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Johannes Novak Hansen, Hèctor Prats, Karl Krøjer Toudahl, Niklas Mørch Secher, Karen Chan, Jakob Kibsgaard, Ib Chorkendorff
High Resolution Image Download MS PowerPoint Slide The search for cheap and abundant alternatives to Pt for the hydrogen evolution reaction (HER) has led to many efforts to develop new catalysts. Although the discovery of promising catalysts is often reported, none can compete with Pt in intrinsic activity. To enable true progress, a rigorous assessment of intrinsic catalytic activity is needed, in addition to minimizing mass-transport limitations and following best practices for measurements. Herein, we underline the importance of measuring intrinsic catalytic activities, e.g., turnover frequencies (TOFs). Using mass-selected, identical Pt nanoparticles at a range of loadings, we show the pervasive impact of mass-transport limitations on the observed activity of Pt in acid. We present the highest TOF measured for Pt at room temperature. Since our measurements are still limited by mass transport, the true intrinsic HER activity for Pt in acid is still unknown. Using a numerical diffusion model, we suggest that hysteresis in cyclic voltammograms arises from H 2 oversaturation, which is another indicator of mass-transport limitations.
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Hansen, J. N., Prats, H., Toudahl, K. K., Secher, N. M., Chan, K., Kibsgaard, J., & Chorkendorff, I. (2021). Is There Anything Better than Pt for HER? ACS Energy Letters, 6(4), 1175–1180. https://doi.org/10.1021/acsenergylett.1c00246
Hansen, Johannes Novak, et al. "Is There Anything Better than Pt for HER?" ACS Energy Letters, vol. 6, no. 4, 2021, pp. 1175–1180, https://doi.org/10.1021/acsenergylett.1c00246.
Hansen, Johannes Novak, Hèctor Prats, Karl Krøjer Toudahl, Niklas Mørch Secher, Karen Chan, Jakob Kibsgaard, and Ib Chorkendorff. "Is There Anything Better than Pt for HER?" ACS Energy Letters 6, no. 4 (2021): 1175–1180. https://doi.org/10.1021/acsenergylett.1c00246.
Hansen J. N., Prats H., Toudahl K. K. [и др.] Is There Anything Better than Pt for HER? // ACS Energy Letters. — 2021. — Vol. 6, № 4. — P. 1175–1180. — URL: https://doi.org/10.1021/acsenergylett.1c00246
@article{hansen2021there,
title = {{Is There Anything Better than Pt for HER?}},
author = {Johannes Novak Hansen and Hèctor Prats and Karl Krøjer Toudahl and Niklas Mørch Secher and Karen Chan and Jakob Kibsgaard and Ib Chorkendorff},
journal = {ACS Energy Letters},
year = {2021},
volume = {6},
number = {4},
pages = {1175--1180},
doi = {10.1021/acsenergylett.1c00246},
url = {https://doi.org/10.1021/acsenergylett.1c00246}
}TY - JOUR AU - Hansen, Johannes Novak AU - Prats, Hèctor AU - Toudahl, Karl Krøjer AU - Secher, Niklas Mørch AU - Chan, Karen AU - Kibsgaard, Jakob AU - Chorkendorff, Ib TI - Is There Anything Better than Pt for HER? JO - ACS Energy Letters VL - 6 IS - 4 SP - 1175 EP - 1180 PY - 2021 DA - 2021/03/19 DO - 10.1021/acsenergylett.1c00246 UR - https://doi.org/10.1021/acsenergylett.1c00246 ER -
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