Direct Electroplating Ruthenium Precursor on the Surface Oxidized Nickel Foam for Efficient and Stable Bifunctional Alkaline Water Electrolysis

Bumseop Kim; Ranjit Thapa; Yifan Zhang; Jeong‐Min Seo; Runnan Guan; Feng Tang; Jae‐Hoon Baek; Jong‐Pil Jeon; Noejung Park; Jong‐Beom Baek

doi:10.1002/adma.202403151

journal article Jun 12, 2024

Direct Electroplating Ruthenium Precursor on the Surface Oxidized Nickel Foam for Efficient and Stable Bifunctional Alkaline Water Electrolysis

Bumseop Kim Ranjit Thapa

Yifan Zhang

Jeong‐Min Seo Runnan Guan Feng Tang

Jae‐Hoon Baek Jong‐Pil Jeon Noejung Park

Jong‐Beom Baek

Advanced Materials Vol. 36 No. 31 · Wiley

View at Publisher Save 10.1002/adma.202403151

Abstract

AbstractWater electrolysis to produce hydrogen (H2) using renewable energy is one of the most promising candidates for realizing carbon neutrality, but its reaction kinetics is hindered by sluggish anodic oxygen evolution reaction (OER). Ruthenium (Ru) in its high‐valence state (oxide) provides one of the most active OER sites and is less costly, but thermodynamically unstable. The strong interaction between Ru nanoparticles (NPs) and nickel hydroxide (Ni(OH)2) is leveraged to directly form Ru–Ni(OH)2 on the surface of a porous nickel foam (NF) electrode via spontaneous galvanic replacement reaction. The formation of Ru─O─Ni bonds at the interface of the Ru NPs and Ni(OH)2 (Ru–Ni(OH)2) on the surface oxidized NF significantly enhance stability of the Ru–Ni(OH)2/NF electrode. In addition to OER, the catalyst is active enough for the hydrogen evolution reaction (HER). As a result, it is able to deliver overpotentials of 228 and 15 mV to reach 10 mA cm−2 for OER and HER, respectively. An industry‐scale evaluation using Ru–Ni(OH)2/NF as both OER and HER electrodes demonstrates a high current density of 1500 mA cm−2 (OER: 410 mV; HER: 240 mV), surpassing commercial RuO2 (OER: 600 mV) and Pt/C based performance (HER: 265 mV).

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References

Details

Published: Jun 12, 2024
Vol/Issue: 36(31)
License: View

Authors

B

Bumseop Kim

Department of Physics, Ulsan National Institute of Science and Technology (UNIST) 50 UNIST‐gil Ulsan 44919 Republic of Korea

R

Ranjit Thapa

Department of Physics SRM University – AP Amaravati Andhra Pradesh 522 502 India

Y

Yifan Zhang

School of Environmental and Chemical Engineering Shanghai University 99 Shangda Road Shanghai 200444 China

J

Jeong‐Min Seo