Ultrahigh Mass Activity for the Hydrogen Evolution Reaction by Anchoring Platinum Single Atoms on Active {100} Facets of TiC via Cation Defect Engineering

Qinghua Dong; Sugang Ma; Jiuyi ZhuFen YueYuqi GengJie ZhengYu GeChuanlin FanHuigang ZhangMaoqiao XiangQingshan Zhu

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Ultrahigh Mass Activity for the Hydrogen Evolution Reaction by Anchoring Platinum Single Atoms on Active {100} Facets of TiC via Cation Defect Engineering

机译：Ultrahigh Mass Activity for the Hydrogen Evolution Reaction by Anchoring Platinum Single Atoms on Active {100} Facets of TiC via Cation Defect Engineering

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Improving the platinum (Pt) mass activity for low-cost electrochemicalhydrogen evolution is an important and arduous task. Here, a selectiveetching-reducing fluidized bed reactor technique is reported to create Tivacancies and firmly anchor single Pt atoms on the active {100} facets oftitanium carbide (TiC) to increase the Pt utilization efficiency and improvecatalytic activity significantly by a synergistic effect between Ti vacancies andPt atoms. The generated Ti vacancies are negatively charged and stabilizePt atoms by forming covalent PtC bonds, showing excellent long-termdurability. Pt single atoms (ultralow load of 1.2 μg cm~(?2)) on the defective TiC{100} show remarkable activity (24.9 mV at 10 mA cm~(?2)) and a mass activity(49.69 A mg~(?1)) ≈190 times that of the state-of-the-art Pt-C catalyst and nearlydouble the previously reported best values. The developed cation defect engineeringexhibits excellent potential for fabricating next-generation advancedsingle-atom catalysts for large-scale hydrogen evolution at a low cost.

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来源
《Advanced functional materials》 |2023年第3期|2210665.1-2210665.10|共10页
作者
Qinghua Dong; Sugang Ma; Jiuyi ZhuFen YueYuqi GengJie ZhengYu GeChuanlin FanHuigang ZhangMaoqiao XiangQingshan Zhu;
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State Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190, China;

State Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190, China, School of Chemical EngineeringUniversity of the Chinese Academy of SciencesBeijing 100049, China;

State Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190, China, School of Chemical EngineeringUniversity of the Chinese Academy of SciencesBeijing 100049, China, Innovation Academy for Gr;

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正文语种英语
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cation titanium defect; fluidized bed reactor; hydrogen evolution reactions; platinum single atoms; ultrahigh mass activity;

Ultrahigh Mass Activity for the Hydrogen Evolution Reaction by Anchoring Platinum Single Atoms on Active {100} Facets of TiC via Cation Defect Engineering

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