ACS Applied Nano Materials
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2025
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IF 5.5
Rui Yang,Jian Wu,Jaafar Abdul-Aziz Mehrez,Xue Liu,Yaozong Zhai,Xiao Li,Yuyang Wang,Jianhua Yang,Nantao Hu,Min Zeng,Hao Zhu,Zhi Yang
To address the energy crisis and mitigate greenhouse gas emissions, substantial investments are advancing hydrogen (H2) technologies. Reliable, efficient room-temperature H2 sensors are critical for ensuring safe H2 production and utilization. Here, we report a palladium/palladium oxide (Pd/PdO) nanosheet composite capable of detecting H2 concentrations as low as 0.5 ppm at room temperature. The sensor exhibits exceptional stability, maintaining this detection limit after four months under ambient conditions. The superior H2 sensing performance stems from two key features: (1) the ultrathin nanosheet morphology, which offers abundant reactive sites, and (2) Pd nanoregions that enhance chemical and electronic sensitization. Together, these attributes synergistically elevate room-temperature H2 detection. This work demonstrates a promising strategy for advancing H2 sensor performance, supporting the transition to a hydrogen-based economy.
研究领域:
材料科学
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传感器技术
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DOI
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 14
·1188
·
IF 4.4
Hongyang Wu,Chen Chen
The efficient detection of n-butanol, which is in demand for highly sensitive materials, is essential for multiple applications. A nonaqueous method was applied to prepare NiFe2O4nanoparticles (NPs) using benzyl alcohol as a solvent, which shows a size of 7.9 ± 1.6 nm and a large surface area of 82.23 m2/g. To further improve the sensing performance for n-butanol, Pd/PdO functionalization was sensitized with NiFe2O4NPs. Gas sensing results demonstrate that the Pd/PdO-NiFe2O4exhibits an enhanced response of 36.9 to 300 ppm n-butanol and a fast response and recovery time (18.2/17.6 s) at 260 °C. Furthermore, the Pd/PdO-NiFe2O4-based sensor possesses a good linear relationship between responses and the n-butanol concentration from 1 to 1000 ppm, and great selectivity against other volatile organic compounds (VOCs). The excellent sensing enhancement is attributed to the catalytic effects of Pd/PdO, the increase of oxygen vacancies, and the formation of heterojunction between PdO and NiFe2O4. Thus, this study offers an effective route for the synthesis of Pd/PdO-functionalized NiFe2O4NPs to achieve n-butanol detection with excellent sensing performance.
研究领域:
材料科学
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化学传感器
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DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2024
·
IF 10.8
Yu Wang,Qian-Yuan Wu,Min-Yong Lee,Yu-Jia Nong,Wen-Long Wang,Jörg E. Drewes
Electrocatalytic hydrodechlorination is a promising approach for simultaneous pollutant purification and valorization. However, the lack of electrocatalysts with high catalytic activity and selectivity limits its application. Here, we propose a palladium–palladium oxide (Pd-PdO) heterostructure for efficient electrocatalytic hydrodechlorination of recalcitrant chlorophenols and selective formation of phenol with superior Pd-mass activity (1.35 min–1 mgPd–1), which is 4.4 times of commercial Pd/C and about 10–100 times of reported Pd-based catalysts. The Pd-PdO heterostructure is stable in real water matrices and achieves selective phenol recovery (>99%) from the chlorophenol mixture and efficient detoxification along chlorophenol removal. Experimental results and computational modeling reveal that the adsorption/desorption behaviors of zerovalent Pd and PdO sites in the Pd-PdO heterostructure are optimized and a synergy is realized to promote atomic hydrogen (H*) generation, transfer, and utilization: H* is efficiently generated at zerovalent Pd sites, transferred to PdO sites, and eventually consumed in the dechlorination reaction at PdO sites. This work provides a promising strategy to realize the synergy of Pd with different valence states in the metal–metal oxide heterostructure for simultaneous decontamination, detoxification, and resource recovery from halogenated organic pollutants.
