INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2024
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IF 3.8
Bingbing He,Qinyuan Wang,Ying Chen,Weifeng Yao
The development of a cost-effective method for synthesizing hydrogen peroxide (H2O2) holds significant importance. Here, we introduce a novel catalyst, a nitrogen-doped carbon-loaded nickel nanoparticle catalyst (Nix NPs@N–C), tailored for efficient H2O2 production via the two-electron oxygen reduction reaction. Benefiting from the synergistic interplay between highly active nickel nanoparticles and nitrogen-doped carbon, the optimal Nix NPs@N–C catalyst demonstrates an outstanding 78% selectivity for H2O2 at 0.5 V vs a reversible hydrogen electrode (RHE), yielding approximately 387 mmol g–1 h–1 in a 0.1 M KOH alkaline solution at 0.3 V vs RHE. With its utilization of cost-effective raw materials, streamlined synthesis method, and exceptional catalytic performance, the Nix NPs@N–C catalyst emerges as a promising candidate for electrocatalytic H2O2 synthesis in practical applications.
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MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Zhiyue Wang,Yaru Wang,Shihong Xin,Xueqing Yong,Qixin Wang,Yunlin Chen
Hydrogen (H 2 ) leakage poses critical safety hazards and environmental risks in clean energy systems, driving urgent demands for cost-effective hydrogen sensors with high sensitivity, high selectivity, and rapid response time. Herein, high-performance hydrogen sensor based on photonic crystals (PCs) assembled by CAU-1, nickel (Ni) -doped CAU-1, and TiO 2 are prepared. Comparing with the CAU-1/TiO 2 and CAU-1Ni 15% /TiO 2 PC sensors, CAU-1Ni 25% /TiO 2 PC sensor shows a high sensitivity of hydrogen response to be 0.083 nm/ppm with a good linear relationship in the concentration range of 9–90 ppm hydrogen. Density-functional theory (DFT) adsorption energy calculations quantitatively validate the enhanced hydrogen adsorption capacity through Ni-induced electronic structure modulation. The CAU-1Ni 25% /TiO 2 PC sensor exhibits an ultrafast optical response time of 3 s and a recovery time of 12 s with exceptional repeatability and reliability. Moreover, the CAU-1Ni 25% /TiO 2 PC sensor displays exceptional selectivity toward H 2 by comparing with CO 2 , NH 3 , and O 2 , which is important for practical hydrogen detection applications. This work presents incorporating Ni into CAU-1 enhances hydrogen adsorption energy through electronic structure modulation, enabling the CAU-1Ni 25% /TiO 2 PC to achieve rapid optical sensing response to hydrogen, which establish a new pathway for developing high-efficiency photonic crystal-based optical hydrogen sensors.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Fang Yuan,Jialin Liang,Shixuan Wang,Jiajia Wang,Bo Chen,Gaofeng Wang,Chunquan Li,Zhiming Sun
Herein, in-situ self-assembly of ZIF-67 derivative on the surface of stilbite and the doping of Ni ions into the Co 3 O 4 lattice were simultaneously achieved through a one-step calcination method. The obtained Ni-doped Co 3 O 4 /stilbite (Ni-Co-AS) exhibited efficient photo-assisted thermal catalytic purification of formaldehyde (HCHO). The results showed that after being regulated by Ni-doped, the Ni-Co-AS composite could achieve efficient photo-assisted thermal catalytic degradation of HCHO driven solely by light. The HCHO removal rate and mineralization rate could reach 93.04 % and 88.60 % within 3 h, respectively. In addition, in order to further improve the photothermal conversion performance of Ni-Co-AS, the composite fiber felt (Ni-Co-AS/F) was prepared from Ni-Co-AS. The conditional experiments show that thermal catalysis is the main mechanism in the photothermal catalytic degradation of formaldehyde by Ni-Co-AS/F. Compared to the pure thermal catalysis (180℃), the presence of light helps to reduce the reaction temperature (120℃) and plays a role in co-catalysis. Ni-Co-AS/F could achieve a higher mineralization rate than that of Ni-Co-AS composite (91.66 %) within 3 h due to the better dispersion and quantum transmission efficiency. In dynamic and long-term degradation experiments, the Ni-Co-AS/F exhibited excellent catalytic performance under the appropriate temperature (35 ± 0.5℃) and humidity (45 ± 3 %) required for the HCHO degradation. This work could effectively provide an efficient and sustainable catalytic material for air pollution control.
