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Title: Electron- and Thermal-Stimulated Synthesis of Water on Boehmite (y-AlOOH) Nanoplates

Abstract

Utilizing a combination of electron stimulated desorption, infrared spectroscopy and temperature program desorption measurements, we show that molecular water is synthesized during electron irradiation on boehmite nanoplates and postulate that the reaction proceeds first through decomposition of the hydroxyl to produce trapped hydrogen atoms. Once released, these hydrogen atoms can react with a neighboring hydroxyl resulting in adsorbed water. In addition, molecular water is readily formed on the surface of the boehmite nanosheets through thermal induced recombinative desorption. Peak water production via recombinative desorption occurs at 750 K in agreement with previous studies. We have also identified a weak desorption feature near 400 K which is likely strongly adsorbed water. The derived experimental desorption activation energy of water assuming full coverage is 98.6 kJ mol-1.

Authors:
 [1];  [2];  [3]; ORCiD logo [3];  [4]
  1. Georgia Institute of Technology
  2. Georgia Institute Of Technology
  3. BATTELLE (PACIFIC NW LAB)
  4. Georgia Institute of Technology, Georgia Tech Research Corporation
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1572491
Report Number(s):
PNNL-SA-145568
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Journal of Physical Chemistry C
Additional Journal Information:
Journal Volume: 123; Journal Issue: 31
Country of Publication:
United States
Language:
English

Citation Formats

Jones, Brant M., Aleksandrov, A, Zhang, Xin, Rosso, Kevin M., and Orlando, Thomas M. Electron- and Thermal-Stimulated Synthesis of Water on Boehmite (y-AlOOH) Nanoplates. United States: N. p., 2019. Web. doi:10.1021/acs.jpcc.9b03927.
Jones, Brant M., Aleksandrov, A, Zhang, Xin, Rosso, Kevin M., & Orlando, Thomas M. Electron- and Thermal-Stimulated Synthesis of Water on Boehmite (y-AlOOH) Nanoplates. United States. doi:10.1021/acs.jpcc.9b03927.
Jones, Brant M., Aleksandrov, A, Zhang, Xin, Rosso, Kevin M., and Orlando, Thomas M. Thu . "Electron- and Thermal-Stimulated Synthesis of Water on Boehmite (y-AlOOH) Nanoplates". United States. doi:10.1021/acs.jpcc.9b03927.
@article{osti_1572491,
title = {Electron- and Thermal-Stimulated Synthesis of Water on Boehmite (y-AlOOH) Nanoplates},
author = {Jones, Brant M. and Aleksandrov, A and Zhang, Xin and Rosso, Kevin M. and Orlando, Thomas M.},
abstractNote = {Utilizing a combination of electron stimulated desorption, infrared spectroscopy and temperature program desorption measurements, we show that molecular water is synthesized during electron irradiation on boehmite nanoplates and postulate that the reaction proceeds first through decomposition of the hydroxyl to produce trapped hydrogen atoms. Once released, these hydrogen atoms can react with a neighboring hydroxyl resulting in adsorbed water. In addition, molecular water is readily formed on the surface of the boehmite nanosheets through thermal induced recombinative desorption. Peak water production via recombinative desorption occurs at 750 K in agreement with previous studies. We have also identified a weak desorption feature near 400 K which is likely strongly adsorbed water. The derived experimental desorption activation energy of water assuming full coverage is 98.6 kJ mol-1.},
doi = {10.1021/acs.jpcc.9b03927},
journal = {Journal of Physical Chemistry C},
number = 31,
volume = 123,
place = {United States},
year = {2019},
month = {8}
}