Photocatalytic O2 oxidation of CH4 to CH3OH on AuFe-ZnO bifunctional catalyst

Highly Selectively Methane Photooxidation to CH3OH and HCHO over an Integrated Fe2O3/WO3 Heterojunction Greatly Promoted by Iron(III) Chloride

“…To further monitor the radical-triggered product generation process, the in situ FTIR spectra of the reaction system were recorded in 20 min (Figure c). As presented in Figure c, three strong peaks at 1359, 1441, and 1554 cm –1 were detected in the FTIR spectra, assigned to the CH 3 asymmetric rocking vibration mode, CH 3 scissoring vibration mode, and C–O vibration mode of CH 3 OH, respectively. , The relatively weaker but still recognizable peaks at 1540 and 1379 cm –1 belonged to the CH 2 vibration mode and CH 2 O mode, respectively, , and the peak at around 1681 cm –1 was attributed to the C=O mode . Moreover, the in situ FTIR spectra also showed the C–Cl stretching mode at 790 cm –1 .…”

Photocatalytic conversion of carbon dioxide, methane, and air for green fuels synthesis

“…Ultimately, the reactor was sealed and exposed to a 500 W xenon lamp for one hour. 85 Another recent interesting study was reported by Du et al 86 using AuFe-ZnO as a bifunctional catalyst. The study yielded 1365 μmol g −1 h −1 with high selectivity of CH 3 OH up to 90.7%.…”

“…After the reaction, the mixture was cooled to 10 °C. 86 47,87,88 Catalyst development is a critical area requiring further research and development. Although several catalysts have been reported, they often suffer from low selectivity, stability, or activity.…”

“…After the reaction, the mixture was cooled to 10 °C. 86 Table 4 outlines a comprehensive collection of catalysts investigated and reported in the context of POM reactions.…”

Selective Photocatalytic Oxidation of Methane to Methanol by Constructing a Rapid O2 Conversion Pathway over Au–Pd/ZnO

“…Worth noting is that Au and Pd are effective catalysts for O 2 activation and subsequent oxidation reactions, but it is challenging to accurately regulate the pathway of O 2 evolution using only monometallic catalyst. ,− For example, as an excellent electronic conductor, Au can promote the separation of photogenerated carriers for the O 2 reduction into *OOH and H 2 O 2 , but it has a limited ability to break O–O bond into *O and *OH. − In contrast, Pd exhibits strong adsorption on the O 2 , leading to the effective cleavage of the O–O bond. And *OOH or H 2 O 2 can be easily decomposed into *O and *OH on Pd, but the strong interaction between *O and Pd may result in surface poisoning. ,, Recently, Jiang et al found that the selective formation of ROS could be regulated by adjusting the size of active sites (i.e., single atoms or nanoparticles) on the Au/In 2 O 3 catalyst.…”