SENSORS AND ACTUATORS B-CHEMICAL
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2026
·
IF 8.3
Haoyang Ge,Tianle Wang,Ming-Yu Li,Songhua Xie,Haifei Lu,Xiaoyan Wen,Cong Wang,Sisi Liu
Hydrogen plays a vital role in zero-carbon energy systems and lithium-ion battery health monitoring, while its safe utilization faces a critical challenge in achieving high-accuracy room-temperature detection with fast response speed. Herein, Ti 3 C 2 T x ternary composites decorated with Pd and SnO 2 nanoparticles (MPS) are successfully synthesized via a facile approach at 80 ˚C with a high hydrogen sensitivity based on a synergetic effect. Within the MPS composites, the dissociation energy barrier for hydrogen molecules can be drastically reduced with the existence of Pd nanoparticles, boosting the ionization of active hydrogen atoms at the heterointerface between SnO 2 and MXene via the hydrogen spillover effect. The isomorphous substitution of Ti 3+ by Sn 4+ generates abundant holes at the heterointerface, and the built-in electric field formed at the heterointerface subsequently promotes the recombination of these holes with the electrons generated during hydrogen ionization. Benefitting from the series of reaction, the optimal response of 73.5% is obtained with fast response/recovery time of 47 s/36 s upon exposure to 200 ppm H 2 at room-temperature. In addition, an outstanding linearity (R 2 =0.9908) is achieved within a range between 5 and 200 ppm, resulting in a superior LOD of 1.96 ppm. The MPS composite gas sensor simultaneously exhibits exceptional selectivity and cycling stability, shedding light on the new perspective of high-performance room-temperature gas sensing.
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高影响因子
International Journal of Minerals Metallurgy and Materials
·
2026
·Vol. 33
·期 6
·1870-1885
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IF 8.8
He Baili,Kou Jue,Sun Chunbao,Li Yue,Li Xiaolin,Temirov Uktam,Chang Ziyong
The development of effective adsorbents is crucial for the sustainable recovery of noble metals from secondary resources. In this study, MIL-101(Cr)-Tu, a Cr-based metal–organic framework (MOF) modified with thiourea, was successfully prepared by double-phase encapsulation followed by post-synthetic modification. At 298 K, the largest adsorption capacities of Au(III), Pd(II), and Pt(IV) by MIL-101(Cr)-Tu were (1230.83 ± 8.72), (330.41 ± 7.29), and (315.58 ± 13.67) mg·g −1 , respectively. The uptakes of Au(III), Pd(II), and Pt(IV) increased with temperature. The adsorption data fit well to both the Langmuir and pseudo-second-order kinetic models, indicating that the adsorption process conformed to monolayer adsorption and chemisorption. Mechanistic analysis revealed that the amino and thiourea groups facilitated the adsorption of noble metals through coordination and electrostatic attraction. Notably, Au(III), Pd(II), and Pt(IV) interacted strongly with the thiourea groups owing to their “soft–soft” interactions. Moreover, Au(III) was reduced to Au(I) and Au(0), Pt(IV) was reduced to Pt(II), and the amino groups were oxidized to NO 2 . The adsorption of Pd(II) did not involve redox reactions. Additionally, MIL-101(Cr)-Tu exhibited strong selectivity for noble metals and excellent reusability, demonstrating its great potential for the extraction of noble metals from secondary resources.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Mengxuan Zhang,Xuxiang Zheng,Lanyue Kou,Lizhu Xiao,Huan Cai,Tao Hu,Yujiao Ma,Anyi Chen,Min Zhao
