Bibliographic Details
| Title: |
Stabilizing non-iridium active sites by non-stoichiometric oxide for acidic water oxidation at high current density |
| Authors: |
Lingxi Zhou, Yangfan Shao, Fang Yin, Jia Li, Feiyu Kang, Ruitao Lv |
| Source: |
Nature Communications, Vol 14, Iss 1, Pp 1-12 (2023) |
| Publisher Information: |
Nature Portfolio, 2023. |
| Publication Year: |
2023 |
| Collection: |
LCC:Science |
| Subject Terms: |
Science |
| More Details: |
Abstract Stabilizing active sites of non-iridium-based oxygen evolution reaction (OER) electrocatalysts is crucial, but remains a big challenge for hydrogen production by acidic water splitting. Here, we report that non-stoichiometric Ti oxides (TiOx) can safeguard the Ru sites through structural-confinement and charge-redistribution, thereby extending the catalyst lifetime in acid by 10 orders of magnitude longer compared to that of the stoichiometric one (Ru/TiO2). By exploiting the redox interaction-engaged strategy, the in situ growth of TiOx on Ti foam and the loading of Ru nanoparticles are realized in one step. The as-synthesized binder-free Ru/TiOx catalyst exhibits low OER overpotentials of 174 and 265 mV at 10 and 500 mA cm−2, respectively. Experimental characterizations and theoretical calculations confirm that TiOx stabilizes the Ru active center, enabling operation at 10 mA cm−2 for over 37 days. This work opens an avenue of using non-stoichiometric compounds as stable and active materials for energy technologies. |
| Document Type: |
article |
| File Description: |
electronic resource |
| Language: |
English |
| ISSN: |
2041-1723 |
| Relation: |
https://doaj.org/toc/2041-1723 |
| DOI: |
10.1038/s41467-023-43466-x |
| Access URL: |
https://doaj.org/article/a3b8b987ecb4427aaada42f851728342 |
| Accession Number: |
edsdoj.3b8b987ecb4427aaada42f851728342 |
| Database: |
Directory of Open Access Journals |
