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| 1 | Two-dimensional atomically thin Pt layers on MXenes: The role of electronic effects during catalytic dehydrogenation of ethane and propane显示文摘Atomically thin Pt nanolayers were synthesized on the surface of Mo2TiC2 MXenes and used for the catalytic dehydrogenation of ethane and propane into ethylene and propylene,two important chemicals for the petrochemical industry.As compared with Pt nanoparticles,the atomically thin Pt nanolayer catalyst showed superior coke-resistance(no deactivation for 24 h),high activity(turnover frequencies(TOFs)of 0.4–1.2 s^(-1)),and selectivity(>95%)toward ethylene and propylene.The unique Pt nanolayer has a similar geometric surface to Pt nanoparticles,enabling the investigations of the electronic effect on the catalytic performance,where the geometric effect is negligible.It is found that the electronic effect plays a critical role in dehydrogenative product selectivity and catalyst stability.The metal–support interaction is found dependent on the substrate and metal components,providing wide opportunities to explore high-performance MXene-supported metallic catalysts. | Zhe Li Tobias K.Misicko Fan Yang Xiaopeng Liu Zhenwei Wu Xiaoyang Gao Tao Ma Jeffrey T.Miller Daniela S.Mainardi Collin D.Wick Zhenhua Zeng Yang Xiao Yue Wu | 2024 | Nano Research2024，17，3： | 0 |
| 2 | 乙烷脱氢制乙烯技术研究进展及趋势显示文摘在碳中和及全球能源供需版图调整的背景下,乙烯生产原料轻质化成为主流趋势。乙烷脱氢制乙烯技术具有低能耗、低碳排、流程短、收率高、成本低等优势,但目前工业上主要通过乙烷蒸汽裂解法生产乙烯,其他方法工业化生产相对不成熟。本文简述了近年来乙烷脱氢制乙烯技术(包括直接催化脱氢、O_(2)辅助氧化脱氢、CO_(2)辅助氧化脱氢、化学链氧化脱氢、催化膜反应器脱氢等)工艺及催化剂的研究现状,同时介绍了其他新兴工艺及催化剂。乙烷脱氢制乙烯技术现阶段面临的挑战不仅在于开发更高效的催化剂及更低能耗的技术,更需要突破乙烷脱氢热力学平衡的限制设计合适的反应路径,其中催化膜反应器脱氢、化学链氧化脱氢工艺都具有非常广阔的市场和工业化发展前景。 | 董雁春 | 2024 | 化学通报2024，87，2： | 0 |
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