Journal of Physical Chemistry C
·
2024
·
IF 3.3
Cuixia Bi,Xiaolong Yin,Zhixiu Wang,Hongyan Zhao,Guangqiang Liu
In this study, trimetallic Au@PdPt nanoparticles (NPs) were synthesized by a seed-mediated technique, possessing a hexoctahedral (HOH) Au core with a branched PdPt alloy shell. The fabrication process involved the synthesis of HOH Au NPs exhibiting high-index {651} facet as nanotemplates, followed by the epitaxial growth of Pd and Pt on these NPs to yield HOH Au@PdPt NPs. The size and composition of HOH Au@PdPt NPs as well as the thickness of PdPt alloy shells (from 2 to 4, 5, and 8 nm) can be precisely adjusted by varying the quantity of Pd and Pt precursors. The catalytic efficacy of these Au@PdPt NPs was significantly enhanced through the synergistic effect between Au, Pd, and Pt, along with the increased contact areas afforded by multibranched PdPt alloy shells. For methanol electro-oxidation, the catalytic activity of HOH Au@PdPt NPs depends on the Pt content showing a distinctive volcano-type pattern. Remarkably, the HOH Au@Pd0.3Pt0.3 NPs demonstrate optimum catalytic performance for methanol oxidation in acidic conditions, exhibiting superior electrocatalytic properties compared to commercial Pt black catalysts. Their ECSA value, mass, and specific activities are 47.21 m2 g–1, 0.93 A mg–1, and 1.97 mA cm–2, respectively. This research can be exploited to fabricate catalysts possessing exceptional properties by precisely designing and controlling the size, composition and morphology of the trimetallic Au@PdPt NPs.
研究领域:
材料科学
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电化学
·
催化
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产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 48
·42008-42013
·
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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产品关联
DOI
高影响因子
ChemElectroChem
·
2018
·Vol. 5
·期 24
·3901-3905
·
IF 4.446
Wen-Tao Kuang,Ze-Li Jiang,Hui Li,Jing-Xuan Zhang,Lin-Nan Zhou,Yong-Jun Li
Graphical Bond breaking and bond making : Au/Pd 63 Pt 37 nanowires are prepared in a one-pot, two-step synthesis. The tri-metallic nanowires are an excellent bi-functional catalyst, capable of electrochemically catalyzing ethanol oxidation (C−C bond breaking) to output electric energy and chemically catalyzing Suzuki coupling (C−C bond formation) to produce new materials. Tri-metallic nanowire catalysts combine the synergistic effect of multiple metals with the geometrical effect of nanowires, exhibiting better catalytic performance than composition-equivalent nanospherical catalysts. However, tri-metallic nanowires are not easily produced directly because of the participation of multiple precursors and the difficulty of selecting capping agents. Herein, we develop a one-pot, two-step synthetic strategy, producing tri-metallic Au/PdPt core/shell nanowires. Moreover, the PdPt shell is an alloy composed of nanoparticles, and its Pd : Pt atomic ratio is easily adjusted by controlling reaction time. The formation of Au/PdPt nanowires is attributed to the initial formation of Au/Pd core/shell nanowire and subsequent galvanic replacement between Pd shell and PtCl 6 2− . As-prepared Au/PdPt nanowires show composition- and structure-dependent catalytic activity and durability for the electrooxidation of methanol and ethanol, and the Suzuki coupling reaction. Optimized Au/Pd 63 Pt 37 nanowire, due to its proper Pd : Pt atomic ratio and porosity of the PdPt shell, exhibits excellent catalytic activity and durability towards methanol and ethanol electrooxidation, ∼18 and 11 times in the specific activity better than that of commercial state-of-the-art Pt/C catalyst, respectively. Moreover, Au/Pd 63 Pt 37 nanowire shows the superior catalytic performance in Suzuki coupling reaction, ∼96 % at yield, far better than commercial state-of-the-art Pd/C catalyst.
研究领域:
材料科学
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催化化学
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产品关联
DOI
高影响因子
CATALYSIS SURVEYS FROM ASIA
·
2021
·Vol. 25
·期 4
·399-405
·
IF 3.106
Xiang Ji,Ju Fan,Sun Man,Jin Hao,Cai Wenjie,Lin Jing,Lu Yanzhen,Dong Xiongzi,Dong Huaze,Wang Fankuo
In this work, we developed a simple and effective one-pot method to synthesize the Pd-based bimetallic nanoparticles (NPs) in the presence of polyvinylpyrrolidone (PVP). By using high-resolution transmission electron microscopy (HRTEM), energy-dispersive spectrometry (EDS) mapping and X-ray diffraction (XRD), the morphologies and compositions of the as-prepared bimetallic NPs were investigated in detail. Furthermore, this approach was also used to achieve the highly dispersive Pd-based bimetallic NPs directly on the carbon black. Significantly, the as-obtained carbon-supported Pd-based bimetallic NPs showed excellent electrocatalytic activity for the methanol oxidation. Among the Pd-based bimetallic NPs and the commercial Pd–C, the PdPt–C displayed the best electrocatalytic activity and stability, which may be mainly attributed to the specific nanostructure and the synergetic effect between Pt and Pd atoms.
