Nanoporous silver using pulsed laser deposition for high-performance oxygen reduction reaction and hydrogen peroxide sensing

摘要

Silver (Ag)-based materials have shown great application potential in the oxygen reduction reaction (ORR) and hydrogen peroxide (H2O2) detection. The porous structures of Ag have attracted a lot of research interest due to their large specific surface area and high electrochemical activity. In this work, nanoporous Ag structures composed of nano-sized particles were prepared by a one-step pulsed laser deposition (PLD) under controlled background gas pressure. The porous PLD-Ag showed a high ORR performance (E-onset: 1.007 Vvs. RHE,E-1/2: 0.863 Vvs. RHE), high sensitivity (613.1 mu A cm(-2)mM(-1)at -0.2 Vvs. SCE) and selectivity for H(2)O(2)detection. The PLD technique provided a new, yet universal approach to producing high-performance, metal-based electrochemical electrodes.