Piezoelectric catalysis for efficient reduction of CO2 using lead-free ferroelectric particulates

Piezocatalytic Techniques in Environmental Remediation

“…One year later, the authors were inspired by the huge influence of Li doping on the piezoelectric and dielectric properties of ceramics based on sodium niobate (KNN) [146] . They realized piezocatalytic CO 2 reduction using lead‐free lithium‐doped potassium sodium niobate (K 0.5 Na 0.5 ) 0.97 Li 0.03 NbO 3 (KNLN) materials (Figure 11d) for the first time [147] . They investigated the effect of the CO 2 gas concentration, dissolved species, and catalyst loading on the piezocatalytic performance of KNLN powders by using a novel experimental setup.…”

“…[146] They realized piezocatalytic CO 2 reduction using lead-free lithium-doped potassium sodium niobate (K 0.5 Na 0.5 ) 0.97 Li 0.03 NbO 3 (KNLN) materials (Figure 11d) for the first time. [147] They investigated the effect of the CO 2 gas concentration, dissolved species, and catalyst loading on the piezocatalytic performance of KNLN powders by using a novel experimental setup. Two possible mechanisms for CO 2 reduction were proposed based on energy band theory and the screening charge effect (Figure 11e).…”

“…f) The piezocatalytic CO production rates obtained at different KNLN loadings. Reproduced from Phuong et al [147] with permission. Copyright 2022, Elsevier.…”

Piezoelectrically Mediated Reactions: From Catalytic Reactions to Organic Transformations

“…[ 6‐8 ] In the past ten years, the concept of “piezocatalysis” was drastically expanded from water splitting reaction to other catalytic reactions. This led to a wide variety of systems in which piezoelectric materials act as catalysts to promote redox reactions of different substances, including organic dyes ( i.e ., acid orange 7 (AO 7 ), [ 9 ] rhodamine (RhB), [ 10‐11 ] and methyl orange (MO) [ 12‐13 ] ) and pollutants ( i.e ., 4‐chlorophenol, [ 14‐15 ] CH 3 SH, [ 16 ] and tetracycline [ 17 ] ), CO 2 , [ 18‐19 ] N 2 , [ 20 ] and O 2 . [ 21‐22 ]…”

Unveiling the Mechanism of Frictional Catalysis in Water by Bi12TiO20: A Charge Transfer and Contaminant Decomposition Path Study

“…Therefore, clean energy, such as solar energy, thermal energy, and mechanical energy, has been extensively studied in the past few years for energy saving and environmental protection. − Among them, mechanical stress can be converted into electrical charges by non-centrosymmetric piezocatalysts that induce reactions of chemical contaminants . In aqueous solution, these charges may react with H 2 O or O 2 to generate reactive oxygen species (ROS) or directly perform in many reactions, including H 2 evolution, − CO 2 reduction, and organic pollutant degradation. − However, piezocatalysis often requires high-frequency ultrasound, which is infrequent in the nature.…”