Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2015 Aug 7;6:7992. doi: 10.1038/ncomms8992

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

Copyright © 2015, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved.

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

PMC Copyright notice

(a) Comparison of the HER activity of the CoNPs/CoN_x/C and CoN_x/C catalysts showing the influence of acid leaching. Insets are TEM images demonstrating that all cobalt particles were removed by acid leaching. (b) HER polarization plots of CoN_x/C with and without 10 mM KSCN in 0.5 M H₂SO₄, indicating that SCN⁻ ions strongly poison the CoN_x/C catalyst. Insets are illustrations of cobalt centres blocked by the SCN⁻ ions. These measurements indicated that the cobalt is involved in the active centers but not in the form of metallic nanoparticles.