DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 47
·17774-17784
·
IF 4.39
Fangfang Wang,Zihao Liu,Kuanjian Zhang,Qingqing Zha,Yonghong Ni
Developing active, durable, and inexpensive electrocatalysts for the oxygen evolution reaction (OER) is drawing increased interest. Here, a mild hydrothermal–electrodeposition two-step route is designed for the preparation of Ce-doped Ni–S@NiMoO4 micropillar composites on nickel foam (CeNiS@NiMoO4/NF). The as-constructed CeNiS@NiMoO4/NF electrode shows an ultralow overpotential, fast kinetics, superb intrinsic activity and excellent long-term stability for the OER. In 1 M KOH solution, 187 mV overpotential is required to deliver a current density of 10 mA cm−2 with a Tafel slope of 35.28 mV dec−1, and in a saline-alkaline solution of 1 M KOH and 0.5 M NaCl, only 260 mV overpotential is needed to reach 100 mA cm−2, demonstrating its excellent OER performance. The above outstanding electrocatalytic activity is attributed to the influence of CeNiS nanosheets on the surface microstructure of NiMoO4 micropillars, which not only improves the conductivity of the catalyst, but also increases the surface area, as well as accelerates the escape of gases produced. Compared with other non-precious metal OER electrocatalysts, the as-prepared CeNiS@NiMoO4/NF presents stronger or close electrocatalytic activity and better durability, which provides a new electrocatalyst selection in practical applications.
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TRANSACTIONS OF TIANJIN UNIVERSITY
·
2018
·Vol. 24
·期 3
·201-211
·
IF 0
Wang Fumin,Liu Mengchao,Zhang Xubin,Lv Guojun,Sun Mingshuai
In this study, we designed and synthesized a novel battery-type electrode featuring three-dimensional (3D) hierarchical ZnO@Ni
x
Co 1− x (OH)
y
core/shell nanowire/nanosheet arrays arranged on Ni foam substrate via a two-step protocol including a wet chemical process followed by electro-deposition. We then characterized its composition, structure and surface morphology by X-ray diffraction, energy-dispersive X-ray spectrometry (EDS), X-ray photoelectron spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy, EDS elemental mapping. Our electrochemical measurements show that the ZnO@Ni 0.67 Co 0.33 (OH)
y
electrode material exhibited a noticeably high specific capacity of as much as 255 (mA·h)/g at 1 A/g. Additionally, it demonstrated a superior rate capability, as well as an excellent cycling stability with 81.6% capacity retention over 2000 cycles at 5 A/g. This sample delivered a high energy density of 64 W·h/kg and a power density of 250 W/kg at a current density of 1 A/g. With such remarkable electrochemical properties, we expect the 3D hierarchical hybrid electrode material presented in this work to have promising applications for the next generation of energy storage systems.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Rui Zhang,Zhiling Chen,Yi Li,Delun Chen,Tao Wang,Bingrong Wang,Qionglin Zhou,Shaowen Cheng,Dan Xu,Xiaohong Wang,Lina Niu,Jinchun Tu,Qiang Wu
The use of zinc oxide (ZnO) photosensitizers (PSs)-mediated photodynamic therapy (PDT) against bacterial wound infections is greatly restricted by diminished photocatalytic efficiency caused by the rapid recombination of photogenerated electrons and holes. In this work, ZnO PSs with a Ni-doped/oxygen vacancy and a protective carbon shell were successfully synthesized by calcinating a Ni-doping zeolitic imidazolate framework-8 precursor. The double-defect structure and the carbon-based substrates significantly promoted the efficiency of photogenerated electron–hole pair separation, meanwhile, the optimal proportion of 3% Ni doping endows it with the best photocatalytic performance as elucidated by photodegradation assays of methylene blue (MB) and density functional theory (DFT) calculations, reinforcing the generation of reactive oxygen species (ROS) by ZnO and showing obvious advantages in antibacterial properties. As the ROS damage that facilitates the photogenerated electron transfer underwent localized accumulation, the PSs disturbed the bacterial membrane integrity and caused bacterial ATP synthesis inhibition, further leading to bacterial lysis and promoting bacterial deaths. Additionally, the PSs showed outstanding efficacy in eradicating bacterial biofilms. Simultaneously, the significantly enhanced PDT antibacterial performance of the PSs in vivo could initiate wound tissue repair and trigger anti-inflammatory reactions by significantly regulating the expression levels of regeneration- and inflammation-related genes or proteins. Furthermore, the PSs consistently exhibited favorable compatibility both in vitro and in vivo . In summary, this study offers evidence of the remarkably efficient and biologically safe performance of Ni-ZnO@C PSs, with antibacterial properties advancing wound healing, both in controlled laboratory environments and living organisms, further underscoring their substantial potential for biomedical applications.
