Active faceted nanoporous ruthenium for electrocatalytic hydrogen evolution,Journal of Materials Chemistry A

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Active faceted nanoporous ruthenium for electrocatalytic hydrogen evolution
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2020-09-22 , DOI: 10.1039/d0ta04223d
Abdillah Sani Bin Mohd Najib _{1,

2,

3,

4,

5} , Muhammad Iqbal _{4,

5,

6} , Mohamed Barakat Zakaria _{7,

8,

9,

10,

11} , Shusaku Shoji _{4,

12,

13,

14,

15} , Yohei Cho _{4,

12,

13,

14,

15} , Xiaobo Peng _{4,

5,

6} , Shigenori Ueda _{4,

5,

5,

16,

17} , Ayako Hashimoto _{4,

5,

6} , Takeshi Fujita _{4,

18,

19,

20} , Masahiro Miyauchi _{4,

12,

13,

14,

15} , Yusuke Yamauchi _{7,

8,

9,

10,

11} , Hideki Abe _{1,

2,

3,

4,

5}

Affiliation

Graduate School of Science and Technology
Saitama University
Saitama 338-8570
Japan
National Institute for Materials Science
Tsukuba
Australian Institute for Bioengineering
Nanotechnology (AIBN) and School of Chemical Engineering
The University of Queensland
Brisbane
Australia
Department of Materials Science and Engineering
School of Materials and Chemical Technology
Tokyo Institute of Technology
Tokyo 152-8552
Synchrotron X-ray Station at SPring-8
Sayo
School of Environmental Science and Engineering
Kochi University of Technology
Kami City

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.

中文翻译：

活性多面纳米孔钌用于电催化制氢

由钌-铈（Ru ₂ Ce）合金前体合成了具有反应活性面的纳米多孔钌（np-Ru）。Ru ₂ Ce在氧化气氛中的自发纳米相分离产生了由Ru金属和氧化铈（CeO ₂）组成的层状纳米复合材料。Ru-CeO ₂纳米复合材料在硫酸中的选择性浸出产生np-Ru，其高表面积为48 m ² g ^-1，主要被反应活性{10 [1个结合宏]