High SO2 resistance, ultra-low noble metal content, hydrophobic Pt/CeO2 composites for CO oxidation

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-04-29 DOI:10.1016/j.colsurfa.2025.137072

Xiaoxuan Fan, Xinru Qi, Liang Li

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引用次数: 0

Abstract

CO oxidation in the presence of water and sulfur dioxide remains a significant challenge nowadays. Traditional CO oxidation catalysts are easily deactivated under such conditions, primarily due to sulfate formation on the surface. Herein, a hydrophobic Pt/CeO₂ composite with ultra-low noble metal content was fabricated via in-situ modification using silane coupling agents. The resulting composites demonstrate 100 % CO conversion and exceptional stability, even at temperatures below 80 °C, surpassing many recently reported catalysts. FTIR analysis confirmed the successful modification and hydrophobicity of the composite surface, while X-ray photoelectron spectroscopy showed no detectable sulfur element species deposition after long-term durability tests, highlighting its strong SO₂ resistance. This low-cost, remarkable sulfur resistance and, excellent stability, offer a promising pathway for a wide range of potential applications.

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高抗SO2性，超低贵金属含量，用于CO氧化的疏水Pt/CeO2复合材料

在水和二氧化硫存在的情况下，CO氧化仍然是当今的一个重大挑战。传统的CO氧化催化剂在这种条件下很容易失活，主要是由于表面形成硫酸盐。本文采用硅烷偶联剂原位改性制备了超低贵金属含量的疏水Pt/CeO2复合材料。所得到的复合材料具有100% %的CO转化率和优异的稳定性，即使在低于80°C的温度下，也超过了许多最近报道的催化剂。FTIR分析证实了复合材料表面改性成功且具有疏水性，而x射线光电子能谱经长期耐久性测试未检测到硫元素物质沉积，突出了其较强的抗SO2能力。这种低成本、卓越的抗硫性和优异的稳定性，为广泛的潜在应用提供了一条有希望的途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Colloids and Surfaces A: Physicochemical and Engineering Aspects 化学-物理化学

CiteScore

8.70

自引率

9.60%

发文量

2421

审稿时长

56 days

期刊介绍： Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.