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

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

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Bimetallic nanocrystals have attracted considerable attention because of their complicated systems,which are far superior to those of their individual constituents.A TiO2-confined PtMnP bimetallic catalyst(PtMnP@TiO2)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 TiO2 confinement,PtMnP@TiOx showed ultrasmall metal nanoparticles(NPs),a higher active Pt0 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,con-voyed by electron transfer from Mn to Pt.Briefly,PtMnP@TiO2 showed robust evolution reaction activi-ties(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@TiO2 were crucial for increasing the catalytic activity(99％)and durability(over 20 cycles),which were far superior to those of other reported catalysts.

SynergyBimetalCatalystStabilityActivity

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

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Integrated Materials Chemistry Laboratory,School of Materials Science and Engineering,Yeungnam University,Gyeongsan 38541,Republic of Korea

School of Chemical Engineering,Yeungnam University,Gyeongsan,Gyeongbuk 38541,Republic of Korea

Analysis and Evaluation Department,Egyptian Petroleum Research Institute,Nasr City,Cairo 11727,Egypt

Department of Mechanical Engineering,City University of Hong Kong,Hong Kong 999077,China

Cardiff University,School of Chemistry,Cardiff CF10 3AT,United Kingdom

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2024

10.1016/j.jechem.2024.07.022

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.99(12)