Electronic metal-support interaction enhanced ammonia decomposition efficiency of perovskite oxide supported ruthenium

Promotion of Low-Temperature Catalytic Activity of Ru-Based Catalysts for Ammonia Decomposition via Lanthanum and Cesium Codoping

“…58,59 After loading with the active component Ru and the promoters La and Cs, the characteristic microscopic morphology of the γ-Al 2 O 3 support can still be observed, indicating that the active components and promoters were uniformly dispersed on the surface of the support, which is consistent with the XRD results. In addition, the lattice fringes (0.205 nm) of the Ru(101) crystalline surface 60 can be observed in the HRTEM images. As shown in Table 2, the Ru content in all Ru catalysts is about 1.0 wt %, which was determined by the ICP-OES analysis and was basically consistent with the expected Ru content from the experiments.…”

“…As seen from the images with a scale of 100 nm, a typical characteristic morphology of a γ-Al 2 O 3 support consists of fibrous, flaky or globular, and amorphous particles. , After loading with the active component Ru and the promoters La and Cs, the characteristic microscopic morphology of the γ-Al 2 O 3 support can still be observed, indicating that the active components and promoters were uniformly dispersed on the surface of the support, which is consistent with the XRD results. In addition, the lattice fringes (0.205 nm) of the Ru(101) crystalline surface can be observed in the HRTEM images.…”

Recent Progress on Hydrogen Production from Ammonia Decomposition: Technical Roadmap and Catalytic Mechanism

“…Firstly, a support with a high specific surface area can enhance the dispersal of Ru nanoparticles, leading to improved NH 3 adsorption capacity [ 92 , 93 , 94 ]. Secondly, the characteristics of the support itself can have a synergistic effect with Ru nanoparticles, thereby enhancing catalytic activity [ 23 , 95 , 96 , 97 , 98 , 99 ]. For example, Jeon et al synthesized a Y-doped BaCeO 3 perovskite and constructed a strong metal support interaction (SMSI) interface with Ru particles, as shown in Figure 13 [ 95 ].…”

Promotion effects of different methods in COx-free hydrogen production from ammonia decomposition

“…Meanwhile, Zhu et al 81 found that the electronic structure of LaAlO 3 perovskite could be modulated by the substitution of heterovalent cations. Cao et al 82 prepared LaAlO 3 to load Ru nanoparticles and further found that the activity order was Ru/La 0.8 Sr 0.2 AlO 3 > Ru/La 0.9 Sr 0.1 AlO 3 > Ru/La 0.7 Sr 0.3 AlO 3 > Ru/LaAlO 3 . A certain amount of Sr ion substitution could enhance the electron donor capacity of the support and accelerate the recombination and desorption of nitrogen in the process of ammonia decomposition.…”