Overcoming small-bandgap charge recombination in visible and NIR-light-driven hydrogen evolution by engineering the polymer photocatalyst structure

Elsayed, Mohamed HammadNational Tsing Hua University,National Taiwan University (author)

Designing an organic polymer photocatalyst for efficient hydrogen evolution with visible and near-infrared (NIR) light activity is still a major challenge. Unlike the common behavior of gradually increasing the charge recombination while shrinking the bandgap, we present here a series of polymer nanoparticles (Pdots) based on ITIC and BTIC units with different π-linkers between the acceptor-donor-acceptor (A-D-A) repeated moieties of the polymer. These polymers act as an efficient single polymer photocatalyst for H2 evolution under both visible and NIR light, without combining or hybridizing with other materials. Importantly, the difluorothiophene (ThF) π-linker facilitates the charge transfer between acceptors of different repeated moieties (A-D-A-(π-Linker)-A-D-A), leading to the enhancement of charge separation between D and A. As a result, the PITIC-ThF Pdots exhibit superior hydrogen evolution rates of 279 µmol/h and 20.5 µmol/h with visible (>420 nm) and NIR (>780 nm) light irradiation, respectively. Furthermore, PITIC-ThF Pdots exhibit a promising apparent quantum yield (AQY) at 700 nm (4.76%).

Abdellah, MohamedLund University,Lunds universitet,Kemisk fysik,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,LU profilområde: Ljus och material,Lunds universitets profilområden,Chemical Physics,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH,LU Profile Area: Light and Materials,Lund University Profile areas,United Arab Emirates University,South Valley University(Swepub:lu)mo5485ab (author)
Alhakemy, Ahmed Zaki (author)
Mekhemer, Islam M.A.National Tsing Hua University (author)
Aboubakr, Ahmed Esmail A. (author)
Chen, Bo HanNational Tsing Hua University (author)
Sabbah, AmrNational Taiwan University (author)
Lin, Kun HanNational Tsing Hua University (author)
Chiu, Wen ShengNational Chung-Hsing University (author)
Lin, Sheng JieNational Chung-Hsing University (author)
Chu, Che YiNational Chung-Hsing University (author)
Lu, Chih HsuanNational Tsing Hua University (author)
Yang, Shang DaNational Tsing Hua University (author)
Mohamed, Mohamed GamalNational Sun Yat-sen University (author)
Kuo, Shiao WeiNational Sun Yat-sen University (author)
Hung, Chen Hsiung (author)
Chen, Li ChyongNational Taiwan University (author)
Chen, Kuei HsienNational Taiwan University (author)
Chou, Ho HsiuNational Tsing Hua University (author)
National Tsing Hua UniversityNational Taiwan University (creator_code:org_t)

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Chemical Science ...; and Polymer Chemistr ...

NATURAL SCIENCES: NATURAL SCIENCES; and Chemical Science ...; and Physical Chemist ...

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