Crystal Shape Controlled H2 Storage Rate in Nanoporous Carbon Composite with Ultra-Fine Pt Nanoparticle
Tsan-Yao Chen1*, Cheng-Si Tsao2, Alice Hu3
1Departmeot of Engineering and System Science, National Tsing Hua University, Hsinchu, Taiwan
2Institute of Nuclear Energy Research, Atomic Energy Council, Executive Yuan, Taoyuan City, Taiwan
3Department of mechanical and biomedical engineering, City University of Hong Kong, Hong Kong, China
* presenting author:Tsan-Yao Chen,
This study demonstrates that the hydrogen storage rate (HSR) of nanoporous carbon supported platinum nanocatalysts (NC) is determined by their heterojunction and geometric configurations. Among the steps in hydrogen storage, decomposition of H2 molecule into 2H atoms on Pt NC surface is the deciding factor in HSR that is controlled by the thickness of Pt NC. For the best condition, HSR of Pt NC in 1 ~ 2 atomic layers thick (4.7 μg/g min) is 2.6 times faster than that (1.3 μg/g min) of Pt NC with higher than 3 atomic layers thick.

Keywords: X-ray absorption spectroscopy, in-elastic neutron scattering, Hydrogen storage, heterogeneous catalyst