Improvement of Catalytic Methane Oxidation by Nitric Acid Treatment on Pt/TiO2

被引：0

作者：

Park, Jiseok ^{[1
]}

Bae, Wo Bin ^{[2
]}

Byun, Sang Woo ^{[1
]}

Shin, Hyeonwoo ^{[1
]}

Min, Haehyun ^{[3
]}

Kim, Young Jin ^{[4
]}

Kang, Sung Bong ^{[1
]}

机构：

[1] Gwangju Inst Sci & Technol, Sch Environm & Energy Engn, Res Ctr Innovat Energy & Carbon Optimized Synth Ch, Gwangju 61005, South Korea

[2] Rowan Univ, Dept Chem Engn, Glassboro, NJ 08028 USA

[3] SUNY Coll Environm Sci & Forestry, Dept Chem Engn, Syracuse, NY 13210 USA

[4] Kyungpook Natl Univ, Dept Environm Engn, 80 Daehak Ro, Daegu 41566, South Korea

来源：

ADVANCED ENERGY AND SUSTAINABILITY RESEARCH | 2025年

基金：

新加坡国家研究基金会;

关键词：

CH4; oxidations; dispersion and phase; nitric acid treatments; Pt/TiO2; surface acidity; COMBUSTION ACTIVITY; PLATINUM; TIO2; WATER; IR; HYDROGEN; CHARGE; SCR;

D O I：

10.1002/aesr.202400358

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This study investigates the effect of nitric acid (Pt:NA) treatment on the catalytic performance of Pt/TiO2 catalysts in methane oxidation. By varying the molar ratio of Pt to nitric acid (NA) from 1:0.1 to 1:10 of Pt:NA, a series of Pt/NA-TiO2 catalysts are synthesized. The structural and catalytic properties are identified using X-Ray photoelectron spectroscopy, transmission electron microscopy, and diffuse reflectance infrared Fourier transform spectroscopy. The NA treatment during the catalyst synthesis promotes the formation of acidic sites, enhancing the uniform adsorption of the Pt precursor, which in turn improves Pt dispersion and catalytic activity. However, excessive NA treatment above Pt:NA ratio of 1:5 induces the formation of larger Pt particles due to competitive nitrate adsorption, leading to decreased Pt dispersion and diminished catalytic performance. These findings provide a simple method for synthesizing active Pt supported on TiO2 catalysts with NA treatment having well-dispersed Pt particles, thereby maximizing the catalytic activity of the methane oxidation.

引用

页数：7

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