•SUPPORTING INFORMATION•

Platinum nanoparticles supported MoS2nanosheet for simultaneous detection of dopamine and uric acid

Jie Chao1, Xiaoyan Han1, Haofan Sun1, Shao Su1*,
Lixing Weng2*Lianhui Wang1

1Key Laboratory for Organic Electronics & Information Displays; Institute of Advanced Materials, National Syngerstic Innovation Center for Advanced Materials, Nanjing University of Posts & Telecommunications, Nanjing 210023, China

2College of Geography and Biological Information, Nanjing University of Posts and Telecommunications,
Nanjing 210023, China

Received June 23, 2015; accepted July 27, 2015

FigureS1 (A)Cyclic voltammograms of thePtNPs@MoS2/GCE in 0.1M pH 7.0PB containing 300μM DAat10,20, 50, 100, 200, and 300 mV s-1 (from inner to outer). (B) Relationship between scan rate and peak currents of DA.(C) Cyclic voltammograms of thePtNPs@MoS2/GCE in 0.1M pH 7.0PB containing 1 mM UA at 10,20, 50, 100, 200, and 300 mV s-1 (from inner to outer).(D)Relationship between scan rate and peak currents of UA.

FigureS2 (A) Differential pulse voltammetric curves of the PtNPs@MoS2/GCE in 0.1MPBS in pHvalues(a) 7.5, (b)7.0, (c) 6.5, (d) 6.0 and(e) 5.5 containing50μMand 1 mMUA.(B) Plot of E0 vs.pHvalues.

Figure S3 Differential pulse voltammetric curves ofindividual determination of(A)different DAconcentrations and (C) different UA concentrations at PtNPs@MoS2/GCE. Plot of oxidation peakcurrentvs.(B)DAand (D) UA concentrations.

TableS1 Comparison of the response characteristics of different modified electrodes for simultaneous detection of DA and UA.

Electrode materials / Detectionlimit(μM) / Liner range(μM) / Ref.
DA / UA / DA / UA
Pt–Au hybrid / 24 / 21 / 24–384 / 21–336 / [1]
Poly(Evansblue)/GCE / 0.25 / 2 / 1.0–10 / 30–110 / [2]
CNT/PEDOT/GCEa / 10 / 10 / 10–330 / 10–250 / [3]
ZnO/RMb / 0.7 / 4.5 / 6–960 / 50–800 / [4]
PGEc / 0.11 / 1.4 / 1-20 / 2.5-30 / [5]
OMC/Nafiond / 0.5 / 4.0 / 1–90 / 5–80 / [6]
Chitosan-graphene / 1 / 2 / 1–24 / 2–45 / [7]
PEDOT/GCEe / 1.2 / 1.4 / 20-80 / 20-130 / [8]
PtNPs@MoS2/GCE / 0.17 / 0.98 / 0.5-150 / 5-1000 / This work

acarbon nanotube-poly(3,4-ethylenedioxythiophene) film.

b Zinc oxide-electrogenerated redox mediator hybrid film.

cPyrolytic graphite activated electrodes.

d Ordered mesoporous carbon/Nafion composite film.

epoly(3,4-ethylenedioxythiophene) film

References:

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