Partially reduced Ru/RuO₂composites as efficient and pH-universal electrocatalysts for hydrogen evolution

Abstract

Ru/RuO2 composites with unique metal/metal oxide interface are proposed and work to pursue efficient HER performance in pH-universal media.

Synergic Reaction Kinetics over Adjacent Ruthenium Sites for Superb Hydrogen Generation in Alkaline Media

“…Some recent works have demonstrated that regulating the electronic structure of Ru by establishing proper heterostructures could bring the optimized bonding strengths of OH and H in alkaline HER. [20][21][22][23] However, achieving favorable H 2 O dissociation, moderate H bonding strength, and reduced OH bonding strength simultaneously on Ru-based electrocatalysts for high alkaline HER performance is still challenging.In this work, the defective carbon-supported Ru nanoparticles with neighboring Ru single atoms (recorded as Ru 1,n -NC) was reported as a superb electrocatalyst for alkaline HER. Both experimental analysis and density functional theory (DFT) calculations confirmed the mutual kinetics promotions Ruthenium (Ru)-based electrocatalysts as platinum (Pt) alternatives in catalyzing hydrogen evolution reaction (HER) are promising.…”

“…Some recent works have demonstrated that regulating the electronic structure of Ru by establishing proper heterostructures could bring the optimized bonding strengths of OH and H in alkaline HER. [20][21][22][23] However, achieving favorable H 2 O dissociation, moderate H bonding strength, and reduced OH bonding strength simultaneously on Ru-based electrocatalysts for high alkaline HER performance is still challenging.…”

A Self‐Reconstructed Bifunctional Electrocatalyst of Pseudo‐Amorphous Nickel Carbide @ Iron Oxide Network for Seawater Splitting

“…The OER performance of LOM is highly correlated with pH because its RLS is the deprotonation of hydroxyl groups, and the p K a of the surface deprotonation eventually leads to a pH‐dependence. [ 58 , 59 ] While the conventional AEM is composed of four concerted proton–electron transfer steps on surface metal centers, yielding pH‐independent activity at the RHE scale. [ 60 , 61 ] As presented in Figure 8e , the onset potential of NiFe‐PBA‐gel‐cal decreases with increasing pH, indicating the underlying LOM pathway.…”

“…The OER performance of LOM is highly correlated with pH because its RLS is the deprotonation of hydroxyl groups, and the pK a of the surface deprotonation eventually leads to a pH-dependence. [58,59] While the conventional AEM is composed of four concerted protonelectron transfer steps on surface metal centers, yielding pHindependent activity at the RHE scale. [60,61] As presented in ) species are produced on the surface of catalyst in LOM, which specifically interact with tetramethylammonium cation (TMA + ), and thus tetramethylammonium hydroxide (TMAOH) was used to replace KOH as the electrolyte to confirm the reaction mechanism.…”

Rational Regulation of Crystalline/Amorphous Microprisms‐Nanochannels Based on Molecular Sieve (VSB‐5) for Electrochemical Overall Water Splitting

“…[2,3] Electrochemical water splitting is a promising avenue for the sustainable production of high-purity H 2 , involving hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). [4,5] However, the high energy barriers , and water molecules bound directly to octahedrally coordinated Ni 2+ , displaying large and unidimensional 24-ring channels. [24] These unique nanochannels facilitate exposing abundant active sites and shortening the diffusion pathways of mass transport.…”