JOURNAL OF ALLOYS AND COMPOUNDS
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2026
·
IF 6.7
Shuang Li,Mengli Yan,Chenguang Yang,Chunyu Yang,Jianwang He,Yan Xu
Large-scale utilization of hydrogen for fuel cells and chemical manufacturing imposes urgent demands on hydrogen sensing materials with superior sensitivity and selectivity. Herein, we successfully fabricated a Ni-BTC@ZIF-8 MOF-on-MOF heterostructure using polyvinylpyrrolidone (PVP) as a stabilizer and bridging agent. The hierarchical porous architecture enables size-selective microporous sieving in the outer ZIF-8 layer, facilitating H 2 permeation while blocking larger interfering molecules. This selective mass transfer optimizes H 2 accessibility at the sensing interface. Owing to the favorable mass-transport behaviour, the Ni-BTC@ZIF-8 sensor delivers an ultrahigh selectivity with a response value of 6.0 toward 20 ppm H 2 at 200 ℃, alongside an exceptionally fast recovery speed (∼6 s). Moreover, the device demonstrates excellent cycling stability and long-term reliability. This work further probes the underlying mechanism responsible for the improved H 2 -sensing performance of the MOF-on-MOF heterostructure, which arises from interfacial synergistic effects. Specifically, the intimate ZIF-8/Ni-BTC contact affords selective gas-transport channels from ZIF-8 and efficient electron-conduction pathways, with Ni-BTC serving as the active sensing layer for signal transduction. Such a synergistic interplay optimizes the coupling between molecular-sieving and sensing response. These findings provide a feasible and scalable paradigm for constructing novel high-performance hydrogen gas sensors.
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ChemPlusChem
·
2026
·Vol. 91
·期 8
·e70223
·
IF 3.1
Huan V Doan,Huong T T Tran,Duyen T Le,Xuan N Pham
In this study, a novel Ni–MoO 3 @MIL‐101(Cr) composite catalyst was synthesized via a one‐step hydrothermal method for the oxidative desulfurization (ODS) of dibenzothiophene (DBT). The catalyst combines the high specific surface area of MIL‐101(Cr) with the redox properties of Ni–MoO 3 , providing an effective synergy between adsorption and catalytic oxidation. The incorporation of Ni as a promoter significantly enhances catalytic activity, enabling complete sulfur removal (∼100%) under mild conditions (50 °C) within 60 min. Structural characterizations (scanning electron microscopy, X‐ray diffraction, and SAED) reveal that the catalyst retains its nanosheet–nanorod morphology and crystalline MoO 3 phase after repeated use, with only a slight decrease in the crystallinity of the MIL‐101(Cr) framework. Mechanistic analyses using X‐ray photoelectron spectroscopy, Raman, and temperature‐programmed reduction demonstrate that surface oxygen vacancies and Lewis acid sites promote ODS activity, while highly dispersed Ni–MoO 3 species facilitate H 2 O 2 activation and Mo 6+ /Mo 5+ redox cycling, leading to efficient generation of reactive oxygen species. The catalyst also exhibits excellent stability, maintaining 98.7% DBT conversion after five cycles. These results demonstrate that the strong Ni–Mo synergistic effect and efficient oxygen activation make Ni–MoO 3 @MIL‐101(Cr) a robust and highly efficient catalyst for deep fuel desulfurization. This study presents a significant advancement in the field of oxidative desulfurization by developing a synergistic Ni–MoO 3 redox catalytic system confined within the porous MIL‐101(Cr) framework. Unlike conventional catalysts, the designed material effectively enhances H 2 O 2 activation through cooperative interactions between Ni and Mo species, enabling rapid and ultra‐deep removal of refractory sulfur compounds under mild conditions. The integration of redox‐active sites with a high‐surface‐area MOF support not only improves catalytic efficiency but also ensures excellent stability and recyclability. This work provides new insights into the rational design of bimetallic catalysts for green fuel purification and offers a promising strategy for achieving sustainable and energy‐efficient desulfurization processes.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2026
·
IF 4.4
Tingyang Ming,Miao Hu,Wei Zhu
Non-equilibrium adsorption contributes to post-illumination TC removal. • Bi 2 WO 6 /Ni(OH) 2 shows enhanced adsorption and photocatalytic kinetics. • Charge storage is unlikely to dominate the dark-stage behavior. • Acid extraction reveals adsorption-related surface retention of TC. • Light-off timing supports adsorption relaxation after photocatalysis. The photocatalytic removal of antibiotic pollutants has been widely investigated for water purification, where continued pollutant decay after light irradiation (“dark-stage removal”) represents an intriguing post-illumination phenomenon in photocatalytic systems. Although charge storage provides an important explanation for post-illumination activity, adsorption relaxation after light-off may also contribute to dark-stage removal. In this work, a Ni(OH) 2 -modified Bi 2 WO 6 system was employed as a representative model to investigate non-equilibrium adsorption in photocatalytic dark-stage tetracycline removal. The photocatalytic performance under visible light was first evaluated to establish a high-activity reaction system. Subsequently, a combination of acid extraction, solution–surface distribution analysis, and charge probing experiments was used to clarify the contributions of adsorption redistribution and charge storage. The results demonstrate that charge storage is negligible and unlikely to dominate the dark-stage behavior in the Bi 2 WO 6 /Ni(OH) 2 system. Instead, the apparent dark-stage removal is primarily governed by a non-equilibrium adsorption process, arising from the imbalance between rapid photocatalytic consumption and adsorption–desorption dynamics during illumination. After light-off, the system gradually relaxes toward equilibrium, leading to continued redistribution of tetracycline from the solution to the catalyst surface. This work reveals a photocatalysis-induced non-equilibrium adsorption pathway for dark-stage removal, providing a complementary perspective for understanding post-illumination behavior in photocatalytic systems. Download: Download high-res image (181KB) Download: Download full-size image
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2026
·
IF 4.6
Yuhang Zhang,Wencai Huang,Xi Chen,Zirui Ren,Yuqing Song,Xiandong He,Yang Xia,Xiaoxiao Lu
NCM811 cathode is surface modified by PTh and CNTs. • PTh/CNTs co-modification boosts electrochemistry and thermal stability. • The co-modified sample achieves 86.8% capacity retention after 500 cycles at 1C. • Conjugated electron-rich PTh captures ROS; CNTs build conductive network. The practical use of Ni-rich cathodes is limited by interfacial instability from reactive oxygen species, poor conductivity, and structural degradation. Polythiophene (PTh) is capable of scavenging reactive oxygen species (ROS); however, its electrical conductivity is insufficient to meet the demands of high-rate applications. To enhance the high-rate performance, a hybrid modification layer composed of PTh and carbon nanotubes (CNTs) has been introduced onto LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) via a straightforward wet-chemical method. Morphological and surface investigations confirm that PTh uniformly coats the cathode surface, while CNTs are entangled on the surface of the secondary particles to form a robust conductive network. Electrochemical results demonstrate that PTh effectively shields the cathode from electrolyte degradation, suppresses lattice contraction after prolonged cycling, and scavenges ROS, whereas CNTs significantly enhance electrical conductivity. The optimized CP-NCM811 cathode delivers an initial discharge capacity of 184.5 mAh g −1 at 1C and retains 86.8% of its capacity after 500 cycles. Furthermore, it displays an outstanding rate performance of 161.6 mAh g −1 at 10C. The enhanced electrochemical and thermal stability arises from the synergistic effects of ROS scavenging by PTh, suppression of irreversible lattice contraction, and reduction of charge-transfer impedance facilitated by the CNT conductive network. Differential scanning calorimetry further reveals that the modified cathode exhibits a delayed exothermic onset temperature, indicating superior thermal stability. This study offers a novel and efficient strategy for enhancing the electrochemical and thermal performances of high-capacity cathodes through the synergistic co-modification of PTh and CNTs. Download: Download high-res image (186KB) Download: Download full-size image
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Materials Today
·
2026
·
IF 24.1
Zhongzheng Yao,He Zhu,Yu Lou,Fan Xue,Jingqian Huang,Hua Ji,Wei-Di Liu,Xindong Zhu,Sinan Liu,Jianrong Zeng,Yang Ren,Xun-Li Wang,Yang Lu,Si Lan
Metallic glasses (MGs), despite exhibiting superior electrochemical catalytic and sensing activity to crystalline solids, remain difficult to rationally design because the structural units that directly correlate to active sites are poorly resolved. Here, we address this challenge by showing that a small change in Ni content (±4 at%) in Ni-Mo-P-B MGs gives precise control of short‑range-ordered (SRO) polyhedral motifs and their medium‑range connections. Synchrotron X-ray analysis reveals that the Ni 64 Mo 16 P 16 B 4 (Ni 64 ) stabilizes ten-coordinated (Z10) bi-capped square archimedean antiprisms (BSAPs) as the dominant SRO polyhedral, whereas Ni 60 Mo 20 P 16 B 4 (Ni 60 ) and Ni 68 Mo 12 P 16 B 4 (Ni 68 ) are dominated by nine-coordinate (Z9) tricapped trigonal prisms (TTPs). Crucially, this engineered SRO dramatically enhances the electrochemical glucose sensing: Ni 64 delivers ultrahigh sensitivity, a wide linear range, and stable operation over seven days, whose performance is far superior to conventional crystalline probes. First-principles calculations reveal that only at a Ni/Mo ratio of 4 does short-range chemical ordering favor the highly symmetric Z10 BSAPs with two Mo atoms occupying the two polyhedral caps. These Mo‑capped Z10 clusters optimally modulate Mo-Ni electronic interactions, lowering the *OH adsorption barrier and boosting catalytic reactivity. A miniaturized glucose sensor was fabricated by integrated the MG with a screen-printed electrode, demonstrating the practical applicability. Notably, we found that the dominant polyhedra show homology to local building blocks of nearby crystalline phases, suggesting that amorphous structures inherit crystal-like motifs that govern both stability and properties. Our work establishes an atomic-scale structural engineering paradigm for MG design, bridging crystalline-amorphous structural homology with functional optimization, and deepening the understanding of structure–property correlations in MG systems.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Zhenyu Tian,Yan Liu,Wanfeng Zhu,Shiji Wang,Wenjia Li
Metal-supported solid oxide fuel cells (MS-SOFCs) are recognized as a critical pathway toward high-efficiency energy conversion and global sustainable development, owing to high mechanical robustness, low cost. However, MS-SOFCs are still limited by gas diffusion. To address this challenge, this study proposes an open graded-pore structure Ni-Fe (GP-NF) support fabricated via a double layer tape casting with a phase inversion process. A Ni-Fe layer is cast onto a graphite sacrificial layer. Through a dynamic solvent/non-solvent exchange process, a graded-pore structure consisting of a skin layer and finger-like pore layer is formed within the Ni-Fe support layer, while the sponge pore layer is generated within the graphite sacrificial layer. Subsequently, the graphite sacrificial layer beneath the Ni-Fe layer decomposes at high temperatures, thereby directly exposing the finger-like pore to air and forming the GP-NF support. The GP-NF support exhibits a high porosity of 53.2%. The polarization resistance ( R p ) of the GP-NF support SOFC is 0.21 Ω·cm 2 , which is 19.2% lower than that of a conventional single-layer tape casting Ni-Fe support (NF, 0.26 Ω·cm 2 ) SOFC. Therefore, the GP-NF support SOFC achieves a peak power density of 1.05 W·cm -2 at 800°C, representing a 72.1% enhancement over the NF support SOFC (0.61 W·cm -2 ). This work demonstrates an improvement in gas transport through strategic structural design, providing a feasible pathway for developing high-performance, highly reliable, and cost-effective MS-SOFCs.