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ACS Sustainable Chemistry & Engineering
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2025
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IF 7.3
Yusheng Qiu,Shuzhuang Sun
The activity and selectivity of catalytic reactions are profoundly influenced by metal–support interactions. The strong metal–support interaction (SMSI) plays a critical role in selectively driving the conversion of CO2 toward CO instead of CH4 in Ni-based catalytic systems. Moreover, the dispersion of active species governs the population of accessible reaction sites, thereby enhancing catalytic activity. In this work, highly efficient SMSI was successfully constructed via steam aging post-treatment over CeO2–Al2O3 nanocrystalline loaded Ni catalysts (NiCeAl). Remarkably, the NiCeAl–H2O catalyst achieves ∼50% CO2 conversion with 90% CO selectivity at 600 °C, representing a dramatic improvement over the untreated NiCeAl catalyst (23% CO2 conversion with ∼92% CO selectivity). Furthermore, the steam-treated catalyst demonstrates superior stability in prolonged CO2 hydrogenation tests, maintaining its performance with only a ∼4% conversion decrease over 10 h of continuous operation. In situ diffuse reflectance infrared Fourier transform spectroscopy analysis revealed that CO2 chemisorbs on the catalyst surface to form bidentate carbonates, which undergo sequential hydrogenation to form formate intermediates. These formate species subsequently decompose catalytically to produce CO, with the enhanced MSI in NiCeAl–H2O facilitating optimal CO desorption kinetics, thereby promoting superior reverse water–gas shift activity.
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APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Kunfeng Zhang,Jinxia Liang,Sainan Yang,Fangfei Song,Hongxia Chen,Baozhong Zhang,Bo Peng,Hanyu Chen,Hongxing Dai
Constructing an S-scheme heterojunction presents an effective strategy to enhance photocatalytic efficiency via accelerating photoexcited charge separation while preserving strong redox potentials. Herein, amorphous Ni(OH) 2 (a-NH) was in-situ integrated with crystalline Bi 12 O 17 Br 2 (BOB) nanosheets to form an amorphous/crystalline a-NH/BOB S-scheme heterojunction. The as-synthesized a-NH/BOB-0.5 photocatalyst exhibited superior bisphenol A (BPA) degradation efficiency, achieving 48.7 and 3.7-fold enhancements compared to individual a-NH and BOB, respectively. Comprehensive investigations revealed that the improved photocatalytic activity originated from the synergistic effects of enhanced light-harvesting ability and the formation of strong interfacial electric field at the amorphous/crystalline interface. Moreover, the influences of solution pH, coexisting anions, and water matrices on BPA degradation efficiency were also investigated. Reaction mechanism and toxicity assessment demonstrated that BPA could be gradually transformed into small molecules with low toxicity. This work demonstrates an efficient approach for the design of high-performance photocatalysts for environmental remediation by constructing amorphous/crystalline interface and S-scheme charge transfer mechanism.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2025
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IF 2.8
Li Tian,Ronghua Chen,Jiang Tan,Fan zhang,Junhong Guo,Bo Mu
To enhance the flame retardancy and smoke suppression performance of epoxy resins (EP), this study reports the synthesis of a high-efficiency flame retardant (SLDH-Ni-KD) through sequential intercalation modification and surface functionalization of layered double hydroxide (LDH). The optimized design addresses both the flame-retardant efficacy enhancement and the inherent compatibility limitations of LDH in EP matrices. Comprehensive combustion characterization was conducted through thermogravimetric analysis (TGA), cone calorimetry testing (CCT), limiting oxygen index (LOI) determination, and UL-94 vertical burning assessment. The underlying flame-retardant mechanism was systematically investigated using scanning electron microscopy, Raman spectroscopy, and thermogravimetry-infrared spectroscopy analysis of char residues. Experimental results revealed that the synergistic interaction between LDH and DOPO components, combined with the bi-phase catalytic charring effects mediated by magnesium/aluminum ions, enabled the 7% SLDH-Ni-KD/EP composite to achieve exceptional fire safety performance. Specifically, the composite demonstrated an elevated LOI value of 33.8% ± 0.1%, accompanied by substantial reductions in total heat release (THR) and smoke production rate (SPR). Mechanical property assessments identified 5 wt.% SLDH-Ni-KD as the optimal loading for maintaining EP matrix compatibility. This work successfully develops an innovative LDH-based nano-flame-retardant system that integrates high-efficiency fire-retardant and smoke-suppressing functionalities, establishing a novel multielement synergistic strategy for polymer flame retardancy.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Shilpi Sengupta,Samim Reza,Roshini Arulraj,Ranjit Thapa,Manab Kundu
