In:
Angewandte Chemie International Edition, Wiley, Vol. 59, No. 15 ( 2020-04-06), p. 6224-6229
Abstract:
Single‐atom catalysts are promising platforms for heterogeneous catalysis, especially for clean energy conversion, storage, and utilization. Although great efforts have been made to examine the bonding and oxidation state of single‐atom catalysts before and/or after catalytic reactions, when information about dynamic evolution is not sufficient, the underlying mechanisms are often overlooked. Herein, we report the direct observation of the charge transfer and bond evolution of a single‐atom Pt/C 3 N 4 catalyst in photocatalytic water splitting by synchronous illumination X‐ray photoelectron spectroscopy. Specifically, under light excitation, we observed Pt−N bond cleavage to form a Pt 0 species and the corresponding C=N bond reconstruction; these features could not be detected on the metallic platinum‐decorated C 3 N 4 catalyst. As expected, H 2 production activity (14.7 mmol h −1 g −1 ) was enhanced significantly with the single‐atom Pt/C 3 N 4 catalyst as compared to metallic Pt‐C 3 N 4 (0.74 mmol h −1 g −1 ).
Type of Medium:
Online Resource
ISSN:
1433-7851
,
1521-3773
DOI:
10.1002/anie.201915774
Language:
English
Publisher:
Wiley
Publication Date:
2020
detail.hit.zdb_id:
2011836-3
detail.hit.zdb_id:
123227-7
