期刊
MATERIALS TODAY PHYSICS
卷 16, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.mtphys.2020.100300
关键词
Ruthenium; Hydrogen evolution reaction; Oxygen reduction reaction; Ultralow loading
资金
- National Natural Science Foundation of China [21703119]
- Natural Science Foundation of Shandong Province [ZR2017MB036]
- Grant for Taishan Scholar Advantage Characteristic Discipline of Shandong Province
- Start-up Grant for QiLu Young Scholars of Shandong University
- Danish National Research Foundation
- AUFF NOVA-project
- EU H2020 RISE (MNR4SCell) [734174]
Ru/HNCS is a bifunctional electrocatalyst with excellent catalytic activities towards both hydrogen production and oxygen reduction. It shows promising potential as an alternative to Pt-based electrocatalysts in energy conversion and storage.
The development of highly efficient and durable catalysts for production and storage of clean energy remains a formidable challenge. Herein, a bifunctional electrocatalyst composed of ultrasmall ruthenium nanoparticles confined within a hollow nitrogen-doped carbon spheres (Ru/HNCS) was designed and synthesized through the pyrolysis of Ru3+ coordinated polydopamine layers. The as-synthesized Ru/ HNCS with Ru content even below 0.1 wt% exhibited excellent catalytic activities towards both hydrogen production and oxygen reduction. When catalyzing hydrogen evolution reaction, a low overpotential of 39 mV was sufficiently to achieve the current density of 10 mA cm(-2) in acidic media and the corresponding Tafel slope was only 30 mV dec(-1). Furthermore, Ru/HNCS also exhibited outstanding oxygen reduction reaction activity with a half-potential of 0.72 V and an onset potential of 0.83 V, as well as high stability and palmary anti-poisoning capability for methanol in basic electrolyte. This Ru/HNCS might be a promising alternative to Pt-based electrocatalysts in energy conversion and storage. (C) 2020 Elsevier Ltd. All rights reserved.
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