Background Cerium oxide (CeO2) is a technologically important material due to its properties and applications in several areas that range from engineering to biological sciences. Despite the hydrothermal microwave method versatility, its crystallization kinetics has low speed when the processing temperatures are below 300°C which are the desired conditions for soft chemistry processes [1,2]. At...

We carried out density functional theory calculations to investigate the ripening of Pd clusters on CeO2(111). Starting from stable Pd n clusters (n = 1-21), we compared how these clusters can grow through Ostwald ripening and coalescence. As Pd atoms have mobility higher than that of Pd n clusters on the CeO2(111) surface, Ostwald ripening is predicted to be the dominant sintering mechanism. P...

Thermodynamic calculation has been applied to predict the inclusion formation in molten SS400 steel. When the Cerium addition in liquid iron is 70 ppm and the initial Oxygen and Sulphur are both 110 ppm, the formation of oxides containing Cerium would experience the transformation from Ce2O3 to CeO2 and also the formation of sulfides containing Cerium would experience the transformation from Ce...

Monometallic Pd and Ni bimetallic Pd–Ni catalysts supported on CeO2 are prepared via mechanochemical conventional incipient wetness impregnation methods tested for the production of syngas by partial oxidation methane. Compared with monometallic Ni/CeO2 Pd/CeO2, Pd–Ni/CeO2 show considerable higher methane conversion yield. Additionally, ball milling produce at lower temperature. Different prepa...

Grafted tungstophosphoric acid (H3PW12O40/ HPW) is applied as a catalyst in the selective catalytic reduction of NOx with NH3 (NH3-SCR). The HPW/CeO2 has been found to be effective SCR reaction compared HPW/SiO2. cobalt-exchanged improved conversion, which reached 98% over wide operating temperature window (280–500 °C). better performance CoPW/CeO2 mainly due higher dispersion tungsten on CeO2 ...

CeO2を担体とした一連のPt系二元金属触媒 (Pt3M/CeO2, M = Bi, Ga, Ge, In, Sn) を調製し，電場下でのメタン非酸化カップリングにおいて300℃という比較的低温領域にてその触媒性能を試験した。単金属Pt（Pt/CeO2）およびPtをGeまたはInで修飾した触媒（Pt3Ge/CeO2，Pt3In/CeO2）では反応はほとんど進行しなかったが，PtをSnまたはBiで修飾した触媒（Pt3Sn/CeO2，Pt3Bi/CeO2）では，エタンおよびエチレンの収率が大きく向上し，Ptのみの場合に比べそれぞれ100倍，70倍に向上した。またこれらの触媒ではプロパンとプロピレンの生成も少量確認された。単位電力当たりの触媒活性で比較すると，Pt3Bi/CeO2はPt3Sn/CeO2に比べ2.4倍の活性を示しただけでなく，オレフィン含有量も高かった。

The performance of solid oxide electrolysis (SOE) cells while operating in the natural gas assisted steam electrolysis (NGASE) mode was evaluated. The SOE cells used yttria-stabilized-zirconia (YSZ) as the oxygen ion conducting electrolyte, Co–CeO2–YSZ as the H2–H2O electrode, and Pd-doped CeO2 YSZ source as the CH4-oxidation electrode. The cell electrochemical performance was evaluated as a fu...

Zeolite (NaX, NaX-CeO2) and mixed oxide (Co4MnAl, NiMgMn) catalysts were tested in catalytic oxidation of volatile organic compounds (VOCs). The different kinds of catalysts proved remarkable activity in catalytic oxidation of ethanol and isopropanol respectively. The deepen comparison revealed that basic zeolite NaX-CeO2 is more suitable for oxidation of isopropanol while oxidation of ethanol ...