Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 284, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2020.119683
Keywords
Single-atom; Pd; g-C3N4; Defect; Photocatalytic NO conversion
Funding
- National Natural Science Foundation of China [21976116, 21473248]
- Guangdong Science and Technology Program [2018A050506025]
- Guangzhou Science and Technology Program [202002030406, 201804010181]
- High Level Talents Introduction Project of Pearl River Talent Plan in Guangdong Province [2019CX01L308]
- Support Scheme of Guangzhou for Leading Talents in Innovation and Entrepreneurship Funding [2016015]
- key deployment projects of Chinese Academy of Sciences [ZDRW_CN_2020_1]
Ask authors/readers for more resources
The study demonstrated the use of carbon defects to stabilize single-atom Pd, resulting in preferential separation and transportation of photo-generated charge carriers. This improved design effectively enhances photocatalytic activity.
Modification of a photocatalyst with single-atom noble metals can improve its activity while a remaining challenge is the stabilization of single atoms. As a proof of concept, g-C3N4 with desired amount of carbon defects was fabricated to manipulate the distribution of single-atom Pd by taking advantage of its affinity with carbon vacancy-resulted nitrogen atoms. The single-atom Pd was produced by photo-reduction, preferentially located on the carbon vacancy sites as supported by HAADF-STEM and XAFS analyses. As obtained photocatalyst showed high and stable photocatalytic activity in NO conversion; its activity is about 4.4 times higher than that of the pristine g-C3N4. The improved photoactivity was attributed to the preferential separation and transportation of the photo-generated charge carriers due to the introduction of single-atom Pd as evidenced by UV-vis, static and time-resolved photoluminescence spectroscopic analyses. The present work underlines the impetus of surface defect chemistry in the fabrication of single-atom catalysts.
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