Garstenauer Daniel, Nagaraju Myakala Stephen, Ayala Pablo, Rabl-Wolff Hannah, Zobač Ondrej, Jirsa Franz, Eder Dominik, Cherevan Alexey, Richter Klaus W
Department of Functional Materials & Catalysis, University of Vienna Josef-Holaubek-Platz 2 1090 Vienna Austria
Vienna Doctoral School in Chemistry, University of Vienna Währinger Straße 42 1090 Vienna Austria.
Sustain Energy Fuels. 2025 May 19. doi: 10.1039/d5se00487j.
Intermetallic compounds hold great potential owing to the possibility of fine tuning their structure- and composition-dependent catalytic properties. Herein, a series of intermetallic Pt-Zn nanoparticles decorated on a TiO support was designed a novel and facile direct vapour-solid synthesis approach, and their co-catalytic performance towards the light-driven hydrogen evolution reaction (HER) was investigated. The intrinsic activity of Pt/TiO was almost doubled the addition of Zn and the formation of Pt-Zn/TiO, achieving a substantial increase in the apparent quantum yield (AQY) values up to 10.3%. In contrast to Pt-Zn intermetallic co-catalysts generally exhibiting higher HER rates, the interaction of Zn with surface defects of TiO enhanced the catalyst stability, resulting in strongly suppressed deactivation. This work introduces intermetallic cocatalysts as promising systems, highlighting the influence of composition and structure on catalyst activity and providing future research directions.
金属间化合物因其能够精细调节其与结构和组成相关的催化性能而具有巨大潜力。在此，通过一种新颖且简便的直接气-固合成方法，设计了一系列负载在TiO载体上的金属间Pt-Zn纳米颗粒，并研究了它们对光驱动析氢反应（HER）的共催化性能。通过添加Zn和形成Pt-Zn/TiO，Pt/TiO的本征活性几乎提高了一倍，表观量子产率（AQY）值大幅提高，最高可达10.3%。与通常表现出较高HER速率的Pt-Zn金属间共催化剂不同，Zn与TiO表面缺陷的相互作用增强了催化剂的稳定性，从而强烈抑制了失活。这项工作引入了金属间共催化剂作为有前景的体系，突出了组成和结构对催化剂活性的影响，并提供了未来的研究方向。
