The effects of Zn addition on the catalytic performance of CoZn(x)/ZrO₂ catalyst (x = 0–3 wt.%) in the dry reforming of methane were investigated. The presence of an appropriate amount of Zn produced a noticeable improvement in the catalytic performance. The addition of Zn to a Co/ZrO₂ catalyst, at a ratio of up to 2 wt.%, had a positive effect on the catalyst stability, whereas further addition beyond this threshold had the opposite effect. The XPS and TGA results indicated that the surface Co species on both the Co/ZrO₂ and CoZn(2)/ZrO₂ catalysts were oxidized by the CO₂. However, the oxidation rate of the two catalysts differed; the Co/ZrO₂ catalyst oxidized faster and to a greater degree than the CoZn(2)/ZrO₂ catalyst. Therefore, the Co/ZrO₂ catalyst was rapidly deactivated due to the loss of active sites by the oxidation, whereas the Zn−promoted catalyst exhibited a more stable catalytic activity as the oxidation of Co was prevented by formation of a Co−Zn alloy.

研究了锌的添加对甲烷干重整中CoZn（x）/ ZrO ₂催化剂（x = 0-3 wt。％）的催化性能的影响。适量的Zn的存在在催化性能上产生了显着的改善。Zn以高达2wt。％的比例添加到Co / ZrO ₂催化剂中对催化剂稳定性具有积极影响，而超过该阈值的进一步添加则具有相反的效果。XPS和TGA结果表明Co / ZrO ₂和CoZn（2）/ ZrO ₂催化剂上的表面Co物种均被CO ₂氧化。但是，两种催化剂的氧化速率不同。Co / ZrO ₂催化剂的氧化速度比CoZn（2）/ ZrO ₂催化剂更快，而且氧化程度更高。因此，Co / ZrO ₂催化剂由于氧化而失去了活性位，因此迅速失活，而Zn促进的催化剂则表现出更稳定的催化活性，因为通过形成Co-Zn合金可防止Co的氧化。