Supported metal catalysts of high intrinsic catalytic activities with significant mass and heat-transport properties are constructed via in situ synthesis based on the interfacial hydrothermal-oxidation/reductive-exolution (HO/RE) chemistry of Al metal substrates. The hydrothermal reaction of Al metal particles in an aqueous solution of Ni salt gives rise to the formation of [email protected] core-shell microstructure consisting of an Al core and a NiAl layered double hydroxide (LDH) shell with petal-like surface morphology. A reduction of the [email protected] leads to exolution of Ni atoms from the NiAl-LDH shell, developing fine Ni metal nanoparticles (NPs) with high surface dispersion and size uniformity. The mechanism of heterogeneous formation of MeAl-LDH (Me = hetero-metals) structures from Al metal substrate is suggested in detail. For CO₂ methanation, the Ni/Al₂O₃@Al exhibits a three-fold greater turnover frequency (TOF) than the Ni/Al₂O₃ catalyst prepared by the conventional impregnation method, indicating the marked intrinsic catalytic properties of the Ni/Al₂O₃@Al catalyst.

通过原位构建具有高固有催化活性，具有显着质量和传热性能的负载型金属催化剂铝金属基体的界面水热氧化/还原-洗脱（HO / RE）化学的化学合成。Al金属颗粒在Ni盐水溶液中的水热反应导致形成[电子邮件保护的]核-壳微结构，该结构由Al核和具有花瓣状表面形态的NiAl层状双氢氧化物（LDH）壳组成。受[电子邮件保护]的减少会导致Ni原子从NiAl-LDH壳层中洗脱出来，从而开发出具有高表面分散度和尺寸均匀性的精细Ni金属纳米颗粒（NPs）。详细提出了从铝金属基底异质形成MeAl-LDH（Me =异金属）结构的机理。对于CO ₂甲烷化，Ni / Al ₂ O ₃Al显示出比通过常规浸渍方法制备的Ni / Al ₂ O ₃催化剂高三倍的周转频率（TOF），表明Ni / Al ₂ O ₃ Al催化剂具有显着的固有催化性能。