Chromium addition to alumina-supported platinum catalysts and effect on catalytic activity in methane combustion

Mardwita; Hideki Matsune; Sakae Takenaka; Masahiro Kishida

doi:10.1252/jcej.12we025

Chromium addition to alumina-supported platinum catalysts and effect on catalytic activity in methane combustion

Mardwita, Hideki Matsune, Sakae Takenaka, Masahiro Kishida

Molecular and Biochemical Systems Engineering

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

We investigated the addition of chromium to alumina-supported Pt catalysts and its effect on catalytic activity in methane combustion. The Pt and Cr binary alumina-supported catalysts exhibited much higher activity than those without Cr. Alumina-supported Cr catalysts contain two chromium species, Cr ³⁺ and Cr ⁶⁺. From XPS analysis, it was found that more Cr ⁶⁺ species existed in the binary catalysts than in the single alumina-supported Cr catalysts. Pt species in the binary catalysts may promote Cr oxidation. Since Cr ⁶⁺ species are known to be more active than Cr3ff species in oxidation reactions, the increase in Cr ⁶⁺ in the binary catalysts may contribute to their higher activity compared with the Pt/Al ₂O ₃ catalyst.

Original language	English
Pages (from-to)	493-497
Number of pages	5
Journal	JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
Volume	45
Issue number	7
DOIs	https://doi.org/10.1252/jcej.12we025
Publication status	Published - Jul 31 2012

All Science Journal Classification (ASJC) codes

Chemistry(all)
Chemical Engineering(all)

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title = "Chromium addition to alumina-supported platinum catalysts and effect on catalytic activity in methane combustion",

abstract = "We investigated the addition of chromium to alumina-supported Pt catalysts and its effect on catalytic activity in methane combustion. The Pt and Cr binary alumina-supported catalysts exhibited much higher activity than those without Cr. Alumina-supported Cr catalysts contain two chromium species, Cr 3+ and Cr 6+. From XPS analysis, it was found that more Cr 6+ species existed in the binary catalysts than in the single alumina-supported Cr catalysts. Pt species in the binary catalysts may promote Cr oxidation. Since Cr 6+ species are known to be more active than Cr3ff species in oxidation reactions, the increase in Cr 6+ in the binary catalysts may contribute to their higher activity compared with the Pt/Al 2O 3 catalyst.",

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AU - Mardwita,

AU - Matsune, Hideki

AU - Takenaka, Sakae

AU - Kishida, Masahiro

PY - 2012/7/31

Y1 - 2012/7/31

N2 - We investigated the addition of chromium to alumina-supported Pt catalysts and its effect on catalytic activity in methane combustion. The Pt and Cr binary alumina-supported catalysts exhibited much higher activity than those without Cr. Alumina-supported Cr catalysts contain two chromium species, Cr 3+ and Cr 6+. From XPS analysis, it was found that more Cr 6+ species existed in the binary catalysts than in the single alumina-supported Cr catalysts. Pt species in the binary catalysts may promote Cr oxidation. Since Cr 6+ species are known to be more active than Cr3ff species in oxidation reactions, the increase in Cr 6+ in the binary catalysts may contribute to their higher activity compared with the Pt/Al 2O 3 catalyst.

AB - We investigated the addition of chromium to alumina-supported Pt catalysts and its effect on catalytic activity in methane combustion. The Pt and Cr binary alumina-supported catalysts exhibited much higher activity than those without Cr. Alumina-supported Cr catalysts contain two chromium species, Cr 3+ and Cr 6+. From XPS analysis, it was found that more Cr 6+ species existed in the binary catalysts than in the single alumina-supported Cr catalysts. Pt species in the binary catalysts may promote Cr oxidation. Since Cr 6+ species are known to be more active than Cr3ff species in oxidation reactions, the increase in Cr 6+ in the binary catalysts may contribute to their higher activity compared with the Pt/Al 2O 3 catalyst.

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