TY - JOUR
T1 - Piezoelectric catalysis for efficient reduction of CO2 using lead-free ferroelectric particulates
AU - Phuong, Pham Thi Thuy
AU - Vo, Dai Viet N.
AU - Duy, Nguyen Phuc Hoang
AU - Pearce, Holly
AU - Tsikriteas, Zois Michail
AU - Roake, Eleanor
AU - Bowen, Chris
AU - Khanbareh, Hamideh
N1 - Funding Information:
This research is funded by Vietnam National Foundation for Science and Technology Development ( NAFOSTED ) under grant number 104.05-2019.344 , the Engineering and Physical Sciences Research Council ( EPSRC ), UK, under grant number EP/N509589/1 .
PY - 2022/5/31
Y1 - 2022/5/31
N2 - The increase in global energy demand, together with a rise in carbon dioxide (CO2) levels have encouraged research into the reduction of CO2 into useful chemicals and fuels. In this paper, we demonstrate the piezo-catalytic reduction of CO2 using lead-free lithium-doped potassium sodium niobate (KNN) ferroelectric ceramic particulates. The application of acoustic waves generated by ultrasound to a suspension of the ceramics particles creates pressure waves result in a large change in the spontaneous polarisation of the KNN particles via the piezoelectric effect, which in turn creates surfaces charges for CO2 reduction. The effect of CO2 gas concentration, the presence of dissolved species, and catalyst loading on piezo-catalytic performance are explored. By optimization of the piezo-catalytic effect, a promising piezo-catalytic CO2 reduction rate of 438 μmol g−1 h−1 is achieved, which is much larger than the those obtained from pyro-catalytic effects. This efficient and polarisation tuneable piezo-catalytic route has potential to promote the development of CO2 reduction via the utilisation of vibrational energy for environmental benefit.
AB - The increase in global energy demand, together with a rise in carbon dioxide (CO2) levels have encouraged research into the reduction of CO2 into useful chemicals and fuels. In this paper, we demonstrate the piezo-catalytic reduction of CO2 using lead-free lithium-doped potassium sodium niobate (KNN) ferroelectric ceramic particulates. The application of acoustic waves generated by ultrasound to a suspension of the ceramics particles creates pressure waves result in a large change in the spontaneous polarisation of the KNN particles via the piezoelectric effect, which in turn creates surfaces charges for CO2 reduction. The effect of CO2 gas concentration, the presence of dissolved species, and catalyst loading on piezo-catalytic performance are explored. By optimization of the piezo-catalytic effect, a promising piezo-catalytic CO2 reduction rate of 438 μmol g−1 h−1 is achieved, which is much larger than the those obtained from pyro-catalytic effects. This efficient and polarisation tuneable piezo-catalytic route has potential to promote the development of CO2 reduction via the utilisation of vibrational energy for environmental benefit.
KW - CO reduction
KW - Energy harvesting
KW - Ferroelectric
KW - Piezo-catalysis
KW - Piezoelectric
KW - Potassium sodium niobate
UR - http://www.scopus.com/inward/record.url?scp=85124493047&partnerID=8YFLogxK
U2 - 10.1016/j.nanoen.2022.107032
DO - 10.1016/j.nanoen.2022.107032
M3 - Article
AN - SCOPUS:85124493047
VL - 95
JO - Nano Energy
JF - Nano Energy
SN - 2211-2855
M1 - 107032
ER -