journal article·2020-08-12

Interface Engineering with Ultralow Ruthenium Loading for Efficient Water Splitting

Yu Pei, Shaokui Guo, Qiangjian Ju, Zichuang Li, Peiyuan Zhuang, Ruguang Ma, Yifan Hu, Yufang Zhu, Minghui Yang, Yin Zhou, Jianfeng Shen, Jiacheng Wang

ACS Applied Materials & Interfaces· Volume 12· Issue 32
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Abstract

Developing high-performance and cost-effective bifunctional electrocatalysts for water splitting is the key to large-scale hydrogen production. How to achieve higher performance with a lower amount of noble metal is still a major challenge. Herein, using a facile wet-chemistry strategy, we report the ultralow amount loading of ruthenium (Ru) on porous nickel foam (NF) as a highly efficient bifunctional electrocatalyst for water splitting. Theoretical simulations reveal that the coupling effect of Ru and Ni can significantly reduce the d-band center of the composite. The Ru-modified NF exhibits a very high level of HER activity with only 0.3 wt% of Ru, far surpassing commercial Pt/C. It only requires an extremely low overpotential (η10) of 10 mV to achieve a current density of 10 mA cm–2 in alkaline solution and a quite low Tafel slope of 34 mV dec–1. This catalyst also shows remarkable performance for overall water splitting with a low voltage of 1.56 V at 10 mA cm–2. These findings indicate the potential of this material in water–alkali electrolyzers, providing a new approach for fabrication of low-cost advanced electrocatalysts.
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Research context

OpenAlex topics: Electrocatalysts for Energy Conversion · Semiconductor materials and devices · Ammonia Synthesis and Nitrogen Reduction

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of High-Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 585 Heshuo Road, Shanghai 201899, P. R. China

Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, P. R. China

School of Materials Science and Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, P. R. China

Institute of Special Materials and Technology, Fudan University, Shanghai 200433, P. R. China

Ningbo Institute of Industrial Technology, Chinese Academy of Sciences, 1219 Zhongguan West Road, Ningbo 315201, P. R. China

School of Shipping and Mechatronic Engineering, Taizhou University, 93 Jichuan East Road, Taizhou 225300, P. R. China

Funding

Ministry of Education of the People's Republic of China · Ningbo Municipal People's Government · Science and Technology Commission of Shanghai Municipality · National Natural Science Foundation of China · Chinese Academy of Sciences · Equipment Research Program · Central People's Government of the People's Republic of China

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