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. 2022 Oct 31;13:6521. doi: 10.1038/s41467-022-34037-7

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© The Author(s) 2022

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 6 — RDE mass activity (a), and specific activity (b) of the STG-assisted Pt-IMCs catalysts and TKK-30 wt% Pt/C. The Pt loading in RDE tests were in the range of 11~13 µg cm^–2. c Correlation between specific activity and calculated surface strain of the five L1₀ PtM catalysts and Pt/C. The error bars in a, b, and c were obtained after three parallel experiments. d Mass activity loss of the MEAs made with cathode catalysts of STG-assisted PtCo, Umic-30 wt% PtCo, TKK-30 wt% Pt/C, and TKK-30 wt% Pt/C-700 after 30,000 cycles’ ADT. e H₂-air polarization curves and power density plots of the MEAs made with cathode catalysts of STG-assisted PtCo, Umic-30 wt% PtCo, TKK-30 wt% Pt/C, and TKK-30 wt% Pt/C-700. For all MEA, the cathode and anode loadings were controlled to be 0.1 and 0.025 mg_Pt cm^–2, respectively. Test conditions: 80 °C, 100% RH, 150 kPa_abs, outlet H₂-air at high stoichiometries (H₂ and air flow rates were fixed at 0.5 and 2.0 L min^–1, respectively). f Voltage loss at 0.8 A cm^–2 of the MEAs made with cathode catalysts of STG-assisted PtCo, Umic-30 wt% PtCo, TKK-30 wt% Pt/C, and TKK-30 wt% Pt/C-700 after 30,000 cycles’ ADT.