title: Evidence for ambient-temperature reversible catalytic hydrogenation in Pt-doped carbons.
abstract: In situ high-pressure Raman spectroscopy, with corroborating density functional calculations, is used to probe C-H chemical bonds formed when dissociated hydrogen diffuses from a platinum nanocatalyst to three distinct graphenic surfaces. At ambient temperature, hydrogenation and dehydrogenation are reversible in the combined presence of an active catalyst and oxygen heteroatoms. Hydrogenation apparently occurs through surface diffusion in a chemisorbed state, while dehydrogenation requires diffusion of the chemisorbed species back to an active catalyst.
authors.affiliation: Materials Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
authors.forename: Xiao Ming
authors.initials: XM
authors.lastname: Liu
authors.forename: Youjian
authors.initials: Y
authors.lastname: Tang
authors.forename: En Shi
authors.initials: ES
authors.lastname: Xu
authors.forename: Thomas C
authors.initials: TC
authors.lastname: Fitzgibbons
authors.forename: Gregory S
authors.initials: GS
authors.lastname: Larsen
authors.forename: Humberto R
authors.initials: HR
authors.lastname: Gutierrez
authors.forename: Huan-Hsiung
authors.initials: HH
authors.lastname: Tseng
authors.forename: Ming-Sheng
authors.initials: MS
authors.lastname: Yu
authors.forename: Cheng-Si
authors.initials: CS
authors.lastname: Tsao
authors.forename: John V
authors.initials: JV
authors.lastname: Badding
authors.forename: Vincent H
authors.initials: VH
authors.lastname: Crespi
authors.forename: Angela D
authors.initials: AD
authors.lastname: Lueking