ELECTROCHIMICA ACTA
·
2014
·
IF 4.086
Jie-Ning Zheng,Ming Zhang,Fang-Fang Li,Shan-Shan Li,Ai-Jun Wang,Jiu-Ju Feng
In this report, a simple and rapid method was developed for the large-scaled synthesis of well-defined Pd nanochains based on one-pot wet-chemical reduction of PdCl 2 with KBH 4 , with the assistance of octylphenoxypolyethoxyethanol (OP-10) as a growth directing agent. The concentration of OP-10, the strength of a reducing agent and its amount, and the reaction temperature were demonstrated essential for preparation of the Pd nanocrystals. Furthermore, the as-prepared Pd nanochains exhibited a higher electrochemically active surface area and the enhanced electrocatalytic performance for formic acid oxidation in acid media, compared with the Pd nanoparticles.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 28
·15678-15683
·
IF 12.732
Shuli Yin,Songliang Liu,Shiqian Jiao,Hugang Zhang,You Xu,Ziqiang Wang,Xiaonian Li,Liang Wang,Hongjing Wang
Benefiting from the interaction of inorganic and organic building blocks, the design of metal–organic nanohybrids is of great significance for the oxygen reduction reaction (ORR). Herein, a universal strategy is presented to controllably synthesize tannic acid (TA) functionalized AuPd lavender-like nanochains (AuPd@TA LCs) by a chemical reduction method at low temperature. Due to the unique structural characteristics and polyphenolic modification, the AuPd@TA LCs show superior ORR performance in an alkaline electrolyte. Moreover, the surface decorated TA polymers can act as a molecular screen window to prevent methanol molecules from accessing the active site of the catalyst, thus resulting in high methanol tolerance and catalytic stability. The presented molecular screen window strategy is highly valuable for designing ORR electrocatalysts with high methanol tolerance.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Min Yang,Mingyuan Pang,Jianyu Chen,Fahui Gao,Hongliang Li,Peizhi Guo
The synthesis of metal nanometer electrocatalysts with a two-dimensional (2D) structure or rich active sites has become a research hotspot in electrocatalysis. In this work, surfactant hexadecyltrimethylammonium bromide (CTAB) was used to assist the synthesis and assembly of Pd ultrathin nanosheet with the help of Mo(CO)6 in the start system. Pd nanochain composed of nanoparticles is obtained under the same condition, replacing CTAB with carrageenan only. Electrochemical measurements showed that the catalytic peak current density for the electrooxidation of ethanol can reach 2145 mA mg–1 for the Pd nanosheet assembly (NSA) and 1696 mA mg–1 for Pd nanochains. Pd nanosheet assembly also has a lower electron-transfer barrier, better catalytic stability, and antipoisoning performance than that of Pd nanochains. The mechanism of Pd nanosheets and nanochains catalysts the enhanced electrocatalytic activity toward ethanol oxidation has been discussed based on the experimental data.
研究领域:
材料科学
·
电化学
·
催化科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Ruigang Xie,Lingli Zhou,Daixiang Chen,Shenghu Yan,Nianbing Su,Yue Zhang
Palladium (Pd)-based catalysts have been extensively investigated in direct ethanol fuel cells (DEFCs) since the urgent energy and environmental problems. Rational design Pd-based catalyst with outstanding structure can optimize its electrocatalytic performance for ethanol oxidation reaction (EOR) catalyst. In this work, a facile strategy was proposed to prepare AuPd nanochain networks (NNWs) with core-shell structure by adjusting the reduction rate by slowly dropping the acidic reducing agent to the alkaline precursor solution system. The resulting catalysts exhibit a porous self-supporting structure with twisted features, exposing a large number of active sites. The optimized AuPd NNWs catalyst displays much-improved activity (3289.62 mA mg − 1 Pd) and greatly enhanced electrocatalytic stability for EOR in comparison with that of commercial Pd/C catalysts. This enhanced activity can be attributed to the synergic effect of the Pd shell with the Au core as well as the twisted and self-supporting structure which can expose much more active sites and provide rich mass and electron transfer channels.
研究领域:
材料科学
·
能源与环境科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROANALYSIS
·
2015
·Vol. 28
·期 2
·304-311
·
IF 2.138
Bingxin Wang,Cui Ye,Xia Zhong,Yaqin Chai,Shihong Chen,Ruo Yuan
A new electrochemical biosensor was developed for organophosphorus pesticides (OPs) and huperzine-A (hupA) detection based on Pd wormlike nanochains/graphitic carbon nitride (Pd WLNCs/g-C 3 N 4 ) nanocomposites and acetylcholinesterase (AChE). The morphologies and components of the nanocomposites were analyzed by transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The Pd WLNCs/g-C 3 N 4 nanocomposites could effectively immobilize enzymes and promote the signal amplification. Under the optimum condition, the proposed biosensor displayed well performance. The linear response ranges for the determination of OPs and hupA were 1.00 nM to 14.96 µM and 3.89 nM to 20.80 µM, respectively. The corresponding detection limits were 0.33 nM and 1.30 nM (S/N=3). Meanwhile, the biosensor owned good reproducibility and stability, and could also be applied to analyze practical samples, which would be a new hopeful method for pesticide analysis.
研究领域:
分析化学
·
环境科学
·
生物传感技术
✓ 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）