Carolina A. Garcia-Soto, Edmond Baratte, Tiago Silva, Vasco Guerra, Vasile I. Parvulescu, Olivier Guaitella
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引用次数: 0
Abstract
In situ FTIR transmission experiments for \(\hbox {CO}_2\) and \(\hbox {CO}_2\)–\(\hbox {CH}_4\) plasma were performed for a fundamental study of surface plasma interaction with cerium oxide (\(\hbox {CeO}_2\)) as catalytic surface. Utilizing a DC glow discharge plasma reactor at low pressure, it was observed that \(\hbox {CO}_2\) gas adsorbs in the surface forming tridentate carbonates and hydrogen carbonates. When \(\hbox {CO}_2\)–\(\hbox {CH}_4\) plasma is ignited, formate species were formed while carbonate species disappeared from the surface. The \(\hbox {CeO}_2\) pellet has also been placed downstream the plasma in order to observe the role of the gas composition at the exit of \(\hbox {CO}_2\)–\(\hbox {CH}_4\) plasma on \(\hbox {CeO}_2\) without any heating or strong electric field. In addition, the effect of water was investigated in several surface phenomena. OH groups play an important role in the reaction with tridentate carbonates to generate formates under plasma. The gas phase chemistry of the \(\hbox {CO}_2\)–\(\hbox {CH}_4\) plasma used here has been described in details in the part I of this work. The conclusions drawn on the gas phase contribute to the understanding of the observed phenomena on \(\hbox {CeO}_2\). These results enlighten the complex mechanisms occurring during \(\hbox {CO}_2\)–\(\hbox {CH}_4\) plasma reactions on surfaces that could help in the improvement of \(\hbox {CO}_2\) recycling.
期刊介绍：
Publishing original papers on fundamental and applied research in plasma chemistry and plasma processing, the scope of this journal includes processing plasmas ranging from non-thermal plasmas to thermal plasmas, and fundamental plasma studies as well as studies of specific plasma applications. Such applications include but are not limited to plasma catalysis, environmental processing including treatment of liquids and gases, biological applications of plasmas including plasma medicine and agriculture, surface modification and deposition, powder and nanostructure synthesis, energy applications including plasma combustion and reforming, resource recovery, coupling of plasmas and electrochemistry, and plasma etching. Studies of chemical kinetics in plasmas, and the interactions of plasmas with surfaces are also solicited. It is essential that submissions include substantial consideration of the role of the plasma, for example, the relevant plasma chemistry, plasma physics or plasma–surface interactions; manuscripts that consider solely the properties of materials or substances processed using a plasma are not within the journal’s scope.
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