Promising pyro-photo-electric catalysis in NaNbO3 via integrating solar and cold-hot alternation energy in pyroelectric-assisted photoelectrochemical system

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • Bo Zhang
  • Zhengang Guo
  • Mengnan Ruan
  • Zhifeng Liu

Detail(s)

Original languageEnglish
Article number105485
Journal / PublicationNano Energy
Volume79
Publication statusPublished - Jan 2021

Abstract

Herein, a novel catalytic process named “pyro-photo-electric catalysis” is firstly realized by combining pyroelectric catalysis (PREC) and photoelectrochemical (PEC) catalysis based on NaNbO3 nanocubes. The films show enhanced photocurrent density of 0.37 mA/cm2 at 1.23 V vs. a reversible hydrogen electrode (RHE) under 20–50 °C heating-cooling cycles and illumination, which is 3.1 and 1.6 times higher than that of PREC (0.09 mA/cm2) and PEC catalysis (0.14 mA/cm2). It is found that the higher catalysis efficiency can be the result of increased carrier concentration, including photogenerated carriers and pyro-generated carriers, and accelerated charge separation and transfer due to the change in band alignment at NaNbO3/electrolyte caused by the imbalance of polarization charges and the induced pyroelectric potential. This study confirms the feasibility of pyroelectric-assisted PEC performance and realizes the energy harvesting of cold-hot alternation thermal energy and solar energy. It also provides insights into the rational design for designing new and ecofriendly photoelectrodes with efficient PEC water splitting.

Research Area(s)

  • NaNbO3, Photoelectrochemical, Pyro-photo-electric catalysis, Pyroelectric effect

Citation Format(s)

Promising pyro-photo-electric catalysis in NaNbO3 via integrating solar and cold-hot alternation energy in pyroelectric-assisted photoelectrochemical system. / Zhang, Shaoce; Zhang, Bo; Chen, Dong; Guo, Zhengang; Ruan, Mengnan; Liu, Zhifeng.

In: Nano Energy, Vol. 79, 105485, 01.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal