{"title":"Enhancing sulfur resistance of oxides in carbon monoxide oxidation by a high-entropy-stabilized strategy","authors":"Shengyu Du, Pengfei Zhang","doi":"10.1002/aic.18470","DOIUrl":null,"url":null,"abstract":"<p>Industrial chemical processes require sulfur-resistant catalysts, which reduce catalyst replacement costs and simplify process operations. Herein, a high-entropy-stabilized strategy was put forward for sulfur-resistant catalysis. A spinel high entropy (Zn<sub>0.2</sub>Mg<sub>0.2</sub>Cu<sub>0.2</sub>Mn<sub>0.2</sub>Co<sub>0.2</sub>Al<sub>2</sub>O<sub>4</sub>) was introduced by ball milling process with aluminum isopropoxide as the main precursor. Zn<sub>0.2</sub>Mg<sub>0.2</sub>Cu<sub>0.2</sub>Mn<sub>0.2</sub>Co<sub>0.2</sub>Al<sub>2</sub>O<sub>4</sub> possessed a high surface area of 171.2 m<sup>2</sup> g<sup>−1</sup>, higher than typical high-entropy oxides (HEOs). The high-entropy spinel catalyst exhibited better SO<sub>2</sub>-resistance performance in the oxidation of carbon monoxide, better than the simple oxides. The SO<sub>2</sub>-resistance of Zn<sub>0.2</sub>Mg<sub>0.2</sub>Cu<sub>0.2</sub>Mn<sub>0.2</sub>Co<sub>0.2</sub>Al<sub>2</sub>O<sub>4</sub> was primarily improved by reinforcing the stability of the oxide using a high-entropy structure to decrease the absorption of SO<sub>2</sub> on its surface. Any adsorbed SO<sub>2</sub> on the surface of the HEO was then selectively trapped by sacrificial metal ions with stronger electron-withdrawing ability, protecting the active center (Cu<sup>2+</sup>, Co<sup>2+</sup>) from poisoning. This work reveals the significance of high-entropy structures in sulfur resistance.</p>","PeriodicalId":120,"journal":{"name":"AIChE Journal","volume":null,"pages":null},"PeriodicalIF":3.5000,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"AIChE Journal","FirstCategoryId":"5","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/aic.18470","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Industrial chemical processes require sulfur-resistant catalysts, which reduce catalyst replacement costs and simplify process operations. Herein, a high-entropy-stabilized strategy was put forward for sulfur-resistant catalysis. A spinel high entropy (Zn0.2Mg0.2Cu0.2Mn0.2Co0.2Al2O4) was introduced by ball milling process with aluminum isopropoxide as the main precursor. Zn0.2Mg0.2Cu0.2Mn0.2Co0.2Al2O4 possessed a high surface area of 171.2 m2 g−1, higher than typical high-entropy oxides (HEOs). The high-entropy spinel catalyst exhibited better SO2-resistance performance in the oxidation of carbon monoxide, better than the simple oxides. The SO2-resistance of Zn0.2Mg0.2Cu0.2Mn0.2Co0.2Al2O4 was primarily improved by reinforcing the stability of the oxide using a high-entropy structure to decrease the absorption of SO2 on its surface. Any adsorbed SO2 on the surface of the HEO was then selectively trapped by sacrificial metal ions with stronger electron-withdrawing ability, protecting the active center (Cu2+, Co2+) from poisoning. This work reveals the significance of high-entropy structures in sulfur resistance.
期刊介绍:
The AIChE Journal is the premier research monthly in chemical engineering and related fields. This peer-reviewed and broad-based journal reports on the most important and latest technological advances in core areas of chemical engineering as well as in other relevant engineering disciplines. To keep abreast with the progressive outlook of the profession, the Journal has been expanding the scope of its editorial contents to include such fast developing areas as biotechnology, electrochemical engineering, and environmental engineering.
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