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CHEN KangCheng, et al. Sci China Chem July (2010) Vol.53 No.7
the selective oxidation of glucose. Because Pd catalysts
supported on AC have been extensively applied for fine
chemical syntheses in industry and are normally reduced by
chemicals, such as formaldehyde or even NaBH
4
, the
development of the room temperature plasma reduction will
reduce the use of chemicals, which is a really green
reduction technology and has a great potential for many
other applications.
This work was supported by the National Natural Science Foundation of
China (20990223). The instruments were supplied by ABB Switzerland.
1
2
Wang Z, Yang FH, Yang RT. Enhanced hydrogen spillover on carbon
surfaces modified by oxygen plasma. J Phys Chem C, 2010, 114: 1601–1609
Wang Z, Liu CJ, Zhang GL. Size control of carbon black-supported
platinum nanoparticles via novel plasma reduction. Catal Commun,
2
009, 10: 959–962
3
4
Li Y, Yang RT, Liu CJ, Wang Z. Hydrogen storage on carbon doped
with platinum nanoparticles using plasma reduction. Ind Eng Chem
Res, 2007, 46: 8277–8281
Wang LF, Yang RT. Hydrogen storage properties of carbons doped
with ruthenium, platinum, and nickel nanoparticles. J Phys Chem C,
2
008, 112: 12486–12494
5
6
7
Dimitratos N, Lopez-Sanchez JA, Hutchings GJ. Green catalysis with
alternative feedstocks. Top Catal, 2009, 52: 258–268
Arcadi A. Alternative synthetic through new develoments in catalysis
by gold. Chem Rev, 2008, 108: 3266–3325
Onda A, Ochi T, Kajiyoshi K, Yanagisawa K. A new chemical
process for catalytic conversion of D-glucose into lactic acid and
gluconic acid. Appl Catal A, 2008, 343: 49–54
Figure 4 Size distribution histograms of the catalysts.
8
9
0
Zhu JJ, Figueiredo JL, Faria JL. Au/activated-carbon catalysts for
selective oxidation of alcohols with molecular oxygen under atmospheric
pressure: Role of basicity. Cata Commun, 2008, 9: 2395–2397
Zhou Y, Wang S, Ding B, Yang Z. Preparation of onion-like
Pd-Bi-Au/C trimetallic catalyst and their application. J Sol-Gel Sci
Technol, 2008, 47: 182–186
Sievers C, Musin I, Marzialetti T, Olarte MBV, Agrawal PK, Jones
CW. Acid-Catalyzed conversion of sugars and furfurals in an
ionic-liquid phase. ChemSusChem, 2009, 2: 665–671
1
1
1
Gogova Z, Hanika J. Reactivation of a palladium catalyst during glucose
oxidation by molecular oxygen. Chem Papers, 2009, 63: 520–526
Yin HM, Zhou CQ, Xu CX, Liu PP, Xu XH, Ding Y. Aerobic
oxidation of D-glucose on support-free nanoporous gold. J Phys
Chem C, 2008, 112: 9673–9678
1
2
Figure 5 Activity tests of the catalysts.
13 Liang X, Liu CJ, Kuai P. Selective oxidation of glucose to gluconic acid
over argon plasma reduced Pd/Al
. Green Chem, 2008, 10: 1318–1322
2 3
O
1
4
Lu J, Do I, Drzal LT, Worden RM, Lee I. Nanometal-decorated
exfoliated graphite nanoplatelet based glucose biosensors with high
sensitivity and fast response. ACS Nano, 2008, 2: 1825–1832
Table 4 Conversion at the time and average selectivity for the catalysts
Conversion Conversion Conversion
Average
selectivity
88.05%
87.40%
76.40%
Catalysts
in 1 h
in 2 h
in 3 h
73.00%
76.00%
100%
15 Mirescu A, Berndt H, Martin A, Prusse U. Long-term stability of a
.45% Au/TiO catalyst in the selective oxidation of glucose at
0
2
Pd/AC-F
Pd/AC-H
Pd/AC-P
31.75%
39.50%
92.25%
55.75%
61.00%
99.50%
optimised reaction conditions. Appl Catal A, 2007, 317: 204–209
Ishida T, Kinoshita N, Okatsu H, Akita T, Takei T, Haruta M. Influence
of the support and the size of gold clusters on catalytic activity for
glucose oxidation. Angew Chem Int Ed, 2008, 47: 9265–9268
Onal Y, Schimpf S, Claus P. Structure sensitivity and kinetics of
D-glucose oxidation to D-gluconic acid over carbon-supported gold
catalysts. J Catal, 2004, 223: 122–133
Liang X, Wang ZJ, Liu CJ. size-controlled synthesis of colloidal gold
nanoparticles at room temperature under the influence of glow
discharge. Nanoscale Res Lett, 2010, 5: 124–129
1
6
1
1
7
8
4
Conclusions
The present work confirms that the glow discharge plasma
could reduce the AC supported Pd catalysts. Compared to
the catalysts reduced by hydrogen at elevated temperature
and by formaldehyde, the plasma reduced Pd catalyst shows
the smallest size with a narrow size distribution. This plasma
reduced catalyst possesses the highest catalytic activity for
19 Tang S, Lu N, Wang JK, Ryu SK, Choi HS. Novel effects of surface
modification on activated carbon fibers using a low pressure plasma
treatment. J Phys Chem C, 2007, 111: 1820–1829
2
0
Lee D, Hong SH, Paek KH, Ju WT. Adsorbability enhancement of
activated carbon by dielectric barrier discharge plasma treatment.
Surf Coat Technol, 2005, 200: 2277–2282