One-pot synthesis of uniform mesoporous rhodium oxide/alumina hybrid as high sensitivity and low power consumption methane catalytic combustion micro-sensor

Ultrasensitive detection of trimethylamine using Rh-doped SnO2 hollow spheres prepared by ultrasonic spray pyrolysis

“…A strong 3d 5/2 peak appeared at 309.4 eV in the Rh-SnO 2 specimen (Fig. 7b), which accords with of the results seen for Rh 2 O 3 [29] and the report [30] regarding the formation of Rh 2 O 3 after heat treatment at 500 • C in air atmosphere. The binding energy of the Sn 3d 5/2 peak in Rh-SnO 2 (486.42 eV) was 0.3 eV lower than that in pure SnO 2 (486.68 eV) (Fig.…”

Selective CO Methanation Over Ru Supported on Carbon Spheres: The Effect of Carbon Functionalization on the Reverse Water Gas Shift Reaction

“…Mesoporous supports tend to provide easy accessibility to the dispersed active metal species [17]. High dispersions have been reported when nickel or noble metal nanoparticles are loaded into an aluminum oxide framework via in situ metal ion incorporation [1,[18][19][20][21]. The active centers tend to be isolated from each other and this enhances their catalyst sinter resistance [18].…”

Mesoporous PdO/Pt/Al2O3 film produced by reverse-micro-emulsion and its application for methane micro-sensor

“…However, the MEMS sensor with noble metal/Al ¼ 1/2 has a high enough response signal of 10.1 mV for methane detection when compared with that using Rh 2 O 3 as catalyst (6 mV). 19 Thus, this mole ratio was selected for further investigation aer considering the synthesis from the perspective of cost and intensity of signal output. Due to the porous catalyst structure and high content of noble metal, only about 1% of the heating area reaches 25% signal output as compared with traditional methane catalytic combustion sensors.…”

“…In previous studies, we have reported that rhodium oxide can be formed into a uniform mesoporous hybrid with Al 2 O 3 in a large mole ratio range when P123 was used as template, and this hybrid can be easily deposed onto a micro-heater for methane detection. 18,19 Unfortunately, this protocol is only effective for the rhodium system. 18 The fabrication of such a mesoporous lm with high content of catalyst and controlled porosity by a simple and exible method is still a challenge.…”