研究领域:
环境科学
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催化化学
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DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2014
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IF 6.007
Xingfa Li,Xin Liu,Lili Xu,Yuezhong Wen,Jianqing Ma,Zucheng Wu
Heterogeneous Pd catalytic Fenton-like systems with in-situ-generated H 2 O 2 have recently gained significant attention for wastewater treatment. Intense research efforts have been focused on developing highly efficient Fenton-like catalysts. It is known that nanoparticle size and appropriate coordination of active compositions are important for the fabrication of a highly efficient multicomponent catalyst. Unfortunately, effects of these factors on Fenton-like reaction are still unknown. To decipher the puzzle, we designed multicomponent Pd/PdO/Fe 2 O 3 nanoparticles in SBA-15 (denoted as FePd-SBA) as a Fenton-like catalyst which possesses uniform and highly dispersed nanoparticles (small size about 5 nm) in space-confined channels of SBA-15. The fabricated catalyst shows high catalytic activities in Fenton-like reaction for dye degradation. For example, 98.6% removal of dye Acid Red 73 was obtained under in-situ generation of hydrogen peroxide. In contrast, when the catalyst loaded on SiO 2 without channels or pores (FePd–SiO 2 ) was prepared, and compared with FePd–SBA, FePd–SiO 2 showed noticeably poor performance (51.6%) under same conditions. Obviously, such a difference in results is due to the confinement effect of SBA-15 porous channels. It was also found that Fe and Pd played important roles in the synergistic effect, that is, Pd worked in in-situ H 2 O 2 generation and Fe species worked in decompose H 2 O 2 to degrade organic pollutants. When we applied this catalyst for Fenton-like reaction with addition of H 2 O 2 , it was also found that Pd and PdO played important roles and the synergistic effect between Fe and Pd species actually existed in dye removal. The unique nanostructure makes the catalyst to be a novel and welcoming choice for H 2 O 2 favorite reactions.
研究领域:
环境科学
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催化化学
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材料科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2020
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IF 4.939
Yuan Zhou,Xun Zhu,Biao Zhang,Ding-Ding Ye,Rong Chen,Qiang Liao
Formic acid as a renewable fuel can be converted to clean electricity in fuel cells by high-efficient electrochemical oxidation . The conversion rate is fundamentally dictated by the synergy of interactive aspects: catalytic activity , accessibility to active sites, electron transfer , and anti-poisoning stability. For the first time, ordered mesoporous carbon (OMC) is used as the substrate for Pd–PdO catalyst for fuel cells. The unique ordered pore-channel network of OMC can enhance the spatial dispersion of Pd nanoparticles on the pore-channel wall, while the hollow pore-channel can facilitate reactant transport. Microwave and annealing treatments are found to enhance the chemical reduction and to strengthen the anchoring of Pd–PdO catalyst on OMC substrate, respectively. The OMC supported Pd–PdO catalyst (Pd–PdO/OMC) shows 1.7-fold and an order of magnitude higher mass activity and stability as compared to commercial Pd/C catalyst. For fuel cell testing, the Pd–PdO/OMC catalyst is applied to an air-breathing microfluidic fuel cell and achieves a maximum power density of 63.0 mW cm −2 , at least one-fold higher than similar previous reports.
研究领域:
材料科学
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能源科学
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电化学
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DOI
高影响因子
VACUUM
·
2025
·
IF 3.9
Xiaohua Wang,Yanwei Li,Xinhui Jin,Guang Sun,Jianliang Cao,Yan Wang
The pressing need for health and environmental protection has sparked significant interest among researchers in exploring gas sensors made from metal oxide semiconductors (MOSs). Herein, a co-modification approach involving palladium (Pd) and palladium oxide (PdO) is introduced to enhance the sensing properties of indium oxide (In 2 O 3 ) to hydrogen sulfide (H 2 S). Pd and PdO co-modified In 2 O 3 hierarchical porous nanocubes (Pd/PdO-In 2 O 3 HPNCs) were synthesized using a facile hydrothermal method. With the theoretical doping amount of 2 mol%, the synergistic effect of metal Pd and PdO-In 2 O 3 heterojunction made Pd/PdO-In 2 O 3 show excellent sensing performance to H 2 S compared to In 2 O 3 . Specifically, the material features a lower operating temperature (280 vs 300 °C), higher sensitivity (95.06 vs 28.59 to 20 ppm H 2 S; 2.28 vs 1.17–100 ppb H 2 S), and better selectivity (7.41 vs 2.32 times to triethylamine), while also demonstrating satisfactory reproducibility and stability. The synergistic sensitization mechanism of noble metal catalysis and heterojunction in Pd/PdO–In 2 O 3 HPNCs, along with their underlying mechanism, was discussed. Integrating noble metal modification with heterojunctions adds complexity to the structure and composition of the material. The synergistic effects of these two sensitization strategies on the H 2 S sensitization mechanism need further in-depth investigation.
