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author:

Ni Jun (Ni Jun.) [1] (Scholars:倪军) | Wang Rong (Wang Rong.) [2] (Scholars:王榕) | Lin Jian-Xin (Lin Jian-Xin.) [3] (Scholars:林建新) | Wei Ke-Mei (Wei Ke-Mei.) [4]

Indexed by:

Scopus SCIE PKU CSCD

Abstract:

Citric acid (CA) was used to modify graphitic activated carbon (AC) to improve the ruthenium distribution and the catalytic activity of Ru/AC catalyst. The influence of CA on the texture of AC and Ru/AC, Ru dispersion and catalytic activity were investigated. Transmission electron microscopy (TEM), thermogravimetric analysis (TGA), CO pulse chemisorption and N-2 physisorption indicated that minor amounts of citric acid significantly decreased the surface area of AC and increased the content of oxygen-containing functional groups on the surface of AC. This is the result of preferential adsorption of CA in AC micropores which improves the particle distribution of Ru. The optimal loading sequence is CA followed by RuCl3. A suitable content of CA in Ru/AC catalysts has a remarkable influence on the activities of Ru/AC catalysts at low reaction temperature. The greatest increase of activity was 21.4% for the Ru/AC catalysts treated with CA.

Keyword:

Activity Ammonia synthesis Citric acid Dispersion Ruthenium

Community:

  • [ 1 ] [Ni Jun]Fuzhou Univ, Natl Res Ctr Chem Fertilizer Catalysts, Fuzhou 350002, Peoples R China
  • [ 2 ] [Wang Rong]Fuzhou Univ, Natl Res Ctr Chem Fertilizer Catalysts, Fuzhou 350002, Peoples R China
  • [ 3 ] [Lin Jian-Xin]Fuzhou Univ, Natl Res Ctr Chem Fertilizer Catalysts, Fuzhou 350002, Peoples R China
  • [ 4 ] [Wei Ke-Mei]Fuzhou Univ, Natl Res Ctr Chem Fertilizer Catalysts, Fuzhou 350002, Peoples R China

Reprint 's Address:

  • 魏可镁

    [Wei Ke-Mei]Fuzhou Univ, Natl Res Ctr Chem Fertilizer Catalysts, Fuzhou 350002, Peoples R China

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Source :

ACTA PHYSICO-CHIMICA SINICA

ISSN: 1000-6818

CN: 11-1892/O6

Year: 2009

Issue: 3

Volume: 25

Page: 519-524

0 . 7 1 8

JCR@2009

1 0 . 8 0 0

JCR@2023

ESI Discipline: CHEMISTRY;

JCR Journal Grade:4

CAS Journal Grade:1

Cited Count:

WoS CC Cited Count: 3

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 4

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