COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Huanming Wang,Jinqiao Hou,Chong Li,Xinge Cui,Chenze Lu,Fujian Ren,Chen Fu,Jingting Luo,Ran Tao
Non-invasive monitoring of exhaled isopropanol (IPA) is a promising route for diabetes management. However, current analytical methods are limited by inadequate sensitivity, low selectivity, and slow response times. In this work, we report a high-performance surface acoustic wave (SAW) gas sensor engineered with Pt-doped ZnO nanoparticle films synthesized via hydrothermal growth and spin-coating. The sensitive layer is optimized with 0.5 wt% Pt doping level, which enhances the specific surface area and pore structure uniformity. At room temperature (25°C), the sensor demonstrates exceptional performance, featuring highly selective IPA detection with a sensitivity of 6.76 Hz/ppm, fast response/recovery times of 12 s/12 s, a low detection limit of 1.38 ppm, and excellent reproducibility over 30 days of operation. Mechanistic studies confirm that the high selectivity is governed by a Pt-O coordination effect that facilitates preferential IPA adsorption. This work presents a robust and practical platform for diabetes monitoring and provides a clear strategy for the rational design of next-generation metal oxide-based gas sensors.
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Materials
·
2026
·Vol. 19
·期 1
·194
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IF 3.2
Yu Gao,Lipeng Wang,Kun Li,Yongbo Ji
In this work, V-Pt-Ti catalysts were synthesized employing impregnation (IP), precipitation (PC), sol-gel (SG), thermal decomposition (TD), and hydrothermal (HD) methods. A systematic study has been carried out to investigate impacts of various preparation methods on the performance of NH3selective catalytic oxidation (SCO) at temperatures from 150 °C to 450 °C. N2adsorption/desorption, XPS, XRD, H2-TPR, NH3-TPD, O2-TPD, SEM, TEM, and in situ DRIFTS were adopted to characterize the physico-chemical property of V-Pt-Ti catalysts. The results suggested that V-Pt-Ti catalysts synthesized by precipitation methods (denoted as VPT-PC) exhibited notably better SCO performance across the 150–450 °C temperature range compared with those produced by impregnation (IP), sol-gel (SG), thermal decomposition (TD), and hydrothermal (HD) methods. The outstanding performance of the VPT-PC catalyst could be ascribed to its larger surface area, higher relative contents of Pt0, V5+, and Oα, more abundant surface acid sites, and better redox property. In situ DRIFTS results suggested that NO2species could participate in NH3oxidation reaction on the surface of the VPT-PC catalyst, which was beneficial for improving the SCO activity.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Zhiyuan Jiang,Fan Zhao,Chong Li,Ruihao Wang,Xiaoqi Feng,Mengke Li,Zongqi Wang,Siyi Liu,Kaixuan Yao,Lingmin Yu,Hairong Wang
In-situ growth of NiO nanowalls on MEMS micro-hotplates secures Ohmic contact. • Pt doped into the NiO lattice intrinsically anchors oxygen vacancies. • The device achieves exceptional 60-day stability and 98% RH moisture resistance. • Rapid and ultraselective acetone sensing enables non-invasive diabetes screening. Non-invasive breath acetone analysis offers a promising approach for continuous diabetes monitoring. However, poor long-term stability and material-electrode interfacial drift in p-type metal oxide sensors remain key bottlenecks for their clinical translation. To address these challenges, a Micro-Electro-Mechanical-System (MEMS) acetone sensor was developed via the in-situ growth of Pt-doped NiO nanowalls on a micro-heater chip. Unlike conventional surface modification and physical coating methods, the intrinsic doping of Pt within the NiO lattice and its integration with the substrate address signal drift through a synergistic dual mechanism. Specifically, the in-situ growth minimizes contact resistance drift at the material-electrode interface. Simultaneously, intrinsic Pt lattice doping anchors the active sites, suppressing catalyst thermal agglomeration and preserving structural stability at the gas-solid interface. The optimized sensor exhibits a response of 10.3 to 100 ppm acetone at 200 °C (a 5.7-fold enhancement over pure NiO) and a response time of 37 s. Furthermore, the device demonstrates continuous stability over 60 days and steady-state reliability at the 1.8 ppm clinical diagnostic threshold. It also shows stable moisture resistance (up to 98% relative humidity), maintaining typical p-type characteristics without response reversal phenomena. Supported by competitive co-adsorption density functional theory (DFT) calculations, this