Graphite decorated Pt/α-Fe2O3 composite with outstanding CO oxidation performance in the presence of SO2 and moisture

IF 7.2 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering Pub Date : 2025-09-13 DOI:10.1016/j.jece.2025.119273

Xinru Qi, Xiaoxuan Fan, Liang Li

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Abstract

A graphite-decorated Pt/α-Fe₂O₃ composite with ultra-low Pt content was successfully developed via co-precipitation and surface engineering. The integration of hydrophobic expanded graphite (EG) with the redox-active Pt/α-Fe₂O₃ significantly enhances CO catalytic oxidation activity and resistance to poisoning. Complete CO conversion was achieved below 100 °C at a space velocity of 30,000 mL·g⁻¹·h⁻¹, significantly outperforming conventional Pt/α-Fe₂O₃ (150 °C) and reported catalysts, such as Pt/CeO₂ (120 °C) and Pt/ZrO₂ (135 °C). X-ray photoelectron spectroscopy (XPS) revealed no sulfur accumulation on the catalyst's surface after a 48-hour durability test in simulated steel flue gas, indicating excellent SO₂ and moisture tolerance. These features highlight its promise for fuel gas purification and automotive exhaust treatment in sulfur-rich environments.

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在SO2和水分存在下，石墨修饰Pt/α-Fe2O3复合材料具有优异的CO氧化性能

通过共沉淀法和表面工程技术，成功制备了超低Pt含量的石墨修饰Pt/α-Fe2O3复合材料。疏水膨胀石墨（EG）与氧化还原活性Pt/α-Fe2O3的结合显著提高了CO的催化氧化活性和抗中毒能力。在低于100°C的条件下，在30,000 mL·g−1·h−1的空速下实现了完全的CO转化，显著优于传统的Pt/α-Fe2O3（150°C）和报道的Pt/CeO2（120°C）和Pt/ZrO2（135°C）催化剂。x射线光电子能谱（XPS）显示，在模拟钢铁烟气中进行48小时耐久性测试后，催化剂表面没有硫积累，表明其具有优异的SO2和耐湿性。这些特点突出了其在燃料气体净化和富硫环境中的汽车尾气处理方面的前景。

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

Journal of Environmental Chemical Engineering Environmental Science-Pollution

CiteScore

11.40

自引率

6.50%

发文量

2017

审稿时长

27 days

期刊介绍： The Journal of Environmental Chemical Engineering (JECE) serves as a platform for the dissemination of original and innovative research focusing on the advancement of environmentally-friendly, sustainable technologies. JECE emphasizes the transition towards a carbon-neutral circular economy and a self-sufficient bio-based economy. Topics covered include soil, water, wastewater, and air decontamination; pollution monitoring, prevention, and control; advanced analytics, sensors, impact and risk assessment methodologies in environmental chemical engineering; resource recovery (water, nutrients, materials, energy); industrial ecology; valorization of waste streams; waste management (including e-waste); climate-water-energy-food nexus; novel materials for environmental, chemical, and energy applications; sustainability and environmental safety; water digitalization, water data science, and machine learning; process integration and intensification; recent developments in green chemistry for synthesis, catalysis, and energy; and original research on contaminants of emerging concern, persistent chemicals, and priority substances, including microplastics, nanoplastics, nanomaterials, micropollutants, antimicrobial resistance genes, and emerging pathogens (viruses, bacteria, parasites) of environmental significance.