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石墨烯/六角化O2激活和CO氧化异构结构:设计为无金属催化剂

Keke Mao¹, Wei Zhang², Jian Jiang³

¹School of Energy and Environment, Anhui University of Technology, Maanshan, Anhui 243032, China.

The journal of physical chemistry letters

|January 17, 2024

概括

石墨烯/六角化 (h-BN) 异构结构令人惊地激活氧 (O2),与原始材料不同. 这些新型结构显示出有效的CO氧化催化剂的潜力.

科学领域:

材料科学材料科学材料科学
表面科学是一门学科.
催化剂是一种催化剂.

背景情况:

纯净石墨烯和六角化 (h-BN) 单层是化学惰性的,限制了它们的催化活性,以激活氧 (O2).
开发具有增强催化性能的新材料对于各种化学过程至关重要.

研究的目的:

为了研究石墨烯/h-BN异构的O2激活能力.
探索它们在CO氧化催化中的潜力.

主要方法:

十个具有不同接口类型的石墨烯/h-BN异构结构的理论设计.
对O2吸附和CO氧化反应路径和能量障碍的计算研究.

主要成果:

石墨烯/h-BN异构结构具有显著的O2激活能力.
缺电子的异构结构有助于低能障碍 (<0.4 eV) 的离散性O2吸附.
碳氧化可以在计算的能量屏障低至0.67 eV的情况下发生.

结论:

催化活性源于电子缺乏或电子丰富的电子积累以及电子丰富的异构结构中的低工作功能.
催化性能对接口类型敏感,但对BN替代品模式不敏感,这表明其广泛适用性.
石墨烯/h-BN的异构结构是O2激活和CO氧化催化剂的有希望的候选者.

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Catalysis

Catalysis

The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.