International Journal of Minerals Metallurgy and Materials
·
2026
·Vol. 33
·期 5
·1461-1471
·
IF 8.8
Wang Fan,Geng Mingxiang,Bao Anyang,Lü Yujie,Huang Pengru,Liu Dongming
LiBH 4 , a solid-state hydrogen storage material with ultra-high theoretical hydrogen capacity, is seriously hindered for the practical applications by its high thermodynamic stability and slow hydrogen desorption kinetics. Herein, the dehydrogenation properties of LiBH 4 are remarkably improved by confinement in the porous (Cu,Ni)/Cu 2 O heterostructure (np-(Cu,Ni)/Cu 2 O), which was achieved using a novel two-step method containing dealloying of Mg–Cu–Ni precursor alloy to form the porous (Cu,Ni) solid solution, followed by micro-oxidation under air conditions. Hydrogen release from the constructed LiBH 4 @np-(Cu,Ni)/Cu 2 O (1:2, mass ratio) system begins at approximately 80°C and ends before 380°C, with 12.5wt% of hydrogen desorbed. Moreover, the apparent dehydrogenation activation energy has been reduced to 44.2 kJ/mol. After rehydrogenation at 400°C under 8 MPa hydrogen pressure, the LiBH 4 @np-(Cu,Ni)/Cu 2 O (1:2, mass ratio) system can release 3.6wt% of hydrogen during the second dehydrogenation process. These findings show that the synergistic effect of confinement and heterostructure catalysis provided by the porous metal derivatives can greatly enhance the hydrogen storage properties of LiBH 4 .
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ChemCatChem
·
2026
·Vol. 18
·期 6
·e01859
·
IF 4.1
Jiahao Qi,Shangmeng Ning,Yuan Liu,Yongdan Li,Cuijuan Zhang
Developing high-performance Ni-based catalysts is critical for the practical application of dry reforming of methane (DRM). Herein, the 10wt%Ni/CeO 2 catalyst was mediated by CeAlO 3 formed by interfacial reaction between impregnated Al species and the CeO 2 support. The resultant CeAlO 3 has a significant influence on the structural properties and the catalytic performance. CeAlO 3 can enhance the dispersion of Ni, introduce more oxygen ion vacancies and medium basic sites, which contribute to the high activity and high coking resistance. Furthermore, the enhanced interaction between Ni and the support impedes the sintering of Ni nanoparticles, leading to improved stability. The sample with Al:Ce molar ratio of 0.1 demonstrates impressive performance, at 800°C and 120,000 mL/(h·g cat ), the CH 4 , CO 2 conversion and H 2 /CO ratio are 94.3%, 90.7%, and 0.92, respectively. The activity decreases by <5% over 200 h test at 750°C with a carbon accumulation rate of only 0.54 mg C/(g cat ·h).
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FUEL
·
2026
·
IF 7.8
Jian Wang,Yu Zhao,Tianhua Yang,Xinyong Diao,Yao Tong,Shuang Cui,Bingshuo Li,Rundong Li
Guaiacol, an important lignin-derived compound, presents a central challenge in the efficient upgrading of biomass into sustainable biofuels. Conventional conversion processes are often limited by dependence on corrosive acids, noble metals, or external hydrogen sources, leading to increased costs and safety concerns. In this study, we developed a hydrothermal conversion method that enables guaiacol to catechol transformation without the need for external hydrogen or inorganic acids. This was accomplished using transition-metal-based n Ni– y MoO x /Nb 2 O 5 catalysts capable of cleaving C–O bonds. The results showed that the Ni/MoO x ratio was critical in governing the formation of the NiMoO 4 spinel phase while inducing a strong metal–support interaction (SMSI) that directly affected the surface acidity and oxygen vacancy concentration. Using the 5Ni-5MoO x /Nb 2 O 5 catalyst (Ni/Mo = 1:1) at 300 °C for 2 h, 26.15% guaiacol conversion was achieved, with catechol selectivity 12.9-fold higher than in the noncatalytic system. This superior performance originated from a synergistic effect between the moderate acid strength and the high concentration of defective oxygen vacancies, which collectively drove the selective cleavage of the O–CH 3 bond. The produced catechol serves as a pivotal platform intermediate for synthesizing renewable fuel additives and advanced biofuel components. This study presents a sustainable catalyst design strategy for converting lignin resources into valuable biofuel precursors.
