Anchoring Ru nanoparticles on Ti3C2Tx for accelerated alkaline hydrogen evolution reaction: The effect of electronic metal-support interaction
Source abstract
Abstract
Electrocatalytic hydrogen evolution reaction (HER) in the alkaline media is a promising strategy for energy conversion. Nevertheless, the sluggish kinetics of alkaline HER hinders its commercial application. Electronic metal-support interaction (EMSI) is an efficient approach to regulate the electronic state of active sites and enhance the electrocatalytic HER performance. Hence, we demonstrate an efficient alkaline HER catalyst comprising Ruthenium nanoparticles (Ru NPs) homogeneously anchored on Ti 3C 2T x (Ru-Ti 3C 2T x), resulting in the formation of EMSI effect between Ru and Ti 3C 2T x. Spectroscopy characterizations and theoretical calculations demonstrate that EMSI facilitated the charge transfer from Ru NPs to Ti 3C 2T x . The regulation of local electron density on Ru NPs directly influenced hydrogen adsorption Gibbs free energy (ΔG H*), which optimized the adsorption of hydrogen intermediates (H*) on Ru NPs and promoted the formation of H 2 molecules. Therefore, the obtained 5 % Ru-Ti 3C 2T x catalyst displayed an outstanding HER performance with the overpotential of 46 mV and 60 mV at 10 and 200 mA·cm −2 in 1.0 M KOH, respectively. Furthermore, the cathode presented excellent stability during 20 h long-term measurements. This study presents some recommendations and guidance for constructing Ru-based catalysts to accelerate HER kinetics in alkaline media.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Electrocatalysts for Energy Conversion · Advanced Photocatalysis Techniques · MXene and MAX Phase Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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