Facile growth of Ag@Pt bimetallic nanorods on electrochemically reduced graphene oxide for an enhanced electrooxidation of hydrazine

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• 作者：S E JEENA ; T SELVARAJU
• 关键词：Electrochemically reduced graphene oxide nanosheets ; bimetallic Ag@Pt nanorods ; seed mediated growth method ; galvanic displacement and hydrazine
• 刊名：Journal of Chemical Sciences
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：128
• 期：3
• 页码：357-363
• 全文大小：1,247 KB
• 参考文献：1.Golabi S M and Zare H R 1999 J. Electroanal. Chem. 465 168CrossRef
  2.Garrod S, Bollard M E, Nicholls A W, Connor S C, Connelly J, Nicholson J K and Holmes E 2005 Chem. Res. Toxicol. 18 115CrossRef
  3.Ahmad U, Rahman M M and Hahn Y B 2009 Talanta 77 1376CrossRef
  4.Umar A, Rahman M M, Kim S H and Hahn Y B 2008 Chem. Commun. 2 166CrossRef
  5.Amlathe S and Gupta V K 1988 Analyst 113 1481CrossRef
  6.Kim S K, Jeong Y N, Ahmed M S, You J M, Choi H C and Jeon S 2011 Sens. Actuators, B 153 246CrossRef
  7.Safavi A, Abbasitabar F and Nezhad M R H 2007 Chem. Anal. 52 835
  8.Mori M, Tanaka K, Xu Q, Ikedo M, Taoda H and Hu W 2004 J. Chromatogr. A 11 1039
  9.Collins G E, Latturner S and Rose-Pehrsson S L 1995 Talanta 42 543CrossRef
  10.Budkuley J S 1992 Microchim. Acta 108 103CrossRef
  11.Li J, Xie H and Chen L 2011 Sens. Actuators, B 153 239CrossRef
  12.Zhang C, Wang G, Ji Y, Liu M, Feng Y, Zhang Z and Fang B 2010 Sens. Actuators, B 150 247CrossRef
  13.Wang Y, Yang X, Bai J, Jiang X and Fan G 2013 Biosens. Bioelectron. 43 180CrossRef
  14.Li J and Lin X 2007 Sens. Actuators, B 126 527CrossRef
  15.Pumera M 2010 Chem. Soc. Rev. 39 4146CrossRef
  16.Wang X 2005 Electroanalysis 17 7CrossRef
  17.Chakraborty S and Retna Raj C 2010 Sens. Actuators, B 147 222CrossRef
  18.Xu F, Zhao L, Zhao F, Deng L, Hu L and Zeng B. 2014 Int. J. Electrochem. Sci. 9 2832
  19.Yang G W, Gao G Y, Wang C, Xu C L and Li H L 2008 Carbon 46 747CrossRef
  20.Kamat P V 2010 J. Phys. Chem. Lett. 1 520CrossRef
  21.Wang C, Zhang L, Guo Z, Xu J, Wang H, Zhai K and Zhuo X 2010 Microchim. Acta 169 1CrossRef
  22.Lee M S, Lee K, Kim S Y, Lee H, Park J, Choi K H, Kim H K, Kim D G, Lee D Y, Nam X Y and Park J U 2013 Nano Lett. 13 2814CrossRef
  23.Luo Z, Yuwen L, Bao B, Tian J, Zhu X, Weng L and Wang L 2012 J. Mater. Chem. 22 7791CrossRef
  24.Jeena S E, Gnanaprakasam P, Dakshinamurthy A and Selvaraju T 2015 RSC Adv. 5 48236CrossRef
  25.Gnanaprakasam P and Selvaraju T 2014 RSC Adv. 4 24518CrossRef
  26.Cheemalapati S, Palanisamy S and Chen S M 2013 Int. J. Electrochem. Sci. 8 3953
  27.Easow J S and Selvaraju T 2013 Electrochim. Acta 112 648CrossRef
  28.Fragkou V, Ge Y, Steiner G, Freeman D, Bartetzko N and Turner A P F 2012 Int. J. Electrochem. Sci. 7 6214
  29.Hubbard A T 1969 J. Electroanal. Chem. 22 165CrossRef
  
• 作者单位：S E JEENA (1)
  T SELVARAJU (1)
  
  1. Department of Chemistry, Karunya University, Coimbatore, 641 114, India
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Chemistry
  
• 出版者：Springer India
• ISSN：0973-7103

文摘

An efficient transducer was constructed by the direct growth of bimetallic Ag@Pt nanorods (NRDs) on L−tryptophan functionalized electrochemically reduced graphene oxide (L−ERGO) modified electrode using galvanic displacement method for the electrooxidation of hydrazine. Initially, one dimensional bimetallic Ag@Cu core−shell NRDs were grown on L−ERGO modified electrode by simple seed mediated growth method. Then, the Cu shells at bimetallic NRDs were exchanged by Pt through galvanic displacement method. Accordingly, the synergetic effect produced by the combination of Ag and Pt as NRDs at L−ERGO surface enabled an enhancement in the electrocatalytic efficiency for hydrazine oxidation. L−ERGO supported bimetallic Ag@Pt NRDs were characterised by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and cyclic voltammetric techniques. Finally, the modified electrode was successfully used for the electrooxidation of hydrazine in PB (pH 7.4) with a detection limit of 6 × 10−7 M (S/N =3). Importantly, the presence of Pt on Ag surface plays a vital role in the electrooxidation of N₂H₄ at −0.2 V with an onset potential at −0.5 V where its overpotential has decreased. On the other hand, L−ERGO nanosheets tend to facilitate an effective immobilization of low density Ag seeds (Ag_seeds) on its surface. Chronoamperometric studies were used to study the linear correlation of [N₂H₄] between 1 mM and 10 mM. The modified electrode shows a high sensitivity and selectivity for a trace amount of N₂H₄ in the presence of different interfering cations and anions.