CAREER: SusChem: Reversible Ionic Surfactants for Surface-Clean, Supported Nanoparticle Catalysts

PI：Saunders，Steven R.建议编号：1651597机构：华盛顿州立大学标题：Career：SusChem：用于表面清洁的负载型纳米颗粒催化剂的可逆离子表面活性剂本提案的目标是开发合成可控制纳米颗粒的方法，该纳米颗粒可以沉积在催化剂载体上，而不使用钝化的有机表面活性剂。这一领域的进展可能导致具有非常高活性的负载型催化剂，这将使燃料和药品的生产具有成本效益和能源效率。这些材料还将使对颗粒大小在催化中的作用的基础研究成为可能。该方案的主要研究目标是利用可逆离子表面活性剂(REVIS)制备高活性的负载型纳米催化剂，这种催化剂不需要退火，比传统制备的负载型催化剂具有更强的抗烧结性。教育和外展目标旨在提高未被充分代表的农村高中生在STEM领域追求职业生涯的动力，并使本科生和研究生能够了解和利用纳米技术来解决现实世界的问题。可逆离子表面活性剂(REVIS)是一种可切换的分子，当施加外部物理刺激时，它们表现出截然不同的性质。在拟议的工作中，REVI可以被打开以作为有效的表面活性剂，然后被关闭以作为弱表面活性剂或非表面活性剂。推动这项研究的中心假设是基于这样的假设，即通过REVIS制备的负载型纳米颗粒比传统制备的催化剂具有更高的催化活性，并且不需要退火，并且不容易在高温下烧结。单分散的金属纳米粒子可以通过可切换的反胶束作为模板，然后利用REVI的可切换特性进行沉积，而不需要表面活性剂。由于所需的条件温和且处理简单，所提出的方法是可扩展的。

PI: Saunders, Steven R.Proposal Number: 1651597 Institution: Washington State University Title: CAREER: SusChem: Reversible Ionic Surfactants for Surface-Clean, Supported Nanoparticle CatalystsThe goal of this proposal is to develop methods of synthesizing size-controlled nanoparticles which can be deposited onto a catalyst support without the use of a passivating organic surfactant. Advancements in this field may lead to supported catalysts with very high activities, which will enable cost-effective and energy-efficient production of fuels and pharmaceuticals. These materials will also enable fundamental investigations into the role of particle size in catalysis. The main research objective of this proposal is to leverage Reversible Ionic Surfactants (RevIS) to prepare highly active supported nanoparticle catalysts that do not require annealing and are more resistant to sintering than traditionally prepared supported catalysts. The educational and outreach objectives aim to increase the motivation of underrepresented, rural high school students to pursue careers in STEM fields and to enable undergraduate and graduate students to understand and leverage nanotechnology to solve real world problems. Reversible Ionic Surfactants (RevIS) are switchable molecules which display drastically different properties when an external physical stimulus is applied. In the proposed work, the RevIS can be switched on to act as an efficient surfactant and then switched off to act as a weak surfactant or non-surfactant. The central hypothesis that motivates the proposed research is based on the assumption that supported nanoparticles prepared via RevIS are more catalytically active without needing to be annealed and less prone to sintering at high temperatures than traditionally prepared catalysts. Monodisperse metallic nanoparticles can be templated by a switchable reverse micelle and subsequently deposited surfactant-free by leveraging the switchable nature of the RevIS. The proposed approach is scalable due to the mild conditions and simplicity of the processing required.