Surface states of a Cu-Pd bimetal catalyst supported over SiO2 under CO atmosphere investigated by in situ infrared spectroscopy

IF 4.8 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General Pub Date : 2025-09-17 DOI:10.1016/j.apcata.2025.120576

Miyu Sayama , Makiko Abe , Natsuki Kaneko , Michinori Sumimoto , Junko N. Kondo , Yoshihisa Sakata

引用次数: 0

Abstract

The surface states of a Cu-Pd nanoparticles supported on SiO₂ was investigated by probing the states of adsorbed CO observed by in situ infrared (IR) spectroscopic examination. Here the investigation was carried out on Pd (10 at%)-containing Cu (10 wt%)-supported SiO₂, where the amount of adsorbed CO was maximum, indicating the effective activation of Cu metals by the addition of Pd. Particularly, under the atmosphere of relatively low CO pressures (below 10 Pa), the in situ IR spectra show the dynamic changes in the state of adsorbed CO originated from the rearrangement of surface atoms induced by CO adsorption over silica supported Cu-Pd bimetal nanoparticles. The details of changes in the surface states induced by CO adsorption are discussed.

查看原文本刊更多论文

用原位红外光谱法研究了CO气氛下SiO2负载Cu-Pd双金属催化剂的表面态

采用原位红外光谱法对Cu-Pd纳米颗粒吸附CO的状态进行探测，研究了Cu-Pd纳米颗粒在SiO2上的表面状态。本文对Pd(10 at%)-含Cu(10 wt%)-负载SiO2进行了研究，其中吸附CO的量最大，表明Pd对Cu金属的有效活化。特别是在相对较低的CO压力下（低于10 Pa），原位红外光谱显示了CO吸附状态的动态变化，这是由于二氧化硅负载的Cu-Pd双金属纳米颗粒吸附CO引起的表面原子重排所致。讨论了CO吸附引起的表面状态变化的细节。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Applied Catalysis A: General 化学-环境科学

CiteScore

9.00

自引率

5.50%

发文量

415

审稿时长

24 days

期刊介绍： Applied Catalysis A: General publishes original papers on all aspects of catalysis of basic and practical interest to chemical scientists in both industrial and academic fields, with an emphasis onnew understanding of catalysts and catalytic reactions, new catalytic materials, new techniques, and new processes, especially those that have potential practical implications. Papers that report results of a thorough study or optimization of systems or processes that are well understood, widely studied, or minor variations of known ones are discouraged. Authors should include statements in a separate section "Justification for Publication" of how the manuscript fits the scope of the journal in the cover letter to the editors. Submissions without such justification will be rejected without review.