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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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JOURNAL OF CATALYSIS
·
2026
·
IF 6
Xinping Duan,Jinlin Lu,Zhaojun Wen,Xuelian Liang,Haiqiang Lin,Linmin Ye,Youzhu Yuan
In supported metal catalysis, conventional strong metal-support interaction (SMSI) often leads to the encapsulation of active metal sites, thereby suppressing catalytic performance, for instance, nickel-based in thermocatalytic CO 2 hydrogenation. Here, we demonstrate that constructing a defective TiO x overlayer on anatase TiO 2 via room-temperature NaBH 4 treatment effectively transforms the classical SMSI state into a quasi-reactive metal-support interaction (quasi-RMSI) in Ni/TiO 2 -based catalysts. This pre-engineered interface, abundant in Ti 3+ and oxygen vacancies, prevents the formation of a dense TiO x encapsulation layer while facilitating electron transfer to Ni nanoparticles and promoting the activation of both CO 2 and H 2 . As a result, the Ni catalyst exhibits a one-order-of-magnitude increase in the CO 2 methanation rate with nearly 100% CH 4 selectivity, a 12-fold enhancement in turnover frequency, and exceptional long-term stability over 200 h. Combined spectroscopic and microscopic analyses reveal that the quasi-RMSI creates a highly active and accessible Ni-TiO x interface, which significantly accelerates CO 2 dissociation and sequential hydrogenation. This work establishes a general defect-engineering strategy for designing high-performance CO 2 methanation catalysts via tailored quasi-RMSI.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Zeming Yuan,Yize Sun,Chenxu Liu,Tingting Zhai,Xia Li,Zhonggang Han,Yanghuan Zhang
A novel catalyst of Ni/CeVO 4- x @NC (nano carbon) was prepared via the coprecipitation-reduction method and then ball-milled with MgH 2 . During the precipitation process, elemental Ni was formed in situ. The catalyst was characterized to have a multiphase structure, with CeVO 3 as the main phase coexisting with the CeVO 4 phase; the latter contains abundant oxygen vacancies (denoted as CeVO 4- x ). Oxygen vacancy defects facilitate the efficient dissociation of MgH 2 and exert a synergistic catalytic effect with metallic Ni, as well as multivalent Ce and V species. The MgH 2 + 4 wt% Ni/CeVO 4- x @NC composite absorbs 5.36 wt% H 2 within 2 min at 553 K and releases 5.71 wt% H 2 within 78 min. This composite exhibits an initial hydrogen desorption temperature of 465 K, which contributes to the reduction of MgH 2 's thermodynamic stability. First-principles calculations were performed on the MgH 2 + Ni/CeVO 3 @NC model, encompassing the states of the composite both before and after hydrogen absorption and desorption. It was found that the introduction of metallic Ni provides additional quantum states and active sites for electron migration, thereby enhancing the electron transfer capability of the composite surface.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Liubin Shi,Wanjie Xu,Laisen Wang,Dong-Liang Peng,Yuanzhi Chen
Nickel (Ni) ultrafine particles are widely used for the fabrication of inner film electrodes of multilayer ceramic capacitors (MLCCs). In this study, we report an approach to prepare Ni@NiO core-shell ultrafine particles with a size of about 120 nm. Instead of using commonly commercial Ni particles as Ni cores, we prepare Ni ultrafine particles via an aqueous solution reduction, and then conduct a crystallization optimization, followed by a controlled oxidation. NiO shells with a tunable shell thickness ranging from 4 to 7 nm are formed on Ni cores. The Ni@NiO core-shell ultrafine particles exhibit significantly improved oxidation resistance and thermal shrinkage resistance. The corresponding sintered film shows enhanced film integrity and continuity with a low resistivity of 10.6 μΩ cm. The prepared Ni@NiO core-shell ultrafine particles may find potential applications in the field of high-capacity MLCC with thinner Ni electrode layers.
