Details

Autor(en) / Beteiligte

• Shi, Wenhui
• Li, Zezhou
• Gong, Zhihao
• Liang, Zihui
• Liu, Hanwen
• Han, Ye-Chuang
• Niu, Huiting
• Song, Bo
• Chi, Xiaodong
• Zhou, Jihan
• Wang, Hua
• Xia, Bao Yu
• Yao, Yonggang
• Tian, Zhong-Qun

Titel

Transient and general synthesis of high-density and ultrasmall nanoparticles on two-dimensional porous carbon via coordinated carbothermal shock

Ist Teil von

• Nature communications, 2023-04, Vol.14 (1), p.2294-12, Article 2294

Ort / Verlag

London: Nature Publishing Group UK

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Carbon-supported nanoparticles are indispensable to enabling new energy technologies such as metal-air batteries and catalytic water splitting. However, achieving ultrasmall and high-density nanoparticles (optimal catalysts) faces fundamental challenges of their strong tendency toward coarsening and agglomeration. Herein, we report a general and efficient synthesis of high-density and ultrasmall nanoparticles uniformly dispersed on two-dimensional porous carbon. This is achieved through direct carbothermal shock pyrolysis of metal-ligand precursors in just ~100 ms, the fastest among reported syntheses. Our results show that the in situ metal-ligand coordination (e.g., N → Co 2+ ) and local ordering during millisecond-scale pyrolysis play a crucial role in kinetically dominated fabrication and stabilization of high-density nanoparticles on two-dimensional porous carbon films. The as-obtained samples exhibit excellent activity and stability as bifunctional catalysts in oxygen redox reactions. Considering the huge flexibility in coordinated precursors design, diversified single and multielement nanoparticles (M = Fe, Co, Ni, Cu, Cr, Mn, Ag, etc) were generally fabricated, even in systems well beyond traditional crystalline coordination chemistry. Our method allows for the transient and general synthesis of well-dispersed nanoparticles with great simplicity and versatility for various application schemes. Well-dispersed nanoparticles are critical for catalysis but face challenges of easy agglomeration. Here the authors report synthesis of ultrasmall nanoparticles anchored on two-dimensional porous carbon via coordinated carbothermal shock and the application of resulted nanoparticles as catalysts for oxygen electrocatalysis.