SUPPLEMENTARY INFORMATION
Electrocatalytic activity of Cu2O Nanocubes based Electrode for glucose oxidation
Sathiyanathan
Felixa,
Pratap
Kollub,
Bala
P.C.Raghupathya,c,*,
Soon
Kwan
Jeongd,*
and Andrews Nirmala Grace a,d,*
a
Centre for Nanotechnology Research, VIT University, Vellore - 632014, Tamil Nadu, India.
b
DST-INSPIRE Faculty, Department of Metallurgical Engineering and Materials Science, Indian Institute of
Technology Bombay, Mumbai, India.
c
Research & Advanced Engineering Division (Materials), Renault Nissan Technology & Business Center India
(P) Ltd., Chennai, Tamil Nadu, India.
d
Climate Change Technology Research Division, Korea Institute of Energy Research, Yuseong-gu, Daejeon 305-
343, South Korea.
*
Corresponding Authors E-mail: [email protected]; [email protected]; [email protected]
Postal Address. Centre for Nanotechnology Research, VIT University, Vellore 632014, Tamil Nadu, India. Tel.: +91
416 2202412; Fax: +91 416 2243092.
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Figure S1. (a) DRS-UV spectrum of cuprous oxide nanocubes and (b) the corresponding plots between (αhν)2 vs.
photon energy (hυ).
Figure S2. Overview XPS spectrum of as-synthesized nanocubes by simple wet chemical route.
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Figure S3. Deconvoluted XPS spectrum of (a) Cu 2p and (b) O1s of Cu2O nanocubes.
Figure S4. Chronoamperometric response of Cu2O/Nafion/GC electrode with successive addition of
analytes to 80 μl of urine sample in 0.1 M NaOH solution.
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Table S1. Comparison of various modified electrodes for the determination of glucose.
Electrode
SE/pH
GSA/cm2
LR [a]
S [b]
DL [c]
R [d]
Cu2O/GCE/Nafion
0.10 M NaOH/13
0.071
2-350
10.9
1.3
[46]
Cu2O/Cu electrode
0.1 M NaOH/13
-------
50-6750
62.29
0.037
[47]
Cu2O/Nfs/GC
0.10 M NaOH/13
0.071
0.05-1.1
0.19
47.2
[48]
0.10 M NaOH/13
0.071
0-500
38
This work
electrode
Cu2O/Nafion/ GC
121.7
electrode
[SE] Supporting Electrolyte; [GSA] Geometric Surface Area (cm2) [LR] Linear Range (μM); [S] Sensitivity
(μAmM-1); [DL] Detection Limit (mM); [R] Reference.
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Electrocatalytic activity of Cu2O Nanocubes based Electrode for
glucose oxidation
Sathiyanathan
Felixa,
Pratap
Kollub,
Bala
P.C.Raghupathya,c,*,
Soon
Kwan
Jeongd,*
and Andrews Nirmala Grace a,d,*
Ref.: Ms. No. JCSC-D-13-00529
Graphical Abstract
Synopsis
The direct electrocatalytic oxidation of glucose at GCE modified with Cu2O nanocubes is studied. The fabricated
electrode showed a good activity, an excellent linear range (0-500 µM), high sensitivity of 121.7 µA/mM, response
time less than 5 s and a detection limit of 38 µM (signal/noise=3).
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