57Fe Mossbauer Spectroscopy of Ir-Fe Catalysts for Preferential CO Oxidation in H2

被引：3

作者：

Liu Kuo ^{[1
,2
]}

Zhang Wansheng ^{[1
]}

Wang Junhu ^{[1
]}

Wang Aiqin ^{[1
]}

Huang Yanqiang ^{[1
]}

Jin Changzi ^{[1
]}

Shen Jianyi ^{[3
]}

Zhang Tao ^{[1
]}

机构：

[1] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China

[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

[3] Nanjing Univ, Dept Chem, Nanjing 210093, Jiangsu, Peoples R China

来源：

CHINESE JOURNAL OF CATALYSIS | 2010年 / 31卷 / 11期

基金：

中国国家自然科学基金;

关键词：

carbon monoxide; selective oxidation; iridium; iron; quasi Mossbauer spectroscopy; microcalorimetry; metal-metal interaction; CARBON-MONOXIDE; ROOM-TEMPERATURE; HYDROGEN; NANOPARTICLES; PROMOTION; SURFACE; GASES; PTFE;

D O I：

10.1016/S1872-2067(10)60122-2

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

New insights on the interaction between Ir and Fe oxide are reported. Three Ir-Fe catalysts were prepared by different impregnation sequences of an Al2O3 support. Co-impregnation gave a better catalyst for the preferential CO oxidation in H-2 (PROX) reaction. Microcalorimetry data showed that the adsorption of CO and H-2 were different. Quasi in situ Mossbauer data of the three catalysts after reduction, reoxidation, and PROX reaction showed that a strong interaction between Ir and Fe affected the redox properties of the Ir-Fe catalysts. CO conversion was proportional to the concentration of the Fe2+(a) species, thus, Fe2+(a) was an active site in the PROX reaction. The impregnation sequence influenced the interaction between Ir and Fe and consequently, the amount of the active Fe2+(a) species. A strong Ir-Fe interaction stabilized the active Fe2+ sites for activating O-2.

引用

页码：1335 / 1341

页数：7

共 50 条

[1] Quasi In Situ 57Fe Mossbauer Spectroscopic Study: Quantitative Correlation between Fe2+ and H2 Concentration for PROX over Ir-Fe/SiO2 Catalyst
Liu, Kuo
Wang, Aiqin
Zhang, Wansheng
Wang, Junhu
Huang, Yangiang
Shen, Jianyi
Zhang, Tao
JOURNAL OF PHYSICAL CHEMISTRY C, 2010, 114 (18): : 8533 - 8541
[2] 57Fe Mossbauer spectroscopy of tektites
Rossano, S
Balan, E
Morin, G
Bauer, JP
Calas, G
Brouder, C
PHYSICS AND CHEMISTRY OF MINERALS, 1999, 26 (06) : 530 - 538
[3] 57Fe MOSSBAUER SPECTROSCOPY OF U6Fe.
Lemon, G.
Boolchand, P.
Stevens, M.
Marcuso, M.
DeLong, L.E.
Huber, J.G.
1600, (127):
[4] 57Fe Mossbauer spectroscopy studies on Fe/Mo multilayers
Murakami, Y.
Ohkubo, Y.
Fuse, D.
Sakamoto, Y.
Hamada, Y.
Ono, T.
Kitao, S.
Seto, M.
Tanigaki, M.
Saito, T.
Nasu, S.
Kawase, Y.
KURRI Progress Report, 2003,
[5] Application of 57Fe Mossbauer spectroscopy to hydrometallurgy
Anand, S.
Verma, H. C.
INDIAN JOURNAL OF PURE & APPLIED PHYSICS, 2007, 45 (10) : 800 - 804
[6] 57Fe Mossbauer Spectroscopy Characterization of Electrocatalysts
Kramm, Ulrike, I
Ni, Lingmei
Wagner, Stephan
ADVANCED MATERIALS, 2019, 31 (31)
[7] Mossbauer spectroscopy studies of 57Fe in diamond
Bharuth-Ram, K
HYPERFINE INTERACTIONS, 2003, 151 (01): : 21 - 30
[8] 57Fe Mossbauer studies in Mo-Fe supported catalysts
Castelao-Dias, M
Costa, BFO
Quinta-Ferreira, RM
HYPERFINE INTERACTIONS, 2001, 136 (1-2): : 9 - 16
[9] 57Fe Mossbauer Spectroscopy of Radiation Damaged Allanites
Malczewski, D.
Grabias, A.
ACTA PHYSICA POLONICA A, 2008, 114 (06) : 1683 - 1690
[10] 57Fe Mossbauer spectroscopy of annealed metamict davidite
Malczewski, Dariusz
Frackowiak, Janusz F.
Galuskin, Evgeny V.
NUKLEONIKA, 2007, 52 : S81 - S84

← 1 2 3 4 5 →