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ACS Catalysis
·
2026
·
IF 13.6
Chufei Wang,Jianing Li,Tao Zhang,Zemin Chen,Aohua Cheng,Ziyi Zhang,Ying Zhang,Aiqin Wang
Abstract Efficient low-temperature hydrogenation of both heteroaromatic and benzenoid compounds using nonprecious metals remains challenging. Here, we report a nitrogen-doped carbon interfacial modification that creates a local hydrogen field (LHF) at the Ni/NC/HAP interface. In situ spectroscopy, kinetic isotope measurements, and molecular dynamics simulations elucidate the origin and kinetic basis of this interfacial microenvironment. Initially, H2 dissociates at Ni sites, and H atoms rapidly migrate across the NC layer via N-functional groups to the HAP surface, where they bind to surface phosphate oxygens to form hydroxyls. As hydrogen supply outruns the slow furan ring saturation, these terminal hydroxyls accumulate to form the LHF. Electronic feedback from this localized field shifts the d-band center and lowers the work function of adjacent Ni sites. This electronic modulation drives substrate molecules into a parallel adsorption geometry at the interfacial active sites, strengthening reactant binding and facilitating activation. The optimized Ni/NC/HAP-0.25 catalyst achieves 99.9% furfural conversion at 40 °C with an apparent tetrahydrofurfuryl alcohol formation rate of 1936.3 mmol molmetal–1 h–1, outperforming Raney Ni by 21.3-fold, and works for diverse aromatic substrates. This study demonstrates that coupling rapid hydrogen supply to interfacial electronic modulation advances low-temperature hydrogenation on nonprecious metals.
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Nature Synthesis
·
2026
·
IF 22.6
Guan Siqi,Yu Tong,Tang Pei,Wu Huize,Wei Qian,Piao Nan,Li Lixiang,Zhu Jianqiu,Zhang Linjuan,An Baigang,Niu Yutao,Hu Guangjian,Sun Zhenhua,Wang Chunyang,Cheng Hui-Ming,Li Feng
Co-free Ni-rich layered oxide cathodes hold great promise for cost-effective, high-energy lithium-ion batteries, but their practical application remains limited by sluggish Li + kinetics and rapid capacity fading. Although doping has been widely used to mitigate these issues, conventional trial-and-error dopant selection remains inefficient for guiding rational materials development. Here we move beyond empirical dopant screening by developing a descriptor-informed multi-component dopant selection strategy based on dopant charge density and metal–oxygen bond strength. Low-charge-density dopants reduce electrostatic barriers to Li + migration, while high-bond-energy dopants reinforce the oxygen sublattice and stabilize the metal–oxygen framework. This doping strategy simultaneously accelerates Li + kinetics, suppresses cycling-induced phase transitions and mitigates chemomechanical fatigue, thereby delivering exceptional electrochemical performance in Co-free Ni-rich cathodes. The enhanced apparent Li + transport and structural stability enable an ultrahigh-rate capability of 130.9 mAh g −1 at 25 C and at 25 °C, excellent cycling retention of 82.4% after 350 cycles at 10 C and robust low-temperature operation delivering 112.2 mAh g −1 at 1 C under −20 °C. These findings, transitioning the design principle from empirical or trial-based selection to a targeted selection regime, present a promising route for developing high-performance cathode materials for lithium-ion batteries.