研究领域:
材料科学
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化学传感器
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纳米技术
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环境监测
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半导体物理
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DOI
高影响因子
Molecular Catalysis
·
2023
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IF 4.6
Mengling Dong,Tao Li,Jiacheng Xu,Tiantian Zhang,Yan Sun,Ning Li,Zuliang Wu,Jing Li,Erhao Gao,Jiali Zhu,Shuiliang Yao,Yong Huang
Methane (CH 4 ) is the second largest greenhouse gas; its emission should be controlled. A plasma reactor coupled with a catalyst was used to control CH 4 emission via oxidation. Compared with the traditional catalytic process, the activity of Pd/ZrO 2 /Al 2 O 3 catalyst is significantly improved, the light-off temperature ( T 50 ) is at a level of 290 °C. X-ray photoelectron spectroscopy characterization results proved that synergetic effect of plasma and catalysis on CH 4 oxidation was due to the increase in the amount of lattice oxygen on zirconia after plasma oxidation and the enhancement of the oxidation of Pd 0 to PdO on 1.0Pd/10ZrO 2 /γ-Al 2 O 3 catalyst. An operando plasma diffuse reflectance infrared Fourier transform spectroscopy mass spectrometer was used to demonstrate that CH 4 oxidation on Pd/ZrO 2 /Al 2 O 3 catalyst. It was found that 1.0Pd/10ZrO 2 /γ-Al 2 O 3 with plasma can efficiently promote CH 4 oxidation and convert surface formate and carbonate to gaseous CO 2 and H 2 O. The plasma-generated O atoms can react with surface H 2 O to yield reactive OH radicals which can obviously improve CH 4 oxidation at a temperature higher than 130 °C, this finding provides important enlightenment for the development of catalysts for plasma catalytic oxidation of CH 4 . The mechanism of CH 4 plasma-catalysis oxidation was discussed.
研究领域:
环境科学
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催化
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等离子体化学
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材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Qi Zhao,Fei Wu,Junyi Wang,Pengyuan Gao,Kaimin Shih
A non‑aqueous separation strategy that combines acetonitrile (ACN) with 1, 3‑propanediol (PDO) is presented for the 90 yttrium(III)/ 90 strontium(II) (Y(III)/Sr(II)) separation. In an initial dissolution step, the ACN-PDO mixture displays a pronounced solubility contrast between Y nitrate (1.22 g/100 g) and Sr nitrate (0.09 g/100 g), enabling the selective dissolution of trace Y(III) while Sr(II) remains largely undissolved. Furthermore, ACN-PDO mixture also exhibits favorable physicochemical properties, e.g., relatively low viscosity (about 40 mPa·s), a suitable density difference (0.25 g/cm 3 ) from n -octane, and lower miscibility with n -octane, for constituting an extraction system with N,N,N’,N’ tetra-octyl-3-oxopentanediamide in n -octane, in which both Y(III) extraction efficiencies and separation factors greatly exceed those of aqueous-based extraction systems. Density functional theory calculations also confirmed that the Y/Sr separation is more favorable in ACN-PDO/ n -octane systems compared to water/ n -octane systems due to differences in solvation effects and contact ion pairs. A practice integrated separation process achieved a Y(III) recovery of >90 % with product purity exceeding 99 %. The overall decontamination factor (>460,000) is markedly higher than the values reported for existing aqueous‑based methods.
研究领域:
核化学
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放射化学
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分离科学
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溶剂萃取
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环境化学
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产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2025
·
IF 6.3
Xiaoqin Jiang,Meiling Chen,Jiyang Zuo,Tao Yang,Caiqi Liu,Kangpeng Liu,Siqi Yu,Fei Liu,Jinggang Wang,Jin Zhu
Bio-based materials provide solutions with both ecological benefits and technical feasibility for replacing traditional petroleum-based materials. This study focused on poly(propylene 2,5-furandicarboxylate) (PPF), a fully bio-based polyester with promising gas barrier properties. However, the lack of mechanical properties has become a key bottleneck in its packaging applications. Aiming at the problems of low molecular weight of PPF, Poly (propylene 2,5-thiophenedicarboxylate) (PPTh) oligomer prepared from 2,5-thiophenedicarboxylic acid and 1,3-propanediol was used to modify PPF, and high molecular weight poly(propylene 2,5-thiophenedicarboxylate-co-2,5-furandicarboxylate) (PPThF) copolyesters were prepared by melt polycondensation. The experimental results exhibited excellent CO 2 and O 2 barrier properties of up to 29.0 and 9.3 times compared with those of PET, respectively. Crucially, a brittle-ductile transition occurs without sacrificing barrier properties (elongation at break increases from 4.6% to 29%). These findings indicate that the material has the potential for packaging materials.
