Evaluation of stability of silica-supported Fe-Pd and Fe-Pt nanoparticles in aerobic conditions using thermal analysis

被引：25

作者：

Kirichenko, Olga ^{[1
]}

Kapustin, Gennadiy ^{[1
]}

Nissenbaum, Vera ^{[1
]}

Mishin, Igor ^{[1
]}

Kustov, Leonid ^{[1
]}

机构：

[1] Russian Acad Sci, ND Zelinsky Inst Organ Chem, Moscow 119991, Russia

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2014年 / 118卷 / 02期

关键词：

TPR analysis; Fe-Pd; Fe-Pt; Supported metal nanoparticles; ZERO-VALENT IRON; TEMPERATURE-PROGRAMMED REDUCTION; BIMETALLIC CATALYSTS; CARBON; HYDRODECHLORINATION; DECHLORINATION; REACTIVITY; PARTICLES; OXIDATION; EVOLUTION;

D O I：

10.1007/s10973-014-3763-x

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The applications of zerovalent iron nanoparticles (nZVI) exploit their high reactivity which decreases due to oxidation in aerobic conditions during manufacture, application, and storage. In this study, we present the new procedure for estimation of the nZVI stability to oxidation in air. The procedure is suitable for characterization of the novel materials based on the supported nZVI. Nanoscale particles were synthesized inside porous silica supports by incipient wetness impregnation with the metal precursor solutions followed by thermal treatment. The TG-DTA studies revealed the decomposition temperature of the supported precursors, as well as the interaction of Fe and precious metal precursors, which resulted in the formation of alloy nanoparticles. Characterization of the samples by XRD confirmed the formation of the nanoparticles of the metallic Pd, Pt, and Fe phases supported on SiO2 carriers, as well as the formation of solid solutions based on the structure of precious metals. The new procedure for estimation of the nZVI stability included (1) TPR with hydrogen up to 400-425 A degrees C followed by isothermal reduction at these temperatures; (2) in situ reoxidation with oxygen at room temperature. The samples were reduced "as obtained" and after in situ reoxidation. The results of the TPR studies exhibited that introduction of both Pd and Pt protected the Fe nanoparticles from oxidation with oxygen and air at ambient conditions.

引用

页码：749 / 758

页数：10

共 28 条

[11] Thermal analysis of ammonium trioxalatometallate complexes supported on titania and reducibility of their decomposition products [J].

Kirichenko, O. A. ;

Nissenbaum, V. D. ;

Kapustin, G. I. ;

Kustov, L. M. .

THERMOCHIMICA ACTA, 2009, 494 (1-2) :35-39

[12] Zero-valent iron nanoparticles for abatement of environmental pollutants: Materials and engineering aspects [J].

Li, Xiao-qin ;

Elliott, Daniel W. ;

Zhang, Wei-xian .

CRITICAL REVIEWS IN SOLID STATE AND MATERIALS SCIENCES, 2006, 31 (04) :111-122

[13]

LIETZ G, 1988, APPL CATAL, V45, P71

[14] Structure and activity of microwave irradiated silica supported Pd-Fe bimetallic catalysts in the hydrodechlorination of chlorobenzene [J].

Lingaiah, N ;

Prasad, PSS ;

Rao, PK ;

Berry, FJ ;

Smart, LE .

CATALYSIS COMMUNICATIONS, 2002, 3 (09) :391-397

[15] Trichloroethene hydrodechlorination in water by highly disordered monometallic nanoiron [J].

Liu, YQ ;

Choi, H ;

Dionysiou, D ;

Lowry, GV .

CHEMISTRY OF MATERIALS, 2005, 17 (21) :5315-5322

[16] Effect of particle age (Feo content) and solution pH on NZVI reactivity:: H2 evolution and TCE dechlorination [J].

Liu, Yueqiang ;

Lowry, Gregory V. .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2006, 40 (19) :6085-6090

[17] The oxidation kinetics study of ultrafine iron powders by thermogravimetric analysis [J].

Lysenko, E. N. ;

Surzhikov, A. P. ;

Zhuravkov, S. P. ;

Vlasov, V. A. ;

Pustovalov, A. V. ;

Yavorovsky, N. A. .

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2014, 115 (02) :1447-1452

[18] Re-examination of phase diagram of Fe-Pt system [J].

Nosé, Y ;

Kushida, A ;

Ikeda, T ;

Nakajima, H ;

Tanaka, K ;

Numakura, H .

MATERIALS TRANSACTIONS, 2003, 44 (12) :2723-2731

[19] Characterization and properties of metallic iron nanoparticles: Spectroscopy, electrochemistry, and kinetics [J].

Nurmi, JT ;

Tratnyek, PG ;

Sarathy, V ;

Baer, DR ;

Amonette, JE ;

Pecher, K ;

Wang, CM ;

Linehan, JC ;

Matson, DW ;

Penn, RL ;

Driessen, MD .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2005, 39 (05) :1221-1230

[20]

Okamoto H., 1993, Phase Diagrams of Binary Iron Alloys, Fe-Pd (Iron-Palladium), P319

← 1 2 3 →