Dealloying layered PdBi₂ nanoflakes to palladium hydride leads to enhanced electrocatalytic N₂ reduction

Abstract

Electrochemical catalysis of nitrogen to ammonia is an environmentally friendly alternative strategy to the traditional and damaging Haber-Bosch process. Nevertheless, it is limited by a low ammonia yield and Faradaic...

Defect Engineering in Two-Dimensional Layered PdTe2 for Enhanced Hydrogen Evolution Reaction

“…The HER performance of all samples was investigated in 0.5 M H 2 SO 4 . As shown in the CV scanning curves (Figure a), the pristine PdTe 2 shows three oxidation peaks at approximately 0.60, 0.76, and 0.82 V. These are most likely associated with the oxidation of Te, which has the tendency to oxidize quite easily, rather than Pd to PdO, as palladium is already in its maximal typical oxidation state (Pd IV ). Based on previous reports, the first peak is most likely associated with the oxidation of Te –II to Te 0 , followed by the oxidation of Te 0 to Te n+ . , The presence of two oxidation peaks at higher potentials could be ascribed to either oxidation of edge planes and basal planes or the formation of non-stoichiometric sub-oxides of Te.…”

“…For the Te 3d spectrum of PdTe 2 , the peaks centered at 527.8, 574.5, 583.2, and 584.7 eV are The HER performance of all samples was investigated in 0.5 M H 2 SO 4 . As shown in the CV scanning curves (Figure 5a), the pristine PdTe 2 shows three oxidation peaks at approximately 0.60, 0.76, and 0.82 V. These are most likely associated with the oxidation of Te, which has the tendency to oxidize quite easily, rather than Pd to PdO, 44 as palladium is already in its maximal typical oxidation state (Pd IV ). Based on previous reports, the first peak is most likely associated with the oxidation of Te −II to Te 0 , followed by the oxidation of Te 0 to Te n+ .…”

Atomic-layered V2C MXene containing bismuth elements: 2D/0D and 2D/2D nanoarchitectonics for hydrogen evolution and nitrogen reduction reaction

“…A specific amount of ammonia (NH 3 ) produced in the acid trap was measured by HI83300 multi-parameter photometer (Hanna Instruments, Woonsocket, Rhode Island, USA). The ASTM D1426 Nessler method which has been noted in the previous report, 26 was adopted to determine the concentration of produced NH 3 . Briefly, a cuvette filled with 10 mL of unreacted sample was placed in the photometer to obtain the background signal.…”

“…24 The density functional theory (DFT) calculation also has proved that in Bi-based catalysts, the density state near the Fermi level is mainly localized around the Bi atoms, indicating the ability of Bi to serve as active sites to donate p-electrons and thus activate N 2 . 25 Currently, promising advances have been achieved for the NRR on Bi-based electrocatalysts including Bi nanosheets, 24 2D mosaic Bi nanosheets, 25 PdBi 2 nanoflakes, 26 and bismuthene nanostructures. 27 However, the NRR performance of the reported Bi-based materials is still limited due to their poor electrical conductivity.…”

Liquid Phase Isolation of SnS Monolayers with Enhanced Optoelectronic Properties

“…Since the successful isolation of graphene, the isolation of beyond-graphene materials, such as boron nitride (BN), MMCs, transition metal dichalcogenides (TMDs), transition metal trichalcogenides, ternary bismuth telluride halides, and phosphorene, has opened up a new horizon in 2D materials research. [1][2][3][4] Among them, the isolation of single layers of anisotropic 2D materials has been a major challenge, providing unique opportunities for fundamental physical insights and novel nanoelectronic device applications. [5][6][7][8][9][10] In particular, the MMCs with chemical formula MX (M = Ge, Sn, and so on, and X = S, Se) have gained considerable attention due to their peculiar intrinsic physical properties at the single atomic layer.…”