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ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Honglin Yan,Yuan Ha,Yuan Wang,Lu Li,Chaoyi Zhou,Qianxin Xiang,Zhimin Li
Ni-rich LiNi1–xMnxO2 (NM, x ≤ 0.4) cathodes with high Mn levels have garnered particular attention due to their cost-effectiveness and enhanced safety for lithium-ion batteries, yet their cycling performance remains unsatisfactory. Herein, we investigate the relationship among structure characteristics, cycling performance, and Mn content, revealing that the cycling performance of NM cathodes is associated with Mn-level controlled cation ordering within their structures. Specifically, except for the inherent Li+/Ni2+ disorder, higher Mn levels in NM cathodes tend to disrupt the Ni2+/Mn4+ ordering, resulting in phase segregation and the formation of Mn-enriched regions with Mn3+/Mn3+ pairs. Distorted [Mn3+O6] octahedra, weak interactions between Mn3+ ions, and Mn3+ dissolution in the Mn-enriched regions are detrimental to the structural stability of NM cathodes, thus leading to inferior cycling performance. This study provides a profound understanding of Mn roles in Co-free Ni-rich cathodes and highlights the significance of maintaining cation ordering to achieve high-performance NM cathodes.
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CHINESE JOURNAL OF CATALYSIS
·
2026
·
IF 17.2
Haonan Li,Wa Gao,Kangli Ma,Jian Lei,Olim Ruzimuradov,Akhtam Samiev,Ya Chen,Jingxiang Low,Yue Li
Cocatalyst loading has been extensively adopted in photocatalysis for enhancing photocatalytic performance. However, the sluggish interfacial charge dynamics between cocatalyst and photocatalyst has restricted the wide applications of such a strategy. Herein, we introduce the Ni–N interfacial bonds between lamellar nitrogen-vacancy-rich g-C 3 N 4 /CoNi 2 S 4 nanoparticles (CN-V N /CoNi 2 S 4 ) composite material to bridge the photogenerated charge carrier separation at their interface. Specifically, extended X-ray absorption fine structure analysis reveals that these Ni–N interfacial bonds are originated from the bonding of CoNi 2 S 4 with the nitrogen atoms adjacent to the nitrogen vacancies (V N ) in g-C 3 N 4 . Experimental evidence and theoretical calculations reveal that Ni–N interfacial bonds cannot only cause an intimate contact interface between CN-V N /CoNi 2 S 4 , but also modulate the charge distribution on the CN-V N and CoNi 2 S 4 , further boosting the photogenerated charge carrier separation. More interestingly, this tailored interfacial microenvironment significantly reduces the energy barrier for key intermediates formation while modulates the rate-determining step from *COOH generation to CO desorption, enabling efficient and controllable CO production. This work establishes a methodological framework for engineering advanced photocatalysts, enabling high-efficiency conversion of solar energy into clean fuels.
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WATER SCIENCE AND TECHNOLOGY
·
2016
·Vol. 74
·期 3
·639-646
·
IF 1.064
Zhang Zhen,Zhang Junya,Ye Xiaokun,Hu Yongyou,Chen Yuancai
Ethylenediaminetetraacetic acid (EDTA) forms stable complexes with toxic metals such as nickel due to its strong chelation. The electro-Fenton (EF) process using a cathode made from palladium (Pd), reduced graphene oxide (RGO) and carbon felt, fed with air, exhibited high activities and stability for the removal of 10 mg L −1 EDTA-Ni solution. Pd/RGO catalyst was prepared by one-pot synthesis; the scanning electron microscopy and X-ray diffraction analysis indicated nanoparticles and RGO were well distributed on carbon felt, forming three dimensional architecture with both large macropores and a mesoporous structure. The cyclic voltammetric results showed that the presence of RGO in Pd/RGO/carbon felt significantly increased the current response of two-electron reduction of O 2 (0.45 V). The key factors influencing the removal efficiency of EDTA-Ni, such as pH, current and Fe 2+ concentration, were investigated. Under the optimum conditions, the removal efficiency of EDTA-Ni reached 83.8% after 100 min EF treatment. Mechanism analysis indicated that the introduction of RGO in Pd/RGO/carbon felt significantly enhanced the electrocatalytic activities by inducing •OH in the EF process; direct H 2 O 2 oxidation still accounted for a large amount of EDTA-Ni removal efficiency.
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