NEW JOURNAL OF CHEMISTRY
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2021
·Vol. 45
·期 14
·6550-6559
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IF 3.591
Xiuqi Dong,Shixiang Lu,Wenguo Xu,Shuguang Li
A composite of bimetallic micro/nanostructured palladium–platinum (Pd–Pt) alloy, reduced graphene oxide (rGO) and polydopamine (PDA) on three-dimensional nickel foam (NF) was obtained by chemical immersion method and anneal method for ethanol electrocatalysis. The key points of the synthesis method are employing PDA as an adsorbent of graphene oxide (GO), rGO with a high specific surface area as the carbon carrier of the Pd–Pt alloy after annealing, and NF as the secondary substrate. Scanning electron microscopy revealed that Pd–Pt particles with dendrite-like micro/nanostructure are well dispersed on the surface of rGO, which provide a great deal of catalytic sites. The structure and phase characterization were determined by X-ray diffraction. The diffraction peaks of bimetallic catalysts are shifted in comparison with those of two monometallic catalysts, which prove the formation of the Pd–Pt alloy. The lattice strain and electronic effect of Pd–Pt alloy micro/nanostructured particles lead to the improvement of the electrocatalytic properties of materials. In the electrochemical measurement, the composite of the Pd–Pt alloy with appropriate atomic ratio, rGO, PDA and NF (Pd6Pt@GPN) provided the largest electrochemically active surface area and the highest peak current density with significantly enhanced cycling stability in the forward scan toward EOR in alkaline medium among all catalysts prepared. Thus, this Pd6Pt@GPN catalyst highlights the potential application in the anode catalyst of a direct ethanol fuel cell.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2021
·
IF 5.455
Dan Yu,Yufei Feng,Jing Jin,Qian Liu,Lu Tao,Junshuang Zhou,Li Hou,Faming Gao
A bstract One-dimensional (1D) Pt-based nanotubes (NTs) are widely studied as a promising class of ORR electrocatalysts . A rational porosity for wall of nanotubes could lead to higher atomic utilization and better mass transportation. To confirm this speculation, we prepare a novel class of PdPt porous nanotubes with sub-nano Pt-shell. Their ESCA of 95 m 2 g −1 and mass activity of 2.29 A mg Pt −1 are distinctly greater than that of the Pt nanotubes with perfect wall (91.45 m 2 g −1 and 2.09 A mg Pt −1 ), and are 14.3 and 9.6 times higher than those of commercial benchmark Pt/C catalyst, respectively. The prolonged electrocatalytic durability is also shown. The improved performance can be ascribed to a combination of alloying and unique geometry (one dimension and nanotubes with porous walls).
研究领域:
材料科学
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电化学
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DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 48
·42008-42013
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IF 3.289
Lihua Jin,Zaihua Zhang,Zhihua Zhuang,Zheng Meng,Cong Li,Yehua Shen
One-dimensional (1D) bimetallic nanowire materials have attracted much more attention in electroanalysis because of their unique physical and chemical properties. In this work, we further extended the application field of the PdPt bimetallic alloy nanowires (PdPt BANWs) structure and successfully fabricated a novel PdPt BANWs-based electrochemical sensor for sensitive detection of ascorbic acid (AA). It was found that the PdPt BANWs on the electrode exhibited remarkable electrocatalytic activity toward AA oxidation and could be used for sensitive detection of AA in a wide linear range (0.01–0.97 mM) with a high sensitivity of 467.9 μA mM−1 cm−2. The detection limit is as lower as 0.2 μM (S/N = 3). Moreover, the electrochemical sensor also exhibited good selectivity, reproducibility and stability, and had been successfully applied to detection of AA in serum samples and commercial vitamin C tablets with satisfactory results.
研究领域:
分析化学
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材料科学
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生物医学工程
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DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2016
·Vol. 16
·期 3
·3014-3020
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IF 1.338
Liu Xing-Quan,Chen Xue-Song,Wu Jian,Yao Lei
Three-dimensional (3D) Pd–Pt alloy with coral-like nanostructures were synthesized via bubble dynamic templated electrodeposition method at room temperature. The morphology of the asprepared nanostructures was characterized using scanning electron microscopy (SEM), EDS, high-resolution
transmission electron microscopy (HRTEM), respectively. Cyclic voltammetry method was adopted to evaluate the electrocatalytic activities of the synthesized electrodes toward oxygen reduction in KCl solution. The electrochemical results indicated that the Pd–Pt alloy with coral-like
nanostructures hold the high performance for oxygen reduction.
研究领域:
材料科学
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电化学
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纳米技术
✓ 已验证
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Keda Bao,Siyi Qiu,Wentian Wang,Chao Yang,Wei Wang,Xiaoli Wang,Qijun Wang,Jiawen Yin,Qinghui Jin,Jiawen Jian,Jie Zou
The new palladium nanoparticles (Pd NPs) based carrier-free catalytic combustion hydrogen (H 2 ) sensor presents a promising potential for H 2 energy vehicle due to excellent vibration and low power consumption. However, the sintering of the Pd NPs at elevated temperatures decreases the sensitivity, limiting the applications of these sensors. To enhance the durability of Pd NPs based carrier-free catalytic combustion H 2 sensor, palladium-platinum alloy nanoparticles (PdPt NPs) was fabricated on the filament by a co-electrodeposition method. The impact of morphology and composition of PdPt NPs on the sensing performance was systematically investigated. The results indicated that Pt atoms in the alloy can restrict the mobility of Pd atoms, which may reduce the sintering between particles at elevated temperatures. Compared to a pure Pd NPs H 2 sensor, the PdPt NPs H 2 sensor demonstrated superior sensitivity and linearity and their low power consumption and durability were significantly improved.
