COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Mariyam Niyaz,Ruxangul Jamal,Tursun Abdiryim,Abdukeyum Abdurexit,Shuyue Xie,Yanyan Song,Nurbiye Sawut,Zulpikar Helil
The support material should have strong adhesion to metal nanoparticles to provide a strong metal-support interaction and improve the performance of catalyst. Herein, we prepared the EDOT-pyridazine-EDOT decorated Double-layered Hollow Carbon Spheres (Poly(EPE)/DLHCs) to use as a new type catalyst support of PtPd alloy nanoparticles which with in different molar ratio. Finally, the Poly(EPE)/DLHCs/PtPd is calcined at high temperature in order to avoid the corrosion of polymer by alkaline solution, and further promote the modification of electronic properties on the surface of metal catalyst by adjacent carbon atoms. The morphological structure of hybrid catalysts are studied by XRD、SEM and TEM analyses, the results indicated that the uniform distribution of PtPd nanoparticles on the Poly(EPE)/DLHCs composite support with the average size of 2.63 and 2.7 nm, respectively. The obtained Poly(EPE)/DLHCs/Pt 2 Pd 1 catalyst exhibits remarkable mass activity (1771.63 mA mg −1 ) and long term stability which were much higher than Poly(EPE)/DLHCs/Pt 1 Pd 2 . The favorable electrocatalytic properties of prepared catalysts can be ascribed to the interaction between Poly(EPE) and carbon spheres, which enables the hybrid catalyst own an excellent microenvironment for electron transfer reactions with the electrolyte solution , and provide more anchoring sites for PtPd alloys by increase the conjugation degree of polymer, indicating the Poly(EPE)/DLHCs can be a promising anode catalyst carrier for DMFCs applications.
研究领域:
材料科学
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电化学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Ying Yang,Xuebo Cao,Lin Huang,Quankun Li,Li Gu,Zheng Yan,Mengli Li,Ruobin Cheng,Zhufeng Lu,Ai-Jun Wang,Wenchao Yang
Electrochemical oxidization of crude ethylene glycol (EG) to fine chemicals driven by sustainable energy is an eco-friendly solution to the upcycling of end-of-life polyethylene terephthalate (PET) wastes. Here, pseudo Ag x -Pt y Pd z core–shell electrocatalyst capable of hybrid oxidation of EG to formate (FA) is designed and synthesized. The trimetallic system consists of Ag nanowire and ultrathin PtPd alloy skin with defects, such as holes and grooves. The defects expose the Ag core to the surroundings and convert Ag 0 to Ag 2+ active species at appropriate potential (> 1.2 V vs RHE). Thus, hybrid EG oxidization reaction is realized on the Ag x -Pt y Pd z electrocatalyst, where PtPd skin catalyzes EG oxidization through conventional Faradaic electrode process owing to inherent activities of Pt and Pd, while Ag 2+ serves as auxiliar oxidant to oxidize EG/intermediates (non-Faradaic reaction). Such a hybrid oxidization strategy reinforces the removal of adsorbates on Ag x -Pt y Pd z electrocatalyst and refresh the active sites timely. Eventually, ultrahigh specific activity (24.45 A mg −1 PtPd ) and long-term stability (> 3000 h at current density ≥ 400 mA cm −2 ) are delivered by the system. The finding of Ag 2+ -enhanced alcohol oxidization reactions introduces a new paradigm for designing high-performance electrocatalysts for energy and environmental applications.
研究领域:
化学工程
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2019
·Vol. 12
·期 2
·638-647
·
IF 6.97
Kaisheng Yao,Chenchen Zhao,Nan Wang,Tianji Li,Weiwei Lu,Jianji Wang
Fine construction of porous bimetallic nanomaterials with tunable components and structures is of great importance for their catalytic performance and durability. Herein, we present a facile and mild one-pot route for the preparation of porous PtPd bimetallic nanoparticles (NPs) with reversed structures in aqueous solution for the first time. To this end, a common ionic liquid (IL) 1-hexadecyl-3-methylimidazolium chloride ([C16mim]Cl) is utilized to direct the growth and assembly of porous structures of PtPd NPs. It is shown that the as-prepared porous Pt25Pd75 NPs have obvious hierarchical structures with nanoflowers as subunits and nanorods as basic units. The elemental components and structures of the porous PtPd NPs can be tuned by the precursor ratio and the [C16mim]Cl concentration. Furthermore, various porous PtPd bimetallic structures from Pd-on-Pt to Pt-on-Pd may be efficiently switched by controlling the concentration of glycine. Owing to their high specific surface area, porous hierarchical structures (including mesopores and micropores), and probable electronic effects between Pt and Pd, the porous Pt25Pd75 NPs (Pd-on-Pt structure) are found to exhibit prominent catalytic activity and high stability for hydrogen production from hydrolysis of ammonia borane.
研究领域:
材料科学
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催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
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2021
·Vol. 188
·期 5
·1-9
·
IF 5.833
Hu Xiaopeng,Xia Yide,Liu Yiwei,Zhao Faqiong,Zeng Baizhao
A novel dual-dummy templates imprinted electrochemical sensor has been fabricated for the detection of patulin. Herein, 2-oxindole (2-oxin) and 6-hydroxynicotinic acid (6-HNA) as the dummy templates, 4-aminothiophenol as functional monomer, and ionic liquid (IL) as electropolymerization electrolyte are employed to prepare molecularly imprinted polymer (MIP) film. 2-Oxin and 6-HNA have multiple groups and the obtained MIP possesses different types of imprinted sites, thereby achieving a better recognition capacity than that of single-dummy imprinted film. ILs can regulate the density of molecularly imprinted film and facilitate effective molecular recognition. The composite of PtPd decorated N-doped porous carbon has good conductivity and large surface area, and can amplify the signal. With the aid of electrochemical probe [Fe(CN) 6 ] 3-/4- (0.16 V vs. SCE) patulin can be detected. Under the optimal conditions, this sensor shows a detection range from 0.01 to 10 μg L −1 , with a detection limit of 7.5 × 10 −3 μg L −1 ( S / N = 3). Two spiked juice samples were analyzed by this method, and the recovery ranges from 94 to 99.8% with RSD values of 2.4–4.6% ( n = 3), indicating that this method can be applied for the detection of patulin in real samples. Graphical abstract
A novel dual-dummy templates imprinted electrochemical sensor is firstly fabricated for the detection of patulin. This sensor exhibits high recognition capacity and sensitivity.
研究领域:
分析化学
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食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2023
·
IF 7.2
Man Zhao,Yanying Jing,He Xiao,Rong Zhang,Xuemin Yang,Li Zhang,Haishun Wu,Jianfeng Jia
The fabrication of low-Pt loading and cost-efficient electrocatalysts still remains a challenge. In this work, a defective PtPd alloy with ultralow Pt content loaded on graphene (PtPd/G-40) is prepared by electrolytic synthesis method . During electrolysis, the formation of PtPd precursors and the exfoliation of graphite are achieved at the anode and cathode of the cell, respectively. The as-prepared PtPd/G-40 shows excellent electrocatalytic activity and stability toward hydrogen evolution reaction (HER) and ethanol oxidation reaction (EOR). Its mass activity is 29.7 times (at −100 mV) and 1.5 times higher than that of commercial Pt/C for HER and EOR, respectively. The ligand effect generated by formation of PtPd alloy and strain effect caused by abundant defects optimize the electronic structure of active Pt, which enhances its intrinsic activity and reduces the activation energy for HER and EOR. This facile synthetic approach generates a new type of graphene supporting defective metal alloy nanostructures as potential electrocatalysts for advanced energy conversion applications.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
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2018
·
IF 4.484
Zhenzhen Wang,Haoyang Zhang,Lili Chen,Songsong Miao,Shujie Wu,Xiufeng Hao,Wenxiang Zhang,Mingjun Jia
In this work, a series of amine-modified ZrSBA-15-supported PtPd bimetallic catalysts with different Pt/Pd ratios were prepared and characterized by a variety of means. Introducing amino groups on the surface of ZrSBA-15 is beneficial for achieving high dispersion of PtPd nanoparticles (NPs) and can effectively prevent the overgrowth of PtPd NPs during the preparation process. The resulting hybrid catalysts exhibit very high catalytic activity and stability for H2 generation from aqueous ammonia borane (AB) and can also efficiently catalyze the reduction of p-nitrophenol to p-aminophenol using AB as the hydrogen source. Among them, the catalyst with the Pt/Pd ratio of 85/15 shows the highest activity for AB dehydrogenation under ambient condition, whereas the catalyst with the Pt/Pd ratio of 50/50 exhibits the highest efficiency for the reduction of p-nitrophenol with AB. These results suggest that highly efficient interface active sites could be constructed by optimizing the composition of bimetallic PtPd NPs and changing the chemical surrounding of mesoporous ZrSBA-15, which demonstrate effective synergistic catalysis for AB dehydrogenation and p-nitrophenol reduction.
