Citation: Rui Yang, Xuezhao Shi, Yanyan Wang, Jing Jin, Hanwen Liu, Jie Yin, Yong-Qing Zhao, Pinxian Xi. Ruthenium-modified porous NiCo₂O₄ nanosheets boost overall water splitting in alkaline solution[J]. Chinese Chemical Letters, ;2022, 33(11): 4930-4935. doi: 10.1016/j.cclet.2021.12.058 shu

Ruthenium-modified porous NiCo₂O₄ nanosheets boost overall water splitting in alkaline solution

Rui Yang ^a ,
Xuezhao Shi ^a ,
Yanyan Wang ^b ,
Jing Jin ^a ,
Hanwen Liu ^a ,
Jie Yin ^a ,
Yong-Qing Zhao ^a ,
Pinxian Xi ^{a, *,}

a.
State Key Laboratory of Applied Organic Chemistry Frontiers Science Center for Rare Isotopes College of Chemistry and Chemical Engineering, Lanzhou University Lanzhou 730000, China
b.
Lanzhou Jinchuan Advanced Materials Technology Co., Ltd., Jinchang 737100, China

xipx@lzu.edu.cn

Received Date: 30 August 2021
Revised Date: 17 December 2021
Accepted Date: 22 December 2021
Available Online: 27 December 2021

Figures(6)

Exploring efficient oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) electrocatalysts is crucial for developing water splitting devices. The composition and structure of catalysts are of great importance for catalytic performance. In this work, a heterogeneous Ru modified strategy is engineered to improve the catalytic performance of porous NiCo₂O₄ nanosheets (NSs). Profiting from favorable elements composition and optimized structure property of decreased charge transfer barrier, more accessible active sites and increased oxygen vacancy concentration, the Ru-NiCo₂O₄ NSs exhibits excellent OER activity with a low overpotential of 230 mV to reach the current density of 10 mA/cm² and decent durability. Furthermore, Ru-NiCo₂O₄ NSs show superior HER activity than the pristine NiCo₂O₄ NSs, as well. When assembling Ru-NiCo₂O₄ NSs couple as an alkaline water electrolyzer, a cell voltage of 1.60 V can deliver the current density of 10 mA/cm². This work provides feasible guidance for improving the catalytic performance of spinel-based oxides.
- Ru modification,
- Porous nanosheets,
- Oxygen vacancy,
- Spinel-based oxides,
- Water splitting
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Ruthenium-modified porous NiCo2O4 nanosheets boost overall water splitting in alkaline solution

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Ruthenium-modified porous NiCo₂O₄ nanosheets boost overall water splitting in alkaline solution