Palladium sulfide nanoparticles attached MoS2/nitrogen-doped graphene heterostructures for efficient oxygen reduction reaction

Covalently functionalized layered MoS2 supported Pd nanoparticles as highly active oxygen reduction electrocatalysts

“…In a more recent work, a hybrid material based on palladium sulfide (PdS) nanoparticles supported on the MoS 2 /N-doped graphene heterostructure (PdS-MoS 2 /N-G) has been developed through a two-step thermolysis process while its ORR performance was examined under alkaline conditions. 27 Markedly, the hybrid catalyst demonstrated more positive onset and half-wave potential values (−146 and −214 mV vs. SCE, respectively) as well as a greater diffusion limited current density (4.1 mA cm −2 ) than those of MoS 2 /N-G and PdS/N-G references, despite failing to surpass the commercial Pt/C catalyst. Based on these data, the current Pd NPs / f-MoS 2 hybrid is ranked among the top TMD-supported ORR electrocatalysts reported in the literature.…”

“…24 Despite the huge potential of MoS 2 as a catalyst substrate, only a few reports have been published employing MoS 2 sheets as a supporting material for metal-based catalytic nanoparticles towards the ORR. [25][26][27] Actually, the main bottlenecks that keep MoS 2 behind the scenes are related to their low conductivity and the poor dispersity and the homogeneity of the resulting hybrids. 14 Therefore, developing efficient synergistic interactions between MoS 2 sheets and noble metal nanoparticles is essential to overcome these limitations.…”

Noble-Metal-Free Multicomponent Nanointegration for Sustainable Energy Conversion

“…Although numerous efficient systems have been designed through the encapsulation of metal nanoparticles in nanocarbon frameworks for producing active-site-rich electrocatalysts, ,, multicomponent systems with nanoconfined phases and electronically tuned heterostructures are rare. Considering the distinct electronic properties of heteroatom-doped metal compounds, including metal phosphides, nitrides, sulfides, and carbides, their confinement into nanocarbon and porous carbon structures brings alterations in the metal–heteroatom coordination, local electron transfer, and interfacial adsorption of intermediate species, thus improving the catalytic performance. − On the other hand, the introduction of heteroatoms such as P and N is known to augment the density and dispersion of metal–heteroatom active sites and to enhance the surface-to-volume ratio for the promoted charge and mass transport . Guo et al reported dual-active-site Co 2 P-CoN confined in nitrogen-doped carbon nanotubes (Co 2 P@CoN@NCNTs) .…”

“…605−607 On the other hand, the introduction of heteroatoms such as P and N is known to augment the density and dispersion of metal−heteroatom active sites and to enhance the surface-to-volume ratio for the promoted charge and mass transport. 606 Guo et al reported dual-active-site Co 2 P-CoN confined in nitrogen-doped carbon nanotubes (Co 2 P@CoN@NCNTs). 607 Interactions generated at the interfaces of Co 2 P@CoN (with double Co-site synergy) and CoN@NCNTs (with Co-N-C complexes) endow a Pt-like performance to the integrated system.…”

Beads‐on‐string hierarchical structured electrocatalysts for efficient oxygen reduction reaction

“…[19][20][21] To enhance the electrocatalytic performance toward ORR, exploration of new active sites and modification of the material structures have become two main strategies. [22][23][24][25] Among them, rational design and construction of ORR electrocatalysts with heterostructures were reported to increase the surface charge density and the reactivity of active sites, 26,27 promote transport pathways of ions, 28 and lower interfacial resistances, [29][30][31][32] leading to enhanced electrocatalytic performance. Materials with different heterostructures were developed for the ORR, such as the heterostructures formed by immobilizing metallic nitride quantum dots on the surface of oxide nanosheets, 33,34 core-shell structures with the wrapping of covalent organic frameworks on the surface of a metal-organic framework (MOF), 35,36 and the heterostructures formed by dispersing and confining alloy nanoparticles within carbon substrates.…”