SAXS Application for the Determination of the Gold Nanoparticle Sizes in Au/C Catalysts: Advantages over Other Methods

Author:

Larichev Yu. V.12,Moroz B. L.2,Pyrjaev P. A.1,Bukhtiyarov V. I.12

Affiliation:

1. Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences

2. Novosibirsk State University

Abstract

In the case of Au/C catalysts have been shown advantages of application SAXS with masking liquid technique for determining supported metal particle sizes compared with TEM and XRD as standard methods. According to SAXS data particle size distributions of gold in a wide range (1–50 nm) were obtained with full consideration of all size fractions of particles present in the samples under study. Also values of the mass fraction of “X-ray amorphous” gold particles with size less than 4 nm (WSAXS) were determined. It has been found that the oxidative treatment of the carbon support before deposition of metallic gold precursor complexes has a significant effect on the size distribution of gold particles in the final catalyst. Comparison of the results of measuring the rate of CO oxidation by an excess of moist air at 40°C on Au/C catalysts with the (WSAXS) values found for these catalysts showed that the catalytic activity increases exponentially as (WSAXS) increases. High activity in CO oxidation reaction was demonstrated by Au/C catalysts with (WSAXS) ≥ 80%.

Publisher

The Russian Academy of Sciences

Reference58 articles.

1. Haruta M. // Catal. Today. 1997. V. 36. P. 153.

2. Bond G.C., Louis C., Thompson D.T. Catalysis by Gold. London: Imperial College Press, 2006. 366 p.

3. Кустов Л.М. // Изв. АН. Сер. хим. 2013. № 4. С. 870.

4. Heterogeneous Gold Catalysts and Catalysis. Ed. Z. Ma, S. Dai. Cambridge (UK): Royal Society of Chemistry, 2014.

5. Haruta M., Tsubota S., Kobayashi T., Kageyama H., Genet M.J., Delmon B. // J. Catal. 1993. V. 144. P. 175.

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3