Operando optical fiber monitoring of nanoscale and fast temperature changes during photo-electrocatalytic reactions.

ABSTRACT: In situ and continuous monitoring of thermal effects is essential for understanding photo-induced catalytic processes at catalyst's surfaces. However, existing techniques are largely unable to capture the rapidly changing temperatures occurring in sub-μm layers at liquid-solid interfaces exposed to light. To address this, a sensing system based on a gold-coated conventional single-mode optical fiber with a tilted fiber Bragg grating inscribed in the fiber core is proposed and demonstrated. The spectral transmission from these devices is made up of a dense comb of narrowband resonances that can differentiate between localized temperatures rapid changes at the catalyst's surface and those of the environment. By using the gold coating of the fiber as an electrode in an electrochemical reactor

SUBMITTER: Li Z 

PROVIDER: S-EPMC9279429 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature