Orientation and morphology of Pt nanoparticles in γ-alumina processed via ion implantation and thermal annealing

被引：12
作者：
Clauser, Arielle L. [1 ]
Giulian, Raquel [2 ]
McClure, Zachary D. [3 ,5 ,6 ]
Sarfo, Kofi Oware [3 ]
Ophus, Colin [4 ]
Ciston, Jim [4 ]
Arnadottir, Liney [3 ]
Santala, Melissa K. [1 ]
机构：
[1] Oregon State Univ, Sch Mech Ind & Mfg Engn, 204 Rogers Hall, Corvallis, OR 97331 USA
[2] Univ Fed Rio Grande do Sul, Inst Phys, Porto Alegre, RS, Brazil
[3] Oregon State Univ, Sch Chem Biol & Environm Engn, Corvallis, OR 97331 USA
[4] Lawrence Berkeley Natl Lab, Mol Foundry, Natl Ctr Electron Microscopy, Berkeley, CA USA
[5] Purdue Univ, Sch Mat Engn, W Lafayette, IN 47907 USA
[6] Purdue Univ, Birck Nanotechnol Ctr, W Lafayette, IN 47907 USA
来源：
SCRIPTA MATERIALIA | 2020年 / 188卷
基金：
美国国家科学基金会;
关键词：
Crystalline oxides; Platinum; Interfaces; Nanoparticle morphology; Transmission electron microscopy; SIZE; TRANSFORMATION; POLYMORPHS; EVOLUTION; PLATINUM; SURFACES; AL2O3;
D O I：
10.1016/j.scriptamat.2020.06.058
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Structure and chemistry of metal/metal-oxide interfaces are critical for many catalytic processes and sensing. Pristine interfaces of Pt and gamma-Al2O3 were fabricated using high-energy ion implantation and thermal processing. Amorphous regions of alumina develop in single crystal alpha-alumina during Pt+ implantation and an 800 degrees C thermal treatment crystalizes amorphized alumina to gamma-Al2O3 and allows Pt ions to precipitate within the developing gamma-alumina, yielding Pt nanoparticle tetrahedra terminated by {111} surfaces. The phase of alumina that developed and the distribution, morphology, and orientation of Pt nanoparticles was determined using x-ray diffraction, Rutherford backscattering spectrometry, transmission electron microscopy and scanning transmission electron microscopy. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：44 / 49
页数：6
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