Platinum-Ruthenium Bimetallic Nanoparticle Catalysts Synthesized Via Direct Joule Heating for Methanol Fuel Cells.

• Tác giả: Yuan Chen, Yeyu Deng, Leo Lai, Hao Li, Jing Li, Mohan Li, Fangzhou Liu, Heng Liu, Fangxin She, Li Wei, Zixun Yu, Di Zhu
• Ngôn ngữ: eng
• Thông tin xuất bản: Germany : Small (Weinheim an der Bergstrasse, Germany) , 2025
• Bộ sưu tập: NCBI
• ID: 250929

Tóm tắt

Platinum-Ruthenium (PtRu) bimetallic nanoparticles are promising catalysts for methanol oxidation reaction (MOR) required by direct methanol fuel cells. However, existing catalyst synthesis methods have difficulty controlling their composition and structures. Here, a direct Joule heating method to yield highly active and stable PtRu catalysts for MOR is shown. The optimized Joule heating condition at 1000 °C over 50 microseconds produces uniform PtRu nanoparticles (6.32 wt.% Pt and 2.97 wt% Ru) with an average size of 2.0 ± 0.5 nanometers supported on carbon black substrates. They have a large electrochemically active surface area (ECSA) of 239 m