Supercapacitors have emerged as promising energy storage devices due to their high-power density and long cycle life, making them attractive alternatives to conventional energy storage systems. Among various electrode materials, transition metal sulfides, particularly cobalt nickel sulfides, have gained significant attention due to their superior electrical conductivity and rich redox chemistry. In this study, we synthesized cobalt nickel sulfides (CoNi₂S₄/Ni₃S₂) on nickel foam via a facile two-step hydrothermal method to investigate their electrochemical performance in two different morphologies: nanosheets and nanoarrays. Electrochemical characterization demonstrated that CoNi₂S₄/Ni₃S₂ nanoarrays exhibited enhanced performance compared to their nanosheet counterparts, with an areal specific capacitance of 8203.63 mF cm −2 at 30 mA cm −2 over 6000 cycles. The superior performance of the nanoarrays was attributed to their unique vertical alignment, providing more electroactive sites and reducing ion diffusion resistance. To further elucidate the electronic properties of CoNi₂S₄/Ni₃S₂, density functional theory (DFT) calculations were performed. The results indicated that the heterostructure exhibited an increased density of states near the Fermi level compared to pristine CoNi₂S₄, leading to improved charge storage capability. Quantum capacitance analysis revealed that the CoNi₂S₄/Ni₃S₂ heterostructure possessed higher capacitance values over a range of electrode potentials, corroborating the enhanced electrochemical properties observed experimentally. Furthermore, work function analysis suggested improved electronic conductivity in the hybrid structure, further supporting its superior charge transfer characteristics. The hybrid solid-state device fabricated by coupling of CoNi₂S₄/Ni₃S₂ electrodes with activated carbon, delivered an energy density of 0.204 mWh cm −2 at a power density of 8 mW cm −2 . Impressively, even at a high-power density of 40.0 mW cm −2 , it retained an areal energy density of 0.039 mWh cm −2 .
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Chengcheng Qi,Yaqi Kong,Xinyi Qi,Ziyin Yang
Metal single-atom materials are attracting tremendous attention in the field of electrochemical sensing. How to regulate the electrocatalytic activity of metal single-atom materials remains a significant challenge. Here, it was the first time that a dual hetero-atom catalyst comprising adjacent Ni N 4 and Se C 3 sites (Ni 1 Se 1 /NC) was designed for boosting electrochemical glucose sensing. Ni 1 Se 1 /NC material was synthesized through via high-temperature pyrolysis. Experimental and theoretical results demonstrate that Ni single atoms function as the primary active sites for glucose activation. Adjacent Se single atoms, while catalytically inactive, modulate the electronic structure of Ni through electron donation from Ni N 4 to Se C 3 sites. This accelerates electron transfer and enhances glucose molecule adsorption. The synergistic effect of the Ni Se atomic pair significantly boosts electrocatalytic glucose oxidation activity, resulting in a nearly 6-fold increase in glucose detection sensitivity. Unlike dual-atom site systems where both atoms serve as catalytic centers, this study reveals the unique function of the Se site as a non-catalytic modulator. Via electronic effects, Se enhances the catalytic activity of Ni sites without directly participating in the reaction, representing a departure from conventional dual-atom site mechanisms.
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ENERGY
·
2025
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IF 9.4
Xiaomeng Yang,Zhen Zhang,Xiangang Li,Jianshe Wang,Dan Wu,Yongsheng Zhang,Chunbao Charles Xu
The production of phenolic monomers from agricultural waste biomass is environmentally friendly, economical, and sustainable. Here, we synthesized floral-like Ni-Co alloy catalysts via hydrothermal method for hydrodeoxygenation (HDO) of corn stalk lignin (CSL) to phenolic monomers. The optimized Ni 1 Co 2 Al-LDO-500 catalyst exhibits excellent catalytic performance for HDO of CSL, with lignin oil and phenolic monomer yields as high as 63.37 wt% and 46.63 wt% at 240 °C, respectively. XRD and TEM characterization confirms the formation of Ni-Co alloys, and XPS analysis reveals that the electron transfer between Ni and Co in the catalysts enhances the efficient activation of H 2 and the hydrogenation breaking of C-O bonds. Moreover, the possible reaction pathways and reaction mechanisms of β-O-4 bonds hydrogen cleavage reaction over NiCoAl-LDO catalysts were elucidated by combining model reaction and 2D HSQC NMR analyses. Understanding the synergistic effect of Ni-Co alloy and acid site in NiCoAl-LDO catalysts in the HDO of CSL facilitates the efficient depolymerization of lignin for the production of phenolic products.
