Ultrafast Microwave Synthesis of Ru-Doped MoP with Abundant P Vacancies as the Electrocatalyst for Hydrogen Generation in a Wide pH Range

Abstract

Molybdenum phosphide (MoP) has received increasing attention for the hydrogen evolution reaction (HER) due to its Pt-like electronic structure and high electrical conductivity. In this work, a flake-like Ru-doped MoP with phosphorus vacancy (Ru-MoP-P V ) electrocatalyst is synthesized for the first time by a simple and rapid room-temperature microwave approach within 30 s. The created abundant phosphorus vacancies provide rich active sites and favor rapid electron transfer. The introduced Ru also enhances the catalytic activity of the synthesized electrocatalyst efficiently. Then, the designed Ru-MoP-P V possesses low overpotentials for HER with 79, 100, and 161 mV in 1.0 M KOH, 0.5 M H 2 SO 4 , and 1.0 M phosphatebuffered saline to obtain 10 mA cm −2 . The Ru-MoP-P V and NiFelayered double hydroxide are used as the cathode and the anode, respectively, to drive water splitting and just need a low cell voltage of 1.6 V to achieve 10 mA cm −2 . This work provides a feasible way for the rapid production of metal phosphides for energy conversion and storage applications.

Electronic interaction of ruthenium species on bimetallic phosphide for superior electrocatalytic hydrogen generation

“…This has been proven to be an effective method. [44][45][46] Nowadays, many hybrid materials are developed as electrocatalysts for HER, such as Pt-CoP, 47 Ru-Ni x P y /N-C, 48 Ir@Ni 2 P(Fe), 49 and Ir-FeP/FeOOH. 50 This research progress demonstrates that the establishment of a hybrid structure by coupling noble species with non-precious metal phosphides is feasible to realize the catalytic activity and low cost of HER.…”

Atomically dispersed platinum electrocatalysts supported on gadolinia-doped ceria nanoparticles for practical high-temperature solid oxide cells

“…5–8 The choice of support material also profoundly impacts the electrocatalytic performance, and significant research efforts have been devoted to designing the optimal support by engineering metal–support interactions. 9–14 For atomic dispersion, the combination of Pt and ceria has been widely studied. 4,15 Pt is well known for its excellent catalytic properties, and ceria is a reducible 4f oxide support that actively participates in catalytic reactions.…”

Synergistic Effects of Pyrrolic N/Pyridinic N on Ultrafast Microwave Synthesized Porous CoP/Ni2P to Boost Electrocatalytic Hydrogen Generation

“…Transition metal phosphides (TMPs) have received tremendous attention due to the Pt-like electronic structure and low price. − However, the inherent nature of low electrical conductivity and aggregated active sites and then high voltages are required to drive the electrocatalytic water-splitting. , To enhance the electrocatalytic activity of TMPs, porous structure designing, defect and heteroatom doping engineering are considered as effective strategies. − The porous structure can increase the specific surface area of the catalyst, improve the mass/electron transport efficiency, and then increase the catalytic activity. , Therefore, fabricating TMPs with porous structures is an effective approach to enhance the electrocatalytic performance. Moreover, N-doping is also a promising approach to improve the water splitting ability. , For HER, pyrrolic N can adjust the electronic structure of metal sites and promote the adsorption of H*. , Pyridinic N can prevent the adsorption of OH* to release the active sites .…”