热电子和金属氧化物界面的表面化学

IF 8.2 1区 化学 Q1 CHEMISTRY, PHYSICAL
Si Woo Lee , Hyunhwa Lee , Yujin Park , Heeyoung Kim , Gabor A. Somorjai , Jeong Young Park
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引用次数: 11

摘要

表面和界面上能量转换和耗散的基本机制一直是表面科学界关注的重要问题。放热化学反应或光子吸收中的电子激发涉及通过非绝热电子激发产生不处于热平衡的高能电子或热电子。大量的实验和理论研究已经证明了激发态热电子对原子和分子过程的影响,它是表面能转换过程中的关键调节因子。金属-氧化物界面的电荷转移对混合金属-氧化物催化剂的催化性能有重要影响。为了了解热电子和金属-氧化物界面对表面反应的影响,人们开发了多种外电子检测方案,包括金属-绝缘体-金属和金属-半导体肖特基二极管。与表面等离子体耦合的催化剂表现出与热电子流动有关的特殊催化性能。在这篇综述中,我们概述了最近的研究成果,将热电子流动与发生在金属-氧化物界面的表面反应联系起来。本文报道了金属表面上热电子的观察以及热电子与催化活性和选择性之间的关系的最新研究。我们展示了纳米催化剂与表面等离子体耦合表面反应的最新研究结果,其中热电子传输是能量耗散和转换过程的关键过程。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Surface chemistry of hot electron and metal-oxide interfaces

Fundamental mechanisms for energy conversion and dissipation on surfaces and at interfaces have been significant issues in the community of surface science. Electronic excitation in exothermic chemical reactions or photon absorption involves the generation of energetic or hot electrons that are not in thermal equilibrium via non-adiabatic electronic excitation. A number of experimental and theoretical studies have demonstrated the influence of excited hot electrons on atomic and molecular processes, and it is a key moderator in the surface energy conversion process. The charge transfer through the metal-oxide interfaces has a significant impact on catalytic performance in mixed metal-oxide catalysts. In order to understand the influence of hot electrons and metal-oxide interfaces on the surface reactions, various detection schemes of exoelectron detection, including metal-insulator-metal and metal-semiconductor Schottky diodes, have been developed. Catalysts coupled with surface plasmons exhibit peculiar catalytic performance related to hot electron flow. In this review, we outline recent research efforts to relate hot electron flow with surface reactions occurring at metal-oxide interfaces. We report recent studies on the observation of hot electrons and the correlation between hot electrons and catalytic activity and selectivity on metallic surfaces. We show recent results from studies of surface reactions on nanocatalysts coupled with surface plasmons, where hot electron transport is the key process in energy dissipation and conversion processes.

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来源期刊
Surface Science Reports
Surface Science Reports 化学-物理:凝聚态物理
CiteScore
15.90
自引率
2.00%
发文量
9
审稿时长
178 days
期刊介绍: Surface Science Reports is a journal that specializes in invited review papers on experimental and theoretical studies in the physics, chemistry, and pioneering applications of surfaces, interfaces, and nanostructures. The topics covered in the journal aim to contribute to a better understanding of the fundamental phenomena that occur on surfaces and interfaces, as well as the application of this knowledge to the development of materials, processes, and devices. In this journal, the term "surfaces" encompasses all interfaces between solids, liquids, polymers, biomaterials, nanostructures, soft matter, gases, and vacuum. Additionally, the journal includes reviews of experimental techniques and methods used to characterize surfaces and surface processes, such as those based on the interactions of photons, electrons, and ions with surfaces.
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