CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Qingjun Wang,Zhonghao Li,Lan Ran,Senlin Li,Shukai Diao,Ying Liu,Aidong Tan,Tianrang Yang,Jianguo Liu
Alkaline water electrolysis (AWE) represents the largest-scale green hydrogen production technology, but faces critical challenges: commercial Raney nickel electrodes exhibit insufficient catalytic activity, severe dissolution during intermittent renewable operations, and require energy-intensive fabrication processes. Here, we develop Ni 3 N/Ni heterostructured electrodes with enhanced adhesion and optimized morphology through induction heating and ammonia reduction. The electrodes demonstrate superior energy conversion performance with uniform morphology, enhanced hydrophilicity, and optimized gas management, resulting in enlarged electrochemical active surface area and reduced hydrogen evolution overpotential (η 100 = 141 mV). Single-cell evaluation reveals a current density of 585 mA/cm 2 at 1.8 V with operational stability exceeding 1500 h. Critically, nitridation enhances both catalytic activity and corrosion resistance, enabling reliable operation during frequent start-stop cycles. These findings address critical challenges in AWE and facilitate efficient integration between renewable energy and green hydrogen production.
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2025
·Vol. 172
·期 9
·092509
·
IF 3.3
Zhize Yu,Tingting Tang,Yutao Cao,Shuo Cui,Min Li,Ying Wu,Wenhui Fang,Zengxi Li,Hong Zhao
Incorporating catalytic metals with alloy can significantly facilitate electrocatalysis of hydrogen evolution reaction (HER) through a synergistic effect. However, constructing an effective metal-alloy heterointerface remains a challenge. In this study, we synthesize a Ni/Ni4Mo catalyst on Ni foam (NF) through a straightforward two-step electrodeposition process. Initially, Ni4Mo is obtained using a constant potential deposition method. Then the incorporation of Ni leads to the formation of Ni/Ni4Mo heterointerface, increasing interfacial activity and exposing more active sites, thereby enhancing the electrocatalytic performance. The Ni/Ni4Mo@NF catalyst exhibits outstanding HER performance with low overpotentials of only 148 mV at 500 mA cm−2 and 24 mV at 100 mA cm−2 in 1 M KOH. Furthermore, in a combined glycerol oxidation reaction (GOR) and HER system, the Ni/Ni4Mo@NF||Ni/Ni4Mo@NF requires only 1.41 V to achieve a current density of 50 mA cm−2, a 260 mV reduction compared to conventional overall-water splitting. The Ni/Ni4Mo catalyst also demonstrates good long-term stability. This work provides key insights into designing high-performance metal-alloy heterointerface catalysts for energy-efficient hydrogen production.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Senmiao Zhao,Tianxin Wu,Ke Wang,Qiyue Wang,Xiaodan Mei,Jinglan Huang,Haizhen Liu,Cunke Huang,Jin Guo
In this study, a Ni–C co-dispersed catalyst (denoted as Ni&C) with a uniform spherical morphology (≈2 μm diameter) and Core-shell structure was synthesized using Ni-based metal-organic framework (MOFs) as precursors. The Core-shell Ni&C catalyst significantly improved the dehydrogenation kinetics of MgH 2 . The MgH 2 –Ni&C composite exhibited a remarkably low onset dehydrogenation temperature of 192.6 °C, which is 136.9 °C lower than that of pure MgH 2 . The peak dehydrogenation temperature and dehydrogenation temperature span were reduced by 120 °C and 31.3 °C, respectively. At 300 °C, the composite released 5.82 wt% H 2 within 2.1 min. The apparent activation energy for dehydrogenation decreased to 76.78 kJ mol −1 , far below that of pure MgH 2 (138.18 kJ mol −1 ). Mechanistic analysis revealed that Mg 2 NiH 4 /Mg 2 Ni phases formed in-situ during hydrogen cycling acted as "hydrogen pumps" and nucleation promoters of matrix, while the carbon provided good spatial confinement and enhanced thermal conductivity . Moderate coupling between Ni and C generated synergistic effects , collectively optimizing the dehydrogenation performance.
