Aso Ryotaro, Midoh Yoshihiro, Tanigaki Toshiaki, Murakami Yasukazu
Department of Applied Quantum Physics and Nuclear Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
Graduate School of Information Science and Technology, Osaka University, 1-5 Yamadaoka, Suita, Osaka 565-0871, Japan.
Microscopy (Oxf). 2024 Jul 30;73(4):301-307. doi: 10.1093/jmicro/dfae018.
The charge state of supported metal catalysts is the key to understand the elementary processes involved in catalytic reactions. However, high-precision charge analysis of the metal catalysts at the atomic level is experimentally challenging. To address this critical challenge, high-sensitivity electron holography has recently been successfully applied for precisely measuring the elementary charges on individual platinum nanoparticles supported on a titanium dioxide surface. In this review, we introduce the latest advancements in high-precision charge analysis and discuss the mechanisms of charge transfer at the metal-support interface. The development of charge measurements is entering a new era, and charge analyses under conditions closer to practical working environments, such as real-time, real-space, and reactive gas environments, are expected to be realized in the near future.
负载型金属催化剂的电荷状态是理解催化反应中所涉及的基本过程的关键。然而，在原子水平上对金属催化剂进行高精度电荷分析在实验上具有挑战性。为应对这一关键挑战，高灵敏度电子全息术最近已成功应用于精确测量负载在二氧化钛表面的单个铂纳米颗粒上的基本电荷。在本综述中，我们介绍了高精度电荷分析的最新进展，并讨论了金属-载体界面处的电荷转移机制。电荷测量的发展正在进入一个新时代，预计在不久的将来能够实现更接近实际工作环境条件下的电荷分析，如实时、实空间和反应性气体环境。
