ULTRASONICS SONOCHEMISTRY
·
2026
·
IF 10.2
Ruida Li,Huaxing Li,Fafeng Xia,Chunyang Ma,Zhongmin Xiao
To overcome the challenge of building stage-wise energy storage devices with tunable charge distribution, a novel electrodeposition method was developed using ultrasonic disruption. This technique enabled the fabrication of nickel–cobalt–manganese (Ni-Co-Mn) ternary oxide electrodes with vertically graded structures. The gradient was created by sequentially depositing four layers under varying ultrasonic power densities (10–40 W·cm −2 ) and substrate tilt angles (15°-45°). By precisely adjusting these parameters, a series of vertically graded NCM-x electrodes was synthesized. Among them, the NCM-11 sample, prepared using a power density ( P ) equal to 30 W·cm −2 and a tilt angle of 35°, revealed the most favorable morphology and electrochemical performance. Characterization using TEM and XPS confirmed the uniform distribution of NiO, Co 3 O 4 , and MnO 2 phases. BET analysis exhibited a specific surface area equaling 56.97 m 2 ·g −1 . Electrochemical measurements revealed that NCM-11 delivered a high specific capacitance equal to 1430.7F·g −1 at 1 mA·cm −2 , retaining 1334.9F·g −1 even at 15 mA·cm −2 , with excellent cyclic stability, maintaining 93.3 % of its capacitance following 5000 cycles. When assembled into an asymmetric supercapacitor (NCM-11//AC), the device achieved an energy density equal to 45.6 Wh·kg −1 at P = 830.7 W·kg −1 , and 30.8 Wh·kg −1 at P = 2440.3 W·kg −1 . It also demonstrated exceptional long-term stability, maintaining 96.2 % of its capacitance following 5000 cycles. These findings showcase the prospective value of ultrasonic-assisted, gradient-controlled electrodeposition for developing high-performance supercapacitor electrodes.
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LANGMUIR
·
2026
·Vol. 42
·期 31
·22950-22957
·
IF 4.4
Chen Nannan,Yuan Qingle,Liu Qin,Zhang Chao,Wu Zhengcui,Bi Wentuan
Single-atom catalysts (SACs) hold great promise for the
electrochemical
reduction of CO 2 to CO; however, the high selectivity is
typically restricted within a narrow potential window, limiting their
practical implementation. In this study, Ni–N–C catalysts
were supported on ordered and disordered carbon nanofiber membranes
(denoted as o-NiNC and d-NiNC, respectively) via electrospinning to
elucidate the effect of nanofiber alignment on CO 2 reduction
activity. The results demonstrate that o-NiNC catalysts allow for
spatially uniform H + /CO 2 delivery and consumption,
thereby mitigating the selectivity variations arising from uneven
spatial distribution of reactants. As a result, the o-NiNC catalysts
achieve a CO Faradaic efficiency (FE) of 98.5% at −1.0 V and
maintain an FE above 90% across a broad potential range (−0.6
to −1.6 V). This work provides new insights into the rational
design of high-performance CO 2 reduction electrocatalysts
through geometric engineering.
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高影响因子
ENERGY & FUELS
·
2026
·Vol. 40
·期 31
·16999-17010
·
IF 6
Qi Youwei,Li Xuanyi,Zhao Mingxing,Mao Yuxiang,Cheng Jun
To address the challenges of low utilization of active
sites and
poor thermal stability of catalysts in the conversion of microalgal
biodiesel into biojet fuel under CO 2 atmosphere, a nickel-rich
carbon sheet catalyst was synthesized through partial pyrolysis of
a nickel-based aminoterephthalic acid framework (Ni-NH 2 –BDC) to enhance conversion rate and product selectivity.
Because the specific surface area of Ni-NC-500 derived from pyrolyzed
Ni-NH 2 –BDC at 500 ° C increased from 20.866
to 304.337 m 2 /g, more generated Ni 0 active sites
(33.69%) strengthened the deoxidation of methyl palmitate (a typical
composition of microalgal biodiesel). Compared with Ni-NH 2 –BDC, the total acid of Ni-NC-500 has significantly increased,
reaching 58.485 mmol/g, which will promote C–C bond breaking.
The large amounts of pyridine nitrogen (N-6, 39.98%) and pyrrole nitrogen
(N-5, 60.13%) present in Ni-NC-500 can significantly enhance the catalytic
performance. Therefore, the conversion rate of methyl palmitate and
the selectivity for jet-fuel range (C8–C16) products increased
to 96.28 and 84.69%, respectively.
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POLYMER COMPOSITES
·
2026
·
IF 4.9
Guoqin Jiang,Zhixiong Huang,Yuzhan Lu,Haoyu Wang,Zongyi Deng
Reusable hypersonic vehicles require large area thermal protection materials with high resistance to oxidation corrosion. Conventional carbon fiber/phenolic resin composites suffer from poor oxidation corrosion resistance and are limited to single use. Here we develop a novel ceramizable composite consisting of Ti 3 AlC 2 -MoSi 2 -SiB 6 modified Ni coated carbon fiber reinforced boron phenolic resin. After 1 to 15 thermal cycles at 1200°C for 15 min each, the composite shows excellent dimensional stability. The changes in mass, thickness, and density after 15 cycles are all within 7% of the initial heat-treated sample. Flexural strength reaches 28.0 MPa after 10 cycles and remains 19.4 MPa after 15 cycles. The superior oxidation corrosion resistance arises from the synergistic effects of oxygen consumption, oxygen barrier, and self-healing functions provided by the ceramizable fillers and Ni coating. In situ formed ceramic phases preserve the fiber skeleton integrity. Ni catalyzes pyrolytic carbon (PyC) graphitization and together with ceramization products forms a dense multiphase ceramic layer that protects against oxidative attack. These synergistic effects endow the composite with outstanding reusable performance for hypersonic vehicle applications. Highlights A novel reusable ceramizable composite is fabricated by a dual-modification synergistic reinforced strategy involving ceramizable fillers and fiber coatings. It exhibits satisfactory oxidation resistance, dimensional stability, and reusability. The flexural strength after 10 thermal cycles reaches 28.0 MPa.
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Yunxu Yang,Xiaoxi Huang,Yong Shen Chua,Hooi Ling Lee
Fe–SnO 2 @NiO–NF removed 96.85% CIP within 150 min under solar light. • S-scheme heterojunction promotes charge separation and photocatalytic activity. • 3D NiO–NF support enables easy recovery and abundant active sites. • Over 94% degradation activity was retained after four cycles. • DFT and HPLC–MS reveal charge transfer and CIP degradation pathways. Photocatalysis is effective for antibiotic degradation but limited by poor charge separation and difficult recovery of powder catalysts. In this work, a macroscopic p–n heterojunction photocatalyst (Fe–SnO 2 @NiO–NF) was prepared on pre-oxidized nickel foam through in situ growth and microwave-assisted synthesis. XRD confirmed the coexistence of SnO 2 and NiO phases, while HRTEM and XPS analyses verified the successful construction of the Fe–SnO 2 /NiO heterojunction with intimate interfacial contact and interfacial electronic interaction. UV–vis DRS, PL, TRPL, EIS, and photoelectrochemical measurements demonstrated markedly improved light absorption, charge separation and transfer behavior, with a narrowed band gap of 2.92 eV and a prolonged average carrier lifetime of 1.2226 ns. Owing to the enhanced charge separation and the conductive 3D NiO–NF framework, Fe–SnO 2 @NiO–NF exhibited significantly improved photocatalytic activity for ciprofloxacin degradation under solar irradiation, reaching 96.85% removal within 150 