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高影响因子
CORROSION
·
2023
·Vol. 80
·期 2
·187-196
·
IF 1.6
Li Bowen,Pan Fengze,Pan Chengyu,Lv Tianyi,Wang Xiaotian,Ju Xiang,Gong Kaifei,Zou Wenkai,Zheng Chuanbo
The Ag-Ni-Co alloy coating is prepared in the low eutectic solvent system by pulsed power supply technology. Infrared spectroscopy and cyclic voltammetry are used to confirm that the addition of metal salts does not change the low eutectic solvent system. When the current density is 1 A/dm 2 and the plating time is 40 min, the plating grain is mainly spherical; the coating is uniform and dense. After testing, the surface-specific resistance of the plating is only 1.295 mΩ·cm 2 , the microhardness reaches 214.8 HV, and the wear rate reaches 3.1. The corrosion resistance of the plating and the substrate is analyzed by a combination of macroscopic electrochemistry and microarea electrochemistry, and the results show that the corrosion potential of the plating reaches −0.141 V, and the corrosion current density reaches 1.299 × 10 −7 A/cm 2 . The corrosion resistance of the plating is much greater than that of the substrate.
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高影响因子
DIAMOND AND RELATED MATERIALS
·
2024
·
IF 4.3
Kaiqiang Ma,Lan Zhang,Huizhong Ma,Na Li
In this study, the wear resistance of diamond dicing blades can be enhanced by electrodepositing a Ni-graphene coating. We prepared Ni-Gr (graphene)-diamond blades through composite electrodeposition in a nickel electrolyte containing varying concentrations of graphene. The microstructure of the composite coating was investigated using characterization techniques, while the deposition of the Ni-Gr was studied using commercial modeling software, namely the COMSOL® electrochemical module. The primary objective of this study was to investigate the pathways leading to the development of high-quality dicing blades. The results obtained from the COMSOL® simulations unveil the influence of graphene particles and cathode conditions on the microstructure and performance of the composite coating. Our experimental results demonstrate that the incorporation of graphene induces modifications in the texture of the Ni matrix, resulting in the emergence of a noncoherent phase boundary. This effect can be attributed to the preferential formation of nucleation sites at heterogeneous interfaces, which were facilitated by the embedding of graphene, resulting in non-uniform nucleation. Furthermore, to explore the mechanical properties of said noncoherent phase boundary, graphene electrodes were prepared using discharge plasma sintering, resulting in, a pure 20 μm thick Ni coating electrodeposited onto the graphene electrode. Micro-nano testing techniques using different peak loads at 25 °C were employed to analyze the mechanical behavior of the graphene substrate, Ni-Gr interface, and Ni phase. Nanoindentation testing revealed an interface adhesion strength of 12.89 N between the graphene substrate and the Ni coating. Indentation experiments in the Ni-Gr interface demonstrated that the elastic moduli of the interface were 23.91 GPa and 28.72 GPa at 20 mN and 300 mN loads, respectively. Additionally, the elastic moduli of the graphene phase was approximately between 6.25 % and 5.56 % that of the Ni phase.
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高影响因子
Materials
·
2024
·Vol. 17
·期 5
·1200
·
IF 3.1
Wei Tong,Weiqiang Wang,Xiayu Leng,Jianli Song
To enhance the comprehensive performance of solid oxide fuel cells (SOFCs) ferritic stainless steel (FSS) interconnectors, a novel approach involving composite electrodeposition and thermal conversion is proposed to prepare Ni-doped Co-Mn composite spinel protective coatings on FSS surfaces. The process involves the composite electrodeposition of a Ni-doped Co-Mn precursor coating, followed by thermal conversion to obtain the Co-Mn-Ni composite spinel coating. Crofer 22H was used as the substrate and orthogonal experiments were designed to investigate the influences of deposition solution pH, stirring rate, cathode current density, and the element content of Mn and Ni on the surface morphology and properties of the composite coatings, respectively. The characterization of the prepared coatings was conducted through macroscopic and microscopic morphology observations of the component surface, energy dispersive spectroscopy (EDS) analysis, and area specific resistance (ASR) testing, etc. Finally, the optimized composite electrodeposition parameters and the Mn-Ni content ratio in the solution were obtained. Experimental results indicated that the composite spinel coating prepared with the optimized process parameters exhibited excellent adhesion to the substrate, and the diffusion and migration of Cr element has been effectively inhibited. Compared with the substrate, the ASR of the coated components has also been decreased simultaneously, which provided an effective method for the surface modification of SOFC FSS interconnectors.
