Spin-Polarization Strategy for Enhanced Acidic Oxygen Evolution Activity

Spin-Polarization Strategy for Enhanced Acidic Oxygen Evolution Activity

© 2023 Wiley-VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 35(2023), 35 vom: 01. Sept., Seite e2302966
1. Verfasser: Li, Ling (VerfasserIn)
Weitere Verfasser: Zhou, Jing, Wang, Xiao, Gracia, Jose, Valvidares, Manuel, Ke, Jia, Fang, Miaomiao, Shen, Chenqi, Chen, Jin-Ming, Chang, Yu-Chung, Pao, Chih-Wen, Hsu, Su-Yang, Lee, Jyh-Fu, Ruotolo, Antonio, Chin, Yiying, Hu, Zhiwei, Huang, Xiaoqing, Shao, Qi
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2023
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article RuO2 acidic magnetic field oxygen evolution reaction spin
Beschreibung
Zusammenfassung:© 2023 Wiley-VCH GmbH.
Spin-polarization is known as a promising way to promote the anodic oxygen evolution reaction (OER), since the intermediates and products endow spin-dependent behaviors, yet it is rarely reported for ferromagnetic catalysts toward acidic OER practically used in industry. Herein, the first spin-polarization-mediated strategy is reported to create a net ferromagnetic moment in antiferromagnetic RuO2 via dilute manganese (Mn2+ ) (S = 5/2) doping for enhancing OER activity in acidic electrolyte. Element-selective X-ray magnetic circular dichroism reveals the ferromagnetic coupling between Mn and Ru ions, fulfilling the Goodenough-Kanamori rule. The ferromagnetism behavior at room temperature can be well interpreted by first principles calculations as the interaction between the Mn2+ impurity and Ru ions. Indeed, Mn-RuO2 nanoflakes exhibit a strongly magnetic field enhanced OER activity, with the lowest overpotential of 143 mV at 10 mA cmgeo -2 and negligible activity decay in 480 h stability (vs 200 mV/195 h without magnetic field) as known for magnetic effects in the literature. The intrinsic turnover frequency is also improved to reach 5.5 s-1 at 1.45 VRHE . This work highlights an important avenue of spin-engineering strategy for designing efficient acidic oxygen evolution catalysts
Beschreibung:Date Revised 01.09.2023
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.202302966