The reduction of CO2into useful hydrocarbon chemicals has attracted significant attention in light of the depletion in fossil resources and the global demand for sustainable sources of energy. In this paper, we demonstrate piezo-catalytic electrochemical reduction of CO2by exploiting low Curie temperature,Tc∼ 38 °C, Nb-doped lead zirconate titanate (PZTN) piezoelectric particulates. The large change in spontaneous polarisation of PZTN due to the acoustic pressures from to the application of ultrasound in the vicinity of theTccreates free charges for CO2reduction. The effect of applied acoustic power, particulate agglomeration and the impact ofTcon piezo-catalytic performance are explored. By optimization of the piezo-catalytic effect a promising piezo-catalytic CO2reduction rate of 789 μmol g−1h−1is achieved, which is much larger than the those obtained from pyro-catalytic effects. This efficient and polarisation tunable piezo-catalytic route has potential to promote the development of CO2reductionviathe utilization of vibrational energy for environmental improvement.
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Materials Science(all)