skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: NiO as a peculiar support for metal nanoparticles in polyols oxidation

Abstract

The peculiar influence of a NiO support was studied by preparing gold catalysts supported on NiO(1-x) TiO2(x) mixed oxides. PVA protected Au nanoparticles showed high activity when supported on NiO for the selective oxidation of glycerol and ethan-1,2-diol. A detailed characterization of the resulting Au catalysts revealed a preferential deposition of the metal nanoparticles on the NiO phase. However, the activity of Au on NiO(1-x)-TiO2(x) decreased with respect to pure NiO and the selectivity evolved with changes to the support.

Authors:
 [1];  [2];  [3];  [3];  [2];  [4];  [1]
  1. Universita di Milano, Italy
  2. ORNL
  3. EMPA, Laboratory for High Performance Ceramics, Duebendorf, Switzerland
  4. University of Milan and INFN, Milano, Italy
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Shared Research Equipment Collaborative Research Center
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1060253
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Catalysis Science & Technology (RSC); Journal Volume: 3; Journal Issue: 2
Country of Publication:
United States
Language:
English

Citation Formats

Villa, Alberto, Veith, Gabriel M, Ferri, Davide, Weidenkaff, Anke, Perry, Kelly A, Campisi, Sebastiano, and Prati, Laura. NiO as a peculiar support for metal nanoparticles in polyols oxidation. United States: N. p., 2013. Web. doi:10.1039/c2cy20370g.
Villa, Alberto, Veith, Gabriel M, Ferri, Davide, Weidenkaff, Anke, Perry, Kelly A, Campisi, Sebastiano, & Prati, Laura. NiO as a peculiar support for metal nanoparticles in polyols oxidation. United States. doi:10.1039/c2cy20370g.
Villa, Alberto, Veith, Gabriel M, Ferri, Davide, Weidenkaff, Anke, Perry, Kelly A, Campisi, Sebastiano, and Prati, Laura. Tue . "NiO as a peculiar support for metal nanoparticles in polyols oxidation". United States. doi:10.1039/c2cy20370g.
@article{osti_1060253,
title = {NiO as a peculiar support for metal nanoparticles in polyols oxidation},
author = {Villa, Alberto and Veith, Gabriel M and Ferri, Davide and Weidenkaff, Anke and Perry, Kelly A and Campisi, Sebastiano and Prati, Laura},
abstractNote = {The peculiar influence of a NiO support was studied by preparing gold catalysts supported on NiO(1-x) TiO2(x) mixed oxides. PVA protected Au nanoparticles showed high activity when supported on NiO for the selective oxidation of glycerol and ethan-1,2-diol. A detailed characterization of the resulting Au catalysts revealed a preferential deposition of the metal nanoparticles on the NiO phase. However, the activity of Au on NiO(1-x)-TiO2(x) decreased with respect to pure NiO and the selectivity evolved with changes to the support.},
doi = {10.1039/c2cy20370g},
journal = {Catalysis Science & Technology (RSC)},
number = 2,
volume = 3,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 2013},
month = {Tue Jan 01 00:00:00 EST 2013}
}
  • We describe here the use of high-temperature oxidation and reduction to produce highly crystalline nanoparticles of Ni and NiO. Starting with an amorphous Ni powder, we demonstrate that oxidation at 900 C produces faceted NiO nanocrystals with sizes ranging from 20 to 60 nm. High-resolution transmission electron microscopy measurements indicate near-perfect atomic order, truncated by (200) surfaces. Magnetization measurements reveal that the Neel temperature of these NiO nanoparticles is 480 K, substantially reduced by finite-size effects from the bulk value of 523 K. The magnetization of these faceted NiO nanoparticles does not saturate in fields as large as 14 Tmore » while a loop offset is observed which increases from 1000 Oe at 300 K to its maximum value of 3500 Oe at 50 K. We have used high-temperature reduction to transform the faceted NiO nanoparticles into highly ordered Ni nanoparticles, with a Curie temperature of 720 K and blocking temperatures in excess of 350 K. Subsequent efforts to reoxidize these Ni nanoparticles into the core-shell morphology found that the Ni nanoparticles are much more resistant to oxidation than the original Ni powder, perhaps due to the relative crystalline perfection of the former. At 800 C, an unusual surface roughening and subsequent instability was observed, where 50-nm-diameter NiO rods grow from the Ni surfaces. We have demonstrated that high-temperature oxidation and reduction in Ni and NiO are both reversible to some extent and are highly effective for creating the highly crystalline nanomaterials required for applications such as exchange-bias devices.« less
  • Nickel-gold alloy nanoparticles (NPs) are synthesized in solution, by means of a fast butyllithium reduction method, and then used to prepare NiO-stabilized Au NP catalysts through a phase-transformation process. The silica-supported catalysts exhibit a remarkable resistance to sintering and are highly active for CO oxidation.
  • In this communication, we report the synthesis of NiAu alloy nanoparticles (NPs) and their use in preparing Au/NiO CO oxidation catalysts. Because of the large differences in Ni and Au reduction potentials and the immiscibility of the two metals at low temperatures,1, 2 NiAu alloy NP colloids are inherently difficult to prepare by reducing metal salts with common reducing agents. This study describes the first solution-based synthesis of NiAu alloy NPs by way of a fast butyllithium reduction method. By supporting the particles on SiO2 and subsequent conditioning, one obtains a NiO-stabilized Au NP catalyst that exhibits remarkable resistance tomore » sintering and is highly active for CO oxidation. The active NiO-stabilized Au NP catalyst is prepared by in situ phase transformation of NiAu alloy NPs through an Au@Ni core-shell like NP intermediate. In contrast, the corresponding NiO-free Au NPs prepared by an analogous method show negligible low-temperature catalytic activity and a high propensity for coalescence.« less
  • The Ni/NiO{sub x} particles were in situ photodeposited on MIL-101 metal organic frameworks as catalysts for boosting H{sub 2} generation from Erythrosin B dye sensitization under visible-light irradiation. The highest H{sub 2} production rate of 125 μmol h{sup −1} was achieved from the system containing 5 wt. % Ni-loaded MIL-101 (20 mg) and 30 mg Erythrosin B dye. Moreover, the Ni/NiO{sub x} catalysts show excellent stability for long-term photocatalytic reaction. The enhancement on H{sub 2} generation is attributed to the efficient charge transfer from photoexcited dye to the Ni catalyst via MIL-101. Our results demonstrate that the economical Ni/NiO{sub x}more » particles are durable and active catalysts for photocatalytic H{sub 2} generation.« less