研究领域:
材料科学
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传感器技术
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能源工程
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产品关联
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 114
·94456-94461
·
IF 3.84
Zhen Zhang,Yanzhou Jiang,Maoqiang Chi,Zezhou Yang,Ce Wang,Xiaofeng Lu
Herein, we report the fabrication of polyacrylonitrile (PAN) nanofibers supported Pd–Pt alloy nanoparticles (PAN/Pd–Pt) through a simple and reliable approach by combining an electrospinning technique and in situ reduction process. The resulting PAN/Pd–Pt membranes are composed of a well-defined fiber-like structure with uniform sizes. Pd–Pt alloy nanoparticles are well dispersed on the surface of PAN nanofibers and the composition of alloy nanoparticles can be regulated through adjusting the feed molar ratio of Na2PdCl4 and K2PtCl4. The obtained products are characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) measurements. The as-prepared PAN/Pd–Pt composite exhibits a remarkable catalytic performance towards the hydrogen generation from the hydrolysis of ammonia borane (NH3BH3, AB). By tuning the composition of the alloy nanoparticles of the nanocatalyst, a turnover frequency (TOF) of 51.9 mol H2 min−1 (mol Pd–Pt alloy)−1 was achieved, much higher than Pd and Pt-based nanocatalysts. In addition, the as-prepared PAN/Pd–Pt composite nanofibers show good recycling stability, as the catalyst can be easily separated from the suspension system. The electrospun nanofiber membrane supported noble metal nanoalloy catalysts shows high potential to find applications for the development of hydrogen generation for clean energy.
研究领域:
材料科学
·
能源化学
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产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2017
·
IF 7.78
Qiqi Yuan,Junlin He,Yazhen Niu,Jun Chen,Yilin Zhao,Yuchan Zhang,Chao Yu
α2,3-sialylated glycans (α2,3-sial-Gs) are one of the significant tumour biomarkers for the early diagnosis of cancer. In this work, a neoteric sandwich-type biosensor was developed for detecting α2,3-sial-Gs using 4-mercaptophenylboronic acid (4-MPBA) to construct a novel molecular recognition system by the coordination of a boron atom of 4-MPBA to the amide group of Neu5Ac in the α2,3-sial-Gs structure. Amino-functionalized fullerene coupled with palladium-platinum bimetallic alloy nanocrystals (n-C 60 -PdPt) was synthesized to modify the surface of a glassy carbon electrode (GCE) because the n-C 60 nanomaterial affords a large surface area for the on-site reduction of bimetallic alloy nanoparticles and an excellent capacity for electron transfer . Abundant 4-MPBA were immobilized on the n-C 60 -PdPt, since the 4-MPBA has the mercapto group can combine with PdPt alloy through strong adsorption. Maackia amurensis lectin (MAL) was covalently immobilized on Au-poly (methylene blue) (Au-PMB) acting as the signal amplification components, which was used to recognize the α2, 3-sial-Gs specifically like a second antibody linked on Au-PMB. The differential pulse voltammetry (DPV) current response of the biosensor in 5 mL of PBS (0.1 M, pH = 7.4) was recorded, and the proposed sandwich-type biosensor showed a wide linear range of 10 fg mL −1 −100 ng mL −1 as well as, a low detection limit of 3 fg mL −1 (S/N = 3). Furthermore, the proposed method exhibited good recovery and stability, indicating its potential for use in clinical studies.
研究领域:
生物化学
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医学诊断
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2017
·
IF 7.78
Yan Li,Junlin He,Jun Chen,Yazhen Niu,Yilin Zhao,Yuchan Zhang,Chao Yu
In this study, a dual-type responsive electrochemical immunosensor was developed for the quantitative detection of proprotein convertase subtilisin/kexin type 9 (PCSK9), a potential biomarker of cardiovascular disease in serum. N-doped graphene nanoribbons (N-GNRs) with good conductivity were used as the sensing matrix modifying the glassy carbon electrode. Palladium platinum alloy (PdPt) nanoparticles with high catalytic performance toward the reduction of hydrogen peroxide (H 2 O 2 ) were reduced onto amino-functionalized fullerene (n-C 60 -PdPt) and significantly amplified the electrochemical signal recorded by the amperometric i-t curve. Furthermore, staphylococcus protein A (SPA) with antibody orientation function was introduced to improve the immunoreaction efficiency. Accordingly, a label-free immunosensor was fabricated based on n-C 60 -PdPt/N-GNRs for the quick detection of PCSK9. Meanwhile, to realize ultrasensitive detection of PCSK9, Pt-poly (methylene blue) (Pt-PMB) nanocomposites synthesized by a one-pot method for the first time were used as a novel signal label, which exhibited uniform morphology as well as good conductivity and produced an electrochemical signal recorded by differential pulse voltammetry (DPV). Herein, a novel sandwich-type immunosensor was designed using n-C 60 -PdPt/N-GNRs as the sensing matrix and Pt-PMB as the signal label for sensitive detection of PCSK9. Under optimal conditions, the label-free immunosensor showed a linear range of 10 pg mL −1 to 100 ng mL −1 with a detection limit of 3.33 pg mL −1 (S/N=3), and the sandwich-type immunosensor exhibited a linear range of 100 fg mL −1 to 100 ng mL −1 with a detection limit of 0.033 pg mL −1 (S/N=3) for PCSK9 detection, indicating its potential application in clinical bioassay analysis.
研究领域:
生物医学工程
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分析化学
·
临床检验
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）