electrocatalyst exhibits HER activity with low overpotentials (93 mV vs. RHE) to attain current density 10 mA/cm 2 as well as small Tafel slope (58.2 mV/dec), which outperforms most nickel phosphides electrocatalysts. The excellent HER performance can be ascribed to the large electrochemically active surface area, and phosphorus-rich Ni 5 P 4 phase can supply further bridges sites of Ni and P. Significantly, as-prepared CC@Ni–P catalyst electrode exhibits no apparent HER activity decay after continuous stability test. Beyond that, the approach can be readily used to fabricate large size (5 × 5 cm) nickel phosphide electrocatalyst with excellent HER performance, which may be conducive to the proton exchange membrane (PEM) water electrolyser applications in future. This work opens an effective way to construct excellent performance transition-metal phosphides for HER.
研究领域:
材料科学
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电化学
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DOI
高影响因子
JOURNAL OF APPLIED ELECTROCHEMISTRY
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2016
·Vol. 46
·期 12
·1177-1186
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IF 2.223
Guo Jie,Hou Yongjiang,Li Bo,Wang Yaquan
Abstract The Ni–B-modified carbon paste electrodes were synthesized by the electroless deposition, followed by thermal treatment. Scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy were performed to gather information about the morphology, crystallinity, and binding energy. The fabricated Ni–B/C electrodes are applied to methanol electrooxidation in alkaline media. The results show that Ni–B/C catalyst with a comparable amount of microcrystalline Ni and Ni 3 B, 59 and 41 wt%, displayed a significantly enhanced electrocatalytic activity, which is approximately three times the activity of the unheated Ni–B/C catalyst. The synergetic mechanism of methanol oxidation was proposed that involves one Ni 3 B site favor the adsorption and activation of the methanol molecule and one Ni site for oxidative mediation of methanol. In addition, the kinetic parameters of the reaction were calculated using linear sweep voltammetry. Graphical abstract The illustration of the speculated methanol oxidation mechanism.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Yuwei Ma,Guangtong Hai,Juming Liu,Jinxiao Bao,Yan Li,Ge Wang
Ni-doped cadmium sulfide (CdS) nanospheres with nickel phosphide (Ni 2 P) loading (Ni 2 P@CdS-Ni) were successfully prepared via the two-step thermal treatment growth and chemical reduction method in this work. Firstly, the thermal treatment method was applied to introduce the Ni 2+ into the lattice of CdS and induce the Ni-precursor loaded on surface of the CdS intimately. Then, the Ni-precursor was reduced into Ni(OH) 2 by using the chemical reduction process. Furthermore, the Ni 2 P were loaded on the CdS via the second thermal phosphorization reaction. The loaded Ni 2 P would evidently accelerate the transfer of photo-generated electrons between CdS-Ni and Ni 2 P and meanwhile effectively decrease the charges recombination. Moreover, the results of UV–vis DR spectra and density functional theory (DFT) calculations confirmed that Ni cations doped in the lattice of CdS lead to a doping level at the bottom of the conduct band, which narrowed the bandgap. The work function indicated that doped Ni 2+ helps to enhance the migration and separation of the photo-induced charge. Based on the synergistic effects, 3.7% Ni 2 P@CdS-Ni-3 presented a relatively high hydrogen evolution rate of 176.6 mmol h −1 g −1 under visible light irradiation (λ ≥ 420 nm), which is 63 times of the common CdS.
研究领域:
材料科学
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能源科学
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化学工程
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2023
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IF 6.7
Qiumei Hou,Jingxuan Cai,Li Zuo,Hui Chen,Yuchuan Fu,Jianyi Shen
Supported Ni (60 wt% Ni) catalysts were prepared and phosphided into corresponding Ni 2 P catalysts. They were used for the hydrogenation of furfural as well as for the probe reactions (the hydrogenation of furan and propanal). The results demonstrated that the acidic support promoted the adsorption and hydrogenation of furan ring and aldehyde group over the nickel sites while the basic support played the opposite role. The IR spectra demonstrated that the aldehyde group was more easily hydrogenated than the furan ring at room temperature, implying the sequential hydrogenation of furfural to furfuryl alcohol (FA) and then to tetrahydrofurfuryl alcohol (THFA) over Ni. The microcalorimetric studies revealed that both the aldehyde group and furan ring were strongly adsorbed on Ni so that the Ni catalysts were highly active to hydrogenate the two groups, i.e., the Ni catalysts favored the formation of THFA. On the other side, although the adsorption heats of aldehyde group were much lower on Ni 2 P than on Ni, the adsorption heats were significantly higher for aldehyde group than for furan ring on Ni 2 P, implying the high selectivity to FA on Ni 2 P.
