Oxidation of Pt(111) under Near-Ambient Conditions

被引：155

作者：

Miller, D. J. ^{[1
,2
]}

Oberg, H. ^{[3
]}

Kaya, S. ^{[2
]}

Casalongue, H. Sanchez ^{[2
]}

Friebel, D. ^{[1
,2
]}

Anniyev, T. ^{[1
,2
]}

Ogasawara, H. ^{[2
]}

Bluhm, H. ^{[4
,5
]}

Pettersson, L. G. M. ^{[3
]}

Nilsson, A. ^{[1
,2
,3
]}

机构：

[1] Stanford Inst Mat & Energy Sci, SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA

[2] SLAC Natl Accelerator Lab, Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA 94025 USA

[3] Stockholm Univ, AlbaNova Univ Ctr, Dept Phys, S-10691 Stockholm, Sweden

[4] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA

[5] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 19期

关键词：

ATOMIC OXYGEN; GAS-PHASE; SPECTROSCOPY; SURFACE; OXIDE; KINETICS;

D O I：

10.1103/PhysRevLett.107.195502

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The oxidation of Pt(111) at near-ambient O-2 pressures has been followed in situ using x-ray photoelectron spectroscopy (XPS) and ex situ using x-ray absorption spectroscopy (XAS). Polarization-dependent XAS signatures at the O K edge reveal significant temperature-and pressure-dependent changes of the Pt-O interaction. Oxide growth commences via a PtO-like surface oxide that coexists with chemisorbed oxygen, while an ultrathin alpha-PtO2 trilayer is identified as the precursor to bulk oxidation. These results have important implications for understanding the chemical state of Pt in catalysis.

引用

页数：5

共 35 条

[21] Two-dimensional oxide on Pd(111) [J].

Lundgren, E ;

Kresse, G ;

Klein, C ;

Borg, M ;

Andersen, JN ;

De Santis, M ;

Gauthier, Y ;

Konvicka, C ;

Schmid, M ;

Varga, P .

PHYSICAL REVIEW LETTERS, 2002, 88 (24) :2461031-2461034

[22] Surface oxides on close-packed surfaces of late transition metals [J].

Lundgren, Edvin ;

Mikkelsen, Anders ;

Andersen, Jesper N. ;

Kresse, Georg ;

Schmid, Michael ;

Varga, Peter .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2006, 18 (30) :R481-R499

[23] Low O2 dissociation barrier on Pt(111) due to adsorbate-adsorbate interactions [J].

Miller, D. J. ;

Oberg, H. ;

Naslund, L. -A. ;

Anniyev, T. ;

Ogasawara, H. ;

Pettersson, L. G. M. ;

Nilsson, A. .

JOURNAL OF CHEMICAL PHYSICS, 2010, 133 (22)

[24] Real-space grid implementation of the projector augmented wave method [J].

Mortensen, JJ ;

Hansen, LB ;

Jacobsen, KW .

PHYSICAL REVIEW B, 2005, 71 (03)

[25] A differentially pumped electrostatic lens system for photoemission studies in the millibar range [J].

Ogletree, DF ;

Bluhm, H ;

Lebedev, G ;

Fadley, CS ;

Hussain, Z ;

Salmeron, M .

REVIEW OF SCIENTIFIC INSTRUMENTS, 2002, 73 (11) :3872-3877

[26] STUDY OF HIGH COVERAGES OF ATOMIC OXYGEN ON THE PT(111) SURFACE [J].

PARKER, DH ;

BARTRAM, ME ;

KOEL, BE .

SURFACE SCIENCE, 1989, 217 (03) :489-510

[27] Reaction of atomic oxygen with a Pt(111) surface: chemical and structural determination using XPS, CAICISS and LEED [J].

Parkinson, CR ;

Walker, M ;

McConville, CF .

SURFACE SCIENCE, 2003, 545 (1-2) :19-33

[28]

Perdew JP, 1997, PHYS REV LETT, V78, P1396, DOI 10.1103/PhysRevLett.77.3865

[29] CHARACTERIZATION OF OXIDIZED PLATINUM SURFACES BY X-RAY PHOTOELECTRON-SPECTROSCOPY [J].

PEUCKERT, M ;

BONZEL, HP .

SURFACE SCIENCE, 1984, 145 (01) :239-259

[30] PHYSISORBED, CHEMISORBED AND DISSOCIATED O-2 ON PT(111) STUDIED BY DIFFERENT CORE-LEVEL SPECTROSCOPY METHODS [J].

PUGLIA, C ;

NILSSON, A ;

HERNNAS, B ;

KARIS, O ;

BENNICH, P ;

MARTENSSON, N .

SURFACE SCIENCE, 1995, 342 (1-3) :119-133

← 1 2 3 4 →