Introducing titanium hydride on porous transport layer for more energy efficient water electrolysis with proton exchange membrane

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F23%3A43926877" target="_blank" >RIV/60461373:22310/23:43926877 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22810/23:43926877

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0378775323002884#gs2" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0378775323002884#gs2</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jpowsour.2023.232913" target="_blank" >10.1016/j.jpowsour.2023.232913</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Introducing titanium hydride on porous transport layer for more energy efficient water electrolysis with proton exchange membrane

Popis výsledku v původním jazyce

An extensive oxidation of the Ti occurs during proton exchange membrane (PEM) water electrolysis, leading to an increase in the ohmic resistance of the electrolyzer cell (RΩ) and lowered energy efficiency. This issue is often addressed by coating the anode components with platinum group metals. Our previous results showed that acid etching of the porous transport layer (PTL) leading to Ti depassivation and formation of a surface hydride, is an effective way to decrease the RΩ. Here, we aim to minimise the RΩ by a novel surface treatment of the PTL by combining Ti hydride formation with subsequent Ir coating. The PTL treatment consists of three steps: acid etching, electrochemical hydridation and final coating with Ir. Electrolysers with the modified PTLs were operated for three weeks. Electrochemical impedance spectroscopy was used to evaluate the time evolution of the RΩ. In comparison with pristine Ti PTL coated with Ir, the PTL with the full treatment achieved an additional 12% reduction in RΩ, resulting in a 15% increase in current density at 2 V. Therefore, the developed PTL treatment minimises the ohmic losses in PEM water electrolyser caused by PTL oxidation and leads to more energy efficient hydrogen production. © 2023 Elsevier B.V.

Název v anglickém jazyce

Introducing titanium hydride on porous transport layer for more energy efficient water electrolysis with proton exchange membrane

Popis výsledku anglicky

An extensive oxidation of the Ti occurs during proton exchange membrane (PEM) water electrolysis, leading to an increase in the ohmic resistance of the electrolyzer cell (RΩ) and lowered energy efficiency. This issue is often addressed by coating the anode components with platinum group metals. Our previous results showed that acid etching of the porous transport layer (PTL) leading to Ti depassivation and formation of a surface hydride, is an effective way to decrease the RΩ. Here, we aim to minimise the RΩ by a novel surface treatment of the PTL by combining Ti hydride formation with subsequent Ir coating. The PTL treatment consists of three steps: acid etching, electrochemical hydridation and final coating with Ir. Electrolysers with the modified PTLs were operated for three weeks. Electrochemical impedance spectroscopy was used to evaluate the time evolution of the RΩ. In comparison with pristine Ti PTL coated with Ir, the PTL with the full treatment achieved an additional 12% reduction in RΩ, resulting in a 15% increase in current density at 2 V. Therefore, the developed PTL treatment minimises the ohmic losses in PEM water electrolyser caused by PTL oxidation and leads to more energy efficient hydrogen production. © 2023 Elsevier B.V.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

—

OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

<a href="/cs/project/GC20-06422J" target="_blank" >GC20-06422J: Pokročilá nanostrukturovaná sestava membrány a elektrod se zdokonaleným přenosem hmoty a náboje pro elektrolýzu vody s protonově výměnnou membránou</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Power Sources

ISSN

0378-7753

e-ISSN

—

Svazek periodika

565

Číslo periodika v rámci svazku

1 May 2023

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

—

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-85150840147