A Calculated from the Data in Paper

a Calculated from the data in paper.

b In µA mM-1 cm-2.

Table 1S. Comparison of the developed H2O2 sensors.

[31] Wang YL, Chen SH, Ni F, Gao F, Li MG, (2009). Peroxidase-Like Layered Double Hydroxide Nanoflakes for Electrocatalytic Reduction of H2O2. Electroanalysis 21:2125-2132.

[32] Shao MF, Han JB, Shi WY, Wei M, Duan X, (2010). Layer-by-layer assembly of porphyrin/layered double hydroxide ultrathin film and its electrocatalytic behavior for H2O2, Electrochem Commun 12:1077–1080

[33] Kong XG, Zhao JW, Han JB, Zhang DY, Wei M, Duan X, (2011). Fabrication of Naphthol green B/layered double hydroxide nanosheets ultrathin film and its application in electrocatalysis, Electrochim Acta 56:1123–1129

[34] Salimi A, Hallaj R, Soltanian S, Mamkhezri H, (2007). Nanomolar detection of hydrogen peroxide on glassy carbon electrode modified with electrodeposited cobalt oxide nanoparticles, Anal Chim Acta 594:24–31

[35]Lin MS, Jan BI, (1997). Determination of Hydrogen Peroxide by Utilizing a Cobalt(I1)hexacyanoferrate-Modified Glassy Carbon Electrode as a Chemical Sensor. Electroanalysis 9:340-344.

[36] Miah MR, Ohsaka T, (2006). Cathodic Detection of H2O2 Using Iodide-Modified

Gold Electrode in Alkaline Media. Anal Chem 78:1200-1205.

[37]Sun NJ, Guan LH, Shi ZJ, Li NQ, Gu ZN, Zhu ZW, Li MX, Shao YH, (2006). Ferrocene Peapod Modified Electrodes: Preparation, Characterization, and Mediation of H2O2. Anal Chem 78:6050-6057.

[38] Gu TT, Hasebe Y, (2006). DNA–Cu(II) poly(amine) complex membrane as novel catalytic layer for highly sensitive amperometric determination of hydrogen peroxide. Biosens Bioelectron 21:2121-2128.

[39] Cui K, Song YH, Yao Y, Huang ZZ, Wang L, (2008). A novel hydrogen peroxide sensor based on Ag nanoparticles electrodeposited on DNA-networks modified glassy

carbon electrode. Electrochem Commun 10:663-667.

[40] Wei H, Wang E, (2008). Fe3O4 Magnetic Nanoparticles as Peroxidase Mimetics and Their Applications in H2O2 and Glucose Detection. Anal Chem 80:2250-2254.

[41] Dai ZH, Liu SH, Bao JC, Ju HX, (2009). Nanostructured FeS as a Mimic Peroxidase for Biocatalysis and Biosensing. Chem Eur J 15:4321-4326.

[42] Zhang L, Li H, Ni YH, Li J, Liao KM, Zhao GC, (2009). Porous cuprous oxide microcubes for non-enzymatic amperometric hydrogen peroxide and glucose sensing. Electrochem Commun 11:812-815.

[43] Zhang L, Ni YH, Wang XH, Zhao GC, (2010). Direct electrocatalytic oxidation of nitric oxide and reduction of hydrogen peroxide based on α-Fe2O3 nanoparticles-chitosan composite. Talanta 82:196–201.

[44] Wu SG, Wang TL, Wang CQ, Gao ZY, Wang CQ, (2007). Improvement of Selectivity and Stability of Amperometric Detection of Hydrogen Peroxide Using Prussian Blue-PAMAM Supramolecular Complex Membrane as a Catalytic Layer. Electroanalysis 19:659-667.

[45] Miao YQ, Wang H, Shao YY, Tang ZW, Wang J, Lin YH, (2009). Layer-by-layer assembled hybrid film of carbon nanotubes/iron oxide nanocrystals for reagentless electrochemical detection of H2O2. Sens Actuators B 138:182-188.

[46] Lin MS, Len HJ, (2005). A Fe3O4-Based Chemical Sensor for Cathodic Determination of Hydrogen Peroxide. Electroanalysis 17:2068-2073.

[47] Gao LZ, Zhuang J, Nie L, Zhang JB, Zhang Y, Gu N, Wang TH, Feng J, Yang DL, Perrett S, Yan X, (2007). Intrinsic peroxidase-like activity of ferromagnetic nanoparticles. Nat Nanotechnol 2:577-583.

[48] Zhao B, Liu ZR, Liu ZL, Liu GX, Li Z, Wang JX, Dong XT, (2009). Silver microspheres for application as hydrogen peroxide sensor. Electrochem Commun 11:1707-1710.

[49] Gligor D, Maicaneanu A, Walcarius A, (2010). Iron-enriched natural zeolite modified carbon paste electrode for H2O2 detection. Electrochim Acta 55:4050-4056.

[50] Jin E, Lu XF, Cui LL, Chao DM, Wang C, (2010). Fabrication of graphene/prussian blue composite nanosheets and their electrocatalytic reduction of H2O2. Electrochim Acta 55:7230-7234.