Details

Autor(en) / Beteiligte

• Chen, Fengjuan
• Yao, Yonggang
• Nie, Anmin
• Xu, Shaomao
• Dai, Jiaqi
• Hitz, Emily
• Li, Yiju
• Lu, Aijiang
• Huang, Zhennan
• Li, Tangyuan
• Shahbazian‐Yassar, Reza
• Hu, Liangbing

Titel

High‐Temperature Atomic Mixing toward Well‐Dispersed Bimetallic Electrocatalysts

Ist Teil von

• Advanced energy materials, 2018-09, Vol.8 (25), p.n/a

Ort / Verlag

Weinheim: Wiley Subscription Services, Inc

Erscheinungsjahr

2018

Link zum Volltext

Quelle

Wiley Online Library Journals Frontfile Complete

Beschreibungen/Notizen

• Supported bimetallic alloy nanoparticles are of great interest in various catalytic applications due to the synergistic effects between different metals for improved catalytic performance. However, it still remains a challenge to efficiently synthesize atomically mixed alloy nanoparticles with uniform dispersion onto a desired substrate. Here, in situ, rapid synthesis of atomically mixed bimetallic nanoparticles well‐dispersed on a conductive carbon network via a 1 s high‐temperature pulse (HTP, ≈1550 K, duration 1 s, the rate of 104 K s−1) is reported. The high temperature facilitates the total (atomic) mixing of different metals, while the rapid quenching ensures the uniform dispersion of nanoparticles with fine features such as twin boundaries and stacking faults, which are potentially beneficial to their catalytic performance. By varying the ratio of the precursor salts and parameters in the HTP process, the composition, size, and morphology of the resultant nanoparticles can easily be tuned. Moreover, the synthesized bimetallic (PdNi) nanoparticles demonstrate excellent electrocatalytic performance for the hydrogen evolution reaction and hydrogen peroxide electrooxidation. This work provides a general strategy for a facile and rapid synthesis of bimetallic nanoparticles directly from their salts for a range of emerging applications. An in situ, rapid synthesis of atomically mixed bimetallic nanoparticles well‐dispersed on carbon supports via a 1 s high‐temperature pulse (≈1550 K) is reported. The high temperature facilitates the total mixing of two metals while the short duration and rapid quenching ensure the small size and uniform dispersion as superior nanocatalysts.