研究领域:
高分子材料
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包装材料
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生物基聚合物
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材料科学
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阻隔性能研究
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聚合物改性
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DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 25
·17440-17447
·
IF 3.9
Kai Lu,Xinyi Shen,Yunhai Shi,Zejian He,Dahong Zhang,Mi Zhou
The Biginelli reaction, a three-component cyclocondensation reaction, is an important member of the multicomponent reaction (MCR) family. In this study, we conducted end-group modifications on a variety of biodegradable polyesters, including poly(1,4-butylene adipate) (PBA), poly(ε-caprolactone) (PCL), polylactic acid (PLA), and poly(p-dioxanone) (PPDO), based on the precursor polyethylene glycol (PEG). By combining two polymers through the Biginelli multi-component reaction, four new biodegradable polyester copolymers, namely DHPM–PBA, DHPM–PCL, DHPM–PLA, and DHPM–PPDO, were formed. These Biginelli reactions demonstrated exceptional completeness, validating the efficiency of the synthesis strategy. Although the introduction of various polyesters lead to different properties, such as crystallinity and cytotoxicity, the newly synthesized 3,4-dihydro-2(H)-pyrimidinone compounds (DHPMs) exhibit enhanced hydrophilicity and can self-assemble in water and N,N-dimethylformamide (DMF) solution to form micelles with a controllable size. Furthermore, DHPM–PPDO promotes cellular growth and has potential applications in wound healing and tissue engineering. In conclusion, this method demonstrates great universality and methodological significance and offers insights into the medical applications of polyethylene glycol.
研究领域:
材料科学
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生物学
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医学
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DOI
PubMed
高影响因子
Nature Synthesis
·
2025
·
IF 20
Wu Bei,Liu Xiaocheng,Liu Peigen,Wu Geng,Tian Lin,Han Xiao,Li Junmin,Hong Xun
Amorphous metal oxide (AMO) nanomaterials are attractive because of their unique short-range order structure, but controllable synthesis is still challenging. Here we report a Li + -assisted liquid-phase reduction method, which converts a series of crystalline metal oxides into amorphous structures (RuO x , PtO x , CuO x , NiO x , PdO x , MnO x and NiCoO x ). Taking RuO 2 as an example, in situ Raman and X-ray absorption spectroscopy indicate that the reduction of Ru–O coordination number and distortion of the medium-range structure of Ru–Ru during the amorphization process are caused by naphthalene radical anions and lithium ions. Theoretical calculations indicate that Li⁺ insertion in RuO x strengthens its electrostatic interaction with the naphthalene radical anion, accelerating the stripping of oxygen from Li⁺-inserted RuO x . The introduction of positive charge by Li⁺ insertion can disrupt the internal charge balance of crystal ruthenium oxide, and therefore reduce the formation energy of intermediates for producing amorphous RuO x . This strategy paves a way for achieving the controllable synthesis of AMOs.
研究领域:
材料科学
·
化学
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产品关联
DOI
高影响因子
IEEE SENSORS JOURNAL
·
2026
·
IF 4.5
Weiwei Qin,Xuefeng Hu,Ming Zhou,Jilei Yang,Jiaming Liu,Peipei Li,Xiaoliang Wang,Liping Tan,Yali Bi,Wenjuan Yu,Wei Zhang
The detection of hydrogen-methane (H2-CH4) in exhaled breath takes on paramount importance for small intestinal bacterial overgrowth (SIBO) diagnosis. However, the concentrations of H2 and CH4 associated with SIBO are significantly lower, reaching only 20 and 12 ppm, respectively. Furthermore, the detection of these gases can be compromised by the presence of various volatile organic compounds (VOCs) and relative humidity (RH) in exhaled breath. In this study, a low-powered system with three high-performance tin dioxide (SnO2)-based micro-electro-mechanical system (MEMS) gas sensors for H2-CH4-VOCs detection was modified by magnetron sputtering deposition and coating, which are named as Pd/SnO2-M (M means magnetron), Pd/SnO2-C (C means coating), and SnO2-D (D means multiple doping), respectively. Particularly, the Pd/SnO2-M sensor shows excellent selectivity, high sensitivity, and low detection limitation (down to 0.033 ppm) toward H2, which is attributed to the compact grains of the film and the Pd catalysis for the dissociation of H2 molecule into two active hydrogen atoms better than other gases. In addition, the Pd/SnO2-C sensor exhibits high sensitivity and low detection limitation toward H2 (down to 0.186 ppm) and CH4 (down to 1.1 ppm) since doped Pd also gives rise to adsorbed oxygen species (Oads) above the SnO2 surface besides its catalysis. Moreover, the assembled MEMS sensor array system demonstrates gas recognition capability based on linear discriminant analysis (LDA) under controlled single-gas conditions in high-humidity environments. Then, the as-modified MEMS sensor array system is a promising platform for H2-CH4 detection.
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PubMed
高影响因子
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