Affiliation:
1. College of Materials Science and Engineering Nanjing Tech University 30 South Puzhu Road Nanjing 211816 China
2. Jiangsu Collaborative Innovation Centre for Advanced Inorganic Function Composites Nanjing Tech University Nanjing 211816 China
Abstract
AbstractDirect photocatalytic methane oxidation into value‐added oxygenates under mild conditions enables the sustainable chemical production but suffers from the lack of active photocatalysts and the overoxidation issue. Herein, defective ZnO nanoplates supported AuPd nanoparticles for efficient methane oxidation with O2 as the oxidant at room temperature are reported. A maximum liquid oxygenates productivity of 152.2 mm g−1 h−1 and a selectivity of 86.7%, more than half of which is CH3OH, are achieved over the optimized AuPd/ZnO photocatalyst, resulting in a 16.5% apparent quantum efficiency at 380 nm. The superior photocatalytic performance is benefited from the synergistic effect between defective ZnO substrate and AuPd cocatalyst, wherein the former facilitates CH4 adsorption, and the latter promotes light absorption, charge separation, as well as O2 activation into the reactive oxygen species. This work provides new guidance for regulating the activity and selectivity of the photocatalyst toward methane oxidation.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Jiangsu Province
National College Students Innovation and Entrepreneurship Training Program
Subject
General Materials Science,Renewable Energy, Sustainability and the Environment