Electrochemically Grown Ultrathin Platinum Nanosheet Electrodes with Ultralow Loadings for Energy-Saving and Industrial-Level Hydrogen Evolution

Ding, Lei; Xie, Zhiqiang; Yu, Shule; Wang, Weitian; Terekhov, Alexander Y.; Canfield, Brian K.; Capuano, Christopher B.; Keane, Alex; Ayers, Kathy; Cullen, David A.; Zhang, Feng-Yuan

doi:10.1007/s40820-023-01117-2

Title: Electrochemically Grown Ultrathin Platinum Nanosheet Electrodes with Ultralow Loadings for Energy-Saving and Industrial-Level Hydrogen Evolution

Journal Article · Sat Jun 03 00:00:00 EDT 2023 · Nano-Micro Letters

DOI:https://doi.org/10.1007/s40820-023-01117-2· OSTI ID:1987774

Ding, Lei ^[1]; Xie, Zhiqiang ^[1]; Yu, Shule ^[1]; Wang, Weitian ^[1]; Terekhov, Alexander Y. ^[1]; Canfield, Brian K. ^[1]; Capuano, Christopher B. ^[2]; Keane, Alex ^[2]; Ayers, Kathy ^[2]; Cullen, David A. ^[3];

^[1]

University of Tennessee, Knoxville, TN (United States)
Nel Hydrogen, Wallingford, CT (United States)
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)

Nanostructured catalyst-integrated electrodes with remarkably reduced catalyst loadings, high catalyst utilization and facile fabrication are urgently needed to enable cost-effective, green hydrogen production via proton exchange membrane electrolyzer cells (PEMECs). Herein, benefitting from a thin seeding layer, bottom-up grown ultrathin Pt nanosheets (Pt-NSs) were first deposited on thin Ti substrates for PEMECs via a fast, template- and surfactant-free electrochemical growth process at room temperature, showing highly uniform Pt surface coverage with ultralow loadings and vertically well-aligned nanosheet morphologies. Combined with an anode-only Nafion 117 catalyst-coated membrane (CCM), the Pt-NS electrode with an ultralow loading of 0.015 mg_Ptcm^-2 demonstrates superior cell performance to the commercial CCM (3.0 mg_Pt cm^-2), achieving 99.5% catalyst savings and more than 237-fold higher catalyst utilization. The remarkable performance with high catalyst utilization is mainly due to the vertically well-aligned ultrathin nanosheets with good surface coverage exposing abundant active sites for the electrochemical reaction. Overall, this study not only paves a new way for optimizing the catalyst uniformity and surface coverage with ultralow loadings but also provides new insights into nanostructured electrode design and facile fabrication for highly efficient and low-cost PEMECs and other energy storage/conversion devices.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE); Transportation. Hydrogen Fuel Cell Technologies Office (HFTO); USDOE Office of Science (SC)

Grant/Contract Number:: AC05-00OR22725; EE0008426; EE0008423; FE0011585

OSTI ID:: 1987774

Journal Information:: Nano-Micro Letters, Vol. 15, Issue 1; ISSN 2311-6706

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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seeding layer
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ultralow loadings
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Title: Electrochemically Grown Ultrathin Platinum Nanosheet Electrodes with Ultralow Loadings for Energy-Saving and Industrial-Level Hydrogen Evolution

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