Journal
CARBON
Volume 133, Issue -, Pages 260-266Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2018.03.043
Keywords
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Funding
- National Natural Science Foundation of China [11504041, 11574040]
- Fundamental Research Funds for the Central Universities of China [DUT16LAB01, DUT17LAB19]
- Supercomputing Center of Dalian University of Technology
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The hybrid nanostructures of nitrogen doped carbon materials and nonprecious transition metals are among the most promising electrocatalysts to replace noble metal catalysts for renewable energy applications. However, the fundamental principles governing the catalytic activity of such hybrid materials remain elusive. Herein, we systematically explore the electrocatalytic properties of transition metals, transition metal oxides and carbides substrates covered by nitrogen-n (doped graphitic sheets for hydrogen evolution reaction (HER). Our first-n(principles calculations show that the graphitic sheet is prominently activated by the nitrogen doping and the coordinate bond with metal (compound) substrate through intralayer and interlayer charge transfer. Such hybrid materials can provide optimal binding capability for HER catalysis with Tafel barrier down to 1.0 eV. The HER activity can be correlated to the C p(z) band center, which is in turn governed by the electronic coupling strength between the graphitic sheet and metal substrate, thus paving a way to rational design of graphitic carbon/transition metal hybrid electrocatalysts of high performance. (C) 2018 Elsevier Ltd. All rights reserved.
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