TY - JOUR
T1 - A New One-Pot Sequential Reduction-Deposition Method for the synthesis of Silica-supported NiPt and CuPt Bimetallic Catalysts
AU - Vargheese, Vibin
AU - Ghampson, I. Tyrone
AU - Yun, Gwang Nam
AU - Kobayashi, Yasukazu
AU - Takagaki, Atsushi
AU - Ted Oyama, S.
N1 - Funding Information:
This work was supported by the Japan Science and Technology Agency under the CREST program, Grant Number JPMJCR16P2 and the US Department of Energy, Basic Energy Sciences under grant DE-FG02-96ER14669 . We also acknowledge the assistance of Dr. Norihisa Fukaya (AIST) for XRF measurements. Appendix A
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2020/2/5
Y1 - 2020/2/5
N2 - A one-pot redox deposition method is described to prepare silica-supported bimetallic NiPt and CuPt catalysts using differences in standard reduction potentials. The synthesis involved the initial reduction of non-noble metal ions (Ni2+ and Cu2+) by NaBH4, followed by reduction of Pt ions by these reduced metals. Alloy formation and phase purity were established by X-ray diffraction (XRD), bulk composition by X-ray fluorescence (XRF), and surface composition by X-ray photoelectron spectroscopy (XPS). Alloy formation was enhanced by increase in the amount of base metals available to reduce Pt, or through the use of excess NaBH4 after redox deposition. The catalysts were evaluated for methane oxidation at 300-400 °C and atmospheric pressure. Reference samples prepared using the incipient wetness impregnation (IW) method had inferior performance and characteristics. The redox deposition method provides a simple and versatile protocol for the preparation of bimetallic alloys between noble metals and base metals.
AB - A one-pot redox deposition method is described to prepare silica-supported bimetallic NiPt and CuPt catalysts using differences in standard reduction potentials. The synthesis involved the initial reduction of non-noble metal ions (Ni2+ and Cu2+) by NaBH4, followed by reduction of Pt ions by these reduced metals. Alloy formation and phase purity were established by X-ray diffraction (XRD), bulk composition by X-ray fluorescence (XRF), and surface composition by X-ray photoelectron spectroscopy (XPS). Alloy formation was enhanced by increase in the amount of base metals available to reduce Pt, or through the use of excess NaBH4 after redox deposition. The catalysts were evaluated for methane oxidation at 300-400 °C and atmospheric pressure. Reference samples prepared using the incipient wetness impregnation (IW) method had inferior performance and characteristics. The redox deposition method provides a simple and versatile protocol for the preparation of bimetallic alloys between noble metals and base metals.
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U2 - 10.1016/j.apcata.2019.117371
DO - 10.1016/j.apcata.2019.117371
M3 - Article
AN - SCOPUS:85077643319
SN - 0926-860X
VL - 591
JO - Applied Catalysis A: General
JF - Applied Catalysis A: General
M1 - 117371
ER -