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. 2015 Nov 19;55(2):693–697. doi: 10.1002/anie.201509616

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© 2015 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the Creative Commons Attribution Non-Commercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

© 2015 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the Creative Commons Attribution Non-Commercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

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A) Schematic of partial oxidization on the Ni-NSA surface. B) HRTEM image and corresponding fast Fourier transformation (FFT) of a Ni nanosheet exposed in ambient atomsphere. C) HER performance of Ni/NiO-NSAs with different oxidation degree. D) HER polarization curves of Ni/NiO-NSAs, 3D porous Ni/NiO nanoparticle assembly (Ni/NiO-NPA), pure Ni foam, and commercial Pt/C (loaded on the Ni foam). Note: the loading amount of Pt/C was twice that of Ni/NiO-NSA because of the poor adhesion to the substrate.