Substitutional Platinum‐Phosphorus Solid Solution by Phosphidation of Worm‐Like Pt Nanoparticles Using Tri‐n‐octylphosphine

• Published in: Small (Weinheim an der Bergstrasse, Germany) Germany), 2024-12
• Main Authors: Liu, Hui, Yang, Niuwa, Ma, Mengyuan, Chen, Dong, Tian, Shaonan, Xu, Lin, Huang, Wenlai, Yang, Jun
• Format: Article
• Language: English
• ISSN: 1613-6810; 1613-6829
• DOI: 10.1002/smll.202409927

Herein, the investigations into the phosphidation of platinum (Pt) nanoparticles are reported using tri‐n‐octylphosphine (TOP) at elevated temperature in an organic solvent, and identify a unique phenomenon not addressed before: The phosphorus (P) atoms can replace partial Pt atoms from their lattice points to form a substitutional Pt‐P solid solution. The rationality is authenticated for forming substitutional Pt–P solid solution via P doping by various characterizations and density functional theory (DFT) calculations, both of which suggests that the maximum P content in the Pt–P solid solution is approximately ≈10% for maintaining the stability of the face‐centered cubic crystal structure.