Atomically Thin Holey Two-Dimensional Ru₂P Nanosheets for Enhanced Hydrogen Evolution Electrocatalysis

Abstract

The defect engineering of low-dimensional nanostructured materials has led to increased scientific efforts owing to their high efficiency concerning high-performance electrocatalysts that play a crucial role in renewable energy technologies. Herein, we report an efficient methodology for fabricating atomically thin, holey metal-phosphide nanosheets with excellent electrocatalyst functionality. Two-dimensional, subnanometer-thick, holey Ru2P nanosheets containing crystal defects were synthesized via the phosphidation of monolayer RuO2 nanosheets. Holey Ru2P nanosheets exhibited superior electrocatalytic activity for the hydrogen evolution reaction (HER) compared to that exhibited by nonholey Ru2P nanoparticles. Further, holey Ru2P nanosheets exhibited overpotentials of 17 and 26 mV in acidic and alkaline electrolytes, respectively. Thus, they are among the best-performing Ru–P-based HER catalysts reported to date. In situ spectroscopic investigations indicated that the holey nanosheet morphology enhanced the accumulation of surface hydrogen through the adsorption of protons and/or water, resulting in an increased contribution of the Volmer–Tafel mechanism toward the exceptional HER activity of these ultrathin electrocatalysts.

Modulation of Electron Structure and Dehydrogenation Kinetics of Nickel Phosphide for Hydrazine‐Assisted Self‐Powered Hydrogen Production in Seawater

“…[ 27 ] As for P 2p, peaks at 130.5 and 129.1 eV are from P 2p 1/2 and P 2p 3/2 , and P–O species at 134.7 eV originate from surface oxidation (Figure 2f). [ 34,35 ] Ni 2 P@MNF control sample displays similar peaks compared with Mo‐Ni 2 P@MNF but shift negatively, indicating the electron effect between Mo and P after the introduction of Mo dopants.…”

Phytic Acid-Modulated Ru Catalyzes Regioselective Deuteration of 1,6-Hexamethylenediamine

“…For instance, in the P 2p spectra of Ru/PA–PANI-600, the peaks of P p 3/2 and P p 1/2 located at 130.8 and 131.7 eV correspond to the P–Ru structure, while the peak at 134.2 eV is attributed to the PO species in the phosphate groups of PA. ,, Conversely, in the P 2p spectra of Ru/NPC-500 and Ru/NPC-600 (Figures S4a and e), there is only one peak at 133.2 eV, which is assigned to the P–O–Ru structure. ,, However, as the cracking temperature was increased to 700 °C, the peaks of P p 3/2 and P p1 /2 located at 129.5 and 130.5 eV correspond to the P–Ru structure, and the peak at 133.2 eV is assigned to the P–O–Ru structure, as shown in Figure S4b. Similarly, in Ru/NPC-800, the peaks of P p 3/2 and P p 1/2 gradually red-shift to 130 and 130.9 eV for the P–Ru structure, and the P–O–Ru structure is located at 133.4 eV. − Unfortunately, the oxygen spectra do not show the electronic change process of P-regulated Ru, probably due to the excessive number of oxygen intermediates formed during the cleavage process, which is difficult to distinguish in Figure f.…”

Boosting Photocatalytic Hydrogen Evolution Activity by Accelerating Water Dissociation over Rh/Zn(OH)2 Catalyst in Alkaline Solution

“…The goal is to achieve high-performance HER in alkaline solutions, thus replacing precious metal catalysts. The transition metal derivatives, such as transition metal oxides, , transition metal sulfides, , transition metal hydroxides, , transition metal carbides, − and metal phosphides, , are considered to have potential for alkaline HER as they exhibit favorable water absorption, resulting in Pt-comparable activity. Based on their exciting activity and durability for HER, it is fair to develop an extremely facile and cost-effective system for solar-to-H 2 energy conversion.…”