DataVXAdvanced MaterialsPaper
journal article·2023-09Open access

Spin‐Polarization Strategy for Enhanced Acidic Oxygen Evolution Activity

Ling Li, Jing Zhou, Xiao Wang, Jose Gracia, Manuel Valvidares, Jia Ke, Miaomiao Fang, Chenqi Shen, Jin‐Ming Chen, Yu‐Chung Chang, Chih‐Wen Pao, Su‐Yang Hsu, Jyh‐Fu Lee, Antonio Ruotolo, Yiying Chin, Zhiwei Hu, Xiaoqing Huang, Qi Shao

Advanced Materials· Volume 35· Issue 35
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Source abstract

Abstract

Abstract 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.
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Research context

Energy storageNanomaterialsCatalysis & surfaces

OpenAlex topics: Electrocatalysts for Energy Conversion · Advanced battery technologies research · Electrochemical Analysis and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

College of Chemistry Chemical Engineering and Materials Science Soochow University Jiangsu 215123 China

Key Laboratory of Interfacial Physics and Technology Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China

Max Planck Institute for Chemical Physics of Solids Nothnitzer Strasse 40 01187 Dresden Germany

Magnetocat S.L. Alicante Spain

ALBA Synchrotron Light Source E‐08290 Cerdanyola del Vall`es Barcelona 08290 Spain

National Synchrotron Radiation Research Center 101 Hsin‐Ann Road Hsinchu 30076 Taiwan

Department of Physics and Astronomy College of Charleston Charleston SC 29407 USA

Department of Physics National Chung Cheng University Chiayi 62102 Taiwan

State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China

Funding

National Natural Science Foundation of China · Suzhou Municipal Science and Technology Bureau · State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University

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