Robust Colloidal Synthesis of Palladium-Gold Alloy Nanoparticles for Hydrogen Sensing
Journal article, 2021

Metal nanoparticles are currently used in a variety of applications, ranging from life sciences to nanoelectronic devices to gas sensors. In particular, the use of palladium nanoparticles is gaining increasing attention due to their ability to catalyze the rapid dissociation of hydrogen, which leads to an excellent response in hydrogen-sensing applications. However, current palladium-nanoparticle-based sensors are hindered by the presence of hysteresis upon hydride formation and decomposition, as this hysteresis limits sensor accuracy. Here, we present a robust colloidal synthesis for palladium-gold alloy nanoparticles and demonstrate their hysteresis-free response when used for hydrogen detection. The obtained colloidal particles, synthesized in an aqueous, room-temperature environment, can be tailored to a variety of applications through changing the size, ratio of metals, and surface stabilization. In particular, the variation of the viscosity of the mixture during synthesis resulted in a highly tunable size distribution and contributed to a significant improvement in size dispersity compared to the state-of-the-art methods.


metal nanoparticles

palladium-gold alloys

colloidal synthesis

nanoparticle synthesis



Sarah Lerch

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry

Alicja Stolas

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry

Iwan Darmadi

Chalmers, Physics, Chemical Physics

Xin Wen

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry

Michal Strach

Chalmers, Physics, CMAL

Christoph Langhammer

Chalmers, Physics, Chemical Physics

Kasper Moth-Poulsen

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry

ACS Applied Materials & Interfaces

1944-8244 (ISSN) 1944-8252 (eISSN)

Vol. 13 38 45758-45767

Subject Categories

Materials Chemistry

Other Chemical Engineering



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