Printed Co3O4 film as an electrocatalyst for hydrogen production by a monolithic photovoltaic-electrolysis system
- Printed Co3O4 film as an electrocatalyst for hydrogen production by a monolithic photovoltaic-electrolysis system
- 전효상; 박원일; 김재훈; 김홍곤; 김웅; 민병권
- Co3O4; electrocatalysts; photovoltaic-electrolysis; Water splitting; Hydrogen; Nafion
- Issue Date
- International journal of hydrogen energy
- VOL 36, NO 3, 1924-1929
- In a monolithic photovoltaic-electrolysis system, photovoltaic and catalytic layers are
generally constructed on both sides of a conducting substrate. For the realization of this
architecture it is critical to fabricate the catalytic layer at sufficiently low temperature in
order not to deteriorate the photovoltaic photoanode that is already installed on the
reverse side of the catalytic layer. In this study we demonstrate successful fabrication of
Co3O4 electrocatalyst films at low temperature (~50℃) on a stainless steel substrate by
a paste coating method using Nafion as a binder. The Co3O4 films were found to be catalytically
efficient and stable in water splitting reaction in an alkaline aqueous solution.
More importantly, the Co3O4 films casted at low temperature (~50℃) revealed the highest
hydrogen production rate in the electrolytic cell compared to the films prepared at higher
temperatures (e.g. 150 and 300℃), which would be very beneficial in the construction of
a monolithic photovoltaic-electrolysis system.
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