In situ -engineered NU-1000@Gra gives 2.20-fold ECL enhancement via dual paths, surmounting single-component trade-off. • First Zr-MOF/graphene synergistically boosts ECL, lifting quantum yield from 11.89% to 15.69% via excited-state optimization. • TDN strategy enhances stability and anti-interference, enabling PD-L1 + tEV detection with LOD 899.35 particles/mL. • NGTA platform detects NSCLC with 100% sensitivity, 90.91% accuracy, 32.09-fold lower LOD than ELISA for tEV biopsy. Tumor-derived PD-L1 + extracellular vesicles (PD-L1 + tEVs) represent valuable liquid-biopsy biomarkers for non-small-cell lung cancer, whereas their reliable quantification is largely restricted by low abundance and complex matrix interference. Herein, we fabricated an in-situ engineered NU-1000@Graphene (Gra) nanohybrid as a kinetics-efficiency dual-boosted electrochemiluminescence (ECL) emitter to build the N U-1000@ G ra t etrahedral a ptasensor (NGTA). Benefiting from intimate interfacial coupling, Gra acted as a bifunctional accelerator in the NU-1000/S 2 O 8 2− system, accelerating interfacial electron transfer and sulfate radical production to realize a 1.58-fold improvement in ECL kinetics and a 1.39-fold enhancement in luminescence efficiency. Assisted by the tetrahedral DNA nanostructure scaffold that suppressed non-specific adsorption, the NGTA achieved an ultralow detection limit of 899.35 particles/mL for PD-L1 + tEVs. Preliminary clinical results demonstrated its diagnostic potential. This work underscores the significance of metal-organic framework (MOF)-Gra interfacial engineering for synergistic ECL amplification, providing a rational material design paradigm for high-performance liquid-biopsy biosensors.
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Catalysis Science & Technology
·
2026
·
IF 4
Hurunqing Liu,Lin Ye,Yun Yuan,Quanyuan Wang,Dengrong Sun,Zhaohui Li
Light-driven one-pot tandem/cascade reactions have attracted increasing interest due to their green process and atomic efficiency. In addition to active sites, the adsorption behavior of reaction substrates also plays a critical role on the catalytic process, but is always overlooked. Herein, we report that modulating the reaction substrates to regulate the adsorption behavior of intermediates can effectively facilitate one-pot multi-step reactions. O-Nitroaniline is strategically selected to replace the commonly used o-phenylenediamine for reaction with benzyl alcohol to synthesize benzimidazole in a one-pot process under visible-light irradiation. The use of o-nitroaniline effectively promotes the adsorption of the benzyl alcohol-derived aldehyde intermediate on the catalyst but weakens the adsorption of o-nitroaniline-derived o-phenylenediamine. Thus, the condensation between these two intermediates can proceed smoothly, alleviating the fatal polymerization side reaction of o-phenylenediamine, affording high efficiency in light-driven benzimidazole production. Departing from the conventional catalyst design, this work underscores an effective way to modulate the reaction substrates for accelerated one-pot synthesis, signifying an important contribution to the design of one-pot synthesis systems.
