The effect of size-dependent nanoparticle energetics on catalyst sintering

被引：888

作者：

Campbell, CT ^{[1
]}

Parker, SC ^{[1
]}

Starr, DE ^{[1
]}

机构：

[1] Univ Washington, Dept Chem, Seattle, WA 98195 USA

来源：

SCIENCE | 2002年 / 298卷 / 5594期

关键词：

D O I：

10.1126/science.1075094

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Calorimetric measurements of metal adsorption energies directly provide the energies of metal atoms in supported metal nanoparticles. As the metal coverage increases, the particles grow, revealing the dependence of this energy on particle size, which is found to be much stronger than predicted with the usual Gibbs-Thompson relation. It is shown that this knowledge is crucial to accurately model long-term sintering rates of metal nanoparticles in catalysts.

引用

页码：811 / 814

页数：5

共 35 条

[1] Dependence of formation energies of tin nanoclusters on their size and shape
Bachels, T
Schäfer, R
Güntherodt, HJ
[J]. PHYSICAL REVIEW LETTERS, 2000, 84 (21) : 4890 - 4893
[2] Crossover among structural motifs in transition and noble-metal clusters
Baletto, F
Ferrando, R
Fortunelli, A
Montalenti, F
Mottet, C
[J]. JOURNAL OF CHEMICAL PHYSICS, 2002, 116 (09) : 3856 - 3863
[3] Bartholomew CH, 1997, STUD SURF SCI CATAL, V111, P585
[4] BARTHOLOMEW CH, 1994, STUD SURF SCI CATAL, V88, P1
[5] Absolute surface free energies of Pb
Bombis, C
Emundts, A
Nowicki, M
Bonzel, HP
[J]. SURFACE SCIENCE, 2002, 511 (1-3) : 83 - 96
[6] The kinetics of CO oxidation by adsorbed oxygen on well-defined gold particles on TiO2(110)
Bondzie, VA
Parker, SC
Campbell, CT
[J]. CATALYSIS LETTERS, 1999, 63 (3-4) : 143 - 151
[7] Ultrathin metal films and particles on oxide surfaces: Structural, electronic and chemisorptive properties
Campbell, CT
[J]. SURFACE SCIENCE REPORTS, 1997, 27 (1-3) : 1 - 111
[8] Metal adsorption and adhesion energies on MgO(100)
Campbell, CT
Starr, DE
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2002, 124 (31) : 9212 - 9218
[9] Cosandey F, 2001, SURF REV LETT, V8, P73, DOI 10.1016/S0218-625X(01)00088-4
[10] Fuentes GA, 1997, STUD SURF SCI CATAL, V111, P573

← 1 2 3 4 →