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PubMed
高影响因子
IONICS
·
2019
·Vol. 26
·期 1
·449-456
·
IF 2.289
Zheng Li,Zhang Wen,Guo Jun
A modified electrode Ni(II)–ARS/GR/CPE has been fabricated by electrodepositing nickel(II)–alizarin red complex on the surface of graphene-modified carbon paste electrode (GR/CPE) in alkaline solution. The modified electrode is characterized by scanning electron microscopy, Fourier transform infrared spectrometry, x-ray photoelectron spectroscopy, cyclic voltammetry, and electrochemical impedance spectroscopy. It exhibits the characteristic of improved reversibility and enhanced current responses of the Ni(III)/Ni(II) couple compared with Ni(II)–ARS/CPE. It also shows enhanced electrocatalytic activity toward the oxidation of formamide, which is due to the high surface area and facile charge–transfer ability of graphene and Ni(II)–ARS complex. The mechanisms of film formation and the catalytic process are also discussed. Moreover, the catalytic currents present linear dependence on the concentration of formamide from 0.5 mM to 0.21 M by amperometry; the detection limit is 0.15 mM. The modified electrode for formamide determination is of the property of simple preparation, good stability, fast response, and acceptable sensitivity.
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高影响因子
FUEL
·
2019
·
IF 5.128
Tengfei Yang,Congcong Liu,Chuan Li,Liyong Gan,Wenan Deng,Qingshan Niu
Nickel sulfide is regarded as one of the most promising substitutes for the best-performing disposable molybdenum catalyst in the hydrogenolysis of lignite and heavy residue, but its practical application is hindered severely by insufficient catalytic activity and a prohibitively large dosage. Herein, we report that the issues of activity and cost of nickel sulfide can be addressed simultaneously by employing a combination of iron incorporation and a dispersing strategy via oil-soluble ligands. Motivated by first-principles calculations where iron incorporation in nickel sulfide would lead to a better activity towards the rate-limiting step of hydrogenolysis compared with nickel sulfide alone, we successfully prepared a well-dispersed Fe-Ni-S catalyst by coordinating active metal salts with carboxylate ligands and a subsequent essential sulfurization. The synthesized Fe-Ni-S catalyst outperformed not only the monometallic nickel catalyst but also the commercial molybdenum catalyst in the hydrogenolysis of lignite and heavy residue, and exhibited a high conversion efficiency, hydrogen consumption, hydrogen/carbon product atomic ratio, and dispersibility of solid residues, with an economic nickel dosage of as low as ~250 μg·g −1 . Structural changes of raw coal and solid residues further confirmed the role of the Fe-Ni-S catalyst in facilitating the hydrogenolysis of lignite and heavy residue.
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高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2020
·Vol. 34
·期 8
·e5722
·
IF 3.14
Jiadong Wang,Fakhre Alam,Qiqi Chang,Yanhui Chen,Tao Jiang
The methylene spacers and an uncoordinated diphenylphosphine moiety in the scaffold of the CH 3 Si(CH 2 ) n (PPh 2 ) 3 and Si(CH 2 PPh 2 ) 4 -type silylated diphosphine Ni(II) complex systems have a marked impact on their catalytic performance in selective ethylene dimerization. Ni(II)-based precatalyst 1 , bearing two methylene spacers in its framework, exhibited the highest catalytic activity of 1.29 × 10 8 g (mol Ni ) -1 h -1 , while precatalyst 3 , with three methylene spacers, affords the highest product selectivity (88%) toward the C 4 fraction. Crystallographic investigations revealed that the precatalyst 3 adopts the mononuclear bidentate binding mode and the steric constraints of its uncoordinated diphenylphosphine moiety may successfully tailor the catalytic environment of the catalyst. The precatalyst 4 may form a dinuclear complex and exhibits high catalytic activity by changing the ligand/Ni molar ratio. The high C 4 selectivity of precatalyst 3 has been rationalized by density functional theory (DFT) calculations and found to be consistent with the experimental results. The study also revealed that designing new systems of Ni(II)-based complexes and their systematic modifications may further provide potential and industrially viable catalyst systems for selective ethylene oligomerization.
