Efficient Photochemical Vapor Generation from Low Concentration Formic Acid Media.

ABSTRACT: Herein, we report on surprisingly efficient photochemical vapor generation (PVG) of Ru, Re, and especially Ir, achieved from very dilute HCOOH media employing a thin-film flow-through photoreactor operated in flow injection mode. In the absence of added metal ion sensitizers, efficiencies near 20% for Ir and approximately 0.06% for Ru and Re occur in a narrow range of HCOOH concentrations (around 0.01 M), significantly higher than previously reported from conventionally optimized HCOOH concentrations (1-20 M). A substantial enhancement in efficiency, to around 9 and 1.5%, could be realized for Ru and Re, respectively, when 0.005 M HCOONa served as the PVG medium. The addition of metal ion sensitizers (particularly Cd²⁺ and Co²⁺) to 0.01 M HCOOH significantly enhanced

SUBMITTER: Jenikova E 

PROVIDER: S-EPMC10809224 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature