Sintering and carbon deposition of Ni-based catalysts limit dry reforming of methane (DRM) reaction. Herein, honeycomb-structural AlO was prepared and supported with Ni (Ni/AlO) to enhance coke tolerance during the DRM reaction. Compared to AlO-CT obtained from Al(NO)·9HO treated with citric acid and triethanolamine, the AlO-AN obtained from Al(NO)·9HO treated with amide still has a stable honeycomb structure at high temperatures and can inhibit the sintering of Ni particles and sufficiently expose the active sites. TEM results showed that the average particle sizes of Ni/AlO-CT and Ni/AlO-AN were 9.1 nm and 7.6 nm, respectively. After a 100-hour reaction, the conversion of CH and CO on Ni/AlO-CT decreased by approximately 13%, while on Ni/AlO-AN, the conversion of CH and CO decreased by approximately 6%. The SEM results showed that the average particle sizes of Ni/AlO-CT and Ni/AlO-AN were 24.2 nm and 14.3 nm, respectively. The thermogravimetric (TG) curves indicated that carbon deposition on Ni/AlO-AN mainly occurred in the early stage of the DRM reaction with excellent coke tolerance. In situ DRIFT spectra showed that the stable honeycomb structure on Ni/AlO-AN enhanced the activation efficiency of CO on the catalyst.

中文翻译：

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在蜂窝状结构 Al2O3 上稳定 Ni，增强甲烷干重整耐焦炭能力


镍基催化剂的烧结和碳沉积限制了甲烷干重整（DRM）反应。在此，制备了蜂窝状结构的 Al2O3，并用 Ni (Ni/Al2O3) 负载，以增强 DRM 反应过程中的焦炭耐受性。与用柠檬酸和三乙醇胺处理的Al(NO)·9HO得到的AlO-CT相比，用酰胺处理的Al(NO)·9HO得到的AlO-AN在高温下仍然具有稳定的蜂窝结构，并且可以抑制Al(NO)·9HO的烧结。 Ni颗粒并充分暴露活性位点。 TEM结果显示Ni/Al2O-CT和Ni/Al2O-AN的平均粒径分别为9.1 nm和7.6 nm。反应100小时后，Ni/Al2O-CT上CH和CO的转化率下降了约13%，而在Ni/Al2O-AN上，CH和CO的转化率下降了约6%。 SEM结果显示Ni/AlO-CT和Ni/AlO-AN的平均粒径分别为24.2 nm和14.3 nm。热重（TG）曲线表明Ni/AlO-AN上的碳沉积主要发生在DRM反应的早期阶段，具有良好的耐积炭能力。原位DRIFT光谱表明Ni/Al2O-AN上稳定的蜂窝结构提高了催化剂上CO的活化效率。