TY - JOUR
T1 - Water splitting for hydrogen chemisorption in graphene oxide dynamically evolving to a graphane character lattice
AU - Ciammaruchi, L.
AU - Bellucci, Luca
AU - Castillo, Gabriel Comerón
AU - Sánchez, Guillermo Martínez Denegri
AU - Liu, Quan
AU - Tozzini, Valentina
AU - Martorell, J.
N1 - Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/11/1
Y1 - 2019/11/1
N2 - Graphane offers a safe and high capacity hydrogen storage. Unfortunately, production of graphane directly from its parent material graphene requires breaking the extended π bond, implying either harsh chemical environments or highly energetic plasmas. In here, we propose to use graphene oxide (GO) to initially have the lattice irregularities and local curvature conferring to some of the carbons a favorable partial negative charge or a sp3 hybridization suitable for C–H bond formation. When GO covers the cathode of a water splitting cell powered at 1.7 V, we demonstrate an effective hydrogen chemisorption exhibiting a logarithmic growth with time. Such GO undergoes a dynamic evolution, combining a continuous change in the local corrugation and partial charge distribution with deoxygenation, opening additional sites for hydrogen chemisorption. Using density functional theory combined with the experimental parameters we can monitor the H atom gravimetric density increase as the water splitting experiment takes place.
AB - Graphane offers a safe and high capacity hydrogen storage. Unfortunately, production of graphane directly from its parent material graphene requires breaking the extended π bond, implying either harsh chemical environments or highly energetic plasmas. In here, we propose to use graphene oxide (GO) to initially have the lattice irregularities and local curvature conferring to some of the carbons a favorable partial negative charge or a sp3 hybridization suitable for C–H bond formation. When GO covers the cathode of a water splitting cell powered at 1.7 V, we demonstrate an effective hydrogen chemisorption exhibiting a logarithmic growth with time. Such GO undergoes a dynamic evolution, combining a continuous change in the local corrugation and partial charge distribution with deoxygenation, opening additional sites for hydrogen chemisorption. Using density functional theory combined with the experimental parameters we can monitor the H atom gravimetric density increase as the water splitting experiment takes place.
UR - http://www.scopus.com/inward/record.url?scp=85068804465&partnerID=8YFLogxK
U2 - 10.1016/j.carbon.2019.06.087
DO - 10.1016/j.carbon.2019.06.087
M3 - Article
AN - SCOPUS:85068804465
SN - 0008-6223
VL - 153
SP - 234
EP - 241
JO - Carbon
JF - Carbon
ER -