Fig. 2: In situ investigation of gaseous intermediates and the role of ZSM-5 zeolite. | Nature Communications

Fig. 2: In situ investigation of gaseous intermediates and the role of ZSM-5 zeolite.

From: Bifunctional zeolites-silver catalyst enabled tandem oxidation of formaldehyde at low temperatures

Fig. 2

a Study of HCHO conversion over ZSM-5 (SiO2/Al2O3 = 46) by SVUV-PIMS at the photon energy of 11.3 eV. b The PIE spectrum of m/z = 60 species in a. c Effect of acid density of ZSM-5 on HCHO conversion. The molar ratios of SiO2/Al2O3 from left to right are 547, 146, 81, 46, and 22, respectively. d Gaseous intermediate generation monitoring by an online quadrupole mass spectrometer. Activities of HCHO conversion to HCOOCH3 (m/z = 60) over ZSM-5 with different densities of acid sites at 60 °C.

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