Premium
Improvement of Visible‐Light H 2 Evolution Activity of Pb 2 Ti 2 O 5.4 F 1.2 Photocatalyst by Coloading of Rh and Pd Cocatalysts
Author(s) -
Aihara Kenta,
Kato Kosaku,
Uchiyama Tomoki,
Yasuda Shuhei,
Yokoi Toshiyuki,
Yamakata Akira,
Uchimoto Yoshiharu,
Maeda Kazuhiko
Publication year - 2022
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202200875
Subject(s) - photocatalysis , metal , spectroscopy , absorption (acoustics) , materials science , absorption spectroscopy , nuclear chemistry , catalysis , analytical chemistry (journal) , visible spectrum , crystallography , chemistry , metallurgy , physics , optics , biochemistry , optoelectronics , chromatography , quantum mechanics , composite material
Abstract Pb 2 Ti 2 O 5.4 F 1.2 modified with various metal cocatalysts was studied as a photocatalyst for visible‐light H 2 evolution. Although unmodified Pb 2 Ti 2 O 5.4 F 1.2 showed negligible activity, modification of its surface with Rh led to the best observed promotional effect among the Pb 2 Ti 2 O 5.4 F 1.2 samples modified with a single metal cocatalyst. The H 2 evolution activity was further enhanced by coloading with Pd; the Rh−Pd/Pb 2 Ti 2 O 5.4 F 1.2 photocatalyst showed 3.2 times greater activity than the previously reported Pt/Pb 2 Ti 2 O 5.4 F 1.2 . X‐ray absorption fine‐structure spectroscopy, photoelectrochemical, and transient absorption spectroscopy measurements indicated that the coloaded Rh and Pd species, which were partially alloyed on the Pb 2 Ti 2 O 5.4 F 1.2 surface, improved the electron‐capturing ability, thereby explaining the high activity of the coloaded Rh−Pd/Pb 2 Ti 2 O 5.4 F 1.2 catalyst toward H 2 evolution.