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Journal of Environmental Sciences
·
2026
·
IF 6.5
Zongyao Ying,Yingjie Wang,Xiaoyan Shi,Zidi Yan,Wenmiao Li,Yulong Shan,Yunbo Yu
Pd/SSZ-39 catalyst shows high performance for NO and C 2 H 4 adsorption even after hydrothermal aging at 850 °C. • Pd 2+ ions in Pd/SSZ-39 serve as active sites for both C 2 H 4 and NO adsorption. • In the co-existence of NO and C 2 H 4 , Pd/SSZ-39 preferentially adsorb NO while also retaining the ability to C 2 H 4 adsorption. In this work, Pd/SSZ-39 zeolite catalyst (an AEI-type) was studied as a passive NO x adsorber (PNA) and hydrocarbon trap aiming for cold-start emission control in diesel vehicles. The fresh and hydrothermally aged Pd/SSZ-39 were characterized by XRD, 27 Al NMR, H 2 -TPR, NO x -TPD and DRIFTS of CO adsorption to investigate the changes of zeolite structure and Pd species. The catalytic performance of fresh and hydrothermally aged catalyst in low temperature NO and C 2 H 4 adsorption were evaluated. Moreover, systematic PNA experiments under various conditions were conducted to study the NO and C 2 H 4 adsorption, as well as oxidation of C 2 H 4 and CO on Pd/SSZ-39. Moreover, the interaction of NO with CO or C 2 H 4 were studied by in situ DRIFTS experiments. Results demonstrate that Pd 2+ ions in Pd/SSZ-39 serve as the active sits for both C 2 H 4 and NO adsorption. In the gaseous mixtures of NO and C 2 H 4 , Pd 2+ ions in Pd/SSZ-39 tend to preferentially adsorb NO rather than C 2 H 4 . Both C 2 H 4 and CO act as a reducing component which enhances the NO adsorption and shifts the NO desorption to higher temperatures. Download: Download high-res image (237KB) Download: Download full-size image
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Journal of Materials Chemistry A
·
2025
·
IF 9.5
You Xu,Hao Chen,Youwei Sheng,Taoyuan Tian,Kai Deng,Ziqiang Wang,Hongjie Yu,Liang Wang,Hongjing Wang
Electrocatalytic urea synthesis from CO2 and NO3− offers a dual solution for greenhouse gas mitigation and industrial effluent valorization, while enabling renewable energy storage. Rational design of advanced catalysts for urea electrosynthesis represents a scientifically critical yet persistently challenging endeavor. In this study, we developed Pd–Bi dilute alloy metallene arrays grown on Cu foam (Pd–Bi/CF) by a two-step galvanic replacement strategy. The optimized Pd10–Bi90/CF could deliver a notable urea yield rate of 2165.2 μg h−1 cm−2 with 45.3% faradaic efficiency at −0.25 V vs. reversible hydrogen electrode (RHE). Experimental and computational studies validated that d-p orbital hybridization between d-block Pd and p-block Bi in Pd10–Bi90/CF modulates the electronic structure of active sites, thereby facilitating adsorption and activation of NO3− and CO2, synergistic generation of key intermediates *NH2 and *CO, and selective C–N coupling toward urea synthesis. This study demonstrates a viable pathway toward optimizing Bi-based catalysts for electrocatalytic urea synthesis.
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JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
·
2015
·Vol. 53
·期 12
·1457-1463
·
IF 3.113
Zilong Zhang,Pan Hu,Xiao Li,Hongmei Zhan,Yanxiang Cheng
Novel triarylamine-based coordination-saturated aryl Pd(II) halide complexes ligated by PEt 3 , PCy 3 , and P( o -tol) 3 were successfully synthesized by direct oxidative addition of aryl halide to the corresponding Pd(0) precursors. Suzuki–Miyaura coupling polymerization of 2-(7-halide-9,9-dioctylfluoren-2-yl)−1,3,2-dioxaborinane with these Pd(II) complexes as initiators was investigated for the synthesis of poly(fluorene)s with triarylamine end group. Pd(II) complexes with PCy 3 or P( o -tol) 3 exhibited catalytic activity and realized the catalyst-transfer polycondensation at 75 °C and room temperature, respectively, while the polymerization using Pd(II) catalyst ligated by PEt 3 did not proceed, which indicated that the bulky phosphine ligands could facilitate the reductive elimination and further promote the polymerization. In addition, the dimeric Pd(II) complex with P( o -tol) 3 can convert into monomeric Pd(II) intermediate with an open coordination site, which had a higher activity. The end groups of the afforded polyfluorene were analyzed by matrix-assisted laser desorption ionization time-of-flight (MALDI-TOF) mass spectrometry, in which the Ar/H end groups are indicative of the catalyst-transfer polymerization. © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2015 , 53 , 1457–1463
研究领域:
高分子化学
·
有机合成
·
金属有机化学
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功能材料
·
聚合反应机理
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Peng Guo,HongWei Li,BoYu Huang,Dong Ji,GuiXian Li,XinHong Zhao
