Positron annihilation studies in silica supported nickel carbonate systems

被引：10

作者：

Babu, GP

Manohar, V

Sudarshan, K

Pujari, PK

Manohar, SB

Goswami, A ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, Radiochem Div, Bombay 400085, Maharashtra, India

[2] Hindustan Lever Res Ctr, Mumbai 400099, India

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2002年 / 106卷 / 27期

关键词：

D O I：

10.1021/jp014099n

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A number of silica supported nickel carbonate systems were studied by positron annihilation lifetime spectroscopy (PAS) and nitrogen gas adsorption method (BET) to evaluate the pore size distribution in the samples. Results show that the long-lived o-Ps component gives a pore size much smaller than the average pore radius obtained from BET analysis. This indicates that o-Ps represents the pores of smaller size in a sample with wide pore size distribution.

引用

收藏

页码：6902 / 6906

页数：5

相关论文

共 31 条

[1] CHARACTERIZATION OF SILICA SUPPORTED NI AND MG BASIC CARBONATE CATALYST PRECURSORS [J].

BABU, GP ;

GHUGE, KD ;

RAMMOHAN, SV ;

KRISHNAN, V ;

BHAT, AN .

CATALYSIS LETTERS, 1992, 15 (1-2) :95-103

[2] THE STOICHIOMETRY OF HYDROGEN AND CARBON-MONOXIDE CHEMISORPTION ON ALUMINA-SUPPORTED AND SILICA-SUPPORTED NICKEL [J].

BARTHOLOMEW, CH ;

PANNELL, RB .

JOURNAL OF CATALYSIS, 1980, 65 (02) :390-401

[3] SUPPORT AND CRYSTALLITE SIZE EFFECTS IN CO HYDROGENATION ON NICKEL [J].

BARTHOLOMEW, CH ;

PANNELL, RB ;

BUTLER, JL .

JOURNAL OF CATALYSIS, 1980, 65 (02) :335-347

[4] PASCA analysis of Pt-mordenite-Al2O3 catalysts [J].

Bradley, SA ;

Luo, X ;

He, J ;

Chao, TH ;

Gillespie, RD .

CATALYSIS LETTERS, 1997, 47 (3-4) :205-211

[5] STUDY OF THE SURFACE-PROPERTIES OF ZEOLITE USING POSITRON-ANNIHILATION TECHNIQUE [J].

CHEN, ZQ ;

MA, L ;

WANG, SJ .

PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 1995, 147 (01) :187-193

[6] Positronium lifetimes is porous Vycor glass [J].

Ciesielski, K ;

Dawidowicz, AL ;

Goworek, T ;

Jasinska, B ;

Wawryszczuk, J .

CHEMICAL PHYSICS LETTERS, 1998, 289 (1-2) :41-45

[7]

COLEMAN PG, 1982, POSITRON ANNIHILATIO

[8] LI-DOPED MGO AS CATALYSTS FOR OXIDATIVE COUPLING OF METHANE - A POSITRON-ANNIHILATION STUDY [J].

DAI, GH ;

YAN, QJ ;

WANG, Y ;

LIU, QS .

CHEMICAL PHYSICS, 1991, 155 (02) :275-284

[9] Determination of pore size in mesoporous thin films from the annihilation lifetime of positronium [J].

Dull, TL ;

Frieze, WE ;

Gidley, DW ;

Sun, JN ;

Yee, AF .

JOURNAL OF PHYSICAL CHEMISTRY B, 2001, 105 (20) :4657-4662

[10] THE TEMPERATURE-DEPENDENCE OF POSITRON LIFETIMES IN SOLID PIVALIC ACID [J].

ELDRUP, M ;

LIGHTBODY, D ;

SHERWOOD, JN .

CHEMICAL PHYSICS, 1981, 63 (1-2) :51-58

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