.png){kind=icon}
.png){kind=icon}
Return
Reactive Deposition of Pt Single-Atoms on g-C3N4: Effect of Pt-Precursors
.png){kind=icon}
OA
AI
DOI：10.1039/D5NR03212A.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Anchoring Pt single atoms (SAs) as co-catalysts on g-C3N4 has emerged as a promising approach to enhance the hydrogen production performance of this photocatalytic system. Particularly; by so-called reactive deposition; a maximum HER performance can be achieved using a minimum amount of Pt loading. In this study; we explore the effects of different platinum (Pt) precursors on the reactive deposition of single atoms (SAs) onto g-C3N4; aiming to optimize the performance in photocatalytic hydrogen production. By examining a variety of Pt precursor types; we highlight critical parameters influencing deposition; including precursor charge; solution pH; ionic strength; and ligand properties. Our results reveal that precursors bearing anionic charges are distinctly more effective than cationic precursors for depositing highly active Pt single atoms. Crucially; we find that the surface deposition reaction strongly depends on the ligand involved; with chloride-based complexes enabling more efficient Pt attachment compared to bromide-based complexes. Notably; variations in the oxidation state of platinum (Pt4+ versus Pt2+) did not significantly influence deposition outcomes. Among all precursors studied; (NH4)2PtCl6 achieved the highest catalytic activity; with optimal Pt loading (~0.026 wt.%) and superior hydrogen evolution rates surpassing the widely utilized H2PtCl6 precursor. Furthermore; adjustments to solution conditions; such as significant pH changes due to increased ionic strength; were found to negatively impact deposition and catalytic effectiveness. These insights underscore the importance of precursor selection and solution chemistry control; providing a robust basis for the development of efficient and cost-effective single-atom photocatalysts formed by adsorption-reaction treatments.