Abstract
Novel Ru-core Ir-shell catalyst-integrated porous transport electrodes (PTEs) for polymer electrolyte membrane water electrolysis (PEMWE) cells are prepared, in which Ru-core Ir-shell catalyst nanostructures are directly deposited onto a porous transport layer (PTL) via arc plasma deposition (APD). The PTL has a nanostructured TiO2 surface prepared via NaOH etching, acting as a catalyst support. The performance and durability of these Ru-core Ir-shell catalysts depend strongly on the ratio of Ir and Ru. The current-voltage (I–V) characteristics of PEMWE cells were improved by applying these core-shell catalysts with a low Ir loading of around 0.1 mg cm−2. The core-shell catalyst-integrated PTEs can operate at current densities of up to 10 A cm−2 without exhibiting limiting current behavior. This unique combination of the core-shell catalyst and the PTE structure enables PEMWE cell operation with low iridium loading and high current density, potentially reducing the cost of green hydrogen.
| Original language | English |
|---|---|
| Pages (from-to) | 169-183 |
| Number of pages | 15 |
| Journal | International Journal of Hydrogen Energy |
| Volume | 49 |
| Early online date | 25 Jul 2023 |
| DOIs | |
| Publication status | Published - 2 Jan 2024 |
Funding
Financial support from the Center of Innovation (COI) Program Grant Number JPMJCE1318 by the Japan Science and Technology Agency, Japan is gratefully acknowledged. A partial financial support by the Fukuoka Strategy Conference for Hydrogen Energy is also acknowledged.
Keywords
- polymer electrolyte membrane water electrolysis
- core-shell catalyst
- porous transport electrode
- high current density operation
- low iridium loading
