In direct ethylene glycol fuel cells,advanced anodic electrocatalysts are urgently required to achieve high energy efficiency and optimal fuel utilization for complete ethylene glycol electrooxidation.In this work,bim...In direct ethylene glycol fuel cells,advanced anodic electrocatalysts are urgently required to achieve high energy efficiency and optimal fuel utilization for complete ethylene glycol electrooxidation.In this work,bimetallic PtRh nanodendrites(PtRh NDs)with a three-dimensionally self-supporting structure,abundant(100)crystal facets,and numerous Pt/Rh active sites are synthesized using a simple wet chemical reduction method.The as-synthesized PtRh NDs exhibit outstanding electrocatalytic activity and remarkable selectivity for the ethylene glycol oxidation reaction(EGOR)in alkaline media,significantly enhancing the utilization of ethylene glycol fuel in fuel cells.Theoretical calculations demonstrate that the exposure of(100)crystal faces and the incorporation of Rh atoms play crucial roles in improving the activity and selectivity of EGOR.The present work not only provides an effective method for the synthesis of PtRh NDs with rich(100)crystal faces but also provides new insights into the synergistic effects between the crystal faces and the components in the electrocata lytic process.展开更多
基金sponsored by the National Natural Science Foundation of China(22272103)the Programs of Science and Technology of Suzhou in China(ZXL2021448 and SYG202137)+4 种基金Science and Technology Innovation Team of Shaanxi Province(2022TD-35 and 2023-CX-TD-27)the Young Scientist Initiative Project of School of Materials Science and Engineering at Shaanxi Normal University(2024YSIP-MSE-SNNU004)the Fundamental Research Funds for the Central Universities(GK202505036)the Technology Innovation Leading Program of Shaanxi in ChinaSanqin Scholars Innovation Teams in Shaanxi Province in China。
文摘In direct ethylene glycol fuel cells,advanced anodic electrocatalysts are urgently required to achieve high energy efficiency and optimal fuel utilization for complete ethylene glycol electrooxidation.In this work,bimetallic PtRh nanodendrites(PtRh NDs)with a three-dimensionally self-supporting structure,abundant(100)crystal facets,and numerous Pt/Rh active sites are synthesized using a simple wet chemical reduction method.The as-synthesized PtRh NDs exhibit outstanding electrocatalytic activity and remarkable selectivity for the ethylene glycol oxidation reaction(EGOR)in alkaline media,significantly enhancing the utilization of ethylene glycol fuel in fuel cells.Theoretical calculations demonstrate that the exposure of(100)crystal faces and the incorporation of Rh atoms play crucial roles in improving the activity and selectivity of EGOR.The present work not only provides an effective method for the synthesis of PtRh NDs with rich(100)crystal faces but also provides new insights into the synergistic effects between the crystal faces and the components in the electrocata lytic process.
