@article{201446, author = {Hyung SubSim and Richard A.Yetter and SungwookHong and Adri C.T.van Duin and Daniel M. Dabbs and Ilhan A. Aksay}, title = {Enhanced Fuel Decomposition in the Presence of Colloidal Functionalized Graphene Sheet-Supported Platinum Nanoparticles}, abstract = {
Experiments and simulations were used to demonstrate that decorating functionalized graphene sheets (FGSs) with platinum nanoparticles (Pt@FGS) stabilized these particles. Addition of these particles to liquid hydrocarbon fuels was observed to significantly affect decomposition under supercritical conditions at a pressure of 4.75 MPa and temperatures from 753 to 803 K. The suspension of only 50 ppmw Pt@FGS in the fuel (equivalent to adding 10 ppmw Pt) enhanced fuel conversion rates (by up to 24\%) with a major effect on specific product yields. The production of low-molecular-weight species increased in the pyrolysis products (with the hydrogen yield increasing by a factor of 12.5). ReaxFF molecular dynamics (MD) simulations supported a mechanism in which synergy between Pt and FGS catalyzed dehydrogenation during n-C12H26 pyrolysis. The highest conversion rates and greatest yields of hydrogen and low-molecular-weight species were observed for fuels containing Pt@FGS particles rather than those containing either FGSs or Pt-clusters alone. Analysis of the platinum decorated FGSs post reaction indicated no deterioration of the composite particles.
}, year = {2020}, journal = {ACS Appl. Energy Mater.}, volume = {3}, edition = {8}, pages = {7637{\textendash}7648}, url = {https://doi.org/10.1021/acsaem.0c01010}, language = {eng}, }