Self-Enhancement of Water Electrolysis by Electrolyte-Poled Ferroelectric Catalyst

Feng Shuo Li, Yue Wen Fang, Yi Ting Wu, Shu Wei Wu, Sheng Zhu Ho, Chih Yen Chen, Ching Yu Chiang, Yi Chun Chen, Heng Jui Liu

研究成果: Article同行評審


Efficient and durable electrocatalysts with superior activity are needed for the production of green hydrogen with a high yield and low energy consumption. Electrocatalysts based on transition metal oxides hold dominance due to their abundant natural resources, regulable physical properties, and good adaptation to a solution. In numerous oxide catalyst materials, ferroelectrics, possessing semiconducting characteristics and switchable spontaneous polarization, have been considered promising photoelectrodes for solar water splitting. However, few investigations noted their potential as electrocatalysts. In this study, we report an efficient electrocatalytic electrode made of a BiFeO3/nickel foam heterostructure, which displays a smaller overpotential and higher current density than the blank nickel foam electrode. Moreover, when in contact with an alkaline solution, the bond between hydroxyls and the BiFeO3 surface induces a large area of upward self-polarization, lowering the adsorption energy of subsequent adsorbates and facilitating oxygen and hydrogen evolution reaction. Our work demonstrates an infrequent pathway of using functional semiconducting materials for exploiting highly efficient electrocatalytic electrodes.

頁(從 - 到)16274-16286
期刊ACS nano
出版狀態Published - 2023 8月 22

All Science Journal Classification (ASJC) codes

  • 一般材料科學
  • 一般工程
  • 一般物理與天文學


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