Synthesis of micro-porous boron-substituted carbon (B/C) materials using polymeric precursors for hydrogen physisorption

T. C.Mike Chung, Youmi Jeong, Alfred Kleinhammes, Yue Wu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper discusses a novel route to prepare porous boron substituted carbon (B/C) materials that show a significantly higher hydrogen binding energy and physisorption capacity, compared with the corresponding carbonaceous (C) materials. The chemistry involves a designed boron-containing polymeric precursor, which is the polycondensation adducts between BCl3 and lithiated phenylene diacetylene. During pyrolysis, most of the boron moieties in the precursor were transformed into a B-substituted C fused ring structure, and the in situ formed LiCl by-products created a porous morphology. The resulting porous B/C material with 7% B content and 700 m2/g surface area has been prepared, which shows a reversible hydrogen physisorption capacity of 0.6 and 3.2 wt% at 293 and 77 K, respectively, under 40 bars hydrogen pressure. The physisorption results were further warranted by absorption isotherms and in situ 1H NMR studies, indicating a binding energy of hydrogen molecules of about 11 kJ/mole, significantly higher than the 4 kJ/mole reported on most C surfaces.

Original languageEnglish (US)
Title of host publicationHydrogen Production, Transport, and Storage 3
Pages57-66
Number of pages10
Edition10
DOIs
StatePublished - Dec 1 2009
EventHydrogen Production, Transport, and Storage 3 - 215th ECS Meeting - San Francisco, CA, United States
Duration: May 24 2009May 29 2009

Publication series

NameECS Transactions
Number10
Volume19
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

OtherHydrogen Production, Transport, and Storage 3 - 215th ECS Meeting
CountryUnited States
CitySan Francisco, CA
Period5/24/095/29/09

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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    Chung, T. C. M., Jeong, Y., Kleinhammes, A., & Wu, Y. (2009). Synthesis of micro-porous boron-substituted carbon (B/C) materials using polymeric precursors for hydrogen physisorption. In Hydrogen Production, Transport, and Storage 3 (10 ed., pp. 57-66). (ECS Transactions; Vol. 19, No. 10). https://doi.org/10.1149/1.3237108