Journal
ADVANCED MATERIALS
Volume 30, Issue 28, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201705979
Keywords
carbon-encapsulated WOx; catalysts; density functional theory; hydrogen evolution reaction; stability
Categories
Funding
- Natural Science Foundation of Guangxi [2016GXNSFCB380002]
- Major International (Regional) Joint Research Project [U1705252]
- National Basic Research Program of China [2015CB932304, 2017YFB0103000]
- Natural Science Foundation of China [21673094, 21673093]
- S&T Research Program of Education Department of Jilin Province [JJKH20170780KJ]
- Jilin Province S&T Development Plan [20170101175JC]
- Guangxi Science and Technology Project [AB16380030, 20171107]
Ask authors/readers for more resources
Developing non-noble metal catalysts as Pt substitutes, with good activity and stability, remains a great challenge for cost-effective electrochemical evolution of hydrogen. Herein, carbon-encapsulated WOx anchored on a carbon support (WOx@C/C) that has remarkable Pt-like catalytic behavior for the hydrogen evolution reaction (HER) is reported. Theoretical calculations reveal that carbon encapsulation improves the conductivity, acting as an electron acceptor/donor, and also modifies the Gibbs free energy of H* values for different adsorption sites (carbon atoms over the W atom, O atom, W-O bond, and hollow sites). Experimental results confirm that WOx@C/C obtained at 900 degrees C with 40 wt% metal loading has excellent HER activity regarding its Tafel slope and overpotential at 10 and 60 mA cm(-2), and also has outstanding stability at -50 mV for 18 h. Overall, the results and facile synthesis method offer an exciting avenue for the design of cost-effective catalysts for scalable hydrogen generation.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available