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ADVANCED FUNCTIONAL MATERIALS
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2025
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IF 19
Xinci Zhang,Mingming Wang,Li Chang,Chunjie Yu,Xiaoxuan Fan,Maosheng Cao,Lin Li
To ensure the effective operation of equipment in dynamic electromagnetic environments, the development of intelligent electromagnetic protection materials is crucial. However, inherent contradictions often exist between electromagnetic response technologies across different frequency bands and electronic sensing technologies, making the compatibility of multiple technologies a persistent challenge. Inspired by the structure and function of kelp, this study successfully develops a two-dimensional nanocarbon ribbon superstructure embedded with nickel nanoparticles (2D Ni@NCRS) through the one-step pyrolysis of bulk Ni-MOFs, effectively addresses the aforementioned contradictions. This biomimetic kelp-like structure features interconnected nanocages and a porous architecture, significantly enhances the electromagnetic wave (EMW) attenuation capability and impedance matching characteristics of the materials, thereby achieves exceptional EMW absorption performance. Furthermore, the functional film based on 2D Ni@NCRS fully leverages the conductive network, thermal insulation properties, and ultraviolet absorption characteristics of the materials, simultaneously enables multifunctional capabilities such as gigahertz-infrared-compatible stealth, ultraviolet protection, and flexible strain sensing. This innovative design integrates electromagnetic stealth protection, environmental camouflage, and sensing into a unified system, enables multifunctional synergies and enhances the potential for integrated material applications in complex environments.
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ACS Sustainable Chemistry & Engineering
·
2025
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IF 7.3
Ziyang Xu,Ying Shen,Liang Chen,Chunbo Wang
Direct CO2 hydrogenation from primary carbon sources such as flue gas offers an attractive route for carbon-neutral fuel synthesis, yet the presence of O2 severely impairs catalyst performance due to preferential H2–O2 reactions and subsequent catalyst deactivation. Herein, we report a surface-engineered Ni/γ-Al2O3 (Ni/A) catalyst modified by Cu doping (Ni–Cu1/A), which exhibits enhanced oxygen resistance and sustained CH4 produce under oxidative conditions. Guided by a descriptor τ, defined as the ratio of O2 to CO2 adsorption energies, Cu was identified as an effective dopant to suppress O2 adsorption while preserving CO2 activation. Under a challenging atmosphere containing 6% O2, the optimized Ni–Cu1/A catalyst achieved a CH4 STY of 76.4 mmol gcat–1 h–1, significantly outperforming the undoped Ni/A catalyst, which drops to 63.1 mmol gcat–1 h–1 under the same conditions. Mechanistic analysis reveals that Cu incorporation weakens O2 adsorption by regulation of electronic structure, thereby mitigating exothermic H2–O2 side reactions and stabilizing Ni0 sites. This work presents a practical and scalable strategy for CO2 methanation in the presence of O2, offering a promising approach for direct catalytic conversion of flue gas by leveraging selective surface adsorption and electronic structure modulation.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Yuanyuan Liu,Yong Yan,Xiujie Wang,Zhi Yang,Xinhua Li
To enhance the performances of energy storage and conversion devices, understanding their charge-storage mechanisms is essential. Research on energy-storage mechanisms for addressing the problem of low energy density in supercapacitors is lacking, which hinders their widespread adoption. This study introduces a novel high-density two-dimensional layered coordination polymer (CP) electrode material (i.e., [Ni(II) 6 Ni(II) 2 Li 3 (mba 2− ) 6 (S 2− ) 2 (OH − ) 3 ] n (Ni-mba-Li; H 2 mba = 2-mercaptobenzoic acid)) for use in aqueous hybrid capacitors. This electrode exhibits battery-type electrode behavior with a high volumetric capacity. Moreover, the asymmetric device achieves a high volumetric energy density and demonstrates outstanding capacitance retention and Coulombic efficiency over 13,000 charge/discharge cycles. A range of analytical techniques is used to explore the energy-storage mechanism of the CP at the molecular level. Electrochemical studies reveal that in KOH solution, Ni-mba-Li decomposes into Ni(OH) 2 and the corresponding ligands. However, under an electric field, these decomposition reactions are converted into reversible redox reactions, enabling rapid charge storage. Moreover, the electric field triggers new irreversible reactions, and effectively controlling these processes is key to enhancing the performance and lifespan of the electrode material. This study highlights the potential of rational molecular design to develop advanced electrode materials for energy-storage applications.
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