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@ARTICLE{Park:872774,
      author       = {Park, Heeyong and Schleker, P. Philipp M. and Liu, Zigeng
                      and Kowalew, Natalia and Stamm, Teresa and Schlögl, Robert
                      and Eichel, Rüdiger-A. and Heumann, Saskia and Granwehr,
                      Josef},
      title        = {{I}nsights into {W}ater {I}nteraction at the {I}nterface of
                      {N}itrogen-{F}unctionalized {H}ydrothermal {C}arbons},
      journal      = {The journal of physical chemistry / C C, Nanomaterials and
                      interfaces},
      volume       = {123},
      number       = {41},
      issn         = {1932-7455},
      address      = {Washington, DC},
      publisher    = {Soc.},
      reportid     = {FZJ-2020-00252},
      pages        = {25146 - 25156},
      year         = {2019},
      abstract     = {Hydrothermal carbon (HTC) derived from biomass is a class
                      of cost-efficient, eco-friendly functional carbon materials
                      with various potential applications. In this work,
                      solid-state nuclear magnetic resonance (NMR), longitudinal
                      (T1) relaxation time, and diffusion NMR were employed to
                      investigate the structure and water dynamics for HTC and
                      nitrogen-functionalized hydrothermal carbon (N-HTC) samples
                      ((N)-HTC). Results showed that the presence of N-functional
                      groups influences the water interaction with (N)-HTC more
                      strongly than surface area, pore size distribution, or
                      oxygenated functional groups. Furthermore, the degree of
                      water interaction can be tuned by adjusting the synthesis
                      temperature and the precursor ratio. Water motion was more
                      strongly inhibited in N-HTC than in N-free HTC, thereby
                      suggesting the existence of a differently structured
                      hydration shell around N-HTC particles. In addition, the
                      diffusion data of water in the N-HTC material show two
                      components that do not exchange on the time scale of the
                      experiment (tens of milliseconds), indicating a significant
                      fraction of slow mobile water that exists inside the
                      structure of N-HTC. 1H–2H isotope exchange and
                      cross-polarization NMR results show this internal water only
                      in a near-surface layer of the N-HTC particles. Based on
                      these findings, a model for water interaction with (N)-HTC
                      particles is proposed.},
      cin          = {IEK-9},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IEK-9-20110218},
      pnm          = {131 - Electrochemical Storage (POF3-131)},
      pid          = {G:(DE-HGF)POF3-131},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000492118400016},
      doi          = {10.1021/acs.jpcc.9b05323},
      url          = {https://juser.fz-juelich.de/record/872774},
}