Electronic Modulation of Pt Nanoparticles on Ni 3 N-Mo 2 C by Support-Induced Strategy for Accelerating Hydrogen Oxidation and Evolution.
Yuting YangQiumei DaiLuyan ShiYi LiuTayirjan Taylor IsimjanXiulin YangPublished in: The journal of physical chemistry letters (2022)
Electrochemical energy conversion and storage through hydrogen has revolutionized sustainable energy systems using fuel cells and electrolyzers. Regrettably, the sluggish alkaline hydrogen oxidation reaction (HOR) hampers advances in fuel cells. Herein, we report a Pt/Ni 3 N-Mo 2 C bifunctional electrocatalyst toward HOR and hydrogen evolution reaction (HER). The Pt/Ni 3 N-Mo 2 C exhibits remarkable HOR/HER performance in alkaline media. The mass activity at 50 mV and exchange current density of HOR are 5.1 and 1.5 times that of commercial Pt/C, respectively. Moreover, it possesses an impressive HER activity with an overpotential of 11 mV @ 10 mA cm -2 , which is lower than that of Pt/C and most reported electrocatalysts under the same conditions. Density functional theory (DFT) calculations combined with experimental results reveal that Pt/Ni 3 N-Mo 2 C not only possesses an optimal balance between hydrogen binding energy (HBE) and OH - adsorption but also facilitates water adsorption and dissociation on the catalyst surface, which contribute to the excellent HOR/HER performance. Thus, this work may guide bifunctional HOR/HER catalyst design in the conversion and transport of energy.
Keyphrases
- density functional theory
- metal organic framework
- visible light
- induced apoptosis
- molecular dynamics
- electron transfer
- highly efficient
- cell cycle arrest
- ionic liquid
- room temperature
- hydrogen peroxide
- gene expression
- nitric oxide
- cell death
- single cell
- mass spectrometry
- reduced graphene oxide
- drug induced
- endoplasmic reticulum stress
- oxidative stress
- transition metal
- transcription factor
- high resolution
- dna methylation
- dna binding