WO3 dehydration and phase transition as the catalytic driver of hydrogen production by non-calcinated WO3

Lior Carmel; Shiran Aharon; Dan Meyerstein; Yael Albo; Lonia Friedlander; Dror Shamir; Ariela Burg

doi:10.1016/j.ijhydene.2023.07.351

WO₃ dehydration and phase transition as the catalytic driver of hydrogen production by non-calcinated WO₃

Lior Carmel, Shiran Aharon, Dan Meyerstein, Yael Albo, Lonia Friedlander, Dror Shamir, Ariela Burg

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

1 Scopus citations

Abstract

In this study, WO₃ (trioxide tungsten) was investigated as a catalyst for water reduction by NaBH₄ in basic conditions, which are not typical for NaBH₄ reduction processes. The results indicate that the structure of the WO₃ phase strongly affects the catalytic process. The uncalcinated WO_3, ncWO₃, which contains primarily tungstite with traces of hydro-tungstite is the only WO₃ form that acts as an effective catalyst. A cubic WO₃ is formed or exposed during the reduction process. Hydrogen production increases during reaction cycles; an interesting and important result. Plausible mechanisms of the catalytic process observed are outlined. The results have far-reaching effects that should be further investigated in other systems, such as the phase structures acting as a catalyst for treating toxic organic compounds.

Original language	English
Journal	International Journal of Hydrogen Energy
DOIs	https://doi.org/10.1016/j.ijhydene.2023.07.351
State	Accepted/In press - 1 Jan 2023

Keywords

Catalysis
HER
Hydrated tungstite
Hydrogen
Hydrotungstite
NaBH

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Fuel Technology
Condensed Matter Physics
Energy Engineering and Power Technology

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.ijhydene.2023.07.351

Cite this

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title = "WO3 dehydration and phase transition as the catalytic driver of hydrogen production by non-calcinated WO3",

abstract = "In this study, WO3 (trioxide tungsten) was investigated as a catalyst for water reduction by NaBH4 in basic conditions, which are not typical for NaBH4 reduction processes. The results indicate that the structure of the WO3 phase strongly affects the catalytic process. The uncalcinated WO3, ncWO3, which contains primarily tungstite with traces of hydro-tungstite is the only WO3 form that acts as an effective catalyst. A cubic WO3 is formed or exposed during the reduction process. Hydrogen production increases during reaction cycles; an interesting and important result. Plausible mechanisms of the catalytic process observed are outlined. The results have far-reaching effects that should be further investigated in other systems, such as the phase structures acting as a catalyst for treating toxic organic compounds.",

keywords = "Catalysis, HER, Hydrated tungstite, Hydrogen, Hydrotungstite, NaBH",

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doi = "10.1016/j.ijhydene.2023.07.351",

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AU - Carmel, Lior

AU - Aharon, Shiran

AU - Meyerstein, Dan

AU - Albo, Yael

AU - Friedlander, Lonia

AU - Shamir, Dror

AU - Burg, Ariela

PY - 2023/1/1

Y1 - 2023/1/1

N2 - In this study, WO3 (trioxide tungsten) was investigated as a catalyst for water reduction by NaBH4 in basic conditions, which are not typical for NaBH4 reduction processes. The results indicate that the structure of the WO3 phase strongly affects the catalytic process. The uncalcinated WO3, ncWO3, which contains primarily tungstite with traces of hydro-tungstite is the only WO3 form that acts as an effective catalyst. A cubic WO3 is formed or exposed during the reduction process. Hydrogen production increases during reaction cycles; an interesting and important result. Plausible mechanisms of the catalytic process observed are outlined. The results have far-reaching effects that should be further investigated in other systems, such as the phase structures acting as a catalyst for treating toxic organic compounds.

AB - In this study, WO3 (trioxide tungsten) was investigated as a catalyst for water reduction by NaBH4 in basic conditions, which are not typical for NaBH4 reduction processes. The results indicate that the structure of the WO3 phase strongly affects the catalytic process. The uncalcinated WO3, ncWO3, which contains primarily tungstite with traces of hydro-tungstite is the only WO3 form that acts as an effective catalyst. A cubic WO3 is formed or exposed during the reduction process. Hydrogen production increases during reaction cycles; an interesting and important result. Plausible mechanisms of the catalytic process observed are outlined. The results have far-reaching effects that should be further investigated in other systems, such as the phase structures acting as a catalyst for treating toxic organic compounds.

KW - Catalysis

KW - HER

KW - Hydrated tungstite

KW - Hydrogen

KW - Hydrotungstite

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