Intensifying the Supported Ruthenium Metallic Bond to Boost the Interfacial Hydrogen Spillover Toward pH‐Universal Hydrogen Evolution Catalysis

Abstract

The effectuation of pH‐universal electrocatalysis is highly attractive but still challenging for the hydrogen evolution reaction (HER). It appeals for not only the facilitated electron transport but also the kinetical proton mass transfer. In this study, a via‐hole Ru/MoO2 confined heterostructure is profiled as a metal‐support platform for the electron/mass transfer‐boosted pH‐universal HER studies. It is indicated that the as‐formed Ru─O─Mo bridge can modulate the electronic transport at the interface, and the proton adsorption and transfer are kinetically derived by the intensified metallic Ru─Ru bond. Resultantly, the Ru/MoO2 heterostructure stably attains the Pt‐beyond HER activity with an ultralow overpotential of 9.2 mV at 10 mA cm−2 in 1 m KOH, and also achieves the competitive HER activity and stability in the acidic/neutral electrolytes. Both the experimental and computational results reveal the accelerated HER kinetics is attributable to the intensive mass transfer through the interfacial Ru→MoO2 hydrogen spillover effect. This work opens up the opportunities to rationalize the advanced metal‐support HER electrocatalysts through the interfacial hydrogen spillover effect and metallic bond engineering.

Development of Plasmonic Attapulgite/Co(Ti)Ox Nanocomposite Using Spent Batteries toward Photothermal Reduction of CO2

“…The Ti 2p spectrum can be divided into two spin-orbit peaks at BEs of 458.6 eV (Ti 2p 3/2 ) and 464.6 eV (Ti 2p 1/2 ) ( Figure 5 c), corresponding to Ti 4+ in TiO 2 . The peaks around 529.8 eV and 531.6 eV correspond to lattice oxygen and adsorbed oxygen ( Figure 5 d), respectively [ 26 , 27 ]. Notably, the content of absorbed oxygen in H-ATP/Co(Ti)O- x is higher than that of its Co(Ti)O counterpart, suggesting the existence of more oxygen vacancy [ 28 ].…”

Research progress on layered metal oxide electrocatalysts for an efficient oxygen evolution reaction

“…7,8 Currently, two primary avenues exist for hydrogen production: one involves harnessing fossil fuels to generate hydrogen, such as gas reforming, oil refining, coal gasification, and alcohol cracking, whereas the other entails green hydrogen synthesis via the electrolysis of water using electricity or photoinduced decomposition. 9–14 Conversely, electrolytic water splitting for hydrogen generation stands out for its simplicity, diversity in electrical energy sources, and myriad benefits such as heightened product purity and environmental friendliness, thus positioning itself as a promising avenue for hydrogen production. 15–17…”