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Issue 38, 2020
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Active faceted nanoporous ruthenium for electrocatalytic hydrogen evolution

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Abstract

Nanoporous ruthenium (np-Ru) comprising reaction active facets is synthesized from a ruthenium–cerium (Ru2Ce) alloy precursor. Spontaneous nanophase separation of Ru2Ce in an oxidative atmosphere results in a lamellar nanocomposite consisting of Ru metal and cerium oxide (CeO2). Selective leaching of the Ru–CeO2 nanocomposite in sulfuric acid yields np-Ru with a high surface area of 48 m2 g−1, predominantly surrounded by reaction active {10[1 with combining macron]0} facets. Active-faceted np-Ru efficiently catalyzed the hydrogen evolution reaction (HER) in acidic media at an overpotential of +74 mV vs. the reversible hydrogen electrode, which is 20 mV lower than that for carbon-supported Ru (Ru/C) and rather close to +58 mV for state-of-the-art Pt/C. Np–Ru has great potential in broad applications such as hydrogen battery electrodes because of its low HER overpotential and scalable synthetic protocol.

Graphical abstract: Active faceted nanoporous ruthenium for electrocatalytic hydrogen evolution

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Supplementary files

Article information


Submitted
20 Apr 2020
Accepted
29 Jul 2020
First published
22 Sep 2020

This article is Open Access

J. Mater. Chem. A, 2020,8, 19788-19792
Article type
Communication

Active faceted nanoporous ruthenium for electrocatalytic hydrogen evolution

A. S. B. Mohd Najib, M. Iqbal, M. B. Zakaria, S. Shoji, Y. Cho, X. Peng, S. Ueda, A. Hashimoto, T. Fujita, M. Miyauchi, Y. Yamauchi and H. Abe, J. Mater. Chem. A, 2020, 8, 19788
DOI: 10.1039/D0TA04223D

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