Confinement and synergy effects of supported-confined bimetal catalysts with superior stability and catalytic activity  

作　　者：Yujun Sheng Farah Hazmatulhaq Abdullah Al Mahmud Mostafa S.Sayed Iftikhar Hussain Stefano Leoni Wail Al Zoubi Young Gun Ko 

机构地区：[1]Integrated Materials Chemistry Laboratory,School of Materials Science and Engineering,Yeungnam University,Gyeongsan 38541,Republic of Korea [2]School of Chemical Engineering,Yeungnam University,Gyeongsan,Gyeongbuk 38541,Republic of Korea [3]Analysis and Evaluation Department,Egyptian Petroleum Research Institute,Nasr City,Cairo 11727,Egypt [4]Department of Mechanical Engineering,City University of Hong Kong,Hong Kong 999077,China [5]Cardiff University,School of Chemistry,Cardiff CF103AT,United Kingdom

出　　处：《Journal of Energy Chemistry》2024年第12期93-99,共7页能源化学（英文版）

基　　金：supported by the National Research Foundation of Republic Korea (NRF-2022R1A2C1004392)。

摘　　要：Bimetallic nanocrystals have attracted considerable attention because of their complicated systems,which are far superior to those of their individual constituents.A TiO_(2)-confined PtMnP bimetallic catalyst(PtMnP@TiO_(2)) was prepared using an ultrasonic-assisted coincident strategy,which demonstrated exceptional catalytic activity in the universal hydrogen evolution reaction (HER).Owing to the bimetallic synergistic effect and TiO_(2) confinement,PtMnP@TiO_(x)showed ultrasmall metal nanoparticles (NPs),a higher active Pt^(0) content,adequate activation at the porous surface,and abundant acid sites.Simulations were performed to visualize the strain properties of Mn and Pt during the bending process and demonstrate the high activity of Pt.The Pt-Mn bimetallic catalysts were enriched with Pt NPs,convoyed by electron transfer from Mn to Pt.Briefly,PtMnP@TiO_(2) showed robust evolution reaction activities (an overpotential of 220 mV at a current density of 10 mA cm^(-2) and a Tafel slope of 186 mV dec^(-1))and the ability to contrast stated catalysts without ultrasonication-plasma.This protocol revealed that the geometrical and electronic effects of Pt and P surrounding the Mn species in PtMnP@TiO_(2) were crucial for increasing the catalytic activity (99%) and durability (over 20 cycles),which were far superior to those of other reported catalysts.

关 键 词：SYNERGY BIMETAL Catalyst STABILITY Activity 

分 类 号：TQ426[化学工程]