APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Zengkun You,Kai Ou,Tian Tang,Yajing Cui,Wenting Zhang,Yuxiang Ni,Yudong Xia,Hongyan Wang
Under the background of sustainable energy development, the development of efficient, stable and low-cost electrocatalysts to improve electrochemical performance has become a research hotspot in the field of energy conversion. In this work, upright, one-fold and oblique Ni nanorods were designed and grown on Ti 3 C 2 T x MXene nanosheets via glancing angle deposition technique of physical vapor deposition. For the hydrogen evolution reaction, the composite Ti 3 C 2 T x @upright exhibited a low overpotential of only 131 mV@10 mA/cm 2 , along with excellent 24 h stability in 1 M KOH. Its excellent performance is mainly attributed to the high porosity of the upright nanorods, the fast electron transport channels provided by Ti 3 C 2 T x MXene, and the stable interface structure. This research provides new ideas for constructing high-performance electrocatalytic catalysts and achieving efficient electrocatalytic conversion in sustainable energy systems.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
·
IF 8.3
Mingzhe Li,Yunlong Wang,Xin Zhang,Lei Zhou,Fengchun Zheng,Kepi Chen,Nian Ran,Yuzhen Lv,Wei Zhou
Developing iron-free transition-metal based catalysts to overcome ion-leaching degradation is still a critical challenge due to their inherent low activity and poor electron transfer characteristics for oxygen evolution reaction (OER). Herein, an iron-free catalytic material integrating amorphous Ce-doped NiOOH with Ni nanocrystals was synthesized via a one-step electrodeposition method, achieving scalable fabrication of a uniform anode over 600 cm 2 . It shows remarkably low overpotentials of 190 mV and 332 mV to achieve 10 and 1000 mA cm −2 in 1 M KOH, respectively. Moreover, it maintains 98.7 % activity retention after 1000 h of continuous operation at 1000 mA cm −2 . XPS, XANES, in-situ Raman spectroscopy and density functional theory (DFT) calculations demonstrate that Ni nanocrystals significantly enhance the interfacial and bulk charge transport in NiOOH, while Ce doping substantially promotes both the pre-oxidation process and OER kinetics. This work provides insights for designing iron-free catalytic materials with high alkaline OER performance.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yadi Wang,Jingang Zhao,Taoyang Zou,Yuekun Jing,Yixuan Song,Guanchao Wang,Fang Liu,Guofei Jiang
In order to address the issue of air pollution caused by the volatilization of VOCs in oilfield mud storage tanks and further reduce the energy consumption associated with traditional thermal oxidation technology, this study employs a photothermal synergistic catalytic oxidation method for the treatment of oilfield VOCs. A series of Ni/α-MnO 2 catalysts doped with varying nickel contents were synthesized via the hydrothermal method using transition metals, with propane selected as the representative pollutant. The incorporation of nickel enhances the adsorption capacity of O 2 to a certain extent. Simultaneously, it increases the competitive adsorption intensity of O 2 in the presence of coexisting H 2 O and O 2 , thereby exhibiting superior catalytic oxidation performance for propane. Compared to the single-component α-MnO 2 material (T 90 = 228 °C), the 40 %Ni/α-MnO 2 composite catalytic material showed excellent degradation ability for propane (T 90 = 206 °C) and good long-term stability. Furthermore, based on density functional theory (DFT) calculations, a plausible mechanism for propane removal was proposed. Consequently, this study offers novel insights into the design and synthesis of efficient catalysts and the degradation of VOCs.
