Journal
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
Volume 31, Issue 4, Pages 514-520Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.pnsc.2021.06.009
Keywords
Cycle performance; Hydrogen storage; Hydrogen spillover effect; Agglomeration; Defects
Funding
- National Key R&D Program of China [2018YFB1502101]
- State Key Laboratory of Long-life High Temperature Materials, China [DECSKL202110]
- Fundamental Research Funds for Central Universities, China
Ask authors/readers for more resources
By using a high temperature thermal reduction method, Pd/N-rGO was synthesized and its hydrogen absorption-desorption cycle performance was investigated. The study showed that the decrease in hydrogen storage capacity after cycling was mainly due to the shedding and aggregation of palladium nanoparticles.
As a hydrogen storage material, palladium nanoparticle decorated nitrogen doped graphene (Pd/N-rGO) has drawn much attention owing to its high absorption capacity at moderate conditions. However, its hydrogen absorption-desorption cycle performance, which is essential for their practical application, has been rarely studied. In this paper, a simple and convenient high temperature thermal reduction method was used to synthesize nitrogen-doped graphene decorated with Pd nanoparticles (Pd/N-rGO). Taken it as a representative, the hydrogen absorption-desorption cycle performance of Pd/N-rGO was investigated. The results showed that after three cycles the hydrogen storage capacity dropped from 2.9 wt% to 0.8 wt% at 25 degrees C and 4 MPa pressure. It was found that the palladium nanoparticles shed from Pd/N-RGO sheet after cycle performance test, and then agglomerated. These phenomena will weaken the hydrogen spillover effect, leading to the decrease of hydrogen storage capacity. Meanwhile, decreased defects reduce the hydrogen absorption sites, which will thus deteriorate the hydrogen storage capacity.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available