研究领域:
材料科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2021
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IF 9.229
Senyao Wang,Baoshan He,Ying Liang,Huali Jin,Min Wei,Wenjie Ren,Zhiguang Suo,Jinshui Wang
Herein, a hierarchically porous Zr-MOF-labeled electrochemical aptasensor based on the composite of PtPd@Ni-Co hollow nanoboxes (PtPd@Ni-Co HNBs) and poly (diallyldimethylammonium chloride)-functionalized graphene (PDDA-Gr) was developed for ultrasensitive detection of chloramphenicol (CAP). PtPd@Ni-Co HNBs have excellent conductivity and provide binding sites for aptamers; the functionalized PDDA-Gr improves its dispersibility and conductivity as a substrate material, which can be successfully used to increase the electrode surface area and support more PtPd@Ni-CoHNBs. Besides, hierarchically porous Zr-MOFs (HP-UiO-66) were utilized as signal probes and showed a stronger load capacity for signal molecules than conventional UiO-66. In the presence of CAP, two ingeniously designed Exo III-assisted cyclic amplification strategies further improved the sensitivity of the aptasensor: CAP causes cycle I to release a large amount of trigger DNA (Tr DNA), and then, Tr DNA initiated cycle II, which causes the exposed capture DNA to further bind the signal probes. With these advantages, the constructed aptasensors performed with satisfactory sensitivity in a wide linear range (10 fM–10 nM) and a detection limit of 0.985 fM. Several signal amplification strategies adopted in this study have effectively improved the performance of the sensor, providing a new avenue for the development of ultrasensitive sensors in the food analysis field.
研究领域:
分析化学
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食品科学
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生物传感技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemNanoMat
·
2021
·Vol. 7
·期 12
·1314-1321
·
IF 3.154
Yingjie Liu,Tong Song,Guanggang Gao,Ping Yang
Graphical PtPd-decorated multibranched Au@Ag nano-heterostructures were successfully synthesized by using a seed growth method and chemical reduction method. By adjusting the distribution position of PtPd nanoparticles, the hydrogen evolution performance of the heterostructure is optimized. These electrocatalysts revealed excellent hydrogen evolution reaction under visible and near infrared light due to the structural effect, photoelectric effect, and photothermal effect. PtPd-decorated multibranched Au@Ag nanocrystals (NCs) were synthesized to form heterostructures with enhanced electrochemical performance for water splitting in the visible/near infrared (vis-NIR) light region. Three kinds of heterostructures including PtPd-covered, PtPd-edged, and PtPd-tipped Multi-branched Au@Ag NCs were fabricated by controlling the growth process of PtPd alloy nanoparticles on Au@Ag NCs. PtPd-covered Multi-branched Au@Ag nanocrystal exhibited the best photo-assisted electrocatalytic activity. The initial overpotential under vis-NIR light is 33 mV with a Tatel slope of 101 mV/dec while the overpotential is 150 mV at 10 mA cm −2 . The enhanced catalyst activity is ascribed to samples with heterogeneous structures and changed morphology and composition. In addition, localized surface Plasmon resonance (LSPR) effect from the surface of samples resulted in the effective separation of electron-hole pairs (photoelectric effect). Finally the photothermal effect generated from the absorbance of Au nanostructures in near-infrared light increased the temperature of the catalyst. The synergy of structure, photoelectricity, and photothermal effect endows the catalyst with excellent photo-assisted electrocatalytic activity.
研究领域:
材料科学
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纳米技术
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Shanshan Liu,Wei Wang,Yanli Hu,Feng Tian,Xiaran Miao,Liangsen Liu,Zhiwei Xu
The development of efficient and durable electrocatalysts is essential for the practical application of fuel cells. Metal-support interaction (MSI) is an important concept in heterogeneous catalysis, which can construct the structure of catalyst and improve the reaction activity and stability of catalyst. Based on this, a simple and efficient method is innovatively proposed to synthesize coral-like special structure catalyst by utilizing the crush capacity of high energy γ-rays and the structure-induced effect of MSI between PtPd alloy and nitrogen-doped graphene quantum dots. The electrocatalyst demonstrates superior long-term durability due to the structure of catalyst is not easy to collapse under suitable MSI. Meanwhile, the unique coral-like structure provides a larger contact area, abundant mass transfer channels, and full exposure of active sites, which are advantageous to improve electrocatalytic activity. The oxygen reduction reaction performance of optimal catalyst (NGQDs 140 -PtPd) was far superior to that of the commercial 20% Pt/C in alkaline medium, including onset potential (959 mV), half-wave potential (860 mV) and stability (the residual current density was 86.5% after long-term stability test). Therefore, coral-like shaped catalysts are expected to become a member of high-efficiency oxygen reduction catalysts in practical applications.
