Engineering Polarization in the Ferroelectric Electrocatalysts to Boost Water Electrolysis

Xiaoning Li; Yumeng Du; Liangbing GeChongyan HaoYing BaiZhengping FuYalin LuZhenxiang Cheng

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Engineering Polarization in the Ferroelectric Electrocatalysts to Boost Water Electrolysis

机译：Engineering Polarization in the Ferroelectric Electrocatalysts to Boost Water Electrolysis

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Water splitting is the most important process for making green hydrogen.The positive effects of ferroelectric polarization in various kinds of watersplitting are well recognized, but the study of electrocatalytic water splittingis still in its infancy. Herein, a family of intrinsic ferroelectrics with a flexibletetragonal tungsten bronze structure is chosen to accommodate oxygenevolution reaction (OER) active sites together with its freedom for tuning theferroelectric polarization. It is found that the OER performance is positivelycorrelated with the ferroelectric polarization, with a significant reduction inthe overpotential of ≈40 mV at 10 mA cm~(?2), coming from two trade-off effects,i.e., enhancement of the surface adsorption and band tilting for fast electrontransfer. This study not only fills the gap between electrocatalytic water splittingand the band structure but also proposes ferroelectric polarization as apowerful tool to enhance water splitting for clean hydrogen in several ways.

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《Advanced functional materials》 |2023年第6期|2210194.1-2210194.9|共9页
作者
Xiaoning Li; Yumeng Du; Liangbing GeChongyan HaoYing BaiZhengping FuYalin LuZhenxiang Cheng;
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作者单位

Institute for Superconducting & Electronic Materials (ISEM) Australian Institute for Innovative Materials, Innovation Campus University of Wollongong Squires Way, North Wollongong, NSW 2500, Australia;

Department of Materials Science and Engineering University of Science and Technology of China Hefei 230026, P. R. China;

International Joint Research Laboratory of New Energy Materials and Devices of Henan Province School of Physics and Electronics Henan University Kaifeng 475004, P. R. China;

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正文语种英语
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band structures; ferroelectricity; metallic states; polarization; tetragonal tungsten bronze; water electrolysis;

Engineering Polarization in the Ferroelectric Electrocatalysts to Boost Water Electrolysis

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