Akhilesh Ganganboina1
National Institute of Materials Sciences1
Akhilesh Ganganboina1
National Institute of Materials Sciences1
Efficient photoelectrochemical (PEC) detection requires a deep understanding of the processes involved in generating, separating, and reacting photoinduced carriers at interfaces. However, slow interfacial reactions and the need for appropriate photoactive layers pose significant challenges to constructing advanced PEC platforms. In this study, platinum single-atom catalysts (Pt SACs) were integrated onto CuO<sub>2</sub> and two dimensional Mxene as a proof of concept, amplifying PEC signals by boosting oxygen reduction reactions. As a newly emerging class of 2D materials, Ti<sub>3</sub>C<sub>2</sub>T<i><sub>x</sub></i> MXene was used as fantastic support to uniformly anchor Cu<sub>2</sub>O nanoparticles due to its electronegative surface. Pt SACs were also shown to exhibit efficient peroxidase-like activity, depressing PEC signals through Pt SACs-mediated enzymatic precipitation reactions. By utilizing the oxygen reduction and peroxidase-like activity of Pt SACs, a robust PEC sensing platform was successfully constructed for the sensitive detection of SARS-CoV-2. This research provides valuable insights into the use of SACs for sensitive PEC analysis.