moisture tolerance is attributed to a favorable adsorption energy that prioritizes acetone chemisorption over water molecules. Comprehensive characterizations and DFT models indicate that Pt doping triggers localized lattice distortions and charge compensation, increasing the surface oxygen vacancy concentration (35.2%). This theoretically broadens the hole accumulation layer (HAL) and facilitates single-molecule acetone adsorption (−1.12 eV), stabilizing the p-type conduction mechanism. This work provides a stable, drift-resistant acetone sensor capable of sub-ppm trace detection for non-invasive diabetes screening. Download: Download high-res image (204KB) Download: Download full-size image
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ACS Sensors
·
2026
·
IF 10.9
Xinxin He,Ping Guo,Yinhua Hu,Xuyang An,Shuai Liang,Tiezhu Liu,Tong Zhang,Guohua Cai,Yanjie Chu,Jia Zhang
Exhaled human breath contains disease-related biomarkers, enabling non-invasive medical diagnostics. Small intestinal bacterial overgrowth (SIBO) is traditionally diagnosed through hydrogen measurement, a method that offers limited specificity and sensitivity. Herein, we introduce a simplified Pt/Pd-SnO2 electronic composed of using only two sensing materials to achieve multi-gas detection. By simultaneously monitoring H2, CO, ethanol, and acetone, the system provides a more informative diagnostic profile than conventional single-marker tests. Furthermore, the electronic nose employs dual operating temperatures (135 and 190 °C) to enhance gas discrimination. Machine learning-assisted signal processing further optimizes the system’s ability to differentiate gases, enabling more accurate detection in clinical settings. It achieves a 93% classification accuracy and a mean squared error of 0.78 for gas concentration estimation. Importantly, the system was validated using real clinical breath samples collected after lactulose ingestion, where SIBO patients exhibited markedly elevated responses (7.62−18.77) compared to healthy individuals (2.45−4.91). This clinically validated, multi-gas platform offers improved accuracy and practical potential for SIBO diagnosis.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
·
IF 19.7
Xincheng Cao,Jiaxi Li,Yao Zhang,Shiyu Wu,Yuwei Chen,Jun Ye,Xiaolei Zhang,Junming Xu,Jianchun Jiang
Redox-active WOₓ support regulates Pt dispersion and metal–support interactions. • Abundant Pt–WOₓ interfacial sites enable efficient fatty acid hydrogenolysis. • The high activity results from the synergy between Pt, oxygen vacancy and Brønsted acid sites. • The studies provide insights into the active sites of hydrogenolysis of carboxylic acids. The uniform dispersion of noble metals on the surface of metal oxides has attracted increasing attention because it can enrich interfacial active sites and often induce unexpected catalytic behaviors. While extensive efforts have been devoted to enhancing metal dispersion, the role of the support itself remains comparatively underexplored. Here, we report how the redox properties of the support (WO 2.72 ) can be used to improve the metal dispersion and stability, enabling remarkably efficient hydrogenolysis of bio-derived fatty acids. Using stearic acid as a model substrate, the Pt/WO x (R) catalyst, synthesized through the in-situ reduction of WO 2.72 , achieved 95% conversion with 97% selectivity to n -octadecane ( n -C 18 ) under mild conditions of 200 °C and 1.0 MPa H 2 . In sharp contrast, the conventional Pt/WO x (C) catalyst prepared from WO 3 exhibited negligible activity, affording only 5% conversion under identical conditions. Detailed characterization revealed that Pt nanoparticles were highly dispersed on the WO x support surface in Pt/WO x (R), generating abundant Pt−WO x interfacial sites that results in high catalytic activity. Moreover, due to the anchoring effect of defective WO x support on the Pt species, this allows the Pt/WO x (R) catalysts to retain its activity over three cycles without obvious deactivation. This research presents an effective strategy and valuable mechanistic insights for the rational design of highly efficient hydrodeoxygenation catalysts with abundant metal-support interfacial sites. Download: Download high-res image (204KB) Download: Download full-size image
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2026
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IF 4.6
Yuan Jin,Yanhong Zhang,Nanke Ma,Guangli Li
