N-induced lattice contraction generally boosts the hydrogen evolution catalysis of P-rich metal phosphides

Abstract

The HER activities of P-rich transition metal phosphides can be substantially boosted by N-induced lattice contraction.

A Single Molecular Stoichiometric P‐Source for Phase‐Selective Synthesis of Crystalline and Amorphous Iron Phosphide Nanocatalysts

“…In particular, the electrochemically active surface area of all the nanoparticles should be quantified by further investigation, in order to compare the catalysts based on a similar number of active sites. Besides, as suggested by a recent work on phosphorus-rich phosphides, [13] characterizing the adsorption strength of H species on the amorphous vs.…”

“…In the past decades, transition metal phosphides have raised huge interest as promising nanomaterials. [1,2] They outperform their corresponding metal nanoparticles with respect to physical phenomena such as magnetism [3] or optics, [4] and show superior properties in applications relevant to energy storage, [5][6][7] and catalysis, [8][9][10][11][12][13][14][15] including water splitting. [16,17] In particular, Fe x P nanoparticles are among the most active catalysts containing an earthabundant metal to mediate the Hydrogen Evolution Reaction (HER) in acidic, [8,[18][19][20][21] neutral, [8] or basic media.…”

An Efficient Turing‐Type Ag2Se‐CoSe2 Multi‐Interfacial Oxygen‐Evolving Electrocatalyst**

“…Ap lot of the electron density difference (Figure 5b) displays that the donation of electrons from the Ag 2 Se to nearby Co sites occurs at the interface,w hich permits e gorbital occupancyo fC oc loser to unity and thus enhanced OER activity, [31,36] matching well with our XANES measurements.M oreover,t he calculated projected density of states (PDOS;F igure 5c)shows that the d-band center of Co atom in Ag 2 Se-CoOOH deviates more from the Fermi level than that of single CoOOH (01-12), further evidencing the weak binding of *OH intermediate on the Ag 2 Se-CoOOH interfaces. [38] We also computed the OH binding energies of CoOOH and Ag 2 Se-CoOOH for comparison. Results in Figure 5d uncover ag reatly weakened OH adsorption on the interface sites.Moreover,our calculations further predict that the Co À Obond length increases from 1.763 to 1.882 on the Ag 2 Se-CoOOH interface (Insets in Figure 5d), again evidencing the weaker *OH adsorption on Ag 2 Se-CoOOH interface relative to CoOOH.…”

N-modulated Cu+ for efficient electrochemical carbon monoxide reduction to acetate

“…High-resolution TEM (HRTEM) results showed that the inter-planar spacing of N-Cu is 2.166 Å, slightly larger than that (2.113 Å) of commercial Cu (Com-Cu). As the N anion possesses a larger ionic radius than Cu ion, the insertion of N may cause the lattice expansion [35]. These structural distortions were further validated by the powder Xray diffraction (XRD).…”