Biomass-derived gas and unused industrial byproducts are resources for H₂ production with low CO₂ emission; however, they contain > 1000 ppm H₂S, which necessitates the use of H₂S-tolerant catalysts. Herein, a pure CeO₂ catalyst demonstrated stable and efficient H₂ production via the dry reforming reaction in the presence of 2000 ppm H₂S. No impurity phases and carbon deposition appeared on the catalyst after the reaction. Moreover, CeO₂ catalytic activity improved with H₂S concentration. The effect of H₂S on CeO₂ was determined by in situ infrared spectroscopy and S K-edge X-ray absorption near-edge structure studies. The re-oxidation of CeO₂ by CO₂, a key step of the dry reforming reaction, was accelerated by the rapid redox cycle of sulfur, which promoted CH₄ activation and decreased the apparent activation energy from 125 to 101 kJ/mol. The redox cycle of S made the pure CeO₂ catalyst resistant to high concentration of H₂S.

生物质衍生的气体和未使用的工业副产品是用于生产H _2的资源，其CO ₂排放低。但是，它们含有> 1000 ppm的H ₂ S，因此必须使用耐H ₂ S的催化剂。在此，纯的CeO ₂催化剂在2000ppm H ₂ S的存在下通过干重整反应表现出稳定且有效的H ₂产生。反应后，催化剂上没有出现杂质相和碳沉积。此外，CeO _2的催化活性随H ₂ S浓度的提高而提高。H ₂ S对CeO _2的影响通过原位红外光谱和S K边缘X射线吸收近边缘结构研究确定。硫的快速氧化还原循环促进了干重整反应关键步骤CeO ₂被CO ₂的再氧化，从而促进了CH _4的活化并将表观活化能从125 kJ / mol降低。S的氧化还原循环使纯CeO ₂催化剂对高浓度的H ₂ S具有抗性。