Advertisement

Catalysis Letters

, Volume 149, Issue 8, pp 2098–2103 | Cite as

Pd-based Catalysts by Colloid Synthesis Using Different Reducing Reagents for Complete Oxidation of Methane

  • Pengfei Qu
  • Wei Hu
  • Yang Wu
  • Jianjun Chen
  • Yaoqiang ChenEmail author
  • Lin ZhongEmail author
Article
  • 82 Downloads

Abstract

Here, without using any organic stabilizer, via two-steps process, Pd-based catalysts supported on La-modified Al2O3 by a new colloid synthesis method using different reducing reagents were prepared. It was found that the reducibility and structure of reducer controlled the rate of nucleation and growth of Pd in its precursor solution supported on the modified Al2O3. The surface OH groups of alumina can stabilize the formed Pd nanoparticles and enhance Pd dispersion. The catalyst obtained by using the mild reducing reagent, ethylene glycol, had the highest dispersion (32.6%) and largest active metal surface area. This catalyst showed the best catalytic performance among the five as-synthesized catalysts for removing pollutants in a simulated natural gas vehicles (NGVs) exhaust. Compare to its counterpart by common impregnation method, the light-off temperature over the catalyst by colloid synthesis method can be significantly decreased by 39 °C for CH4 and 27 °C for NO, respectively. The study may provide a general method to control the formation of metal (oxide) nanoparticles for heterogeneous catalysis, especially for emission abatement of NGVs.

Graphical Abstract

Keywords

Palladium nanoparticles Colloid synthesis Exhaust purification Reducing agent 

Notes

Acknowledgements

We gratefully acknowledge the National Natural Science Foundation of China (Grant No. 21673146).

