Efficient Solar-Driven Water Splitting Enabled by CoMoWS Catalysts on Silicon Photocathodes.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 41021903.
- Also identified by DOI 10.1021/acs.nanolett.5c03928.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
The construction of multicomponent amorphous metal sulfide systems has emerged as a promising strategy for enhancing the catalytic performance toward the HER. In this study, an amorphous CoMoWS catalyst was synthesized via a rapid and scalable ultrasonic spray pyrolysis method. The resulting CoMoWS-Si photoelectrode exhibits a high photocurrent density of 30.1 mA cm<sup>-2</sup>, a ABPE of 7.26%, and outstanding operational stability exceeding 500 h. XPS confirms strong Co/Mo/W electronic coupling that enhances electronic structure and surface chemical environment. EIS and time-resolved carrier dynamics measurements confirm significantly accelerated interfacial charge transfer and extended carrier lifetimes, thereby suppressing recombination losses and promoting overall reaction kinetics. Integrated with a commercial silicon solar cell in tandem, the device demonstrates 5.17% solar-to-hydrogen efficiency for unbiased water splitting, operating stably over 100 h with no performance decay. These results underscore the potential of amorphous multimetallic sulfide systems as efficient and durable photoelectrocatalysts for scalable solar hydrogen production.