JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2015
·Vol. 162
·期 6
·H415
·
IF 3.266
Mingshu Xiao,Xiaocai Liang,Weiwei Li,Yang Yang,Yuqing Miao
Here, the ultrafine Pt/Pd bimetallic nanoparticles (Pt/Pd NPs) were synthesized and decorated on the multi-walled carbon nanotubes (MWCNTs) modified glassy carbon electrode (GCE) for hydrogen evolution. Pt/Pd NPs were synthesized through the reduction of their metal salt mixture with tert-butylamine as reductant and polyvinylpyrrolidone as protectant. Under the observation of transmission electron microscopy (TEM), the well dispersed Pt/Pd NPs exhibit the ultrafine size of about 13 nm diameter with the good crystallinity corresponding to the (111) planes of face-centered cubic (fcc) Pt and the (200) planes of fcc Pd. The scanning electron microscopy (SEM) also shows the dispersion and anchor of Pt/Pd NPs in the matrix of MWCNTs. Electrochemical study confirms the good electrocatalytic hydrogen evolution of Pt/Pd-MWCNT in 0.5 M H2SO4, exhibiting a potential application in the future for hydrogen based energy transformation and storage.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Lingling Li,Yingliang Feng,An Pei,Lihua Zhu,Weizhen Wang,Guang Li,Chengxiu Huang,Zhiqing Yang,Hengqiang Ye
Different atomic ratios of PtPd alloy nanoparticles (NPs) supported on carbon doping with nitrogen-NC (Pt x Pd y /NC) are successfully prepared to simultaneously enhance hydrogen evolution reaction (HER) and methanol oxidation reaction (MOR), in which Pt 5 Pd 5 /NC with an atomic ratio of 5:5 has the best performance. Pt 5 Pd 5 /NC exhibits a significantly reduced HER overpotential (12 mV@10 mA cm −2 ) and the mass activity (MA) for MOR is up to 6.85 A mg −1 PtPd , 11.61 and 34.25 times higher than that of commercial Pt/C (Pt/C-JM) and commercial Pd/C (Pd/C-JM), respectively. Remarkably, coupling boosted HER on the cathode with accelerated MOR on the anode, efficient H 2 generation is achieved. This two-electrode flow cell only requires a cell voltage of 1.100 V at 100 mA cm −2 and can be stably operated for >300 h at 1.960 V with impressive long-life stability. Such performance even outperforms that of (IrO 2 ) OER‖HER (Pt/C-JM) cell. Electrochemical in-situ Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) analysis show that electronic effect is formed between N and PtPd and can oxidize the intermediate HCOO - at a lower potential (0.300 V), promote the desorption of the toxic intermediates and improve the catalytic property.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2024
·
IF 1.3
Sitian Zhao,Long Chen,Wenjie Luo,Zijie Pi,Xin Zhang,Rongqin Yang,Xiaoling Yang,Yuanyuan Zhang,Xiaoling Liao
Hydrogen peroxide (H 2 O 2 ) is widely distributed in living organisms and the environment, and its concentration is closely associated with human health. Therefore, the development of an efficient and sensitive detection method for H 2 O 2 is imperative. In this study, a PtPd nano-enzyme composite was electrodeposited onto a platinum wire microelectrode (ME) using a one-step electrochemical deposition method to fabricate an H 2 O 2 electrochemical sensor (PtPd/ME) with exceptional performance. The successful modification of PtPd on the electrode surface was confirmed by scanning electron microscopy (SEM) and X-ray energy dispersive spectroscopy (EDS). Chronoamperometry (i-t) was employed to investigate various technical parameters including sensitivity, detection limit, detection range, reproducibility, and anti-interference capability. The results demonstrate that the sensor exhibits a sensitivity of 11.94 mA M -1 cm -2 with a detection limit of 0.034 μM and a wide linear range from 31.25 μM to 4.15 mM while also demonstrating excellent anti-interference properties. These superior performances can be attributed to the strong catalytic activity towards H 2 O 2 provided by PtPd nanoparticles as well as the fast electron transfer rate facilitated by microelectrodes. Furthermore, this sensor effectively enables real-time monitoring of H 2 O 2 released by ascorbic acid-stimulated vascular endothelial cells and demonstrates its potential for detecting H 2 O 2 in contact lens care solutions. These findings provide valuable insights for food and drug testing, and demonstrate great potential for monitoring key pathological processes within living cells.