研究领域:
材料科学
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电化学
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纳米技术
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 46
·24701-24707
·
IF 14.511
Yu-Chuan Jiang,Yu Ding,Fu-Min Li,Shi-Bin Yin,Dong-Sheng Li,Xi-Fei Li,Yu Chen
The intrinsically sluggish kinetics of Pt towards the formate oxidation reaction (FOR) severely impedes its application in direct formate fuel cells (DFFCs). This study reports the synthesis of ultrafine Pd@PdPt nanowires (NWs) with a Pd–Pt single-atom alloy shell via an atomic galvanic displacement reaction. Pd@PdPt0.024 NWs with optimized composition exhibit a remarkable promoted specific activity of 98.2 A m−2 at 0.59 V towards the FOR, which is a 6.5- and 117.7-fold activity enhancement compared to original Pd NWs and commercial Pt catalysts. Density functional theory (DFT) calculations reveal that the electronic interaction between Pd and Pt as well as the modified Pt coordination environment endow the atomically dispersed Pt active site with an altered d-band structure and unique adsorption properties with a broken scaling relationship. The development of Pd@PdPt0.024 NWs will stimulate deeper insight into the FOR mechanism on Pt and hold promise for practical applications in DFFCs.
研究领域:
材料科学
·
催化化学
·
能源科学
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DOI
高影响因子
Advanced Materials Technologies
·
2025
·
IF 6.2
Chenyi Yuan,Junhao Ma,Xiaowei Cheng,Jinsheng Cheng,Hongxiu Yu,Hualong Xu,Yonghui Deng
Methane (CH 4 ) serves as a commonly utilized fuel gas in various industrial and everyday settings. Given its flammable, explosive, and greenhouse gas nature, the real-time monitoring of its concentration in the air holds vital importance across practical applications. The tetrahedral structure of methane molecules features high bond energies, posing a significant challenge for chemical detection over metal oxide-sensitive layers. In this research, a multicomponent assembly method is used to synthesize ordered mesoporous tin oxide (SnO 2 ) with uniform large mesopores (≈ 10 nm) and pore wall functionalized with Pd x Pt nanoalloys (≈ 2.5 nm), and due to the unusual C–H bond activation capabilities of Pd x Pt nanoalloys and semiconducting properties of mesoporous SnO 2 , the obtained Pd 2 Pt@m-SnO 2 is used to fabricate gas sensors which showcases a wide applicability range in detecting concentrations ranging from 50 to 20 000 ppm at 400 °C, and it yields a substantial CH 4 response of 9.19 (1000 ppm) and an ultralow limit of the detection value of 175.9 ppb. Furthermore, the sensor is successfully incorporated into a portable device, evidencing its capability for accurate CH 4 detection in real-world scenarios.
研究领域:
材料科学
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化学传感器
·
环境监测
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产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2022
·
IF 8.008
Guojuan Zhang,Yujie Han,Zhiguang Liu,Lifang Fan,Yujing Guo
A triple-amplified and ratiometric electrochemical aptasensor for CA125 was designed based on hemin–graphene/SH-β-cyclodextrin@PdPt nanoflower (H-Gr/SH-β-CD@PdPtNF) composites and an exonuclease I (Exo I)-assisted strategy. In the nanocomposite, hemin acts as an internal reference signal owing to the reversible heminox/heminred pair. PdPtNFs can significantly improve the electron transfer rate. SH-β-CD can efficiently enrich quercetin probes through host–guest recognition and increase the second indicator signal. In the presence of CA125, due to the specific binding between the aptamer and CA125, the conformational change of dsDNA (designed by the CA125 aptamer and its complementary DNA) results in the release of quercetin embedded in dsDNA. Subsequently, the free quercetin and DNA fragments are enriched on the H-Gr/SH-β-CD@PdPtNF-modified electrode. Thus, an enhanced oxidation peak from quercetin (IQ) and a reduced peak from hemin (Ihemin) can indicate the same biological identification event. In addition, the recycling amplification of CA125 by Exo I can effectively assist the increase of the quercetin signal. The value of IQ/Ihemin is linear with the concentration of CA125 in the range from 6.0 × 10–4 to 1.0 × 103 ng/mL, and the limit of detection is 1.4 × 10–4 ng/mL. The recovery of CA125 in human blood serum samples was from 99.2 to 104.4%. The proposed sensor is sensitive and reliable, which provides an avenue for the development of triple amplification and ratiometric signal strategies for detecting tumor markers in clinical diagnostics.