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Protection of Metals and Physical Chemistry of Surfaces
·
2026
·Vol. 61
·期 6
·1374-1385
·
IF 1.1
Tianle Li,Shuai Wang,Yongchao Huo,Guoying Geng,Wenxiu Qiu,Chunling Li,Shuangqing Sun
Ni–P–MoS 2 composite coatings often suffer from reduced corrosion resistance despite their excellent lubricating properties. To address this limitation, this study developed a novel Ni–P–MoS 2 –PTFE composite coating via electrodeposition, incorporating hydrophilic-modified MoS 2 nanosheets and oxidized PTFE particles to enhance co-deposition and dispersion. Electrochemical tests, salt spray exposure, and mechanical characterization demonstrated significantly improved properties. The optimized coating with 3 g L –1 PTFE exhibited superior corrosion resistance, showing a maximum electrochemical impedance of 118 300 Ω cm 2 after 20 days of salt spray testing. It also displayed excellent mechanical performance with a Vickers hardness of 774.4 HV and a low friction coefficient of 0.1128. The synergistic effect of PTFE and MoS 2 effectively densified the coating structure, providing enhanced barrier protection and lubrication. This work offers a practical strategy for designing high-performance anti-corrosion and wear-resistant coatings suitable for demanding industrial environments.
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Materials Today Nano
·
2026
·
IF 7.6
Xinyu Yin,Xin Zhang,Jin Li,Wenjun Chu,Wen Xie,Jiaping Hu,Lulu Tang,Qin-Xin Luo,Han-Shu Xu
The development of highly sensitive electrochemical sensors for rapid and accurate quantification of hydrogen peroxide (H 2 O 2 ) is of great significance in biological, clinical, and various other fields. However, there remains insufficient understanding of how to optimize material structures to enhance sensing performance and the mechanisms by which physical parameter regulation influences sensing properties. In this work, we report the growth of micron-scale, Ni-substituted needle-shaped ZnO arrays on a flexible interdigitated electrode substrate, achieved through the initial synthesis of a nanostructured ZnO seed layer. Electrochemical experiments revealed that Ni-substituted ZnO exhibits superior H 2 O 2 sensing performance compared to needle-shaped ZnO arrays and the ZnO seed layer. The incorporation of Ni significantly reduces the resistivity, increases the specific surface area, and enhances the adsorption of oxygen species. Importantly, we employed multiple physical parameters, including magnetic field, UV illumination, and mechanical strain, to regulate the H 2 O 2 sensing performance of Ni-substituted ZnO, and clarified the underlying physical mechanisms behind these regulations. In short, our ZnO-based flexible materials provide a promising approach for non-invasive, real-time H 2 O 2 monitoring, holding strong potential for wearable medical devices and point-of-care applications.
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MATERIALS RESEARCH BULLETIN
·
2026
·
IF 5.8
Yao Han,Liang Yang,Xiangyi Luo,Shan Huang,Ting Yu,Yaohui Qu,Cailei Yuan,Manman Guo
Transition metals and carbides have attracted significant attention as electrocatalysts owing to their high electrical conductivity and strong hydrogen-binding affinity, which was also hindered by limited exposure of active sites and instability. Herein, we report a confined heterostructured catalyst—Ni/Mo 2 C nanoparticles embedded in a porous nitrogen-doped carbon sheets (PNCS)—constructed via the sol–gel synthesis with high-temperature annealing. The interfacial coupling between Ni and Mo 2 C modulated the electronic structure and facilitated faster charge transfer, while the PNCS stabilized the active sites by suppressing nanoparticle agglomeration. Alkaline HER measurements revealed that the Ni/Mo 2 C@PNCS (2:3) catalyst operated with merely 114 mV overpotential to reach 10 mA cm –2 with a Tafel slope of 63 mV dec –1 , indicating outstanding activity, and maintained robust stability over 100 hours of continuous operation. This work provided a viable strategy for engineering confined TM/TMC heterostructures and offers new insights into designing high-performance non-noble metal-based HER catalysts through interface-driven electronic modulation.
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Dianwei Liu,Pengfei Yan,Wei Liu,Qun Xu,Buxing Han
Developing high-efficiency electromagnetic wave (EMW) absorbers for the low frequency (1–8 GHz) remains a formidable challenge, primarily due to the inherent conflict between thickness reduction and impedance matching at longer wavelengths. Herein, we propose a supercritical CO 2 (SC CO 2 ) fluid-assisted interfacial engineering strategy to construct a hierarchical “core-shell-satellite” carbon nanotube/polyaniline/nickel (CNT/PANI/Ni) ternary composite. Unlike conventional liquid-phase methods that suffer from phase agglomeration, the gas-like diffusivity and negligible surface tension of SC CO 2 facilitate the uniform encapsulation of PANI on CNTs and the atomic-scale anchoring of Ni nanoparticles via robust Ni-N coordination bonds. This unique architecture effectively moderates the conductivity of the CNT network to optimize impedance matching, while the abundant heterogeneous interfaces (CNT/PANI and PANI/Ni) induce significant Maxwell-Wagner-Sillars (MWS) polarization and dipole relaxation losses. Consequently, the optimized CNT/PANI/Ni composite exhibits exceptional low-frequency absorption performance, achieving a minimum reflection loss (RL min ) of −57.11 dB at 6.47 GHz with a matching thickness of only 3.5 mm, overcoming the “thickness bottleneck” of low-frequency absorbers. This work not only provides a scalable route for fabricating heterogeneous composites but also unravels the mechanism of SC CO 2 -induced interfacial synergy, offering a robust solution for anti-interference in 5G and satellite communications.
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JOURNAL OF RARE EARTHS
·
2026
·
IF 9.6
Jiashuo Lv,Liming Xu,Fan Zhang,Danqin Li,Jie Li,Yufei Hu,Wenjing Zhou,Meisi Yu,Furui Lin,Jian Hou,Weiqiang Zhou
Nickel-based catalysts are attractive for methanol oxidation owing to their structural tunability and intrinsic activity for C–H bond activation. However, their limited ability to capture OH – at the reaction interface results in reduced energy-conversion efficiency. In this work, we demonstrate that La-Ni(OH) 2 /graphene oxide (GO) delivers a multilevel synergistic optimization that markedly enhances photoelectrochemical methanol oxidation. The random doping of La disturbs the periodicity of Ni–O lattice, which promotes surface reconstruction and the enrichment of OH – at the electrified interface. Notably, La doping-induced oxygen vacancies act as charge-trapping sites, promoting the separation of photogenerated electron-hole pairs. More photogenerated holes can reach the reaction interface and participate in oxidation, synergistically enhancing the photoelectrocatalytic efficiency. By optimizing the interfacial microenvironment, the La-Ni(OH) 2 /GO catalyst achieves a current density of 179.8 mA/cm 2 in alkaline medium and increases to 222.6 mA/cm 2 under illumination.
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Journal of Energy Chemistry
·
2026
·
IF 15.6
Shi-Min Li,Gui-ming Wu,Jun-Fei Shen,Lin-Zhi Chen,Na Tian,Chang Wang,Hai-Wei Liang,Zhi-You Zhou,Shi-Gang Sun
The construction of ordered Pt-based intermetallic compounds (IMCs) has emerged as an effective approach to improve the activity and durability of catalysts for the oxygen reduction reaction. However, the synthesis, especially for Pt-Ni IMCs, is often hindered by their low disorder-order phase transformation temperatures ( T PT ). Here, we report a general synthetic strategy by introducing transition metals (M = Ti, V, Cr, Mn, and Fe) capable of forming high- T PT (≥1000 °C) PtM IMCs, which can effectively elevate the T PT of Pt 3 Ni and PtNi alloys and promote their ordering degree. In situ high-temperature X-ray diffraction (HT-XRD) results confirm that Ti doping greatly increases the T PT of Pt 3 Ni from 490 to over 800 °C, enabling the formation of the ordered IMCs. The optimized Pt 3 Ni 0.7 Ti 0.3 catalyst achieves mass activity and specific activity of 1.35 A mg Pt −1 and 1.78 mA cm −2 , respectively, higher than those of Pt/C and Pt 3 Ni, while holding high stability. This work establishes a broadly applicable strategy for the synthesis of Pt-based IMCs, offering a pathway to durable, high-performance fuel-cell catalysts.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2026
·
IF 4.1
Gao Haonan,Wen Mingzhen,Li Jiali,Hou Shili,Li Lifen,Liu Guangyan
This work develops an in situ electrodeposition strategy to construct a honeycomb-like Ni/Co-MOF/MXene heterojunction directly on the glassy carbon electrode (GCE) surface at −1.3 V vs. Ag/AgCl, enabling ultrasensitive enzymatic electrochemical detection of trace urea. The high catalytic activity of Ni/Co-MOF and the superior conductivity of MXene were synergistically integrated in a 3D hierarchical heterostructure. Compared with traditional modification methods, this strategy significantly enhances the kinetics of electron transfer and the stability of urease immobilization. Characterized by scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS), the heterojunction exhibits unique morphology and outstanding electroconductivity. Furthermore, the resulting Ni/Co-MOF/MXene/urease/GCE biosensor achieves a wide linear range of 1.0 × 10 –6 –1.0 × 10 –4 mol L −1 with a low detection limit of 4.9 × 10 –7 mol L −1 . The biosensor has been applied to the detection of practical samples, where the recoveries were 99.3–102.8% with a relative standard deviation (RSD) of 2.9–3.3%, which indicates that this biosensor has good practical applications and prospects for further development.
