Ru–W Pair Sites Enabling the Ensemble Catalysis for Efficient Hydrogen Evolution

Abstract

Simultaneously optimizing elementary steps, such as water dissociation, hydroxyl transferring, and hydrogen combination, is crucial yet challenging for achieving efficient hydrogen evolution reaction (HER) in alkaline media. Herein, Ru single atom‐doped WO2 nanoparticles with atomically dispersed Ru–W pair sites (Ru–W/WO2‐800) are developed using a crystalline lattice‐confined strategy, aiming to gain efficient alkaline HER. It is found that Ru–W/WO2‐800 exhibits remarkable HER activity, characterized by a low overpotential (11 mV at 10 mA cm−2), notable mass activity (5863 mA mg−1 Ru at 50 mV), and robust stability (500 h at 250 mA cm−2). The highly efficient activity of Ru–W/WO2‐800 is attributed to the synergistic effect of Ru–W sites through ensemble catalysis. Specifically, the W sites expedite rapid hydroxyl transferring and water dissociation, while the Ru sites accelerate the hydrogen combination process, synergistically facilitating the HER activity. This study opens a promising pathway for tailoring the coordination environment of atomic‐scale catalysts to achieve efficient electro‐catalysis.

Regulating Hydrogen/Oxygen Species Adsorption via Built‐in Electric Field ‐Driven Electron Transfer Behavior at the Heterointerface for Efficient Water Splitting

“…The elongated bond length of MoÀ W (2.96 Å) for WC 1-x /Mo 2 C@CNF relative to that of WÀ W (2.89 Å) in WC 1-x @CNF indicated the interaction between WC 1-x and Mo 2 C (Figure 2g and Figure S8), the high intensity of WÀ W bond highlights the excellent conductivity of both catalysts. [20] Furthermore, the wavelet transforms (WT)-EXAFS also confirms the phenomenon visualized in Figure 2h. The WC 1-x /Mo 2 C@CNF presents decreased coordination numbers of WÀ W after Mo 2 C incorporation (Table S2).…”

Constructing plasmonic electron acceptors on TiO2 for full-spectrum-driven photocatalytic hydrogen generation

“…Photocatalytic water splitting to produce hydrogen has been considered as one of most attractive avenues to alleviate both energy shortage and environmental issues. 1–9 Since the first discovery of photoelectrochemical water splitting on n-type TiO 2 electrodes, numerous semiconductors have been proven to work for hydrogen evolution. 9–16 However, the development of traditional semiconductors as photocatalysts suffers from their limited light harvesting and utilization.…”

N-Coordinated Iridium–Molybdenum Dual-Atom Catalysts Enabling Efficient Bifunctional Hydrogen Electrocatalysis

“…However, the sluggish kinetics of these electrode processes necessitate the use of electrocatalysts to enhance their conversion efficiencies. , Therefore, extensive efforts have been dedicated to exploring affordable, efficient, and durable catalysts for hydrogen production and its various applications. Recently, nonprecious metal-based catalysts, including carbides, , nitrides, , dichalcogenides, − phosphides, , and oxides, , are exploited for HER and HOR. However, their activities and stabilities in these reactions still fall short of satisfactory levels .…”