研究领域:
生物医学工程
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临床诊断
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Science China-Materials
·
2018
·Vol. 61
·期 5
·697-706
·
IF 4.318
Zhang Yuan,Zhang Jinfeng,Chen Zelin,Liu Yunwei,Zhang Mengmeng,Han Xiaopeng,Zhong Cheng,Hu Wenbin,Deng Yida
This paper demonstrates a one-pot approach to produce highly dispersed dendritic palladium-platinum bimetallic nanoparticles (NPs) with small particle size, tunable composition and high catalytic activity. Herein, the PdPt bimetallic NPs have been obtained using bayberry tannin (BT) as both the reducing agent and surfactant. Additionally, the PdPt bimetallic NPs with different Pd/Pt atomic ratios can be prepared by just varying the amounts of the Pd and Pt precursors. Most importantly, the as-prepared Pd 52 Pt 48 catalyst exhibits the optimal catalytic activities compared with the other compositional PdPt NPs (Pd 82 Pt 18 , Pd 69 Pt 31 , and Pd 36 Pt 64 ) and commercial Pt/C (20 wt.%) catalyst for the methanol oxidation reaction (MOR). Meanwhile, Pd 52 Pt 48 also shows better CO tolerance, which can be attributed to the unique dendritic structure and the synergistic effect between Pd and Pt. With evident advantages of the facile preparation and enhanced catalytic performance, it holds great promise as a high-performance catalyst for electrochemical energy conversion.
研究领域:
纳米材料
·
电化学
·
催化
·
能量转换
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2021
·Vol. 8
·期 9
·2280-2287
·
IF 6.569
Yangyang Ren,Chuanliang Li,Baosong Li,Fan Gao,Xinghua Zhang,Xiaojing Yang,Lanlan Li,Zunming Lu,Xiaofei Yu
Here, PtPd nanoframes were prepared by etching Pd@PdPt core–shell rhombic dodecahedrals (RDs) with Fe3+ provided by iron chloride hexahydrate (FeCl3·6H2O). Based on the experimental results, PtPd nanoframes were formed due to the etching of Pd cores. In terms of catalytic performance, the measured specific activity and mass activity of PtPd nanoframes were 1.11 mA cm−2 and 840.38 mA mg−1, respectively, which were much higher than those of Pd@PdPt core–shell RDs, Pt black and Pt/C, suggesting the preeminent activity of PtPd nanoframes. Meanwhile, PtPd nanoframes showed better stability compared with Pd@PdPt core–shell RDs, Pt black and Pt/C. The strengthened catalytic properties may be caused by the larger surface area owing to the novel structure and the strong electronic interaction between Pt and Pd.
研究领域:
材料科学
·
化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Haijie Cai,Xingyu Wang,Jingting Han,Yayao Song,Jingwen Wang,Zhaomin Gao,Tianjun Ni,Yongheng Zhu
Gas sensors for detecting foodborne pathogen biomarkers offer a promising approach to enhance food safety monitoring. However, sensors based on conventional sensing materials often lack the requisite sensitivity for trace-level pathogen metabolites. Herein, PdPt/ZnO hollow concave nanocages are rationally designed through a surface-tailored strategy to achieve rapid and ultrasensitive detection of the Listeria monocytogenes biomarker 3-hydroxy-2-butanone at ultralow concentrations. The representative 1%PdPt/ZnO-based sensor exhibits superior sensing properties: high response (R a /R g = 92.8@5 ppm), rapid response/recovery kinetics (14/15 s), ultralow detection limit (20 ppb), excellent selectivity, and over 30-day stability at an operating temperature of 150 °C. The combination of ex-situ / in-situ characterization and DFT calculations reveals that the hollow concave nanocage morphology synergistically activated by PdPt bimetallic sites dramatically increases active site density, accelerates oxygen diffusion, and lowers the reaction energy barrier, thereby enabling the efficient adsorption and conversion of oxygen species and 3-hydroxy-2-butanone. Crucially, the sensor enables rapid response of Listeria monocytogenes in actual food samples and distinguishes it from other foodborne pathogens, demonstrating its significant potential for accurate, real-time, and non-invasive monitoring of Listeria monocytogenes contamination.
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DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2013
·Vol. 19
·期 41
·13720-13725
·
IF 5.831
Zhongyuan Huang,Haihui Zhou,Feifei Sun,Chaopeng Fu,Fanyan Zeng,Tianqi Li,Yafei Kuang
Graphical Totally tubular : PdPt bimetallic nanotubes with diameters of 10–20 nm and lengths of several micrometers were facilely prepared by self-assembly at room temperature (see figure). The as-prepared PdPt nanotube catalysts have not only high activity but also good stability for ethanol oxidation in alkaline medium. PdPt bimetallic nanotubes were prepared by the self-assembly of Pt and Pd on Te nanowires at room temperature. The morphologies of the as-prepared PdPt nanotubes were investigated by scanning electron microscopy and transmission electron microscopy, and the results display a large amount of PdPt bimetallic nanotubes with a diameter of 10–20 nm and a length of several micrometers. The composition and structure of the nanotubes were characterized by X-ray diffraction, high-resolution transmission electron microscopy, scanning transmission electron microscopy, and energy spectrum analysis, and the results display uniform compositional distributions of both elements (Pd and Pt). The mechanism of the formation of the nanotube structure was supposed. The electrocatalytic performance of PdPt nanotubes were studied by cyclic voltammetry and chronoamperometry. Electrochemical results show that the as-prepared PdPt nanotube catalysts have not only high activity but also good stability for ethanol oxidation in alkaline medium.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
DOI
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
·
分析化学
·
临床检验
✓ 已验证
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）