钯
电催化剂
抗坏血酸
催化作用
透射电子显微镜
扫描电子显微镜
乙醇
卡拉胶
电化学
核化学
材料科学
纳米结构
化学工程
纳米花
化学
纳米颗粒
水溶液
甲醇
作者
Ning Ma,Xuehua Liu,Ziqi Yang,Guojun Tai,Yanru Yin,Shuibo Liu,Hongliang Li,Peizhi Guo,Xiu Song Zhao
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2018-01-02
卷期号:6 (1): 1133-1140
被引量:29
标识
DOI:10.1021/acssuschemeng.7b03425
摘要
Palladium (Pd) nanoflowers with tunable thorns were prepared by a facile and rapid route with the assistance of carrageenan. The superior nature of well-dispersed Pd nanoflowers has been disclosed by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy measurements. The growth of thorns of Pd nanostructures was first stimulated with the continuous introduction of l-ascorbic acid in the synthesis system and then reached a maximum length of about 132 nm, followed by a slight decrease in concentration. Electrochemical data showed that Pd nanoflowers with the longest thorns exhibited the highest catalytic current density of 1160 mA/mg, optimized tolerance to the poisoning, and the lowest onset potential while others showed a better cycle stability with a catalytic activity maintenance of above 96% after 300 cycles. It is suggested that the structure of thin thorns of Pd nanoflowers should be easier to damage than thick thorns during the electrocatalysis of ethanol. The relatio...
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