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Alpha alumina (α‐Al2O3) are inert materials with outstanding thermal, chemical and mechanical stability. Herein, we fabricate porous single‐crystalline (PSC) α‐Al2O3 monoliths at centimeter scale to endow them with high catalytic activity while maintaining their stability. We reduce PSC α‐Al2O3 monoliths to create oxygen vacancies in lattice and stabilize them by the ordered lattice to construct unsaturated Al−O coordination structures for enhancing the catalytic activity. The generation of oxygen vacancy at 18e wyckoff position contributes to the unsaturated Al−O coordination. As a case study, we demonstrate the outstanding performance with conversion (≈34 %) and selectivity (≈95 %) toward non‐oxidative dehydrogenation of ethane to ethylene at 700 °C. We achieve the outstanding performance without obvious degradation even after a continuous operation over 1000 hours at 700 °C. [ABSTRACT FROM AUTHOR]

Alpha alumina (α‐Al2O3) are inert materials with outstanding thermal, chemical and mechanical stability. Herein, we fabricate porous single‐crystalline (PSC) α‐Al2O3 monoliths at centimeter scale to endow them with high catalytic activity while maintaining their stability. We reduce PSC α‐Al2O3 monoliths to create oxygen vacancies in lattice and stabilize them by the ordered lattice to construct unsaturated Al−O coordination structures for enhancing the catalytic activity. The generation of oxygen vacancy at 18e wyckoff position contributes to the unsaturated Al−O coordination. As a case study, we demonstrate the outstanding performance with conversion (≈34 %) and selectivity (≈95 %) toward non‐oxidative dehydrogenation of ethane to ethylene at 700 °C. We achieve the outstanding performance without obvious degradation even after a continuous operation over 1000 hours at 700 °C. [ABSTRACT FROM AUTHOR]

Molybdenum carbide-based hydrogen evolution reaction (HER) electrocatalysts have attracted widespread attention with their low cost and relatively high catalytic activity. Despite the significant progress made in tuning the morphology and structure, the intrinsic catalytic activity of molybdenum carbide awaits further improvement. Herein, a Pt-decorated self-supported MoC-Mo 2 C electrode with super-intrinsic HER catalytic activity is prepared by a simple adsorption-electroreduction method. The HER performance is improved with increasing the loading of Pt. The optimal MoC-Mo 2 C-Pt heterojunction electrode has a low overpotential of 10 mA cm−2 (58 mV in H 2 SO 4 , 82 mV in KOH) and small Tafel slope (24 mV dec−1 in H 2 SO 4, 29 mV dec−1 in KOH), which is reduced to 0.45–0.5, 0.7–0.8, and 0.4–0.7 times of pristine MoC-Mo 2 C, Pt foil, and commercial Pt/C (2 mg cm−2), respectively. The improved HER catalysis is attributed to the rapid dissociation of water on MoC-Mo 2 C and efficient desorption of hydrogen on Pt. Therefore, decorating carbides with Pt is an effective way to design HER catalysts with enhanced catalytic activities in a wide pH range. [ABSTRACT FROM AUTHOR]