研究领域:
生物化学
·
分析化学
·
医学检测
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2014
·Vol. 3
·期 6
·2770-2775
·
IF 0
Muhua Luo,Yuanchen Hong,Weifeng Yao,Cunping Huang,Qunjie Xu,Qiang Wu
The synthesis of colloidal Pt and Pt alloy nanoparticles (NPs) requires surfactants and capping agents to inhibit the overgrowth and aggregation of NPs. These reagents are also needed in the shape control synthesis of NPs to vary crystal growth rates in selected directions. Polyvinylpyrrolidone (PVP) is one of the most common water soluble capping agents for use in the synthesis of colloidal particles. However, PVP strongly adsorbed onto the surface of nanoparticles is detrimental when the NPs are used as catalysts, because surface adsorbed PVP blocks the access of reactant molecules to the active sites of nanoparticles. In this paper, we report a facile NaBH4/tert-butylamine (TBA) treatment technology for the effective removal of PVP from the surface of colloidal Pt–Pd nanocubes (NCs). This method does not change the morphology of the NPs. After treatment, the catalytic activity of Pt–Pd NCs significantly improves due to greater particle surface areas available for catalytic reactions. This facile method will find extensive applications in the fields of fuel cells, water electrolysis and photocatalytic hydrogen production.
研究领域:
材料科学
·
催化化学
·
燃料电池技术
✓ 已验证
DOI
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Pei Song,Lei Liu,Ai-Jun Wang,Xi Zhang,Si-Yuan Zhou,Jiu-Ju Feng
In this work, three-dimensional trimetallic Pt–Pd–Co alloyed nanoflowers are fabricated by a facile one-pot solvothermal strategy, with the assistance of oleylamine as the solvent, surfactant, and reducing agents, along with cetylpyridinium chloride (CPC) as the co-surfactant and shape-directing agents. Their morphology and crystal structure were investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning transmission electron microscope (STEM), and X-ray photoelectron spectra (XPS) in details. The respective electrochemically active surface area (ECSA) is estimated to be 32.53 m 2 g −1 , and current density is 132.91 mA cm −2 for the electrooxidation of ethylene glycol (EG). These values are much higher than those of PtPdCo nanoparticles, PtPd nanoparticles, commercial Pt black, and Pd black under the identical conditions, showing the improved catalytic activity of Pt–Pd–Co nanoflowers. The excellent performances are attributed to the specific structure and synergistic interactions of the trimetallic alloy. The as-prepared nanoflowers can serve as a promising electrocatalyst in fuel cells.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Chuanliang Li,Fan Gao,Yangyang Ren,Baosong Li,Lanlan Li,Zunming Lu,Xiaojing Yang,Xinghua Zhang,Xiaofei Yu
Metallic ultrathin nanosheets have drawn increasing attention due to their distinct properties and wide applications. Nonetheless, the successful preparation of metallic ultrathin nanosheets is still a huge challenge because metallic bonds have no direction and tend to form three-dimensional close-packed structures. Here, ultrathin curved PtPdMo nanosheets (UC-PtPdMo NSs) were obtained by controlling the anisotropic growth kinetics through the CO released from Mo(CO)6. Meanwhile, different doses of PVP and CTAB could induce the formation of ultrathin porous PtPdMo NSs (UP-PtPdMo NSs) and ultrathin PtPdMo NSs (U-PtPdMo NSs). Among them, UC-PtPdMo NSs had the optimal catalytic activity for oxygen reduction reaction (ORR), and its specific and mass activities were 4.1 and 3.6 times as large as those of Pt/C. Moreover, it showed better stability than the other catalysts after 10k cycles. The strengthened catalytic properties might have resulted from the ultrathin structures and the electronic adjustment of Pt by Pd and Mo elements.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2014
·
IF 4.086
Jie-Ning Zheng,Li-Li He,Fang-Yi Chen,Ai-Jun Wang,Meng-Wei Xue,Jiu-Ju Feng
In this work, bimetallic alloyed platinum-palladium (PtPd) nanoflowers are fabricated by one-pot solvothermal co-reduction of Pt (II) acetylacetonate and Pd (II) acetylacetonate in oleylamine system. The as-prepared nanostructures show the enhanced electrocatalytic activity for oxygen reduction reaction (ORR), dominated by a four-electron pathway based on the Koutecky-Levich plots, mainly owing to the inhibition of the formation of Pt–OH ad via the downshift of d-band center for Pt. Meanwhile, PtPd nanoflowers display good methanol tolerance and improved stability for ORR. The chronoamperometry test reveals that the current of PtPd nanoflowers remains 45.9% of its original value within 6000 s, much higher than those of commercial Pt (36.7%) and Pd (32.2%) black catalysts. Therefore, PtPd nanoflowers with unique interconnected structures can be used as a promising cathode catalyst in direct methanol fuel cells.