References

  1. 1.
    Yeh S (2007) An empirical analysis on the adoption of alternative fuel vehicles: the case of natural gas vehicles. Energy Policy 35:5865–5875CrossRefGoogle Scholar
  2. 2.
    Hutter R et al (2018) Catalytic methane oxidation in the exhaust gas aftertreatment of a lean-burn natural gas engine. Chem Eng J 349:156–167CrossRefGoogle Scholar
  3. 3.
    Akansu S (2004) Internal combustion engines fueled by natural gas-hydrogen mixtures. Int J Hydrog Energy 29:1527–1539CrossRefGoogle Scholar
  4. 4.
    Huang F et al (2017) Pd or PdO: catalytic active site of methane oxidation operated close to stoichiometric air-to-fuel for natural gas vehicles. Appl Catal B 219:73–81CrossRefGoogle Scholar
  5. 5.
    Gélin P, Primet M (2002) Complete oxidation of methane at low temperature over noble metal based catalysts: a review. Appl Catal B 39:1–37CrossRefGoogle Scholar
  6. 6.
    Hicks RF, Qi H, Young ML, Lee RG (1990) Structure sensitivity of methane oxidation over platinum and palladium. J Catal 122(2):280–294CrossRefGoogle Scholar
  7. 7.
    Amairia C et al (2011) Study of the effect of the preparation route and the palladium precursor on the methane oxidation behavior over Al2O3–ZrO2 supported palladium. React Kinet Mech Catal 103(2):379–389CrossRefGoogle Scholar
  8. 8.
    Goodman ED et al (2017) Mechanistic understanding and the rational design of sinter-resistant heterogeneous catalysts. ACS Catal 7:7156–7173CrossRefGoogle Scholar
  9. 9.
    Willis JJ et al (2017) Systematic structure–property relationship studies in palladium-catalyzed methane complete combustion. ACS Catal 7:7810–7821CrossRefGoogle Scholar
  10. 10.
    Aijaz A et al (2012) Immobilizing highly catalytically active Pt nanoparticles inside the pores of metal-organic framework: a double solvents approach. J Am Chem Soc 134:13926–13929CrossRefGoogle Scholar
  11. 11.
    Narui K et al (1999) Effects of addition of Pt to Pd/Al2O3 catalyst on catalytic activity for methane combustion and TEM observations of supported particles. Appl Catal A 179:165–173CrossRefGoogle Scholar
  12. 12.
    Mao X et al (2019) A Study of support effects for CH4 and CO oxidation over Pd catalysts on ALD-modified Al2O3. Catal Lett 149:6095Google Scholar
  13. 13.
    Wang B et al (2013) Catalytic combustion of lean methane at low temperature over palladium on a CoOx–SiO2 composite support. Catal Lett 143(5):411–417CrossRefGoogle Scholar
  14. 14.
    Persson K et al (2007) Characterisation and microstructure of Pd and bimetallic Pd–Pt catalysts during methane oxidation. J Catal 245:401–414CrossRefGoogle Scholar
  15. 15.
    Li Y et al (2002) Size effects of PVP–Pd nanoparticles on the catalytic Suzuki reactions in aqueous solution. Langmuir 18:4921–4925CrossRefGoogle Scholar
  16. 16.
    Agarwal N et al (2017) Aqueous Au-Pd colloids catalyze selective CH4 oxidation to CH3OH with O2 under mild conditions. Science 358:223–227CrossRefGoogle Scholar
  17. 17.
    Saldan I et al (2015) Chemical synthesis and application of palladium nanoparticles. J Mater Sci 50:2337–2354CrossRefGoogle Scholar
  18. 18.
    Quiros I et al (2002) Preparation of alkanethiolate-protected palladium nanoparticles and their size dependence on synthetic conditions. Langmuir 18:1413–1418CrossRefGoogle Scholar
  19. 19.
    Hu W et al (2018) Enhanced catalytic performance of a Pd catalyst prepared via a two-step method of in situ reduction-oxidation. Chem Commun 53:6160–6163CrossRefGoogle Scholar
  20. 20.
    Xiong H et al (2017) Metastable Pd ↔ PdO structures during high temperature methane oxidation. Catal Lett 147(5):1095–1103CrossRefGoogle Scholar
  21. 21.
    Wu Y et al (2018) Effect of MOx (M = Ce, Ni, Co, Mg) on activity and hydrothermal stability of Pd supported on ZrO2–Al2O3 composite for methane lean combustion. J Taiwan Inst Chem Eng 85:176–185CrossRefGoogle Scholar
  22. 22.
    Xu X, Liu X (2017) Synthesis of colloidal precious metals nanoparticles with controlled size and morphology. US Patent 20170304805,A1, 26 Oct 2017Google Scholar
  23. 23.
    Auer S, Frenkel D (2001) Prediction of absolute crystal-nucleation rate in hard-sphere colloids. Nature 409:1020–2023CrossRefGoogle Scholar
  24. 24.
    Langille MR et al (2012) Stepwise evolution of spherical seeds into 20-fold twinned icosahedra. Science 337:954–957CrossRefGoogle Scholar
  25. 25.
    Wang D, Li Y (2011) Bimetallic nanocrystals: liquid-phase synthesis and catalytic applications. Adv Mater 23:1044–1060CrossRefGoogle Scholar
  26. 26.
    van Dillen AJ et al (2003) Synthesis of supported catalysts by impregnation and drying using aqueous chelated metal complexes. J Catal 216:257–264CrossRefGoogle Scholar
  27. 27.
    Shevchenko EV et al (2003) Study of nucleation and growth in the organometallic synthesis of magnetic alloy nanocrystals: the role of nucleation rate in size control of CoPt3 nanocrystals. J Am Chem Soc 125:9090–9101CrossRefGoogle Scholar
  28. 28.
    Gremminger AT et al (2015) Influence of gas composition on activity and durability of bimetallic Pd-Pt/Al2O3 catalysts for total oxidation of methane. Catal Today 258:470–480CrossRefGoogle Scholar
  29. 29.
    Simplício LMT et al (2006) Methane combustion over PdO-alumina catalysts: the effect of palladium precursors. Appl Catal B 63:9–14CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Chemical EngineeringSichuan UniversityChengduPeople’s Republic of China
  2. 2.College of Chemistry and Chemical EngineeringChina West Normal UniversityNanchongPeople’s Republic of China
  3. 3.Institute of New Energy and Low-Carbon TechnologySichuan UniversityChengduPeople’s Republic of China
  4. 4.College of ChemistrySichuan UniversityChengduPeople’s Republic of China

Personalised recommendations