Effect of Mn doping on electrochemically synthesized Mn-La 2 O 3 thin films non-enzymatic glucose sensor

In this report, a porous nanoflakes-like structure of Mn-doped lanthanum oxide (Mn-La 2 O 3 ) was fabricated using the multipotential electrodeposition method on a stainless steel substrate. Mn-La 2 O 3 electrode catalyst employed for the non-enzymatic electrochemical glucose detection from human blood samples. The structural, morphological, and elemental studies were performed by X-ray diffraction, Field emission-scanning electron microscopy, and X-ray photoelectron microscopy, respectively. The porous structure of 1% Mn-La 2 O 3 electrode catalyst exhibits excellent sensitivity of 1985 µA mM −1 cm −2 and a wide linear response range from 50 to 950 µM at the applied working potential (+ 0.41 V/SCE). Furthermore, the catalytic electrode showed an excellent current response towards glucose molecules in the presence of other carbohydrates and oxidizable interferents, which are also generally found in physiological blood samples. The utilization of the 1% Mn-La 2 O 3 electrode catalyst for glucose detection in human blood samples, implies the promising potential for glucose monitoring. Experimental results demonstrate that the fabricated electrode catalyst provides new horizons as facile and sensitive glucose detection electrodes.