Three-dimensional layered porous graphene aerogel hydrogen getters

Abstract

Organic getters are often introduced into sealed systems to remove the excessive reactive hydrogen gas. In this work, the formable graphene aerogel hydrogen getters are prepared by integrating the alkyne-containing molecules (e.g., DEB) into the palladium-loaded three-dimensional layered porous graphene aerogel (Pd-GA). The performance of Pd-GA/DEB composite materials in reducing reactive hydrogen gas is examined at pressures of 0.1–1 bar at a temperature of 25 °C, and the hydrogen consumption is measured as a function of time. Results suggest that the hydrogen uptake capability of Pd-GA/DEB getters increases with the loading of Pd particles on the GA and the content of Pd 0 . The highest hydrogen absorption capacity is up to 215.5 cm 3 /g, and the hydrogenation rate of DEB molecules is 89.3%. This study promotes the fundamental understanding of solid-phase catalytic hydrogenation and the applications of 3D layered porous graphene aerogel in hydrogen absorption. • A compressible and strong graphene aerogel (GA) was prepared by a gentle method. • The palladium (Pd) nanoparticles were uniformly supported on the GA. • The formable hydrogen getters were fabricated by integrating Pd-GA with DEB. • The highest hydrogen absorption capacity of Pd-GA/DEB was up to 215.5 cm 3 /g. • The GA can effectively disperse metal particles and accelerate hydrogen diffusion.