In situ/operando studies for the production of hydrogen through the water-gas shift on metal oxide catalysts

2013 ◽  
Vol 15 (29) ◽  
pp. 12004 ◽  
Author(s):  
José A. Rodriguez ◽  
Jonathan C. Hanson ◽  
Dario Stacchiola ◽  
Sanjaya D. Senanayake
Keyword(s):  
Metal Oxide ◽  
Oxide Catalysts ◽  
Water Gas Shift ◽  
Metal Oxide Catalysts ◽  
Production Of Hydrogen ◽  
Water Gas ◽  
Operando Studies

Analytical TEM Observations of Combinatorial Catalyst Libraries for Hydrogen Production – As a Part of “MATERIOMICS”–

2003 ◽  
Vol 804 ◽  
Author(s):  
T. Akita ◽  
A. Ueda ◽  
Y. Yamada ◽  
S. Ichikawa ◽  
K. Tanaka ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Metal Oxide ◽  
Hydrogen Reduction ◽  
Oxide Catalysts ◽  
Water Gas Shift ◽  
Metal Oxide Catalysts ◽  
Water Gas Shift Reaction ◽  
Metal Metal ◽  
Shift Reaction ◽  
Water Gas

ABSTRACTMateriomics is a new approach combining combinatorial surveys and precise structure analyses in order to develop new functional materials efficiently. In this paper, we show the first stage of materiomics applied to metal/metal oxide catalysts. The catalytic activities of various metal/metal oxide catalysts for hydrogen production have been examined by a combinatorial method, and TEM observations have been performed for the selected catalysts from the libraries in order to estimate the structures in the combinatorial surveys. A Pd/MnO2 catalyst shows the high activity for the water gas shift reaction, where thin Pd oxide layers about 1–2nm thickness are formed on the flat MnO2 surface. However, Pd oxide layers are reduced and metallic Pd particles 2–3nm in diameter with narrow size distribution are formed after hydrogen reduction. The structure of manganese oxide support also changes after hydrogen reduction. On the other hand, both Pd particles with diameters of 2–3nm and 10–20nm on SiO2 show low activity for the water gas shift reaction. Thus, it is concluded that the catalytic activity does not simply depend on the particle size of metals, but that the interaction between metals and metal oxide supports is also important for the catalytic performance.

In situ XPS investigations of Cu1−xNixZnAl-mixed metal oxide catalysts used in the oxidative steam reforming of bio-ethanol

2005 ◽  
Vol 55 (4) ◽  
pp. 287-299 ◽  
Author(s):  
Subramani Velu ◽  
Kenzi Suzuki ◽  
Munusamy Vijayaraj ◽  
Sanmitra Barman ◽  
Chinnakonda S. Gopinath
Keyword(s):  
Metal Oxide ◽  
Steam Reforming ◽  
Oxide Catalysts ◽  
Mixed Metal Oxide ◽  
Metal Oxide Catalysts ◽  
Mixed Metal ◽  
In Situ Xps ◽  
Mixed Metal Oxide Catalysts
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