Increased hydrogen spillover by gaseous impurity: The Benson-Boudart method for dispersion revisited

Yuhe Wang; Ralph T. Yang

doi:10.1016/j.jcat.2008.09.013

Increased hydrogen spillover by gaseous impurity: The Benson-Boudart method for dispersion revisited

Yuhe Wang
, Ralph T. Yang

Department of Chemical and Biological Engineering

University at Buffalo

University of Michigan, Ann Arbor

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

A new bridge-building technique was used for facilitating H spillover on metal doped adsorbents for hydrogen storage at room temperature. By preadsorbing 1.0 × 10^-3 atm of CH₄ on Pt/AX-21 (superactivated carbon), the adsorbed amount of hydrogen increased by ∼100% at 1 atm and 25 °C, attributed to the adsorbed CH₄ serving as bridges for spillover. We conclude that the Benson-Boudart method can provide a good assessment for the dispersion of metals supported on Al₂O₃ (and zeolites). For carbon and SiO₂ supports, even with pure H₂, spillover leads to overestimates of dispersion, and any small amounts of gaseous impurities could lead to much greater overestimates.

Original language	English
Pages (from-to)	198-201
Number of pages	4
Journal	Journal of Catalysis
Volume	260
Issue number	1
DOIs	https://doi.org/10.1016/j.jcat.2008.09.013
State	Published - Nov 15 2008

Keywords

Benson-Boudart method
Bridge for spillover
Hydrogen spillover
Hydrogen storage
Metal dispersion

Access to Document

10.1016/j.jcat.2008.09.013

Cite this

@article{f0c5dec4a3264bcb9d7f2fda116fb020,

title = "Increased hydrogen spillover by gaseous impurity: The Benson-Boudart method for dispersion revisited",

abstract = "A new bridge-building technique was used for facilitating H spillover on metal doped adsorbents for hydrogen storage at room temperature. By preadsorbing 1.0 × 10-3 atm of CH4 on Pt/AX-21 (superactivated carbon), the adsorbed amount of hydrogen increased by ∼100\% at 1 atm and 25 °C, attributed to the adsorbed CH4 serving as bridges for spillover. We conclude that the Benson-Boudart method can provide a good assessment for the dispersion of metals supported on Al2O3 (and zeolites). For carbon and SiO2 supports, even with pure H2, spillover leads to overestimates of dispersion, and any small amounts of gaseous impurities could lead to much greater overestimates.",

keywords = "Benson-Boudart method, Bridge for spillover, Hydrogen spillover, Hydrogen storage, Metal dispersion",

author = "Yuhe Wang and Yang, \{Ralph T.\}",

year = "2008",

month = nov,

day = "15",

doi = "10.1016/j.jcat.2008.09.013",

language = "English",

volume = "260",

pages = "198--201",

journal = "Journal of Catalysis",

issn = "0021-9517",

publisher = "Academic Press Inc.",

number = "1",

}

TY - JOUR

T1 - Increased hydrogen spillover by gaseous impurity

T2 - The Benson-Boudart method for dispersion revisited

AU - Wang, Yuhe

AU - Yang, Ralph T.

PY - 2008/11/15

Y1 - 2008/11/15

N2 - A new bridge-building technique was used for facilitating H spillover on metal doped adsorbents for hydrogen storage at room temperature. By preadsorbing 1.0 × 10-3 atm of CH4 on Pt/AX-21 (superactivated carbon), the adsorbed amount of hydrogen increased by ∼100% at 1 atm and 25 °C, attributed to the adsorbed CH4 serving as bridges for spillover. We conclude that the Benson-Boudart method can provide a good assessment for the dispersion of metals supported on Al2O3 (and zeolites). For carbon and SiO2 supports, even with pure H2, spillover leads to overestimates of dispersion, and any small amounts of gaseous impurities could lead to much greater overestimates.

AB - A new bridge-building technique was used for facilitating H spillover on metal doped adsorbents for hydrogen storage at room temperature. By preadsorbing 1.0 × 10-3 atm of CH4 on Pt/AX-21 (superactivated carbon), the adsorbed amount of hydrogen increased by ∼100% at 1 atm and 25 °C, attributed to the adsorbed CH4 serving as bridges for spillover. We conclude that the Benson-Boudart method can provide a good assessment for the dispersion of metals supported on Al2O3 (and zeolites). For carbon and SiO2 supports, even with pure H2, spillover leads to overestimates of dispersion, and any small amounts of gaseous impurities could lead to much greater overestimates.

KW - Benson-Boudart method

KW - Bridge for spillover

KW - Hydrogen spillover

KW - Hydrogen storage

KW - Metal dispersion

UR - https://www.scopus.com/pages/publications/54349123267

U2 - 10.1016/j.jcat.2008.09.013

DO - 10.1016/j.jcat.2008.09.013

M3 - Article

SN - 0021-9517

VL - 260

SP - 198

EP - 201

JO - Journal of Catalysis

JF - Journal of Catalysis

IS - 1

ER -

Increased hydrogen spillover by gaseous impurity: The Benson-Boudart method for dispersion revisited

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this