期刊
ELECTROCHIMICA ACTA
卷 130, 期 -, 页码 1-8出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.02.123
关键词
Nanowires; Nanotubes; Pt-Pd; Nonenzymatic glucose sensor; Catalytic activity
资金
- National Natural Science Foundation of China (NSFC) [21305044]
- Science and Technology Commission of Shanghai Municipality (STCSM) [13510710900]
Facilitating the glucose electro-oxidation reaction is always of great scientific sense due to its wide applications in sensing, catalysis and biofuel cells. On the road to improving the electrocatalysis of glucose, one-dimensional materials mainly including nanowires and nanotubes are commonly proposed because of their fascinating characters, and both of them are reported capable of offering better catalytic performance compared to commercial Pt/C and Pt black catalysts. However, so far it still confuses us that which structure can provide more favorable properties towards the direct electro-oxidation of glucose. Here we carry out a systematically comparative study of nonenzymatic electrochemical sensors based on vertical nanowire and nanotube arrays for glucose detection. By using bimetallic Pt-Pd as a general model, we demonstrate that nanotube arrays, owing to their larger catalytic area and higher catalyst utilization, show higher activity for glucose electro-oxidation and enzyme-free analysis than nanowire arrays. These findings may be helpful for the future design of more efficient catalyst structures for glucose oxidation and other reactions. (C) 2014 Elsevier Ltd. All rights reserved.
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