Pd(II) functionalized vinylene-linked covalent organic frameworks for acidic electrocatalytic hydrogen evolution reaction

Novel palladium-based nanomaterials for multifunctional ORR/OER/HER electrocatalysis

“…In addition to MOF materials, other three-dimensional carbon materials could also be functionalized by noble metals to fabricate electrocatalysts. Jie-Yu Yue et al 111 constructed Pd ions supported on COF materials for application in the HER. This work developed the first Pd 2+ /COF system for HER electrocatalysis and the performance results indicated that the vinylene-linked COF platforms without a pyrolysis-free process could be a new design idea (Fig.…”

“…Morphology design is another promising strategy to design the catalysts. To increase the number of active sites and lower the costs, Daniel Ohm et al 98 used the nano-conning strategy to grow some atomically dispersed Pd/Ir islands on Au (111) and optimized the HER performance by controlling the morphology, density and size of the islands (Fig. 7e).…”

“…104 Copyright 2020, Elsevier. (e) Example STM image of a Au(111) surface after Pd displacement of Cu UPD (10 s UPD duration at 0.47 V vs. SHE). Reproduced with permission 98.…”

Pd nanoparticle-decorated covalent organic frameworks for enhanced photocatalytic tetracycline hydrochloride degradation and hydrogen evolution

“…Computational evaluations show that Pt nanoparticles have Δ G H* of −0.09 eV, which is consistent with the literature reports. Pristine COFs display a highly negative Δ G H* of −2.05 eV, indicating strong chemical adsorption of protons; 24 contrastively, Au, Co and Pd nanoparticles show Δ G H* of 0.30, −0.27 and −0.14 eV, respectively. All their absolute values are all higher than that of Pt, meaning thermodynamically inferior activity for hydrogen evolution compared to Pt.…”

“…1d) is 0.223 nm, corresponding to the (111) facet of Pd. 24 Scanning transmission electron microscopy elemental mapping (STEM at an accelerating voltage of 300 kV, Fig. 1e) exhibits the even distribution of Pd nanoparticles in the Pd-COFs.…”