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2025
·Vol. 39
·期 11
·e70403
·
IF 0
Yingxue Zhang,Qiang Wang,Jingwen Cao,Xinhao Zhang,Yongze Zhang,Yali Chen
Gas tracer technology plays a crucial role in enhancing oil recovery during oil and gas field development. However, the limited storage capacity and detection efficiency of current gas tracers hinder their broader application. In this study, Ni-MOF-74 was successfully synthesized through a solvothermal method and subsequently modified by grafting perfluoroalkyl chains. The results demonstrated that the crystal structure and morphology of the material remained stable following fluorination, while its thermal stability was significantly improved. Notably, the specific surface area decreased with the increasing length of the grafted perfluoroalkyl chains, accompanied by a reduction in surface free energy. Additionally, the number of Lewis acidic sites increased, while the number of Lewis basic sites decreased. Adsorption performance tests revealed that the modified Ni-MOF-74 exhibited high adsorption capacities for difluorochloromethane (R22) and tetrafluoroethane (R134a), with values of 2.623 mmol·g −1 and 2.385 mmol·g −1 , respectively. These capacities were significantly higher than those of conventional activated carbon adsorption tubes. This study offers a novel approach to efficient gas tracer storage/detection and provides theoretical insights into the potential application of metal–organic frameworks (MOFs) in oil and gas field development.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-11
·
IF 15.7
Zhu Zhijie,Qian Shuairen,Dong Xudong,Liu Shuang,Zhou Yuxuan,Nie Kaiqi,An Xingda,Li Chaoran,Cheng Yi,Yan Binhang,Feng Kai,Zhang Xiaohong,He Le
Plasmonic photocatalysis offers a promising route to harvest solar energy and drive chemical reactions by the generated heat and energetic charge carriers towards a low-carbon economy. Understanding the mechanisms of plasmonic photocatalysis is vital for the rational design of efficient catalysts but remains a great challenge. Here we report the discovery of an overlooked photocatalytic mechanism based on the enhanced coverage of CO on an Au-Ni heterostructure under light. Detailed studies reveal that hot carrier transfer from Au to Ni via plasmonic excitation increases the electron density of Ni, thereby boosting the population of Ni sites capable of CO adsorption. This increase in active CO-binding sites, rather than local heating or altered adsorption properties of individual Ni sites, is found to be the major contributor to the light-promoted CH 4 production in the Au-Ni-catalyzed CO hydrogenation reaction. This mechanism is further validated by the observation of higher CH 4 selectivity in photocatalytic CO 2 hydrogenation. Our study deepens the mechanistic understanding of plasmonic photocatalysis and offers new ideas for the design of advanced catalytic structures.
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高影响因子
DALTON TRANSACTIONS
·
2025
·
IF 3.3
Taozhu Li,Yu Liang
The application of NiTi alloys in the electrooxidation of urea is primarily based on their unique electrochemical activity and stable chemical properties. It has been found that during electrochemical cyclic voltammetry treatment, a Ni(OH)2 layer with high catalytic activity can be formed on the surface of NiTi alloys, which significantly enhances the efficiency of urea electrooxidation. Electrochemical studies reveal that NiTi@Ni(OH)2 exhibits voltage-dependent selectivity between urea oxidation and water oxidation. When the applied potential is less than 1.47 V, the electrode undergoes urea oxidation; in contrast, when the applied potential exceeds 1.54 V, the electrode reaction switches to water oxidation. That is, the selectivity between urea oxidation and water oxidation can be achieved by adjusting the applied potential, which provides a new approach for the selectivity control of electrochemical reactions.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Wenchao Niu,Jing Li,Jia Wang,Yujie Li
Single-crystalline Ni-rich LiNixMnyCo1–x–yO2 (SNCM, x ≥ 0.8) materials are regarded as next-generation cathodes for lithium-ion batteries. However, SNCM cathodes show readily low structural stability due to surface reconstruction and irreversible strain evolution during cycling at high voltages. Here, we demonstrate that Y2O3 material incorporated into SNCM cathodes forms an epitaxial entropy-assisted surface layer, which acts as a highly compatible region to facilitate Li-ion transmission, suppress interface reaction and transition metal dissolution. Meanwhile, soluble Al ions are uniformly distributed in the SNCM lattice and combine with the surface Y–O bond, forming a pillaring effect to restrain irreversible strain evolution, eventually prevent the formation of gliding and nanocracks during high-voltage cycling. As a result, the SNCM cathode with a Y2O3 surface and Al doping shows a high specific discharge capacity of 210.5 mAh·g–1 at 1 C within 2.75–4.4 V and a capacity retention of 86.6% after 100 cycles. This study offers a new insight into the design of a strain-retardant method for obtaining single-crystalline Ni-rich cathode materials with high performance.