A novel Pt/TiO 2 /MWCNT-COOH nanocomposite was fabricated for ultrasensitive fleroxacin detection. • The synergistic effect of MWCNT-COOH and Pt/TiO 2 effectively prevents nanoparticle agglomeration and enhances electron transfer. • The sensor exhibits a wide linear range (0.01–10 μM), a low detection limit (0.002 μM), and excellent anti-interference capability. • Long-term stability of 90.3% after 25 days demonstrates outstanding practical durability. • Successful application in tap water and milk samples with recoveries of 98.4%–105.1% confirms real-world feasibility. A novel electrochemical sensor based on a Pt/TiO 2 /MWCNT-COOH nanocomposite was developed for the ultrasensitive detection of fleroxacin (FLX). To construct this platform, Pt/TiO 2 nanoparticles were first synthesized via a hydrothermal method and then uniformly anchored onto carboxylated multi-walled carbon nanotubes through ultrasonic-assisted dispersion. Various characterizations confirmed the successful formation of this heterogeneous structure, which effectively mitigated nanoparticle agglomeration and provided a significantly expanded electroactive area. As a result of this unique architecture, the Pt/TiO 2 /MWCNT-COOH/GCE exhibited substantially enhanced electrocatalytic activity toward FLX oxidation compared to bare and single-component modified electrodes, an improvement attributed to the synergistic effect between the excellent conductivity of MWCNT-COOH and the high catalytic activity of Pt/TiO 2 . Under optimized conditions, the sensor demonstrated a wide linear range (0.01–10 μM), a low limit of detection (0.002 μM), as well as remarkable anti-interference capability, good reproducibility, and long-term stability (sustained 90.3% for 25 days). Benefiting from these outstanding analytical properties, the sensor was successfully applied to detect FLX in tap water and milk samples, achieving satisfactory recoveries ranging from 98.4% to 105.1%. These results highlight its significant potential for antibiotic residue monitoring in complex real-world samples. Scheme 1. Schematic representation of the fabrication of Pt/TiO 2 /MWCNT-COOH/GCE for the sensitive determination of FLX. A Pt/TiO 2 /MWCNT-COOH nanocomposite was constructed as an electrochemical sensing platform for fleroxacin (FLX). The three-dimensional conductive network effectively prevents nanoparticle agglomeration and provides abundant active sites. The sensor achieves a wide linear range (0.01–10 μM), low detection limit (0.002 μM), and excellent stability (90.3% after 25 days). Successful FLX detection in tap water and milk demonstrates its practical application potential. Download: Download high-res image (119KB) Download: Download full-size image
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MICROCHEMICAL JOURNAL
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2026
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IF 5.2
Xiaodong Lu,Xiaoze Dong,Mingwei Qin,Yating Song,Teng Wang,Xiang Han,Qiaodie Wang,Mengyan Zhang,Zhouping Wang,Junsong Yang
Dual-mode sensor uses CeO 2 NR@Pt and Mg 2+ -dependent DNAzyme for AFB 1 detection with broad linear range and low LODs. • Signal amplification via CHA and DNAzyme cycling boosts sensitivity and specificity. • CeO 2 NR@Pt show strong peroxidase activity, PEI/rGO@AuNRs enhance electrode performance. • Practical tests in peanuts and corn confirm high recovery rates and stability for real-world use. This study developed a dual-mode colorimetric/electrochemical aptasensor for detecting aflatoxin B1 (AFB 1 ) in food, utilizing cascade amplification of bipedal Mg 2+ - dependent DNAzyme and catalytic hairpin assembly (CHA). The system employed CeO 2 nanorods (CeO 2 NRs) as blocking probes for toluidine blue (TB), with in-situ Pt modification enhancing peroxidase-like activity. Gold nanorods (AuNRs) and polyethyleneimine-modified reduced graphene oxide (PEI/rGO) served as substrate materials to optimize the sensing platform. After amplification, electrode-captured CeO 2 NRs@Pt blocked TB charge transfer while enabling colorimetric detection via peroxidase activity. The sensor achieved wide linear ranges (1 × 10 −4 -1 × 10 2 ng/mL electrochemical; 1 × 10 −1 -5 × 10 2 ng/mL colorimetric) with low detection limits (3.7 × 10 −5 ng/mL and 5.6 × 10 −2 ng/mL, respectively). The method demonstrated excellent specificity, stability, and recovery rates in real-sample analysis, offering a robust approach for food safety monitoring. Download: Download high-res image (101KB) Download: Download full-size image
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Catalysis Science & Technology
·
2026
·
IF 4
Qin Zhao,Ruize Sun,Xiaonan Liu,Lexi Tang,Jingge Chen,Jicheng Zhou,Wentao Xu
