Spin Polarization of Chiral Amorphous Fe‐Ni Electrocatalysts Enabling Efficient Electrochemical Oxygen Evolution

Author:

Feng Tanglue1,Chen Weihua2,Xue Jie1,Cao Fangfang3,Chen Zhongwei1,Ye Jichun3,Xiao Chuanxiao34,Lu Haipeng1ORCID

Affiliation:

1. Department of Chemistry The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong SAR 999077 China

2. Department of Chemistry The University of Hong Kong Pokfulam Road Hong Kong 999077 P. R. China

3. Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo City Zhejiang Province 315201 P. R. China

4. Ningbo New Materials Testing and Evaluation Center CO., Ltd Ningbo City Zhejiang Province 315201 P. R. China

Abstract

AbstractChiral‐induced spin selectivity is recently demonstrated in a range of spin‐dependent optoelectronics and electrochemistry. Herein, a new type of amorphous chiral tartaric acid‐FeNi coordination polymer fabricated by electrodeposition methods, achieving both high spin‐polarization and high electrocatalytic activity for oxygen evolution, is reported. Circular dichroism shows signature optical activity from the coordination polymer. Conductive atomic force microscopy measurements demonstrate a high spin polarization through the chiral electrocatalyst, which significantly suppresses the formation of hydrogen peroxide byproducts compared to the achiral ones. These chiral Fe‐Ni electrocatalysts exhibit a low overpotential of 205 and 280 mV to achieve 10 and 100 mA cm−2, respectively.

Funder

National Natural Science Foundation of China

Hong Kong University of Science and Technology

Publisher

Wiley

Subject

Electrochemistry,Condensed Matter Physics,Biomaterials,Electronic, Optical and Magnetic Materials

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