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高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2019
·
IF 1.795
Yong Zhang,Han-xin Mei,Hai-li Gao,Qing-yuan Huo,Xiao-dong Jia,Yang Cao,Shi-wen Wang,Ji Yan,He-wei Luo,Jing Yang,Ai-qin Zhang,Ke-zheng Gao
(NH 4 )(Ni,Co)PO 4 ·0.67H 2 O (NNCP) was successfully synthesized by a simple one-step low-temperature hydrothermal method , and modified by metal oxides CuO , MnO 2 and Co 3 O 4 , so that the composites with different length scales and different energy storage mechanisms could be synergistically integrated. The electrochemical behaviors of NNCP, NNCP/CuO, NNCP/MnO 2 and NNCP/Co 3 O 4 as supercapacitor electrode materials in 3 mol·L −1 KOH electrolyte were studied by cyclic voltammetry (CV), galvanostatic charge/discharge (GCD) and electrochemical impedance spectroscopy (EIS), and the morphology and structure of the synthesized materials were studied by SEM, XRD and Raman spectrum . Compared with other samples, the optimized NNCP/MnO 2 composites have higher specific capacitance and remarkable rate capability due to the micron flower-like rich interface structure , which provides a more active sites for electrochemical reaction , a shorter transport path for electrolyte ions, and the synergistic effect of NNCP and MnO 2 . The specific capacitances of NNCP/MnO 2 at current densities of 1, 4, 7 and 10 A g −1 are 3626, 3336, 3140 and 3104 F g −1 , respectively. These excellent properties confirm that the composite material has broad application prospects in the field of supercapacitor materials .
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高影响因子
CATALYSIS LETTERS
·
2019
·Vol. 150
·期 5
·1418-1426
·
IF 2.372
Ma Yuan,Liu Jiao,Chu Mo,Yue Junrong,Cui Yanbin,Xu Guangwen
Abstract The key challenge for CO 2 methanation, an eight-electron process under kinetic limitation, relies on the design of non-noble metal catalysts so as to achieve high activity at low reaction temperatures. In this work, four Ni-based catalysts with different supports were prepared and tested for CO 2 methanation at 250–550 °C in a fixed bed quartz reactor and further characterized to reveal the structure–function relationship. The Ni-based catalysts followed an activity order of Ni/CeO 2 > Ni/Al 2 O 3 > Ni/TiO 2 > Ni/ZrO 2 , especially at temperatures lower than 350 °C. H 2 -TPR and TPD results indicated that the interaction between nickel and support was strong and the metallic nickel was well dispersed in the Ni/Al 2 O 3 catalyst, while more amount of CO 2 was adsorbed on the weak basic sites in the Ni/CeO 2 catalyst. By establishing the correlation between the catalytic performance and the catalyst structure, it was found that the Ni nanoparticles and basic support serve as H 2 and CO 2 active centers respectively and cooperatively catalyze CO 2 methanation, resulting in high low-temperature reaction activity. Graphic Abstract High CO 2 conversion was achieved over Ni/CeO 2 catalyst at 300 °C for its high H 2 uptake on Ni nanoparticles and high CO 2 adsorption capacity on the support with weak basic sites and cooperatively to catalyze CO 2 methanation.
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高影响因子
Coatings
·
2026
·Vol. 16
·期 10
·1168
·
IF 3.4
Yunqing Xia,Shaomu Wen,Ming Wen,Ying Xiong,Hongjie Li,Guochuan Tu,Aiwei Sun,Lifen Tong
In this study, we attempted to use the response surface methodology with temperature, pH and thiourea concentration as control variables by systematically varying the experimental parameters in order to find the optimal preparation process for electroless deposition of Ni-B coatings. A mathematical model of the effect of different experimental parameters on the impedance of Ni-B coating was constructed by selecting the Box–Behnken Design (BBD) design, and the optimum plating solution temperature, pH and thiourea concentration for electroless deposition of Ni-B coating were discussed through optimization analysis. The surface microstructure of the Ni-B coating was characterized by SEM. The chemical composition of the Ni-B coating was analyzed by XRD and EDS, and the corrosion resistance of the coating was characterized by EIS and potentiodynamic polarization techniques. The results showed that the best morphology and the best corrosion resistance of the coatings were achieved when the plating solution temperature was 69.31 °C, the plating solution pH was 6.06, and the concentration of thiourea was 0.0015 g/L. The predicted impedance value was 5828.77 Ω, while the impedance value of the prepared coating based on the experimental setup parameters was 6041 Ω.
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高影响因子
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