Propane direct dehydrogenation (PDH) is an important way to prepare propylene (C3H6). However, the conventional thermal catalytic process often has the problems of high reaction temperature and side reactions such as carbon deposition, which makes it difficult to balance the conversion of C3H8 and the selectivity of C3H6. In this work, a new method for direct dehydrogenation of low-temperature and high-efficiency propane (C3H8) to C3H6 by microwave catalysis was proposed, and a Pt-Co/SiBeta+SiC microwave catalyst was developed. The results showed that microwave catalysis significantly improved the C3H8 conversion and C3H6 selectivity of the catalyst, and effectively reduced the reaction temperature. Under 450 °C lowtemperature microwave catalysis (MCRM), the initial conversion of C3H8 was as high as 50.4%, and the initial selectivity of C3H6 was as high as 97.2%. Both are significantly better than the 5.9% initial conversion and 95.6% initial selectivity under conventional thermal catalysis (CRM). It was further found that the microwave irradiation significantly reduced the apparent activation energy of the catalyst from 164.4 kJ•mol -1 under CRM to 68.4 kJ•mol -1 under MCRM. This work provides a new idea for the development of low-temperature and high-efficiency PDH catalytic system, and shows the application potential of microwave catalysis in light hydrocarbon conversion.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Bochen Zhao,Meiyu Shi,Zequn Zhang,Yuan Shu,Pengfei Zhang
Inverse Pt valence shift (Pt 4+ /Pt 2+ → Pt 0 ) on CaCO 3 during reaction. • Pt valence state depends on CaCO 3 crystal phase (vaterite, calcite, aragonite). • CaCO 3 facets tune surface Ca 2+ /CO 3 2- ratio, directing electron transfer to Pt. • Reaction mechanism shifts from Mars–van Krevelen to Langmuir–Hinshelwood pathway. • New paradigm of metal-support interaction on defect-free ionic solids. Unlike conventional metal oxide supports, the metal–support interactions (MSI) involving ionic crystals such as alkaline earth carbonates (e.g., CaCO 3 ) remain largely unexplored. Herein, we report an inverse transformation from PtO x to Pt 0 in the Pt/CaCO 3 system—a behavior distinctly different from that observed on conventional oxide supports like Pt/CeO 2 . Notably, this dynamic reduction from Pt 4+ to Pt 0 is highly crystalline-dependent: it is most pronounced on vaterite-supported Pt, while negligible on the more stable calcite and aragonite phases. XPS shows that the coordination of Pt with Ca–CO 3 ionic pairs correlates with CaCO 3 phase, governing electron transfer from the support to Pt. Such crystalline-dependent valence modulation enhances reactant co-adsorption and promotes low-temperature propene combustion, enabling synergistic MvK and L–H mechanisms, as corroborated by kinetic and isotopic data. This work introduces a new paradigm for tailoring electronic metal–support interactions (EMSI) on CaCO 3 –type ionic crystals. Download: Download high-res image (295KB) Download: Download full-size image
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CHINESE JOURNAL OF CATALYSIS
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2026
·
IF 17.2
Yao-Yao Xie,Chang-Long Tan,Liang Mao,Zi-Rong Tang,Yi-Jun Xu
The hydroxyethyl radical (•CH(CH 3 )OH)-mediated pathway, by avoiding the formation of aldehyde intermediates, constitutes a promising approach for the highly selective photocatalytic synthesis of benzimidazoles from ethanol and o -phenylenediamine. However, inefficient reactant adsorption and activation, as well as severe recombination of photogenerated charge carriers of traditional photocatalysts, impose a fundamental challenge for this reaction pathway. Herein, we construct an oxygen vacancy (V O )-rich Nb 2 O 5 decorated with Pt nanoparticles (NPs), which exhibits the highest photocatalytic activity to date, with production rates of 4.0 mmol g −1 h −1 for 2-methylbenzimidazole and 10.2 mmol g −1 h −1 for H 2 , respectively. The synergistic interaction between V O and Pt NPs markedly promotes the migration and separation of photogenerated charge carriers. The electron-accumulating Pt NPs drive efficient H 2 evolution through proton reduction, while the engineered V O sites enhance ethanol adsorption and selectively activate α-C–H bond cleavage to generate •CH(CH 3 )OH radicals, suppressing the accumulation of N-ethyl-2-methylbenzimidazole by-products inherent to conventional aldehyde-mediated reaction pathways, significantly facilitating the co-production of benzimidazoles and H 2 . This work achieves directional pathway regulation via rational design of semiconductor defects and metal co-catalysts, establishing a radical-mediated strategy for efficient and selective green synthesis of N-heterocyclic compounds.
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高影响因子
FUEL
·
2026
·
IF 7.8
Bohan Zhang,Chang Wen,Zhaoxi Ye,Haozhuo Huang,Qingsong Hua,Ke Liu,Tianyu Liu,Zijian Zhou,Zhengkai Tu
Developing highly efficient and durable bifunctional electrocatalysts for both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in acidic environments is vital for advancing proton exchange membrane water electrolysis (PEMWE) technology. Herein, we report the design and synthesis of a three-dimensional Pt-RuO 2 -based catalyst supported on reduced graphene oxide (rGO), denoted as 3D Pt-RuO 2 /rGO, which exhibits outstanding bifunctional electrocatalytic activity by tuning its electronic structure and the binding strength of reaction intermediates. The 3D porous architecture not only facilitates fast charge transfer and mass transport of the catalysts but also increases the exposure of active sites. Remarkably, 3D Pt-RuO 2 /rGO delivers low overpotentials of only 200 mV for OER and 14 mV for HER at 10 mA cm −2 in 0.5 M H 2 SO 4 . It also enables overall water splitting (OWS) at a cell voltage as low as 1.48 V at 10 mA cm −2 , outperforming conventional noble metal-based materials (NMBs). Furthermore, a 3D Pt-RuO 2 /rGO||3D Pt-RuO 2 /rGO MEA delivered a low cell voltage of 1.549 V at 1 A cm −2 and maintained stable operation for 300 h in a PEM single-cell electrolyzer. Operando differential electrochemical mass spectrometry (DEMS) shows that the OER of 3D Pt-RuO 2 /rGO under acidic conditions follows the adsorption evolution mechanism (AEM). Density functional theory (DFT) calculations further reveal the synergistic interaction between oxygen vacancies and the metal/oxide heterointerface. This interface-vacancy synergy not only facilitates the exposure of abundant active sites, but also promotes electron transfer from Pt to RuO 2 , thereby optimizing the kinetics of water dissociation. This work provides valuable insight into the rational design of bifunctional electrocatalysts for high-efficiency acidic water electrolysis and highlights the potential of 3D heterostructured materials for future PEMWE systems.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 8.3
Weiyi Bu,Zhengtong Ji,Lu Zheng,You Zhou,Na Liu,Wenjiang Han,Zhengwu Liu,Yangyu Guo,Xiaohong Chuai,Yongfu Zhu,Geyu Lu
Single-atoms (SAs) supported on inorganic materials have been confirmed as effective active sites in catalytic chemical reaction. For metal oxide semiconductor (MOS) based gas sensors, the core is the catalytic reaction process of gas molecules with adsorbed active oxygens on sensing materials. In order to prepare gas sensing material with high performance, herein, we reported highly atomically dispersed Pt functionalized oxygen vacancies enriched ZnO nanowires (Pt 1 /ZnO-O v ) via simple impregnation method. Gas sensing tests revealed that Pt 1 /ZnO-O v based gas sensor exhibits a high N 2 H 4 sensing performance. Pt SAs on ZnO increase the number of active sites, resulting in high response, good selectivity and rapid response speed to N 2 H 4 gas. N 2 H 4 -TPR and N 2 H 4 -TPD tests showed that Pt 1 /ZnO-O v has stronger oxygen and N 2 H 4 adsorbability. In addition, DFT results indicated that the oxygen vacancies on ZnO-O v facilitate Pt atoms incorporation into surface Zn sites, and Pt incorporation promotes N 2 H 4 adsorption across the sensor. In a word, enriched oxygen vacancies ZnO nanowire decorated with atomically dispersed Pt is an efficient sensing material for selective detection of N 2 H 4 .
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