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.
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页数：7
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共 32 条
  • [1] Improved catalytic NO oxidation over Pt supported on sulfuric acid treated TiO2
    Bae, Wo Bin
    Park, Jiseok
    Go, You Jin
    Byun, Sang Woo
    Shin, Hyeonwoo
    Kim, Young Jin
    Jang, Jun Hee
    Kang, Sung Bong
    [J]. SEPARATION AND PURIFICATION TECHNOLOGY, 2025, 357
  • [2] Praseodymium doping in ceria-supported palladium nanocatalysts as an effective strategy to minimize the inhibiting effects of water during methane oxidation
    Ballauri, Sabrina
    Sartoretti, Enrico
    Hu, Min
    D'Agostino, Carmine
    Ge, Zijuan
    Wu, Liang
    Novara, Chiara
    Giorgis, Fabrizio
    Piumetti, Marco
    Fino, Debora
    Russo, Nunzio
    Bensaid, Samir
    [J]. APPLIED CATALYSIS B-ENVIRONMENTAL, 2023, 320
  • [3] IR-analysis of H-bonded H2O on the pure TiO2 surface
    Bezrodna, T
    Puchkovska, G
    Shymanovska, V
    Baran, J
    Ratajczak, H
    [J]. JOURNAL OF MOLECULAR STRUCTURE, 2004, 700 (1-3) : 175 - 181
  • [4] Black Tea Waste as Green Adsorbent for Nitrate Removal from Aqueous Solutions
    Bondarev, Andreea
    Popovici, Daniela Roxana
    Calin, Catalina
    Mihai, Sonia
    Sirbu, Elena-Emilia
    Doukeh, Rami
    [J]. MATERIALS, 2023, 16 (12)
  • [5] Combustion of methane on CeO2-ZrO2 based catalysts
    Bozo, C
    Guilhaume, N
    Garbowski, E
    Primet, M
    [J]. CATALYSIS TODAY, 2000, 59 (1-2) : 33 - 45
  • [6] CATALYTIC-OXIDATION OF METHANE OVER PALLADIUM SUPPORTED ON ALUMINA - EFFECT OF AGING UNDER REACTANTS
    BRIOT, P
    PRIMET, M
    [J]. APPLIED CATALYSIS, 1991, 68 (1-2): : 301 - 314
  • [7] Some aspects of hydrocarbon activation on platinum group metal combustion catalysts
    Burch, R
    Loader, PK
    Urbano, FJ
    [J]. CATALYSIS TODAY, 1996, 27 (1-2) : 243 - 248
  • [8] Thermal decomposition of dispersed and bulk-like NOx species in model NOx trap materials
    Chen, XY
    Schwank, J
    Li, J
    Schneider, WF
    Goralski, CT
    Schmitz, PJ
    [J]. APPLIED CATALYSIS B-ENVIRONMENTAL, 2005, 61 (1-2) : 164 - 175
  • [9] Study on pH at the point of zero charge of TiO2 pH ion-sensitive field effect transistor made by the sputtering method
    Chou, JC
    Liao, LP
    [J]. THIN SOLID FILMS, 2005, 476 (01) : 157 - 161
  • [10] Support and water effects on palladium based methane combustion catalysts
    Ciuparu, D
    Pfefferle, L
    [J]. APPLIED CATALYSIS A-GENERAL, 2001, 209 (1-2) : 415 - 428
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