SnO₂ nanorod: An efficient non-noble-metal electrocatalyst for non-enzymatic H₂O₂ sensing

Developing non-noble-metal electrocatalyst for non-enzymatic H 2 O 2 sensing is highly attractive. In this work, we describe the development of SnO 2 nanorod grown on carbon cloth (SnO 2 /CC) as an efficient electrocatalyst for H 2 O 2 reduction in neutral solution. The SnO 2 /CC electrode reveals superior electrochemical performance as a non-enzymatic electrochemical H 2 O 2 sensor, with an ultra-high sensitivity of 24 840 μ A mM −1 cm -2 , a low detection limit of 9.94 nM at S/N = 3, a linear range from 0.10 μ M to 1.0 mM, and satisfactory reproducibility and stability at −0.40 V.