合金
纳米颗粒
热解
五元
材料科学
过电位
化学工程
纳米技术
冶金
化学
物理化学
电极
电化学
工程类
作者
Shaojie Gao,Shaoyun Hao,Zhennan Huang,Yifei Yuan,Song Han,Lecheng Lei,Xingwang Zhang,Reza Shahbazian‐Yassar,Jun Lü
标识
DOI:10.1038/s41467-020-15934-1
摘要
Abstract High-entropy alloy nanoparticles (HEA-NPs) are important class of materials with significant technological potential. However, the strategies for synthesizing uniformly dispersed HEA-NPs on granular supports such as carbon materials, γ-Al 2 O 3 , and zeolite, which is vital to their practical applications, are largely unexplored. Herein, we present a fast moving bed pyrolysis strategy to immobilize HEA-NPs on granular supports with a narrow size distribution of 2 nm up to denary (MnCoNiCuRhPdSnIrPtAu) HEA-NPs at 923 K. Fast moving bed pyrolysis strategy ensures the mixed metal precursors rapidly and simultaneously pyrolyzed at high temperatures, resulting in nuclei with a small size. The representative quinary (FeCoPdIrPt) HEA-NPs exhibit high stability (150 h) toward hydrogen evolution reaction with high mass activity, which is 26 times higher than the commercial Pt/C at an overpotential of 100 mV. Our strategy provides an improved methodology for synthesizing HEA-NPs on various supports.
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