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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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ACS Catalysis
·
2026
·
IF 13.6
Jiaqing Liu,Xiaoqing Liu,Jiacheng Zhang,Zheng Liang,Wei Lin,Xue Feng Lu
Achieving high current densities with nickel-based catalysts within the urea oxidation reaction (UOR) potential window is critical for the scalable implementation of urea electrolysis. However, their performance is limited by the high energy barriers of Ni2+ deprotonation and sluggish proton-coupled electron transfer (PCET) processes. Herein, ultrafine PtNi-Ni nanoparticles rooted on porous TiO2 (PtNi-Ni/TiO2) nanotubes are constructed by a facile surface segregation and galvanic replacement reaction. The obtained PtNi-Ni/TiO2 electrocatalysts deliver the highest UOR current density of 284.4 mA cm–2 at a low potential of 1.50 V, ranking among the top UOR electrocatalysts reported. Kinetic analysis and theoretical calculations reveal that alloying significantly reduces the free energy for the Ni2+ electrooxidation, while heterojunction engineering promotes the PCET process and weakens the strong adsorption of urea, thereby improving the UOR current density. Moreover, PtNi-Ni/TiO2 delivered hydrogen evolution activity, enabling a urea electrolyzer employing PtNi-Ni/TiO2 as both anode and cathode to achieve 50 mA cm–2 at a low cell voltage of 1.55 V, which reduces the energy consumption by 17.2% compared with water splitting systems. This study provides a fundamental paradigm and insights for designing advanced nickel-based electrocatalysts for urea-splitting systems.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2026
·
IF 4.6
Mingzhu Lv,Wenbin Wei,Zhen Du,Ning Liu,Yina Qiao,Jing Lu,Pengxiao Liu
Prussian blue analogs (PBAs) have attracted significant attention in the field of capacitive deionization (CDI) due to their unique open-framework structure and excellent ion storage capacity. However, their limited capacity and poor cycle stability have restricted their practical applications. In this study, a series of ternary nickel‑cobalt‑copper Prussian blue analogs (NiCoCu-PBA) was synthesized via a co-precipitation method by introducing Ni, Co, and Cu metal ions, which significantly enhanced the material's conductivity, reversible redox activity, and structural stability. The optimized NiCo 2 Cu 8 -PBA electrode exhibited an excellent specific capacitance of 185 F g −1 at a current density of 0.2 A g −1 . In the rocking-chair electrochemical desalination system, the electrode achieved a desalination capacity of 79.71 mg g −1 in a 600 mg L −1 NaCl solution, maintaining a rapid desalination rate of 2.8 mg g −1 min −1 and low energy consumption of 0.589 Wh g −1 . Additionally, the electrode demonstrated excellent long-term stability, retaining 92% of its initial capacity after 200 cycles. This study confirms that the synergistic effect of the ternary metals plays a key role in enhancing the performance of PBA electrodes and provides technical support for the development of efficient and durable desalination systems.
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JOURNAL OF RARE EARTHS
·
2026
·
IF 9.6
Huijie Wang,Dedong He,Jichang Lu,Yu Zhang,Jiangping Liu,Xiaohua Cao,Zhizhi Xu,Shaowei Zhang,Dingkai Chen,Yongming Luo
Enhancing the sluggish kinetics of the CO 2 reduction reaction (CO 2 RR) is crucial for the efficient CO 2 -to-CO conversion in solid oxide electrolysis cells. Herein, a dual-exsolution strategy is reported to simultaneously anchor Co and Ni nanoparticles onto distinct La 0.6 Sr 0.4 Co 0.7 Mn 0.3 O 3– δ (LSCM) perovskite phase and Ce 0.9 Ni 0.1 O 2– δ (CNO) fluorite phase, respectively. This design activates both electronic and ionic conduction pathways. The resulting cathode achieves a remarkable CO 2 electrolysis current density of 1.48 A/cm 2 at 1.5 V and 800 °C, representing a 54% enhancement over its non-exsolved counterpart and exhibits stable operation for 100 h. Combined experimental and theoretical analyses reveal that the synergistic Co-Ni bimetallic sites, along with abundant oxygen vacancies, cooperatively enhance CO 2 adsorption and dissociation. Density functional theory calculations provide insights into the intrinsic activity of the newly formed Co@LSCM and Ni@CNO heterointerfaces. This work provides a promising route for designing high-performance composite electrodes via dual-phase engineering.
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