Rhodium nanoparticles anchored on 3D metal organic framework-graphene hybrid architectures for high-performance electrocatalysts toward methanol oxidation

Recent progress on 2D material-based nanoarchitectures for small molecule electro-oxidation

“…The Pt/G-CN hybrids exhibit exceptional electrocatalytic capability regarding high electrocatalytic activity, unusually high poison tolerance, and reliable stability due to their superior structure when used as anode electrocatalysts for DMFCs. And such an efficient synthetic approach be extended to the fabrication of 3D nitrogen-enriched, carbon-based nanomaterials with metals or metal oxides, such as Pt/BN-GA, 77 Rh/BN-G, 78 3D LCNT/RGO, 79 3D Rh/G-ZIF, 80 Rh/G-CN, 81 3D Rh/MoS 2 -RGO, 82 3D Pd/MX-RGO. 83 Based on the above discussion, the 3D porous nanoarchitectures made of two-dimensional materials have several obvious merits including: (1) effectively prevents the agglomeration of two-dimensional materials; (2) provides abundant growth sites for the generation of the second component (like noble metal); (3) offers multiscale porous channels for the fast transportation of electrolyte and electrons; (4) maintain the good chemical stability of the catalyst's structure under electrocatalytic progress.…”

Advancements in Noble Metal-Decorated Porous Carbon Nanoarchitectures: Key Catalysts for Direct Liquid Fuel Cells

“…18,19 To overcome this deficiency, utilization of highefficiency anode catalysts has been recognized as a key technology and has been recently adopted in the field of fuel cells. 20,21 Extensive theoretical and experimental research has demonstrated that noble metals (such as Pt, Pd, and Rh) with moderate d-band centers can effectively adsorb small organic molecules; these noble metals commonly show a high electrocatalytic activity for the electrooxidation reaction of small organic molecules. 22−24 However, the traditional bulk structures of noble-metal crystals can expose a only small fraction of active metal atoms, while a large number of catalytically active sites remain imprisoned in the interior crystal space, resulting in a low utilization efficiency of noblemetal components.…”

Stereoassembly of ultrasmall Rh-decorated zeolite imidazolate framework–MXene heterostructures for boosted methanol oxidation reaction

“…One of the important representative metal-organic frameworks (MOFs), namely Zn-based zeolite imidazolate frameworks (ZIF-8), can be harvested under mild conditions with high structural stability and peculiar morphology with tailored porous microstructures through diverse solvothermal processes. [35][36][37] It is known that ZIF-8 displays benecial characteristics, such as well-dened pore structure, multiple active sites, and large specic surface area. [38][39][40] In particular, the rational combination of ZIF-8 and Ti 3 C 2 T x MXene nanosheets as the Rh support is expected to provide many advantages for the electrocatalytic process: (i) the ZIF-8 nanocrystals embedded in the Ti 3 C 2 T x structure can effectively prevent the reaggregation or restacking of the nanosheets; (ii) ZIF-8-modied MXene can provide a large number of available active platforms and abundant immobilization sites to limit the size of the Rh nanocrystals; (iii) the abundant N element in ZIF-8 can promote the preferential nucleation of Rh nanoparticles and ensure their uniform dispersion; (iv) Zn-rich ZIF-8 may provide extra active centers and act as a catalytic promoter for the Rh component.…”