Imidazole substituted Zinc(ii) phthalocyanines for co-catalyst-free photoelectrochemical and photocatalytic hydrogen evolution: influence of the anchoring group

Yüzer A. C., Genc E., Kurtay G., Yanalak G., Aslan E., Harputlu E., ...More

Chemical Communications, vol.57, no.73, pp.9196-9199, 2021 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 57 Issue: 73
  • Publication Date: 2021
  • Doi Number: 10.1039/d1cc03880j
  • Journal Name: Chemical Communications
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, EMBASE, MEDLINE, DIALNET
  • Page Numbers: pp.9196-9199
  • Hacettepe University Affiliated: No

Abstract

© The Royal Society of Chemistry 2021.Novel zinc phthalocyanine derivatives, ZnPc-1 and ZnPc-2, consisting of one and four imidazole units, respectively, have been synthesized and utilized as panchromatic photosensitizers for photocatalytic and photoelectrochemical H2evolution. The effect of the imidazole-anchoring group on the photocatalytic H2production has been compared with ZnPc-3, which possesses a carboxylic acid unit as the anchoring group. ZnPc-1/TiO2shows the best photoactivity with the highest H2evolution rate of 0.4006 mmol g−1h−1, which is much higher than that of ZnPc-2/TiO2and ZnPc-3/TiO2(0.3319 mmol g−1h−1and 0.3555 mmol g−1h−1, respectively). After 20 h of irradiation, ZnPc-1 produces an H2production rate of 3.4187 mmol g−1with a turnover number (TON) of 14863 and a solar-to-hydrogen energy (STH) conversion efficiency of 1.03%, without using a co-catalyst.