Photocatalytic H2O Overall Splitting into H2 Bubbles by Single Atomic Sulfur Vacancy CdS with Spin Polarization Electric Field

Autor:	Shaoqing Song, Shujuan Jiang, Chuanzhi Sun, Jiari He, Lijun Hu, Chengtian Shao
Rok vydání:	2021
Předmět:	Materials science Spin polarization Field (physics) General Engineering General Physics and Astronomy Condensed Matter::Materials Science Chemical physics Electric field Vacancy defect Atom Photocatalysis General Materials Science Charge carrier Spin (physics)
Zdroj:	ACS Nano. 15:18006-18013
ISSN:	1936-086X 1936-0851
DOI:	10.1021/acsnano.1c06524
Popis:	Low efficient transfer of photogenerated charge carriers to redox sites along with high surface reaction barrier is a bottleneck problem of photocatalytic H2O overall splitting. Here, in the absence of cocatalysts, H2O overall splitting has been achieved by single-atomic S vacancy hexagonal CdS with a spin polarization electric field (PEF). Theoretical and experimental results confirm that single-atomic S vacancy-induced spin PEF with opposite direction to the Coulomb field accelerates charge carrier transport dynamics from the bulk phase to surface-redox sites. By systematically tuning the spin PEF intensity with single-atomic S vacancy content, common pristine CdS is converted to a photocatalyst that can efficiently complete H2O overall splitting by releasing a great number of H2 bubbles under natural solar light. This work solves the bottleneck of solar energy conversion in essence by single atom vacancy engineering, which will promote significant photocatalytic performance enhancement for commercialization.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5b359961c08a69918a395a93f7362c50 https://doi.org/10.1021/acsnano.1c06524 Zobrazit plný text záznamu