尺寸对沉积金纳米颗粒表面氢吸附的影响。

Effect of Size on Hydrogen Adsorption on the Surface of Deposited Gold Nanoparticles.

作者信息

Gatin Andrey, Grishin Maxim, Dokhlikova Nadezhda, Ozerin Sergey, Sarvadii Sergey, Kharitonov Vasiliy, Shub Boris

机构信息

Semenov Institute of Chemical Physics Russian Academy of Sciences, 4 Kosygin street, Moscow 119991, Russia.

出版信息

Nanomaterials (Basel). 2019 Mar 3;9(3):344. doi: 10.3390/nano9030344.

DOI:10.3390/nano9030344

PMID:30832417

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6473957/

Abstract

An experimental study of molecular hydrogen adsorption on single gold nanoparticles of various sizes deposited on the surface of highly oriented pyrolytic graphite (HOPG) was carried out by means of scanning tunneling microscopy and spectroscopy. The effect of size on the HOPG/Au system was established. Hydrogen was dissociatively chemisorbed on the surface of gold nanoparticles with an average size of 5⁻6 nanometers. An increase in the size of nanoparticles to 10 nm or more led to hydrogen chemisorption being inhibited and unable to be detected.

摘要

通过扫描隧道显微镜和光谱学手段，对沉积在高度取向热解石墨（HOPG）表面的各种尺寸的单个金纳米颗粒上的分子氢吸附进行了实验研究。确定了尺寸对HOPG/Au体系的影响。氢以解离化学吸附的方式吸附在平均尺寸为5至6纳米的金纳米颗粒表面。当纳米颗粒尺寸增加到10纳米或更大时，氢的化学吸附受到抑制且无法检测到。