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
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2025
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IF 3.1
Li Zhongchen,Tian Qinghua,Wang Qinmeng,Zulhan Zulfiadi,Wang Songsong,Hidayat Taufiq,Guo Xueyi
With the depletion of high-quality nickel sulfide ore resources, the reliance on laterite nickel ore as a primary raw material for nickel production has increased. The pyrometallurgical process for laterite nickel ore mainly yields ferronickel, which is used predominantly in stainless steel production and falls short of the needs of the burgeoning new energy sector. Consequently, there is an urgent need to develop a new process for producing nickel matte through sulphidizing smelting of laterite nickel ore. The study examines the impact of various parameters, including the sulfurizing agent, reducing agent, flux, and the proportion of ore, on the slag liquidus temperature and nickel and cobalt recovery ratios. The findings reveal that when maintaining the original system with a m (SiO2) /m (MgO) ratio of 1.2, the slag composition remains outside the liquid phase region when altering the CaO content. Increasing the CaO content expands the m (SiO2) /m (MgO) value range for the slag composition within the liquid phase region. Optimized conditions show that with an m (SiO2) /m (MgO) ratio of 2.5, 10 pct CaO addition, 6.5 pct sulfiding agent addition, 4 pct reducing agent addition, p O 2 at 10 −9 atm, and an SO 2 gas flow rate of 4 mL/min, the nickel and cobalt recovery ratios reach 98.72 and 81.92 pct, respectively. Most of the iron transitions to the slag phase, with 79.80 pct entering the slag and 20.20 pct remaining in the nickel matte. The resulting nickel matte contains 19.41 pct Ni, 0.84 pct Co, and 28.39 pct S, primarily comprising nickel-iron, nickel matte, and iron matte phases.
研究领域:
冶金学
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材料科学
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提取冶金
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矿物加工
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Muhammad Akram,Zahira Bano,Seerat Ul Ain Bhutto,Jingwen Pan,Ahmed Uddin,Muhammad Zaheer Afzal,Linrui Li,Mingzhu Xia,Fengyun Wang
This study was conducted to address water pollution concerns entwined with electroless nickel plating (ENP) industry. Its principal endeavor centers on the development and application of an innovative single-compartment technique to proficiently treat spent ENP baths. The research demonstrated the recovery of Nickel (Ni) from wastewater through synergistic interactions between electrocatalytic oxidation and electrodeposition processes. Electrochemical tests used a direct current power supply in constant current mode, with the positive pole on IrO 2 /Ti mesh and negative pole on stainless steel. Zero-valent nickel recovered on the electrodes was conclusively identified via SEM, XRD, and EDS analyses. This work carefully examined the impact of initial pH, initial Ni ion concentration, and current density (CD) on electrochemical recovery efficiency. The findings suggest that higher current densities positively influence the Ni recovery ratio. Additionally, through meticulous experiments, the viability of this approach for treating spent ENP baths has been confirmed. An impressive 98.88% recovery of Ni was achieved under specific conditions: CD 4.5 mA cm −2 , experimental time 180 min, pH 4.5, electrodes spacing 1.5 cm, temperature 55 °C, and a dilution factor 10 times. The study demonstrated the process for Ni recovering from ENP wastewater through direct oxidation and subsequent decomposition, leading to liberation of free Ni ions. The recovered substance, identified as zero-valent nickel, adheres to the electrodes. The method employed in this research is described by its cost-effectiveness, user-friendliness, and low energy consumption. As a result, this study makes valuable contributions to both wastewater remediation and the sustainable utilization of Ni resources.
研究领域:
环境科学
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废水处理
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电化学
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材料科学
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可持续资源管理
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产品关联
DOI
高影响因子
CANADIAN METALLURGICAL QUARTERLY
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2024
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IF 1.3
Xiaohua Peng,Xin Jin,Yong Zhen,Bo Yang,Chang Wei,Xingbin Li,Zhigan Deng,Minting Li
This study introduces a novel synergistic leaching process for ferronickel powder and high nickel matte, enabling the atmospheric leaching and the hematite precipitation process to mitigate carbon emissions associated with the treatment of Ni laterite. The results indicated that following seven cycles of synergistic leaching, the Ni2+ concentration in the solution exceeded 80 g/L, compared with the 15 cycles required for non-synergistic leaching. Optimal leaching conditions included a temperature range of 80°C−95°C, a stirring speed of 300 rpm, an initial H2SO4 concentration of 100 g/L, and a reaction time of 8 h, maintaining a final pH of 3.5−4.5, and an excess of ferronickel powder. Leaching successfully extracted Ni and Fe from ferronickel powder, with Cu2+ in the solution being reduced and enriched in the leaching residue. For the hematite precipitation process, optimal conditions involved a temperature of 200°C, a stirring speed of 500 rpm, a reaction time of 3 h, and an addition of 20 g/L of high Ni matte. The Fe removal efficiency exceeded 86%, resulting in hematite products that contained 61.15% Fe, 0.60% Ni and 1.48% S. These products can be commercially utilised, either sold to cement plants or utilized as raw materials for ironmaking.