min, while the immobilized catalyst could be readily separated from the aqueous solution. ESR and scavenging test identified •O 2 – and h + as the main reactive species, with •O 2 – playing the dominant role, while HPLC–MS revealed the degradation intermediates and pathways. Band structure analysis and DFT calculations demonstrated that the p–n heterojunction follows an S-scheme charge transfer mechanism, promoting efficient charge separation while preserving strong redox capability. The composite retained over 94% of its initial activity after four cycles, showing excellent stability and recyclability. This study provides a practical way to develop efficient and reusable photocatalysts for antibiotic wastewater treatment. Download: Download high-res image (182KB) Download: Download full-size image
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International Journal of Applied Ceramic Technology
·
2026
·Vol. 23
·期 1
·e70146
·
IF 2.6
Kiran Shoukat,Muhammad Irfan,Saba Shoukat,Syed Imran Abbas Shah,Kareem Yusuf,Adeel Hussain Chughtai,Muhammad Fahad Ehsan
Simplifying water electrolysis systems and enhancing hydrogen production efficiency can be achieved by developing high-performance electrocatalysts. This paper presents the synthesis of nickel-doped indium selenide (Ni@InSe) on nickel foam (NF) through a hydrothermal reaction. The distinct three-dimensional structure of NF acts as the reaction skeleton, facilitating gas diffusion and electron conduction. Different physical and electrochemical techniques successfully characterize the synthesized materials. InSe carries 0.10043 s − 1 , while the doped material Ni@InSe carries 0.1308 s − 1 TOF values. The XRD results show that InSe and Ni@InSe exhibited crystal sizes of about 45 and 30 nm, respectively. InSe and Ni@InSe revealed an overpotential of 349 and 260 mV at 10 mA·cm −2 current density through a minor Tafel slope value of 70 and 35 mV·dec −1 , respectively, within 1.0 M KOH electrolyte. Doped material also exhibits excellent stability as well. These extraordinary results are owing to the extremely crystalline nature, several active sites, great electrical conductivity, and porosity of the synthesized material, which refers it to its use in different energy-related fields.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·
IF 3.9
Li Mei,Qian Wang,Yao Yao,Xiaolong Fang,Ziwen Li,Chao Liu,Ganggang Chang,Xiaoyu Yang
Tandem catalysis can enhance the reaction efficiency and selectivity while reducing separation and purification steps, thus improving the development of “green chemistry”. The tandem synthesis of cyclic carbonates (CCs) from olefins and CO2 is becoming one of the most promising strategies; however, designing a multifunctional catalyst with multiple sites and fast mass transfer channels to overcome mass transfer resistance at different sites remains a challenge. In this work, we controllably synthesized a bulk and nanosheet (NS) structure of Ni-BDC-NH2 (Ni-BDC-NH2 NS) via a solvent regulation strategy and successfully immobilized Ag+ in Ni-BDC-NH2 NS to form Ag+@Ni-BDC-NH2 NS, which integrated highly exposed, synergistic acid (Ag+) and base (−NH2) active sites, along with rapid mass transfer channels. Benefiting from these synergistic effects and structural advantages, Ag+@Ni-BDC-NH2 NS efficiently catalyzed one-pot synthesis of CCs from olefins and CO2, achieving 99% conversion of styrene and 51% selectivity for styrene carbonate (SC) under optimal conditions, which was significantly higher than that of contrast catalysts lacking Ag+ or –NH2 (SC selectivity <30%). Based on experiments, a feasible mechanism was proposed, in which the Lewis acid sites (Ag+) catalyzed olefin epoxidation, while the Lewis base sites (−NH2) and acid sites (Ag+) synergistically catalyzed the cycloaddition reaction of CO2 and epoxides. Additionally, the catalytic performance and structural stability were maintained even after five successive recycling tests.
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高影响因子
LANGMUIR
·
2026
·
IF 4.4
Jing Zhang,Shiyao Hou,Xindi He,Haiming Li,Xing Wang,Ziqing Gao,Yanzhu Guo
Green fluorescent protein (GFP) is widely utilized as a fluorescent probe in biomedical research, yet its high-purity separation remains challenging. Traditional purification methods often involve complex procedures, high costs, and environmental concerns. In this study, a dual-functional bacterial cellulose-based hydrogel (BPP) was successfully fabricated via graft copolymerization of acrylic acid (AA) and acrylamide (AM) onto the BC framework. The resulting hydrogel exhibited a highly hydrated three-dimensional network with outstanding mechanical properties and swelling rate (compressive strength: 1.54 MPa; 300 compression cycles at 80% strain: 90% stress retention). The maximum adsorption capacity of BPP for Ni(II) was 315.9 mg/g (T = 55 °C) and effectively suppressed metal ion leaching while generating abundant coordination-active sites for selective GFP capture (228.9 mg/g). Notably, the captured GFP retained high fluorescence activity and could be efficiently eluted using imidazole buffer, with a recovery rate of 61.1%. Spectroscopic analyses (FT-IR and XPS) revealed a sequential adsorption mechanism involving strong chelation of Ni(II) by polymeric carboxyl and amino groups, followed by Ni(II)-mediated specific coordination with His-tagged GFP. This work demonstrates a sustainable polymer-based strategy that integrates heavy metal ion immobilization with high-value protein purification, highlighting the potential of multifunctional cellulose hydrogels for advanced bioseparation and the design of resource-oriented materials.
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高影响因子
RENEWABLE ENERGY
·
2026
·
IF 9.1
Quanxiong Lu,Xianliang Song
Direct lignin fuel cells (DLFC) have recently attracted much attention. However, there are few reports on preparing anodic catalytic layer for DLFC. Thereby, we loaded a small amount of platinum carbon (Pt/C) catalyst on the surface of nickel (Ni) foam by a simple roller pressing method, thus realizing the preparation of Pt-Ni/C bimetallic catalysts. The results proved the successful loading of the Pt/C catalyst onto nickel foam, and the catalyst particle size has an average size of 2.76 nm. The Pt-Ni/C catalysts not only have good oxygen evolution reaction (OER) activity (154 mV overpotential@10 mA/cm 2 and tafel-slope of 44 mV/dec) but also have good lignin oxidation reaction (LOR) activity with a low overpotential of 247 mV at 10 mA/cm 2 . Pt-Ni/C catalysts were applied to DLFC at room temperature, showing an open-circuit voltage (OCV) of 0.84 V and a maximum power density of 0.62 mW/cm 2 . The optimum Pt/C loading was found to be 0.5 mg/cm 2 . The modified DLFC is comparable to glucose fuel cells' power generation performance and shows better application prospects.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Qiaozhi Han,Chengxu Li,Yunshu Wang,Ziwei Ma,Chengyu Duan,Yucong Yin,Zichen Bao,Yonghao Shen,Chenwen Yin,Zhuofeng Hu,Qiming Sun
Abstract The direct synthesis of hydrogen peroxide (H2O2) from H2 and O2 provides a sustainable route for decentralized oxidant production, but its practical use is limited by inefficient Pd utilization, undesired H2O2 decomposition, and the need for high noble-metal loadings. Here, we report a Ni(OH)2-promoted Pd@S-1 catalyst that integrates zeolite confinement with interfacial electronic modulation for efficient aqueous H2O2 synthesis. The optimized Pd4Ni1@S-1-H catalyst delivers an H2O2 productivity of 3.39 mol gPd–1 h–1 under acidic conditions, representing the highest value among reported semibatch glass reactor systems and a 10-fold improvement in Pd utilization efficiency relative to a commercial Pd/C catalyst. Advanced spectroscopic analysis and density functional theory calculations reveal that Ni(OH)2 donates electrons to Pd, lowering the average Pd valence state from 1.83 to 1.39, and serves as a hydrogen-transfer bridge that promotes hydrogen migration to the *O–O intermediate. Meanwhile, hydrophobic silicalite-1 (S-1) zeolite micropores enrich dissolved H2/O2 and suppress secondary H2O2 decomposition by facilitating product desorption. The resulting in situ H2O2 generation system enables efficient Cr(VI) reduction, highlighting its potential for sustainable water remediation.
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高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Lei Jiang,Chunli Mao,Gaojie Cheng,Hongbo Yang,Jiawen Yin,Qinghui Jin
An integrated three-electrode non-enzymatic urea sensor is developed. • The sensor exhibits a wide linear range (1–200 mg/L) and a fast response (10.8 s). • Detection potential dynamically regulates the contributions of the two urea oxidation pathways. Rapid and accurate monitoring of urea concentration in swimming pool water is critical for protecting swimmers' health and optimizing water quality management. However, traditional techniques are either expensive or operationally complex, whereas enzyme-based sensors suffer from enzyme deactivation, limiting their applicability for online monitoring. In this paper, a nickel hydroxide/nickel oxyhydroxide (Ni(OH) 2 /NiOOH) nanonetwork electrochemical sensor for non-enzymatic urea detection is proposed, which is mass-produced on a platinum electrode using microelectromechanical systems (MEMS). The electrode was activated and optimized via cyclic voltammetry by varying the scan rate. The sensor demonstrates a high sensitivity of 1.43 μA/(mg·L −1 ·cm 2 ), a wide detection range of 1–200 mg/L, a fast response time (<12 s), good repeatability with a relative standard deviation (RSD) of 1.24%, and an excellent linearity ( R 2 = 0.9988). In addition, the proposed sensor exhibits excellent anti-interference performance toward coexisting species such as creatinine, uric acid, residual chlorine, and lactic acid. Practical applications in swimming pool water samples yielded recovery rates of 92.5–100.4%, validating the sensor's robustness. Two distinct oxidation mechanisms for urea on the electrode were observed by electrochemical impedance spectroscopy (EIS). The direct pathway was further found to be potential-tunable, with its charge-transfer resistance decreasing by 35.6% upon raising the working potential from 0.45 V to 0.50 V. This work offers a promising route toward non-enzymatic urea sensors for swimming pool water monitoring. Download: Download high-res image (140KB) Download: Download full-size image
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Jiwang Cha,Jun Guo,Yiwen Chen,Buming Chen,Zhongcheng Guo
Ni/NiFeMo-LDH Schottky heterostructure was constructed by an electro-deposition method. • Accelerated charge transfer and reconstruction boost OER/HER kinetics. • Delivers 280 mV for OER and 250 mV for HER at 100 mA·cm −2 with long-term stability. Layered double hydroxides (LDHs) are promising OER catalysts but suffer from poor conductivity, slow interfacial charge transfer, and limited stability at high current densities. Here, we couple crystalline Ni-rich domains with an amorphous/poorly crystalline Ni-Fe-Mo hydroxide/oxyhydroxide-rich layered phase to form a conductive Mott-Schottky-type heterointerfacial architecture. The shift in XPS binding energy is consistent with interfacial electron coupling and possible charge redistribution. Electrochemical impedance measurements revealed a decrease in charge transfer resistance, and in situ Raman spectroscopy independently identified potential-induced reconstruction toward Ni(Fe)OOH-related active species. The resulting electrode achieves low overpotentials of 280 mV for OER and 250 mV for HER at 100 mA·cm −2 . Under near-industrial conditions (80 °C, 30% KOH), an AEM electrolyzer operates stably for 40 h with negligible decay, demonstrating its strong practical potential and providing guidance for the design of in situ catalytic electrodes via Schottky heterojunctions. Download: Download high-res image (186KB) Download: Download full-size image
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危险品化学品经营许可证（带存储）