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Considerations for the scaling-up of water splitting catalysts

A wealth of candidates are being investigated to improve the catalysts found in acidic and alkaline electrolysers. However, attention should be focused on developing stable water oxidation catalysts with improved intrinsic activity — not only increased geometric activity — alongside best practice for data collection.

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Fig. 1: Comparison of mass activity and overpotential for hydrogen evolution catalysts.
Fig. 2: Comparison of mass activity and overpotential for oxygen evolution catalysts.


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The work was supported by a research grant (9455) from VILLUM FONDEN. This project has received funding from the European Research Council (ERC) under the European 4783 Union’s Horizon 2020 research and innovation programme (grant agreement no. 741860).

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Correspondence to Jakob Kibsgaard or Ib Chorkendorff.

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Kibsgaard, J., Chorkendorff, I. Considerations for the scaling-up of water splitting catalysts. Nat Energy 4, 430–433 (2019).

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