研究领域:
冶金工程
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2025
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IF 3.5
Hongzhi Wang,Xiangcheng Shen,Weiguo Zhang,Suwei Yao
The synthesis of low-cost transition metal bifunctional electrocatalysts that can replace noble metals is crucial for realizing high efficiency hydrogen production from industrial water splitting. Herein, a novel binder-free amorphous/crystalline NiFeS@Ni 0.85 Se bifunctional electrocatalyst material has been fabricated on nickel foam (NF) via a straightforward two-step electrodeposition method. The electrode features a unique structure in which NiFeS nanosheets of uniform size grow on Ni 0.85 Se microspheres, thus providing more active sites. It exhibits a minimal overpotential of 63 mV at 10 mA cm −2 for hydrogen evolution reaction (HER) and 311 mV at 100 mA cm −2 for oxygen evolution reaction (OER). Impressively, when assembled into an electrolytic cell, the electrocatalyst can reach 10 mA cm −2 at just 1.51 V and remains stable for 220 h. Additionally, at 1.68 V, the catalyst reaches 50 mA cm −2 and maintains stable operation for 140 h, demonstrating outstanding water splitting potential. This paper presents a composite material that combines the crystalline and amorphous states, allowing them to complement each other and jointly promote catalytic performance.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2024
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IF 12.2
Yunhui Li,Yixiong Chen,Jialin Qing,Zuoying Cao,Shengxi Wu,Qinggang Li,Mingyu Wang,Wenjuan Guan,Guiqing Zhang
The efficient recovery of nickel from chloride systems has long presented a challenge in the field. While solvent extraction is a viable approach, conventional extractants have been associated with drawbacks such as a high requirement for chloride ions and substantial consumption of acids and alkalis. In response to these challenges, this investigation developed and synthesized a novel thiazole-based extractant, N, N-Bis(4-thiazolylmethyl)octylamine (NNBT), tailored for the selective extraction of nickel from chloride systems. Findings from the study indicate that the nitrogen atom situated on the benzylamine framework within NNBT can interact synergistically with the chelating thiazole ring, facilitating effective nickel extraction and notably reducing the need for chloride ions. Furthermore, the extractant can be regenerated using deionized water , thereby obviating the necessity for additional consumption of acids and alkalis. Following the validation of NNBT as an environmentally sustainable and efficient nickel extractant within the chloride ion system, it was successfully employed to selectively and effectively extract nickel from the nickel-aluminum slag of spent HDP catalyst. The extracted nickel and aluminum were subsequently processed into electroplated nickel chloride and polyaluminum chloride, respectively, meeting the national standards of China. These outcomes underscore the eco-friendliness and promise of NNBT for nickel extraction from chloride systems.
研究领域:
冶金工程
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环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
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IF 7.489
Lu Chen,Junrong Zeng,Mengwei Guo,Ruichang Xue,Rongrong Deng,Qibo Zhang
Herein, self-supported Ni 3 S 2 spherical clusters packed with well-defined nanosheets developed on Ni foam (NF) were rationally fabricated via a novel low-temperature solvothermal sulfurization approach in a choline chloride/ethylene glycol (Ethaline)-based deep eutectic solvent (DES). The DES-based sulfurization process drove an interesting time-dependent surface restructuring and phase transformation that occurred on the Ni substrate, leading to the in-situ formation of a Ni 3 S 2 layer with controllable architecture. Pre-deposition of a Ni interlayer on the NF substrate provides more assessable electrochemical surface area and reaction sites, which favored fast crystal nucleation/growth and structural reconstruction. Benefiting from the integrated design and unique 3D interdigital architecture, the optimized Ni 3 S 2 _5/Ni/NF with a sulfurization time of 5 h exhibits a high specific capacitance (specific capacity) of 5,633 mF cm −2 (860.6 μAh cm −2 ) at a current density of 10 mA cm −2 , and maintains 87.7% of initial specific capacitance after 1,000 charge–discharge process at a current density of 20 mA cm −2 . This facile DES-driven solvothermal sulfurization strategy for the fabrication of integrated metal sulfides-based electrode materials could be promising for practical applications in high-performance electrochemical devices.
研究领域:
材料科学
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电化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）