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高影响因子
CATALYSIS LETTERS
·
2026
·Vol. 156
·期 2
·55
·
IF 2.4
Yu Yang,Song Xuefeng,Su Wenli,Jing Wenjiang,Fan Yu
To meet aviation decarbonization targets, efficient catalysts for bio-jet fuel are needed. Hydrodeoxygenation (HDO) is an indispensable step in converting lipid feedstocks to jet-range hydrocarbons, which critically depends on the pore architecture, acidity distribution and metal dispersion of the catalysts. In this work, a layered SAPO-11 (LS) molecular sieve was synthesized using the polyamine surfactant (C 22 H 45 -N(CH 3 )-C 6 H 12 -N(CH 3 ) 2 ) as a micro-mesopore-directing agent. Ni species were introduced to obtain a series of Ni x /LS catalysts with the Ni loadings of x wt% ( x = 3.0, 6.0, and 9.0), in which Ni 6 /LS exhibited the best HDO performance. Using methyl laurate (ML) as a model feedstock, at the optimized conditions of 360 °C, 2.0 MPa and a weight hourly space velocity (WHSV) of 6.0 h − 1 , the Ni 6 /LS catalyst had the 99.6% conversion of ML with the 97.3% selectivity toward C 11 -C 12 alkanes, surpassing the conventional Ni 6 /microporous SAPO-11 (Ni 6 /MS) catalyst and the literature-reported catalysts. The superior lipid HDO performance of Ni 6 /LS was attributed that the layered architecture of LS provided a larger specific surface area and more mesoporous channels than MS, greatly promoting the high dispersion of Ni species. Graphical
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Jiemin Han,Yifei Ma,Mei Wang,Zhaomin Tong,Jonghwan Suhr,Liantuan Xiao,Suotang Jia,Xuyuan Chen
Black coatings benefit from low reflectance or high light absorption are utilized in multifarious optical applications. Due to their unique three-dimensional nanostructure and π-band optical transitions, vertical graphene (VG) has drawn great attention to the field of black coatings. However, how the morphology of VGs affects reflectance has not been comprehensively disclosed yet. In addition, the morphology of the substrate for VG growth also affects the absorption properties. Here, we report a nano-and micro-engineered VG/Ni structure based on VG and laser-modified nickel foil, which possesses omnidirectional low reflectance of ∼0.25% over the visible range. A larger spacing of graphene nanowalls is more conducive to the formation of light traps and improves the absorption property. Besides, the surface of nickel substrate by laser irradiation presents a “cauliflower-like” microstructure, which further enhances light-trapping ability.
研究领域:
材料科学
·
光学工程
·
纳米技术
·
表面工程
·
功能涂层
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Yu Zhou,Wenjun Zhou,Chunhua Ni,Shenggang Yan,Liangmin Yu,Xia Li
Precursors of a nickel-based metal–organic framework, denoted Ni-MOF, and the loofah plant were prepared by the microwave method, and “tree blossom” Ni/Nitrogen doped Carbon (NC)/ Carbon (C) composites were prepared by in situ pyrolysis under an argon atmosphere. During pyrolysis, the morphology, specific surface area, porous structure and electromagnetic parameters of the Ni/NC/C composites were adjusted by adjusting the pyrolysis temperature. The maximum reflection loss of the corresponding Ni/NC/C composites can reach −63.1 dB at 13.84 GHz and a thickness of 2 mm when the pyrolysis temperature was 650 ℃ and the filling amount was 16 wt%. And the effective absorption bandwidth was 35.44 GHz when the thickness was adjusted from 1 mm to 5.5 mm within the range of 2–40 GHz. Excellent performance comes from conduction loss, dipole and interface polarization, magnetic resonance, multiple electromagnetic reflections and scattering, and equilibrium impedance matching.