研究领域:
材料科学
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电化学
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催化科学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Ziyue Sun,Hongli Zhao,Kaicha Chen,Fangfang Zhou,Minbo Lan
In this work, the carbon fiber microelectrode (CFME) coated by ERGO-CNT network was used as a substrate to support dendrite PtPd nanoclusters. An enzyme-free O 2 − electrochemical sensor (PtPd@ERGO-CNT-CFME) was prepared based on this strategy. Due to the brilliant loading and dispersing abilities of the substrate and the excellent electrochemical activity of the dendrite PtPd alloy, PtPd@ERGO-CNT-CFME demonstrated outstanding detection ability towards O 2 − . The as-constructed sensor showed a wide-linear range of 16–744 μM and 744–3064 μM with high sensitivity of 6967.3 μA mM −1 cm −2 and 4124.3 μA mM −1 cm −2 , and the detection limit was 5.07 μM. Furthermore, PtPd@ERGO-CNT-CFME was successfully applied to monitor O 2 − released from living cells. This phenomenon indicated the application potential for O 2 − detection in biological samples.
研究领域:
电化学
·
纳米材料
·
生物传感器
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2018
·
IF 2.873
Kang Fu,Yang Wang,Linchang Mao,Xiaoxiao Yang,Junhong Jin,Shenglin Yang,Guang Li
One-dimensional (1D) anisotropic platinum-based nanorods are particularly attractive electrocatalysts for oxygen reduction reaction (ORR) owing to the inherent structural advantages. In this work, we report the growth of ultrathin PtPd alloy nanorods (3–4 nm) on Graphene-Multiwalled carbon nanotube (G–M) hybrid support via a facile surfactant-free and template-free method as the efficient electrocatalyst for ORR. The as-synthesized PtPd NRs/G–M catalyst exhibits more excellent activity and better durability toward ORR than Pt NRs/G and Pt NRs/G–M catalysts. Noteworthily, it shows an outstanding half-wave potential of 0.810 V and mass activity of 49.5 mA mg –1 at 0.85 V, which are 30 mV and 2.1 times higher than those of commercial 40 wt% Pt/C (JM40) catalyst, respectively. After the accelerated durability tests (ADTs), it also maintains superior stability than JM40. The superior performance is attributed to the combination of the advantageous 1D morphological motif and the synergistic effect with G–M support.
研究领域:
材料科学
·
电化学
·
纳米技术
·
催化
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2020
·Vol. 12
·期 15
·1988-1994
·
IF 2.596
Chaoqun Huang,Fengling Zhang,Qingshui Wang,Yao Lin,Jiyi Huang
A new enzyme-free conductometric immunoassay based on bimetallic PtPd hybrid nanostructures was developed for the sensitive determination of lipocalin-2 in renal cell carcinoma. An immunosensor was prepared by immobilizing the capture antibody on an interdigitated micro-comb electrode, whereas bimetallic PtPd hybrid nanostructures were utilized for the conjugation of the detection antibody. Initially, a sandwich immunoreaction was carried out between the capture antibody and detection antibody in the presence of lipocalin-2 on the functional interdigitated micro-comb electrode. Thereafter, the immobilized PtPd bimetallic nanostructures could be used as enzymatic mimics to catalyze the reaction of hydrogen peroxide (H2O2) in 0.01 M phosphate buffer solution (pH 7.4) containing KI, thereby resulting in the local variation in the conductivity of the modified electrode. Several labeling strategies using Pt nanoparticles, Pd nanoparticles and bimetallic PtPd hybrid nanostructures were investigated for the detection of lipocalin-2, and improved analytical features were acquired with PtPd bimetallic nanostructures. With the PtPd labeling method, the factors influencing the analytical performance of the conductometric immunoassay were studied in detail. The strong attachment of biomolecules to the interdigitated micro-comb electrode and PtPd bimetallic nanostructures enabled a good repeatability and intermediate precision down to 10.4%. The dynamic concentration range spanned from 10 pg mL−1 to 30 ng mL−1 with a low detection limit of 5.9 pg mL−1 lipocalin-2 under optimum conditions. The reliability of the conductometric immunoassay was verified for the detection of lipocalin-2 in 4 blood serum and 4 urine samples and matched well with that obtained from the commercial lipocalin-2 enzyme-linked immunosorbant assay kit.
研究领域:
生物传感器
·
纳米技术
·
癌症诊断
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）