High-performance catalysts for the methanol oxidation reaction (MOR) are critical for advancing direct methanol fuel cells. Here, we report a three-dimensionally ordered macroporous superstructure of nitrogen-doped hierarchical porous carbon (NHPC) implanted with ultrafine Pd nanoclusters (∼1.8 nm) as a highly efficient electrocatalytic micronano reactor (Pd/NHPC). Constructed via nanocasting of ZIF-8 on polystyrene colloidal crystals, followed by the confined growth of Pd, this architecture features interconnected macropores that maximize mass transport and active-site exposure. In alkaline media (1.0 M KOH + 1.0 M CH3OH), Pd/NHPC achieves a mass activity of 7383 mA mgPd–1─surpassing commercial Pt/C and Pd/C by factors of 4.09 and 3.80, respectively. It exhibits exceptional stability, retaining 95.0% activity after 500 cycles at 200 mV s–1, and delivering 2373 mA mgPd–1 after 7200 s chronoamperometry. Mechanistic studies reveal that the hierarchical porosity accelerates reactant diffusion/intermediate desorption, while optimized nitrogen configurations (pyridinic/pyrrolic/graphitic-N) enhance metal–support interaction, enrich electron density on Pd0 sites, and facilitate a direct (CO-poisoning-free) MOR pathway. This work establishes a paradigm for designing stable, high-activity nanocatalysts through synergistic structural and electronic engineering.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Shaoxia Guo,Mengting Li,Liang Gao,Yongrui Wang,Cheng Gu,Longxiao Yang,Yuping Huang,Enhui Xing,Yibin Luo,Xinbin Ma,Xingtian Shu
A series of heterogeneous Pd-catalysts was prepared via a facile new method. • Use of zeolite on EMC in C 2 mixture greatly reduced the corrosiveness of system. • The H-Beta zeolite catalyst with SiO 2 /Al 2 O 3 ratio of 22 showed superior performance. • The cooperation of H-Beta and trace MSA in presence of H 2 O boosted C 2 H 4 conversion. • A possible reaction mechanism was proposed for heterogeneous Pd-based system. Ethylene methoxycarbonylation (EMC) is highly efficient route for converting ethylene to methyl propionate (MP) with 100% atom economy, which has been commercialized over homogeneous Pd-based catalyst in pure ethylene. However, concerns about severe corrosiveness of strong liquid acids have always existed. Herein, H-Beta zeolite for the first time was introduced to cooperate with trace methanesulfonic acid (MSA) in the presence of water, to catalyze EMC in C 2 mixture. Over WMB-22 catalyst (containing H-Beta zeolite with SiO 2 /Al 2 O 3 ratio of 22, 0.32 wt% H 2 O, 0.005 wt% MSA, palladium/1,2-bis(di- tert -butylphosphinomethyl) benzene (d t bpx) complex with Pd/d t bpx/MSA ratio of 1/2/0.5), a superior ethylene conversion of 97.9% and 100% product selectivity, were obtained with C 2 H 6 /C 2 H 4 /CO feeding ratio of 1/2/2. A good linear correlation between C 2 H 4 conversions and the total acid content of H-Beta zeolite and MSA revealed that the synergistic effect between H-Beta zeolite and MSA could enhance C 2 H 4 conversion. Compared with the homogeneous catalyst with Pd/d t bpx/MSA of 1/2/15, under similar C 2 H 4 conversion conditions, the MSA amount of heterogeneous system was 1/30 of homogeneous system, indicating the addition of zeolite could greatly reduce the corrosiveness of system. 31 P nuclear magnetic resonance (NMR) results indicated that the introduction of zeolite, water and MSA could promote the generation and stabilization of active species. 1 H magic angle spinning (MAS) NMR and isotope D-tracing experiments clarified the interaction among Brønsted acid of zeolite, water and methanol, confirming the proposed mechanism pathways. This work provides a facile new method for using H-Beta zeolite and MSA as potential high-performance acid promoters for EMC. Download: Download high-res image (136KB) Download: Download full-size image
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RSC Advances
·
2015
·Vol. 5
·期 68
·54816-54821
·
IF 3.84
Le Zhang,Xingchun Zhou,Hongfei Huo,Wenzhu li,Feng Li,Rong Li
Herein, we introduced a method to encapsulate Pd(0) within TiO2 hollow mesoporous nanostructures. TiO2 hollow spheres offer a number of advantageous characteristics, including low cost, low toxicity, relatively high photocatalytic activity and high chemical stability. In addition, it can also effectively avoid the agglomeration and precipitation of noble metal nanoparticles in the catalytic reaction. The catalyst was characterized by TEM, XRD, XPS, ICP and VSM. We found that the catalyst presented a high activity for HDC of 4-CP under mild reaction conditions. Beyond that, the catalyst could be easily regained by an external magnet from the reaction mixture and recycled seven times without any significant loss in activity.
