The WGS reaction over multicomponent Au/Ce_1-xCu_xO₂/Al₂O₃ catalysts is studied in this work. The systems are carefully designed aiming to take advantage of every active phase included in the formulation: gold, ceria and copper. Special emphasis is given to the CeO₂-CuO synergy and its influence on the displayed catalytic performance with and without gold. To this aim a meaningful correlation between the physicochemical properties of the mixed materials and their activity/stability is proposed. In general terms the developed catalysts present high activity under realistic WGS reaction conditions, with fairly good long term stability. In addition, the systems successfully withstand start-up/shut-downs situations, indispensable requisite for real applications in the field of pure hydrogen production for fuel cell goals.

中文翻译：

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Au，Cu和CeO2的作用及其相互作用对提高WGS性能的作用

在这项工作中研究了在多组分Au / Ce _1-x Cu _x O ₂ / Al ₂ O ₃催化剂上的WGS反应。该系统经过精心设计，旨在利用配方中包含的每个活性相：金，氧化铈和铜。特别强调CeO ₂-有或没有金时，CuO协同作用及其对显示的催化性能的影响。为了这个目的，提出了混合材料的物理化学性质与其活性/稳定性之间的有意义的关联。一般而言，已开发的催化剂在实际的WGS反应条件下表现出高活性，并具有相当好的长期稳定性。此外，该系统成功地经受了启动/关闭的情况，这对于在纯氢生产领域中实际应用对于燃料电池而言是必不可少的。