Samples of the zeolite mordenite with different Si/Al ratios were used to synthesize materials with monomeric and oligomeric copper sites that are active in the direct conversion of methane into methanol. A comparison of two reactivation protocols with oxygen (aerobic oxidation) and water (anaerobic oxidation), respectively, revealed that such copper–oxo species possess different reactivity towards methane and water. We show for the first time that oligomeric copper species exhibit high activity under both aerobic and anaerobic activation conditions, whereas monomeric copper sites produce methanol only in aerobic processes.

中文翻译：

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甲烷在好氧和厌氧转化中活性部位结构对铜丝光沸石活性的影响

使用具有不同Si / Al比的沸石丝光沸石样品来合成具有单体和低聚铜位点的材料，这些位点在甲烷直接转化为甲醇中具有活性。分别用氧气（有氧氧化）和水（厌氧氧化）对两种再活化方案进行比较，发现这种铜-氧化合物对甲烷和水具有不同的反应性。我们首次表明，低聚铜物质在需氧和厌氧活化条件下均表现出高活性，而单体铜位仅在需氧过程中产生甲醇。