研究领域:
材料科学
·
化学工程
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2015
·Vol. 7
·期 13
·5699-5705
·
IF 7.394
Jing-Jing Lv,Li-Ping Mei,Xuexiang Weng,Ai-Jun Wang,Li-Li Chen,Xiang-Feng Liu,Jiu-Ju Feng
A facile one-pot solvothermal method was developed for the fabrication of well-defined three-dimensional highly branched Pt–Pd alloyed multipods, using ethylene glycol as a solvent and a reducing agent, along with N-methylimidazole as a structure-directing agent, without any seed, template, or surfactant. The as-prepared nanocrystals exhibited a relatively large electrochemically active surface area, improved electrocatalytic activity and superior stability for ethylene glycol oxidation in alkaline media, compared with commercial Pt black and Pd black, making them promising electrocatalysts in fuel cells.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Research Express
·
2017
·Vol. 4
·期 7
·075022
·
IF 1.068
Yuanxu Sun,Xiaoqing Zhu,Dandan Guo,Xiao Chen,Jingtao Dai
Platinum and palladium bimetal nanoparticles on ferroferric oxide (PtPd/Fe3O4 NPs) nanocomposite catalysts were successfully synthesized with polyvinyl pyrrolidone as a stabilizing agent. The resultant samples were characterized by x-ray diffraction, x-ray photoelectron spectroscopy, transmission electron microscopy, high-resolution transmission electron microscopy, inductively coupled plasma, and magnetic studies. The catalytic performance of the PtPd/Fe3O4 NPs in the Heck and Suzuki coupling reactions was evaluated. Results showed that the cubic phase of Pt and Pd bimetal nanoparticles coexists with that of Fe3O4. The PtPd/Fe3O4 NP catalysts, which were approximately 22 nm in size, showed excellent catalytic activity in the Heck and Suzuki reactions. Moreover, the catalyst can be recovered with a magnet and reused several times without the significant loss of catalytic activity.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
Chemistry-An Asian Journal
·
2021
·Vol. 16
·期 9
·1130-1137
·
IF 4.568
Ling Shen,Jie Ying,Ge Tian,Mingpu Jia,Xiao-Yu Yang
Graphical A facile solvothermal method is presented to synthesize ultralong PtPd alloyed nanowires anchored on graphene as highly effective MOR catalysts. The rational synthesis of Pt-based alloyed nanowires still remains a great challenge because of the different reduction potentials between Pt and another metal and the intrinsic feature of isotropic growth in face-centered cubic (fcc) structured Pt. In this work, PtPd alloyed nanowires with ultrahigh aspect ratio anchored on graphene (PtPd NWs/graphene) were synthesized by a facile solvothermal method without the use of any templates or surfactants. Due to the integration of ultralong PtPd nanowires and stable graphene support, PtPd NWs/graphene exhibited outstanding electrochemical activity toward methanol oxidation reaction (MOR) in comparison with pure Pt NWs/graphene and commercial Pt/C catalysts. Meanwhile, PtPd NWs/graphene had a much higher current density than Pt NWs/graphene and commercial Pt/C catalysts at a constant potential for 7200s in alkaline methanol solution. Moreover, after 1000 cycles of durability testing, PtPd NWs/graphene retained 89.2% of its initial mass activity, much superior to the 63.7% retained for commercial Pt/C.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Abdulwahab Salah,Nabilah Al-Ansi,Salah Adlat,Mbage Bawa,Yuanchun He,Xiangjie Bo,Liping Guo
A facile, low cost and effective method was used to synthesize porous holey nitrogen-doped graphene (PHNG) with three-dimensional (3D) structure via direct pyrolysis of a mixture of urea and magnesium acetate tetrahydrate, followed by treating with hydrochloric acid to remove magnesium cations. The unique structure of PHNG significantly decreases the irreversible stacking of graphene nanosheet , favors the exposure of active edge sites, and enables more accessibility for reactants/electrolytes. The PHNG shows porous structure with a large surface area and can serve as support for nanoparticles . PtPd nanoparticles with different ratios were deposited on PHNG surface to synthesize PtPd/PHNG. The PtPd/PHNG-2 shows high direct oxidation activity towards the glucose, achieving a high sensitivity (52.526 μA mM −1 cm −2 ), wide linear range (100–4000 μM), fast response time (<3 s), low limit of detection (1.82 μM), as well as high selectivity.
研究领域:
材料科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2015
·
IF 6.217
Huayu Qian,Shouwen Chen,Yongsheng Fu,Xin Wang
A composite catalyst consisting of Pt–Pd bimetallic nanoparticles (NPs) and graphitic carbon nitride (g-C 3 N 4 ) modified carbon black (CB) is designed and fabricated by a facile two-step approach. The resulting catalyst exhibits unprecedented high catalytic activity and excellent long-term stability for electrooxidation of alcohols (methanol, ethanol, ethylene glycol and glycerol) in alkaline media . The superior electrochemical performance of the composite catalyst is attributed to the specific characteristics of the unique nanostructure and the synergistic effects of individual components, including the complementary roles of Pt (dehydrogenation site) and Pd (removal of CO-like species), the template effect of the planar amino group of g-C 3 N 4 for the dispersed decoration of Pt–Pd NPs, the high specific surface area of CB for the rapid diffusion of electrolyte and removal of the carbonaceous intermediates, as well as the structural stability of the support based on covalent interaction between g-C 3 N 4 and CB for maintaining the durability of the catalytic system .
研究领域:
材料科学
·
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）