Active faceted nanoporous ruthenium for electrocatalytic hydrogen evolution

Abdillah Sani Bin Mohd Najib; Muhammad Iqbal; Mohamed Barakat Zakaria; Shusaku Shoji; Yohei Cho; Xiaobo Peng; Shigenori Ueda; Ayako Hashimoto; Takeshi Fujita; Masahiro Miyauchi; Yusuke Yamauchi; Hideki Abe

doi:10.1039/D0TA04223D

Active faceted nanoporous ruthenium for electrocatalytic hydrogen evolution†

Abdillah Sani Bin Mohd Najib,

^abc Muhammad Iqbal,

^b Mohamed Barakat Zakaria,

^d Shusaku Shoji,^e Yohei Cho,^e Xiaobo Peng,

^b Shigenori Ueda,

^fg Ayako Hashimoto,

^g Takeshi Fujita,

^h Masahiro Miyauchi,

^e Yusuke Yamauchi

*^di and Hideki Abe

*^ab

Author affiliations

* Corresponding authors

^a Graduate School of Science and Technology, Saitama University, Shimo-Okubo 255, Saitama 338-8570, Japan
E-mail: BE.Hideki@Anims.go.jp

^b National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan

^c School of Mechanical engineering, Faculty of engineering, Universiti Teknologi Malaysia, Skudai, Johor Bahru, Malaysia

^d Australian Institute for Bioengineering, Nanotechnology (AIBN) and School of Chemical Engineering, The University of Queensland, Brisbane, QLD, Australia
E-mail: y.yamauchi@uq.edu.au

^e Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, Ookayama 2-12-1, Meguro-ku, Tokyo 152-8552, Japan

^f Synchrotron X-ray Station at SPring-8, National Institute for Materials Science, 1-1-1 Kouto, Sayo, Hyogo, Japan

^g National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki, Japan

^h School of Environmental Science and Engineering, Kochi University of Technology, 185 Miyanokuchi, Tosayamada, Kami City, Kochi 782-8502, Japan

ⁱ Department of Plant & Environmental New Resources, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, South Korea

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.

Journal of Materials Chemistry A

Active faceted nanoporous ruthenium for electrocatalytic hydrogen evolution†

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