Hydrogen donation of bio-acids over transition metal facets: A Density Functional Theory study

Jiajun Zhang; Xiaolei Zhang; Amin Osatiashtiani; Anthony Bridgwater

doi:10.1016/j.apcata.2019.117218

Hydrogen donation of bio-acids over transition metal facets: A Density Functional Theory study

Jiajun Zhang, Xiaolei Zhang, Amin Osatiashtiani, Anthony Bridgwater

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

Abstract

Bio-acids produced from biomass fast pyrolysis are regarded as alternative hydrogen source for upgrading bio-oil into transport fuels. In this work, the hydrogen donation performance of acetic acid (AcOH) and formic acid (FA) were evaluated over the transition metal facet in comparison with H2 gas, using Density Functional Theory (DFT) modelling. It was revealed that Mo (110) led to stronger binding with the bio-acid molecule than other base transition metals, and the consequent electrons migration significantly facilitated the bio-acids decomposition. AcOH exhibited a greater potential than FA as a hydrogen donor over Mo (110) because it released more H atoms with low energy barriers. H2 gas showed undoubtable merits of dissociative adsorption with negligible energy barrier over Mo (110). However, the larger enthalpy changes from the exothermic decomposition of bio-acids would probably more facilitate the activation and migration of the individual H atoms for their donation compared to H2 gas.

Original language	English
Article number	117218
Journal	Applied Catalysis A: General
Volume	586
Early online date	26 Aug 2019
DOIs	https://doi.org/10.1016/j.apcata.2019.117218
Publication status	Published - 25 Sept 2019

Bibliographical note

© 2019, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

Funding: Leverhulme Trust Research Grant (RPG-2017-254) and EPSRC First Grant (EP/R010986/1). The authors are also grateful for computational support from the UK Materials and Molecular Modelling Hub, which is partially funded by EPSRC (EP/P020194), for which access was obtained via the UKCP consortium and funded by EPSRC grant ref EP/P022561/1.

Keywords

Catalytic decomposition
DFT modelling
Hydrodeoxygenation
Hydrogen donor compounds
Transition metals

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10.1016/j.apcata.2019.117218

Hydrogen donation of bio-acids over transition metal facetsAccepted author manuscript, 953 KBLicence: CC BY-NC-ND 3.0

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title = "Hydrogen donation of bio-acids over transition metal facets: A Density Functional Theory study",

abstract = "Bio-acids produced from biomass fast pyrolysis are regarded as alternative hydrogen source for upgrading bio-oil into transport fuels. In this work, the hydrogen donation performance of acetic acid (AcOH) and formic acid (FA) were evaluated over the transition metal facet in comparison with H2 gas, using Density Functional Theory (DFT) modelling. It was revealed that Mo (110) led to stronger binding with the bio-acid molecule than other base transition metals, and the consequent electrons migration significantly facilitated the bio-acids decomposition. AcOH exhibited a greater potential than FA as a hydrogen donor over Mo (110) because it released more H atoms with low energy barriers. H2 gas showed undoubtable merits of dissociative adsorption with negligible energy barrier over Mo (110). However, the larger enthalpy changes from the exothermic decomposition of bio-acids would probably more facilitate the activation and migration of the individual H atoms for their donation compared to H2 gas.",

keywords = "Catalytic decomposition, DFT modelling, Hydrodeoxygenation, Hydrogen donor compounds, Transition metals",

author = "Jiajun Zhang and Xiaolei Zhang and Amin Osatiashtiani and Anthony Bridgwater",

note = "{\textcopyright} 2019, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ Funding: Leverhulme Trust Research Grant (RPG-2017-254) and EPSRC First Grant (EP/R010986/1). The authors are also grateful for computational support from the UK Materials and Molecular Modelling Hub, which is partially funded by EPSRC (EP/P020194), for which access was obtained via the UKCP consortium and funded by EPSRC grant ref EP/P022561/1.",

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AU - Zhang, Jiajun

AU - Zhang, Xiaolei

AU - Osatiashtiani, Amin

AU - Bridgwater, Anthony

N1 - © 2019, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ Funding: Leverhulme Trust Research Grant (RPG-2017-254) and EPSRC First Grant (EP/R010986/1). The authors are also grateful for computational support from the UK Materials and Molecular Modelling Hub, which is partially funded by EPSRC (EP/P020194), for which access was obtained via the UKCP consortium and funded by EPSRC grant ref EP/P022561/1.

PY - 2019/9/25

Y1 - 2019/9/25

N2 - Bio-acids produced from biomass fast pyrolysis are regarded as alternative hydrogen source for upgrading bio-oil into transport fuels. In this work, the hydrogen donation performance of acetic acid (AcOH) and formic acid (FA) were evaluated over the transition metal facet in comparison with H2 gas, using Density Functional Theory (DFT) modelling. It was revealed that Mo (110) led to stronger binding with the bio-acid molecule than other base transition metals, and the consequent electrons migration significantly facilitated the bio-acids decomposition. AcOH exhibited a greater potential than FA as a hydrogen donor over Mo (110) because it released more H atoms with low energy barriers. H2 gas showed undoubtable merits of dissociative adsorption with negligible energy barrier over Mo (110). However, the larger enthalpy changes from the exothermic decomposition of bio-acids would probably more facilitate the activation and migration of the individual H atoms for their donation compared to H2 gas.

AB - Bio-acids produced from biomass fast pyrolysis are regarded as alternative hydrogen source for upgrading bio-oil into transport fuels. In this work, the hydrogen donation performance of acetic acid (AcOH) and formic acid (FA) were evaluated over the transition metal facet in comparison with H2 gas, using Density Functional Theory (DFT) modelling. It was revealed that Mo (110) led to stronger binding with the bio-acid molecule than other base transition metals, and the consequent electrons migration significantly facilitated the bio-acids decomposition. AcOH exhibited a greater potential than FA as a hydrogen donor over Mo (110) because it released more H atoms with low energy barriers. H2 gas showed undoubtable merits of dissociative adsorption with negligible energy barrier over Mo (110). However, the larger enthalpy changes from the exothermic decomposition of bio-acids would probably more facilitate the activation and migration of the individual H atoms for their donation compared to H2 gas.

KW - Catalytic decomposition

KW - DFT modelling

KW - Hydrodeoxygenation

KW - Hydrogen donor compounds

KW - Transition metals

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JF - Applied Catalysis A: General

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ER -

Hydrogen donation of bio-acids over transition metal facets: A Density Functional Theory study

Abstract

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Keywords

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The mechanism of hydrogen donation by bio-acids over metal supported on nitrogen-doped carbon nanotubes

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