Affiliation:
1. Institute of Clean Energy Chemistry Key Laboratory for Green Synthesis and Preparative Chemistry of Adv. Mater. College of Chemistry Liaoning University Shenyang 110036 P. R. China
2. College of Chemical Engineering Shenyang University of Chemical Technology Shenyang 110142 P. R. China
3. Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral Materials School of Materials Science and Technology China University of Geosciences Beijing 100083 China
4. School of Science RMIT University Melbourne Victoria 3000 Australia
Abstract
AbstractMechanical energy driven piezocatalytic hydrogen (H2) production is a promising way to solve the energy crisis . But limited by the slow separation and transfer efficiency of piezoelectric charges generated on the surface of piezocatalysts , the piezocatalytic performance is still not satisfactory. Here, defect engineering is first used to optimize the piezocatalytic performance of microcrystalline cellulose (MCC). The piezocatalytic H2 production rate of MCC with the optimal defect concentration can reach up to 84.47 µmol g−1 h−1 under ultrasonic vibration without any co‐catalyst, which is ≈3.74 times higher than that of the pure MCC (22.65 µmol g−1 h−1). The enhanced H2 production rate by piezoelectric catalysis is mainly due to the introduction of defect engineering on MCC, which disorders the symmetry of MCC crystal structure, improves the electrical conductivity of the material, and accelerates the separation and transfer efficiency of piezoelectric charges. Moreover, the piezocatalytic H2 production rate of MCC with the optimal defect concentration can still reach up to 93.61 µmol g−1 h−1 in natural seawater, showingits commendable practicability. This study presents a novel view for designing marvelous‐performance biomass piezocatalysts through defect engineering, which can efficiently convert mechanical energy into chemical energy .
Funder
National Natural Science Foundation of China
Australian Government
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry