School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, P. R. China.
CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, P. R. China.
Chemistry. 2023 Apr 25;29(24):e202204031. doi: 10.1002/chem.202204031. Epub 2023 Mar 17.
Photocatalytic methane oxidation to oxygenates with promising performance remains as a grand challenge due to the low productivity and severe overoxidation. Herein, SrWO /TiO heterojunction was developed for photocatalytic methane oxidation with O to liquid oxygenates ( Please replace "oxygenates" with "oxygenated")products under mild reaction conditions. The optimized SrWO /TiO catalyst exhibited high productivity of 13365 μmol/g with high selectivity of 98.7 % for oxygenates. Benefited from the intimate heterojunction interface of SrWO /TiO , the constructed I-type heterostructure improved the separation and transfer of photogenerated carriers, and a high-speed transfer channel for photogenerated carriers was fabricated. Simultaneously, the special band structure can increase the amount of photogenerated electrons and holes on the TiO surface, which promoted the formation of reactive oxygen species to enhance liquid oxygenates productivity.
由于生产效率低和过度氧化严重，光催化甲烷氧化为含氧物具有良好的性能，但仍是一个巨大的挑战。在此，开发了 SrWO /TiO 异质结，用于在温和的反应条件下光催化甲烷氧化，生成 O 到液体含氧物（请将“oxygenates”替换为“oxygenated”）产物。优化后的 SrWO /TiO 催化剂表现出高的 13365 μmol/g 的生产力和高的 98.7 % 的含氧物选择性。得益于 SrWO /TiO 的紧密异质结界面，所构建的 I 型异质结构提高了光生载流子的分离和转移，并且为光生载流子制造了高速转移通道。同时，特殊的能带结构可以增加 TiO 表面上光生电子和空穴的数量，从而促进活性氧物质的形成，以提高液体含氧物的生产力。