研究领域:
催化化学
·
环境化学
·
纳米材料
·
化学工程
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Hongyuan Wu,Mohib Ullah,Lin Jiang,Jue Wang,Baihe Sun,Jun Gao,He Lv,Zhuo Liu,Keying Shi
The two-dimensional (2D) g-C 3 N 4 nanosheets have been widely recognized for their great potential in gas sensing. However, the disadvantages brought by layer stacking of two-dimensional nanosheets also seriously affect their performance and application. In this paper, three-dimensional hydrangea-like Pd-ZIF-67/g-C 3 N 4 was prepared for the detection of nitrogen dioxide gas at room temperature via a simple hydrothermal method . The Pd-ZIF-67/g-C 3 N 4 gas sensor exhibited excellent sensing properties with highest sensing response (23.8–100 ppm), ultrafast response speed (0.5 s) and lowest limit of detection (10 ppb) at room temperature. Moreover, it also manifests excellent reversibility and durability, optimal stability and commendable selectivity towards NO 2 gas. This excellent performance is due to the three-dimensional spatial configuration, synergistic effect and catalytic action of Pd . In general, the constructed structure and the proposed design strategy have a certain promoting role in promoting the creation of high performance gas sensors with three-dimensional heterogeneous structures based on two-dimensional nanosheets .
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CATALYSIS LETTERS
·
2023
·Vol. 153
·期 12
·3569-3580
·
IF 2.8
Lin Shanshan,Liu Jianguo,Ma Longlong
Aniline is a group of important platform molecules that has been widely used in the synthesis of other high-value chemicals and pharmaceutical products. How to produce high-value anilines as the high-value chemical intermediates more efficiently and environmentally has always been a research topic in the industry. Catalytic hydrogenation is an environmentally friendly method for preparing halogenated anilines. Traditional noble metal catalysts face the problems of cost and noble metals residue. To improve the purity of the product as well as the activity and recyclability of the catalyst, we prepared a Pd/Fe magnetic bimetallic catalyst supported on N-doped carbon materials to reduce nitrobenzene to aniline under mild conditions. The catalyst has a low Pd loading of 2.35%. And the prepared bimetallic Pd/Fe@N/C catalyst showed excellent catalytic reactivity with the nitrobenzene conversion rate of 99%, and the aniline selectivity of 99% under mild reaction conditions of 0.8 MPa H 2 and 40 °C. A variety of halogenated and aliphatic nitro compounds were well tolerated and had been transformed to the corresponding target amine products with excellent selectivity. In addition, the novel N-doped graphene-encapsulated bimetallic magnetic Pd/Fe@N/C catalyst not only had magnetic physical properties, which was easy to separate, recover, and used for the recycling of the catalyst without metal leaching but also catalyzed highly selective reductive amination of aromatics was a green, economical and environmentally friendly reaction with the only by-product of H 2 O. Graphical Abstract
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高影响因子
危险品化学品经营许可证（带存储）