首页|Assembly of low-voltage driven co-production of hydrogen and sulfur via Ru nanoclusters on metal-sulfur coordination:Insights from DFT calculations
Assembly of low-voltage driven co-production of hydrogen and sulfur via Ru nanoclusters on metal-sulfur coordination:Insights from DFT calculations
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Herein,we propose a simple and rapid approach for synthesizing a CuS/Ru composite that serves as a bifunctional electrocatalyst to promote hydrogen production and concurrently convert sulfion into a value-added sulfur product.This composite comprises Ru nanoclusters supported on the CuS nanostruc-ture,achieved through simple pulsed laser irradiation in liquid approach.The optimized CuS/Ru-30 elec-trocatalyst demonstrates remarkable bifunctional electrocatalytic activity,exhibiting a negligible working potential of 0.28 V(vs.RHE)for the anodic sulfion oxidation reaction(SOR)and a minimal over-potential of 182 mV for cathodic hydrogen evolution reaction(HER)to achieve 10 mA cm-2 of current density.Moreover,the CuS/Ru-30 electrocatalyst shows exceptional selectivity for converting sulfion into valuable sulfur during anodic oxidation reactions,Remarkably,in a two-electrode electrolyzer system utilizing CuS/Ru-30 as both the anode and cathode,the SOR+HER coupled water electrolysis system demands only 0.52 V to reach 10 mA cm-2,which is considerably lesser compared to the OER+HER cou-pled water electrolysis(1.85 V).The experimental results and density function theory(DFT)calculations reveal that the strong electron interaction between CuS and Ru nanoclusters generates a built-in electric field,greatly enhancing electron transfer efficiency.This significantly boosts the HER performance and facilitates the adsorption and production of sulfur intermediates.This study presents a rapid and simple strategy for synthesizing a dual-functional catalyst suitable for low-voltage hydrogen generation while facilitating the recovery of valuable sulfur sources.
Core-Facility Center for Photochemistry & Nanomaterials,Gyeongsang National University,Jinju 52828,Gyeongsangnam-do,Republic of Korea
Department of Chemistry(BK21 FOUR),Research Institute of Natural Sciences,Gyeongsang National University,Jinju 52828,Gyeongsangnam-do,Republic of Korea
Nano-Technology Research Laboratory,Department of Chemistry,GLA University,Mathura,Uttar Pradesh 281406,India
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