Dislocation-Activated Low Platinum-Loaded PtCu Nanoparticles Welded onto the Substrate for Practical Acidic Hydrogen Generation

Zhou, Miao; Zhao, Yang; Zhao, Xueru; Yin, Peng-Fei; Dong, Cun-Ku; Liu, Hui; Du, Xi-Wen; Yang, Jing

doi:10.1021/acsaem.4c00229

Title: Dislocation-Activated Low Platinum-Loaded PtCu Nanoparticles Welded onto the Substrate for Practical Acidic Hydrogen Generation

Journal Article · 02 May 2024 · ACS Applied Energy Materials

DOI: https://doi.org/10.1021/acsaem.4c00229 · OSTI ID:2406886

Zhou, Miao ^[1]; Zhao, Yang ^[1];

^[2]; Yin, Peng-Fei ^[1];

^[1];

^[1]

Tianjin Univ. (China)
Brookhaven National Laboratory (BNL), Upton, NY (United States)

Although transition metal (M) alloying with platinum (Pt) is a promising approach to reduce the Pt dosage required in the hydrogen evolution reaction (HER), the catalytic activity and durability of PtM alloy are often unsatisfactory for acidic HER, especially at high currents, due to a reduced number of highly active sites (Pt) at the atomic level and challenges in stabilizing them to prevent detachment and aggregation. Herein, we report a robust functional structure integrated electrode (D-PtCu/CF) with abundant edge dislocations and very low platinum content (0.1 mg cm^-2) to achieve high activity and stability in acidic HER within a proton exchange membrane water electrolysis cell (PEMWE). D-PtCu/CF exhibits high Pt mass activity (10.28 A mg_Pt^-1) and excellent operational stability (negligible decay after 200 h). X-ray absorption spectroscopy and in situ electrochemical experiments reveal that the lattice distortion caused by edge dislocations in PtCu mainly affects Pt atoms by compressing strain, reducing their ability to adsorb H. At the same time, Cu atoms are subjected to tensile strain, enhancing the bonding between Cu and H. Therefore, edge dislocations not only improve the intrinsic catalytic activity of Pt atoms but also increase the number of active sites (Cu) available for hydrogen adsorption, which synergistically accelerates the kinetics of the HER reaction. Finally, the PEMWE employing the D-PtCu/CF catalytic electrode can operate stably for 100 h at an industrial-level current density of 500 mA cm^-2 with 1.63 V.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Hydrogen Fuel Cell Technologies Office (HFTO); National Natural Science Foundation of China (NSFC)

Grant/Contract Number:: SC0012704

OSTI ID:: 2406886

Report Number(s):: BNL--225838-2024-JAAM

Journal Information:: ACS Applied Energy Materials, Journal Name: ACS Applied Energy Materials Journal Issue: 9 Vol. 7; ISSN 2574-0962

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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30 DIRECT ENERGY CONVERSION
PtCu alloy
dislocations
hydrogen evolution reaction
proton exchange membrane water electrolysis
strain effects

Title: Dislocation-Activated Low Platinum-Loaded PtCu Nanoparticles Welded onto the Substrate for Practical Acidic Hydrogen Generation

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