Facile Synthesis of Highly Active Three-Dimensional Urchin -like Pd@PtNi Nanostructures for Improved Methanol and Ethanol Electrochemical Oxidation

被引：46

作者：

Ren, Guohong ^{[1
]}

Liu, Yajun ^{[1
]}

Wang, Weigang ^{[1
]}

Wang, Mingqian ^{[1
]}

Zhang, Zhicheng ^{[1
]}

Liang, Ying ^{[1
]}

Wu, Shishan ^{[1
]}

Shen, Jian ^{[1
,2
]}

机构：

[1] Nanjing Univ, Sch Chem & Chem Engn, Minist Educ, Key Lab High Performance Polymer Mat & Technol, 163 Xianlin Ave, Nanjing 210023, Jiangsu, Peoples R China

[2] Nanjing Normal Univ, Coll Chem & Mat Sci, Jiangsu Key Lab Biomed Mat, Jiangsu Collaborat Innovat Ctr Biomed Funct Mat, 1 Wenyuan Rd, Nanjing 210046, Jiangsu, Peoples R China

来源：

ACS APPLIED NANO MATERIALS | 2018年 / 1卷 / 07期

基金：

中国国家自然科学基金;

关键词：

3D urchin-like nanostructures; reaction active sites; electrochemically active surface area; electrochemical oxidation reaction; electrochemical activity and durability; REDUCED GRAPHENE OXIDE; OXYGEN REDUCTION REACTION; HIGH ELECTROCATALYTIC ACTIVITY; ONE-POT SYNTHESIS; ENHANCED ACTIVITY; HIGH-PERFORMANCE; ALLOY NANOWIRES; FUEL-CELL; SHELL; NANOCRYSTALS;

D O I：

10.1021/acsanm.8b00438

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Exploitation of highly active catalysts for alcohol electrooxidation is urgent for direct alcohol fuel cells (DAFCs). In this research, a facile and mild synthetic approach is utilized to control and tailor the morphology of the three-dimensional (3D) urchin-like Pd@PtNi nanostructures (NSs), and the formation mechanism of the as-prepared nanostructures is expounded in detail. The Pd@PtNi NSs exhibit outstanding electrochemical properties and remarkable durability toward both methanol and ethanol oxidation reaction (MOR and EOR) in alkaline solution. The electrochemically active surface area (ECSA) of the Pd@PtNi NSs is 59.5 m(2) g(-1), and their mass activities for MOR and EOR are 1614.3 and 1502.3 mA mg(-1) respectively, which are much higher than those of their ternary or binary alloy counterparts as well as commercial Pt black catalysts. Moreover, it still retains high current densities after catalyzing 10 000 s, while the current densities of other nanocatalysts reduce to nearly zero. The outstanding electrochemical activities and durability are owing to the specific 3D urchin-like nanostructures providing enormous active sites for catalytic reaction and the synergy effects between Pt, Pd, and Ni atoms. The 3D urchin-like Pd@PtNi NSs will enrich the electrocatalysts for DAFCs.

引用

页码：3226 / 3235

页数：19