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PubMed
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JOURNAL OF CATALYSIS
·
2026
·
IF 6
Anqiu Liu,Zhihua Zhu,Siwei Xu,Peng Zhou,Zehui Zhang
Great efforts have been devoted to designing novel catalysts for the chemo-selective hydrogenation of nitroarenes into amines. Herein, we reported that the interfacial structure between defective V 2 O 3 and metallic Ni nanoparticles was crucial in the chemo-selective hydrogenation of 4-nitrostyrene and other functional nitroarenes under mild conditions (80 °C, 1.5 MPa H 2 ), affording the corresponding amines with excellent yields. Generally, the defective sites in metal oxides of metal oxide/metal nanoparticle interface were responsible for the chemo-selective hydrogenation of nitroarenes via the selective adsorption of the nitro group. However, our mechanistic study revealed that the oxygen-defective Ni-V 2 O 3 interface was the active site, and nitroarenes preferred to adsorb on Ni. Theoretical calculation results revealed that defective sites in V 2 O 3 effectively turned the electron density of metallic Ni to chemo-selective adsorption of the nitro group by reducing electron transfer from metallic Ni to defective V 2 O 3 . In this case, defective sites in V 2 O 3 also boost the electron transfer from metallic Ni to nitro group, significantly lowering the energy barrier for the hydrogenation of nitro group. This work provides a novel method for the non-noble metal catalyzed chemo-selective hydrogenation of nitroarenes by finely tuning the electron effects of metallic sites the interfacial defective metal oxides sites.
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International Journal of Applied Ceramic Technology
·
2026
·Vol. 23
·期 3
·e70215
·
IF 2.6
Yu Fu,Sheng Jiang,Biao Wu,Xiaoli Deng,Xiaochun Wang
Ceramic metallization provides an effective insulation strategy for reversible solid oxide cell (RSOC) pipeline connections that are prone to side short-circuiting. In this work, 95 wt.% Al 2 O 3 ceramics were metallized by the activated Mo–Mn method, and 15 metallization formulations with different Mo, MnO, Al 2 O 3 , and SiO 2 contents were designed to optimize the microstructure, phase composition, and bonding strength of the metallized layer. The results show that, after sintering at 1400°C for 1 h, the optimal formulation consists of 70 wt.% Mo, 9 wt.% MnO, 6.3 wt.% Al 2 O 3 , and 14.7 wt.% SiO 2 . Under this condition, the Mo skeleton is continuous, the activator melt forms a glassy phase, and a reliable transition layer is developed at the ceramic/metallization interface, yielding a shear strength of 146.3 MPa. Electroless Ni–P post-plating on the optimized metallized surface produces a dense and continuous coating with typical nodular morphology and an average thickness of about 15–17 µm. The plated layer exhibits a relatively uniform hardness of 382.84 HV and maintains good structural integrity after 300 thermal-shock cycles, demonstrating promising potential for RSOC-related ceramic-to-metal insulating connection components.
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