期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 166, 期 -, 页码 25-31出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2014.11.009
关键词
Glycerol oxidation; Selectivity; d-Band center; Gold nanoparticle; Graphene
资金
- AcRF Ministry of Education, Singapore [M4011020 RG8/12]
- National Research Foundation, Singapore [2009 NRF-CRP 001-032]
- Singapore National Research Foundation under Campus for Research Excellence And Technological Enterprise (CREATE) programme
Au nanoparticles (NPs) supported on various supports with different metal support interaction are synthesized and tested for glycerol electro-oxidation. Through off-line HPLC analysis, it is found that Au NPs supported on extended poly(4-vinylpyridine) functionalized graphene (Au-P4P/G) shows a much higher activity and much better selectivity for three carbon products than those on carbon black, P4P functionalized reduced graphene oxide (Au-P4P/rGO) and poly(m-aminophenol) (PmAP) wrapped graphene (Au-PmAP/G), e.g., the glyceric acid production reaches 68.6% at 0.2 V (vs. HgO/Hg), and the ratio between three carbon products and other products is 4.92 for Au-P4P/G compared with 0.96 of Au-CB. XPS results indicate that lower d-band center in Au nanoparticles induces higher three carbon selectivity and the changed adsorption ability for oxygen-containing groups might be the main reason. (C) 2014 Elsevier B.V. All rights reserved.
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