Engineering Nickel/Palladium Heterojunctions for Dehydrogenation of Ammonia Borane: Improving the Catalytic Performance with 3D Mesoporous Structures and External Nitrogen-Doped Carbon Layers

Abstract

Catalysts based on metallic NPs have shown high activities in heterogeneous catalysis, due to their high fractions of surface-active atoms, which, however, will lead to the sacrifices in stability and recycle of catalysts. In order to balance well the relationship between activity, stability, and recovery, in this paper, we have constructed a 3D mesoporous sphere structure assembled by N-doped carbon coated Ni/Pd NP heterojunctions (Ni/Pd@N–C). This obtained Ni/Pd@N–C has shown high catalytic activity, durability and recyclability for the hydrolytic dehydrogenation of ammonia borane (AB). Further investigations, including experimental and theoretical results, have shown that the unique structural features, the synergistic effect between Ni and Pd, and the coating of N-doped carbon layer are responsible for the good catalytic performance of Ni/Pd@N–C mesoporous spheres.

Atomic Interface‐Exciting Catalysis on Cobalt Nitride‐Oxide for Accelerating Hydrogen Generation

“…[ 27 ] The synergistic effect of NiPd heterogeneous interface promotes the adsorption of water, and improves the catalytic activity of ammonia borane hydrolysis. [ 28 ] However, all the synergistic effects between different metals, and relatively few studies are on different components of the same metal. An appropriate interface engineering is also a powerful tool to adjust the electronic structure of active centers through electronic interaction, interfacial bonding, and boundary lattice strain.…”

A novel core–shell Pd(0)@enSiO2–Ni–TiO2 nanocomposite with a synergistic effect for efficient hydrogenations

“…In addition, two satellite peaks were also observed at 860.8 eV and 879.6 eV. 30 The XPS of the reused catalyst (after 5 catalytic runs) is represented in Fig. 2c and d.…”

“…43,44 Periodic lattice fringes observed with a spacing of 0.336 nm can be ascribed to the interference lattice fringes of Pd and Ni. 30,42 XRD of Pd(0)@enSiO 2 -Ni-TiO 2 was performed to study the crystalline nature of the catalyst. In the XRD spectra of the catalyst, peaks at 25.41, 37.91, 48.131, 551, and 62.41 correspond to the (101), (004), ( 200), ( 211) and (204) planes of titania, 45 whereas the weak diffraction peaks at 45.31, 681 and 821 correspond to the (111) plane of Ni and the (220) and (331) planes of Pd, respectively, in a face centred cubic crystal (fcc).…”

Recent progress on the synthesis and oxygen reduction applications of Fe-based single-atom and double-atom catalysts

“…or defects has been conrmed to be a benecial method to regulate the electronic structure of the center metal atom and control the electronic conguration of the substrate. [72][73][74][75][76][77][78][79][80][81][82][83][84] These heteroatoms doping strategies can be further used to modify the coordination environment of the Fe sites.…”