New Insights into Copper Oxide Catalysts Could Improve Chemical Reactions
The behavior of catalysts that promote chemical reactions is not always straightforward. For example, adding oxygen enhances some catalytic oxidation reactions (reactions that introduce oxygen into chemical compounds) but suppresses others. Using a combination of experiments and computer simulations, scientists now understand how oxygen affects the way the catalyst copper oxide (CuO) reacts with hydrogen (H2) versus carbon monoxide (CO) gases. They found that peroxides (OO) form on the CuO surface when too much oxygen is present. These peroxides change how the copper and oxygen atoms are arranged on the surface of the CuO. This allows hydrogen gas to break apart on the surface but prevents CO adsorption.
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