研究领域:
材料科学
·
纳米复合材料
·
电磁功能材料
·
能源材料
·
环境功能材料
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WATER SCIENCE AND TECHNOLOGY
·
2021
·Vol. 84
·期 3
·512-523
·
IF 1.915
Li Dan,Zhang Libao,Gao Weichun,Meng Jing,Guan Yinyan,Liang Jiyan,Shen Xinjun
Antibiotic residues may be very harmful in aquatic environments, because of limited treatment efficiency of traditional treatment methods. An electrochemical system with a Ti-based SnO 2 –Sb–Ni anode was developed to degrade a typical antibiotic chloramphenicol (CAP) in water. The electrode was prepared using a sol–gel method. The performance of electrode materials, impact factors and dynamic characteristics were evaluated. The Ti-based SnO 2 –Sb–Ni electrode was compact and uniform as shown by characterization using SEM and XRD. The electrocatalytic oxidation of CAP was carried out in a single-chamber reactor by using a Ti-based SnO 2 –Sb–Ni electrode. For 100 mg L −1 CAP, the CAP removal ratio of 100% and the TOC removal ratio of 60% were obtained at the current density of 20 mA cm −2 and in a neutral electrolyte at 300 min. Kinetic investigation has shown that the electro-oxidation of CAP on a Ti-based SnO 2 –Sb–Ni electrode displayed a pseudo-first-order kinetic model. Free radical quenching experiments presented that the oxidation of CAP on Ti-based SnO 2 –Sb–Ni electrode resulted from the synergistic effect of direct oxidation and indirect oxidation (·OH and ·SO 4 − ). Doping Ni on the Ti/SnO 2 –Sb electrode for CAP degradation was presented in this paper, showing its great application potential in the area of antibiotic and halogenated organic pollutant degradation. Ti/SnO 2 –Sb–Ni anodes were first applied to remove CAP by electrocatalytic oxidation. The removal ratios of CAP and TOC by anodic oxidation and cathodic reduction were first compared. The degradation of CAP on the Ti/SnO 2 –Sb–Ni electrode results from the synergistic effect of direct oxidation and indirect oxidation (·OH and ·SO 4 − ). ·SO 4 − and direct oxidation contributed much to the degradation of CAP.
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Journal of Cleaner Production
·
2026
·
IF 10.7
Ting Wang,Haiyan Wu,Yili Wang,Yuansong Wei,Dunqiu Wang,Haixiang Li,Yufeng Xu,Libing Zheng
Industrial nickel pollution discharged into water bodies poses a serious threat to the environment and human health. Conventional biochar-based adsorbents suffer from poor mechanical strength, restricting large-scale application. Inspired by reinforced concrete, this study synthesized a high-strength hydroxyapatite nanowire (HANW) enhanced biochar hybrid aerogel (HBA). HANWs served as the reinforcing framework, while the MgCl 2 -modified biochar matrix provided abundant adsorption sites, synergistically boosting mechanical strength and adsorption capacity. The optimized HBA exhibited 47% higher compressive strength than conventional biochar aerogels and a notable Ni(II) adsorption capacity of 300.65 mg/g, which is 4 times more effective than conventional biochar. Comprehensive characterization confirmed Ni(II) adsorption on HBA follows a synergistic physicochemical process involving ion exchange, surface complexation, surface sedimentation, electrostatic interaction, and pore diffusion. The HANW-reinforced porous architecture not only sustains this multi-mechanistic pathway but also preserves high mass-transfer efficiency and structural stability during successive adsorption cycles. HBA further exhibited strong selectivity toward Ni(II) under competitive conditions, achieving 99.7% simultaneous removal of Ni in actual electroplating wastewater. The reinforced-concrete-like architecture offers new insights for the design of durable, recyclable, and scalable materials for heavy-metal-contaminated wastewater remediation. Download: Download high-res image (414KB) Download: Download full-size image
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