烧结
聚结(物理)
催化作用
材料科学
铂金
炭黑
粒子(生态学)
纳米颗粒
金属颗粒
粒径
化学工程
纳米技术
复合材料
化学
物理
工程类
地质学
天然橡胶
海洋学
天体生物学
生物化学
作者
Pengfei Yin,Sulei Hu,Kun Qian,Zeyue Wei,Lele Zhang,Yue Lin,Weixin Huang,Haifeng Xiong,Wei‐Xue Li,Hai‐Wei Liang
标识
DOI:10.1038/s41467-021-25116-2
摘要
Abstract Supported metal nanoparticles are of universal importance in many industrial catalytic processes. Unfortunately, deactivation of supported metal catalysts via thermally induced sintering is a major concern especially for high-temperature reactions. Here, we demonstrate that the particle distance as an inherent parameter plays a pivotal role in catalyst sintering. We employ carbon black supported platinum for the model study, in which the particle distance is well controlled by changing platinum loading and carbon black supports with varied surface areas. Accordingly, we quantify a critical particle distance of platinum nanoparticles on carbon supports, over which the sintering can be mitigated greatly up to 900 °C. Based on in-situ aberration-corrected high-angle annular dark-field scanning transmission electron and theoretical studies, we find that enlarging particle distance to over the critical distance suppress the particle coalescence, and the critical particle distance itself depends sensitively on the strength of metal-support interactions.
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