Piezotronic modulations in electro- and photochemical catalysis
Piezotronic modulations in electro- and photochemical catalysis
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DOI：
10.1557/mrs.2018.264
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发表时间：
2018-12
期刊：
影响因子：
5
通讯作者：
Xudong Wang;G. Rohrer;Hexing Li
中科院分区：
文献类型：
--
作者：
Xudong Wang;G. Rohrer;Hexing Li
电化学催化剂的设计和优化主要依赖于理解和促进界面电荷转移。最近，压电学已经成为一种很有前途的调整界面能级的方法。使用压电极化或铁电极化的独特的带状工程能力可以导致电化学催化性能的提高，而不是通过化学或结构优化所能实现的。本文讨论了固-液界面上表面极化的基本原理和相应的带调制。从催化的多个角度讨论了压电调制的最新进展，包括光催化、光电化学和电化学过程，特别是在与能源相关的应用方面。以机械驱动的水分离为例，介绍了压电催化的概念，即机械能到化学能的直接转换。虽然还处于早期阶段，但人们预计压电学将成为革命性的电化学催化的有力工具。
Electrochemical catalyst design and optimization primarily relies on understanding and facilitating interfacial charge transfer. Recently, piezotronics have emerged as a promising method for tuning the interfacial energetics. The unique band-engineering capability using piezoelectric or ferroelectric polarization could lead to performance gains for electrochemical catalysis beyond what can be achieved by chemical or structural optimization. This article addresses the fundamentals of surface polarization and corresponding band modulation at solid–liquid interfaces. The most recent advances in piezotronic modulations are discussed from multiple perspectives of catalysis, including photocatalytic, photoelectrochemical, and electrochemical processes, particularly for energy-related applications. The concept of piezocatalysis, a direct conversion of mechanical energy to chemical energy, is introduced with an example of mechanically driven water splitting. While still in the early stages, piezotronics is envisioned to become a powerful tool for revolutionizing electrochemical catalysis.