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
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
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
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Jing-Jing Lv,Nattawadee Wisitruangsakul,Jiu-Ju Feng,Jun Luo,Ke-Ming Fang,Ai-Jun Wang
In this work, we have prepared porous PtPd alloyed nanoflowers uniformly supported on reduced graphene oxide by a simple and facile wet-chemical method, with the assistance of cytosine as a structure-directing agent. The products were mainly characterized by transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. The as-prepared nanocomposites displayed improved electrocatalytic performances toward ethanol oxidation in alkaline media and oxygen reduction in acidic media, which make it a promising electrocatalyst in fuel cells.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2014
·
IF 3.84
Weiyan Liu,Hongmei Yang,Shenguang Ge,Lei Shen,Jinghua Yu,Mei Yan,Jiadong Huang
In this paper, PtPd alloy decorated reduced graphene oxide (RGO/PtPd) was synthesized by a simple and green method. The RGO/PtPd could catalytic oxidation of H 2 O 2 to form O 2 and O 2 acted as the coreactant of peroxydisulfate, could greatly amplify the ECL signal. Moreover, the RGO/PtPd exhibited higher catalytic activity compared to the RGO/Pt or RGO/Pd catalyst because of the synergetic effects of Pt and Pd and the enhanced electron transfer of RGO. Based on this, a highly sensitive and selective label-free electrochemiluminescence (ECL) aptasensor for detection of adenosine triphosphate was designed. In this process, RGO/PtPd could be regarded as mimicking enzyme, the effect of which was similar to horseradish peroxidase in generating O 2 and also used as carriers to immobilize ssDNA2. With respect to sensitivity, Ag dendrites with hierarchical nanostructures were electrodeposited on working electrode of portable indium tin oxide device, which improved the electronic transfer rate as well as increased the amount of immobilized capture ssDNA1. Under the optimal conditions, the approach provided a linear range from 0.1 pM to 50 nM and a low detection limit of 0.037 pM.
研究领域:
分析化学
·
生物传感
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2014
·
IF 4.086
Jing-Jing Lv,Jie-Ning Zheng,Li-Li Chen,Meng Lin,Ai-Jun Wang,Jian-Rong Chen,Jiu-Ju Feng
In this work, a one-pot solvothermal method was developed for large-scaled synthesis of well-defined bimetallic alloyed Pt-Pd nanocubes uniformly supported on reduced graphene oxide nanosheets (Pt-Pd nanocubes/RGOs). Herein, poly(vinylpyrrolidone) (PVP) and KI were employed as a capping agent and a structure-directing additive, respectively, and N , N -dimethylformamide (DMF) is used as a solvent and a reducing agent. The as-prepared Pt-Pd nanocubes/RGOs exhibited the enlarged electrochemically active surface area, enhanced electrocatalytic activity, and improved stability for ethanol oxidation reaction (EOR) and oxygen reduction reaction (ORR), compared with commercial Pt-C (10 wt %).
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Qi Xiao,Jiawen Li,Shuai Liu,Mingli Yang,Yi Fang,Shan Huang
Given the pivotal role of hydrogen peroxide (H 2 O 2 ) in numerous biological progresses, there has been a recent surge in the development of highly effective electrochemical sensors for H 2 O 2 detection. In this article, we propose an enzyme-free amperometric system for the sensitive and selective recognition of H 2 O 2 , leveraging ultrafine PtPd alloy/ionic liquid-carbon dots (IL-CDs) nanocomposites modified flexible carbon fiber. The IL-CDs were synthesized through the direct electrodeposition of ionic liquid [BMIM][PF 6 ] using Pt sheets as electrodes. Subsequently, a sequential electrodeposition of IL-CDs, H 2 PtCl 6 , and PdCl 2 onto the activated carbon fiber (ACF) yielded the PtPd/IL-CDs/ACF microelectrode. This microelectrode serves as an enzyme-free amperometric sensor for H 2 O 2 detection, exhibiting an improved response with a significantly lower detection limit of 0.29 μM and a relatively broad linear range spanning from 2 to 6561 μM. Furthermore, this enzyme-free amperometric H 2 O 2 sensor demonstrates remarkable stability over extended periods and exceptional performance in practical applications, such as the analysis of commercially available milk, human serum, human urine, and living cancer cells analysis. This study offers a fresh perspective on amperometric sensors based on metal alloys and CDs electrode, highlighting the potential of enzyme-independent detection for hydrogen peroxide in biological systems.
研究领域:
生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2020
·Vol. 24
·期 1
·195-206
·
IF 2.646
Li Zhenqin,Deng Xiaoting,Zhou Haikun,Xuan Wei,Xie Zhiyong,Liu Feng
There are many types of cathodic oxygen reduction catalysts for proton exchange membrane fuel cell (PEMFC). Among them, Pt-based catalysts are most likely to be industrialized because of their incomparable high activity. However, most of the Pt-based catalysts have not reached the maximum activity and stability. Herein, porous carbon nanofibers (p-CNF) with self-nitrogen-doped as catalyst supports were successfully prepared by the method of electrospinning. After functionalization, the functionalized porous carbon nanofibers (f-p-CNF) were loaded with PtPd alloy nanoparticles to obtain the catalyst (Pt 0.66 Pd 0.33 /f-p-CNF), which has excellent electrochemical performance. Its specific activities (SA) and Pt mass activities (Pt MA) are 1.73 and 1.86 times of the commercial JM 20% Pt/C (JM20), respectively. The results can be attributed to the porous structure of nanofibers, which not only facilitate the transmission of gas-liquid and electron but also increase the exposure of active sites. And the doped nitrogen of fibers may regulate the electronic structure of the metal active substance to increase the activity. This work provides catalyst with novel structure which could enable PEMFCs to be more efficient in operation.
研究领域:
材料科学
·
能源科学
✓ 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）