众所皆知铁具有催化钻石，使其更容易石墨化的能力 (第一篇论文) 多数论文有提到 若氧参与将形成氧化铁，催化的能力会比单纯只有铁更好 钻石更容易石墨化 (第二篇论文) 然而我最近看了一篇论文 他提到在「合成钻石」时 若氧在铁表面产生氧化铁层 这种氧化铁层会限制铁与石墨的接触 进而降低钻石的生长速率(催化能力降低) (第三篇论文) 另一篇论文也提到 透过氧-铁复合物催化剂可以大大降低活化能 来增强钻石-石墨之间的正向与逆向反应 抑制石墨化、合成钻石的效果更强 (说实话这边我就看不太懂他在说什麽) 第三篇论文段落撷取：Compared to metal, metal oxide is not an effective catalyst in synthesis of diamond. In fact, researchers have found that iron oxide covering iron catalyst will lower the catalytic efficiency for diamond growth by limiting the direct contact between graphite and iron, and such restraining effect becomes stronger with an increasing oxide thickness [10]. As catalysts enhance both, the forward and backward reactions of diamond-graphite transition by drastically lowering the activation energy, the formation of metal oxide on clean metal surface shall also restrain the graphitization of diamond. An increased oxygen pressure that accelerates the oxide growth could strengthen such influence. Although it is theoretically possible for carbon to extract oxygen from metal oxide, such reduction reaction usually requires the elevated temperature, similar to the oxidation of diamond. 总之，若把这几篇论文拿来一起思考，就让我搞不太懂 为什麽有些论文写氧化铁会更易使钻石石墨化 有些则写氧化铁可以隔离铁与钻石，钻石会比较不易石墨化 到底谁对谁错？有点矛盾 请求化学高手回答...苦恼很久 注：若想看那几篇论文可以留言，我会私信给档案，感谢 --

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