A key theme of heterogeneous catalysis research is achieving control of the environment surrounding the active site to precisely steer the reactivity toward desired reaction products. One method toward this goal has been the use of organic ligands or self-assembled monolayers (SAMs) on metal nanoparticles. Metal-bound SAMs are typically employed to improve catalyst selectivity but often decrease the reaction rate as a result of site blocking from the ligands. Recently, the use of metal oxide-bound organic modifiers such as organophosphonic acid (PA) SAMs has shown promise as an additional method for tuning reactions on metal oxide surfaces as well as modifying oxide-supported metal catalysts. In this Account, we summarize recent approaches to enhance catalyst performance with oxide-bound monolayers. These approaches include (1) modification of metal oxide catalysts to tune surface reactions, (2) formation of SAMs on the oxide component of supported metal catalysts to modify sites at the metal–support interface, and (3) enhancement of catalyst performance (e.g., stability) through modification of sites remote from the active sites.

中文翻译：

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用金属氧化物上的有机单层控制多相催化

多相催化研究的一个关键主题是实现对活性位点周围环境的控制，以精确地将反应性导向所需的反应产物。实现这一目标的一种方法是在金属纳米颗粒上使用有机配体或自组装单层 (SAM)。金属结合的 SAM 通常用于提高催化剂的选择性，但由于配体的位点阻塞，通常会降低反应速率。最近，金属氧化物结合的有机改性剂如有机膦酸 (PA) SAM 的使用已显示出作为调节金属氧化物表面反应以及改性氧化物负载金属催化剂的另一种方法的前景。在这个帐户中，我们总结了最近通过氧化物结合的单层提高催化剂性能的方法。