journal article·2024-09-11

Hierarchical Branched TiO2 Photo/Photoelectrocatalyst with Directed Charge Transfer for Efficient Hydrogen Production from Seawater

Yi-Xuan Liu, Yi Lu, Li He, Ge Tian, Li-Ying Wang, Fu-Fei Pu, Ze-En Zhou, Si-Ming Wu, Jie Ying, Wei Geng, Christoph Janiak, Xiao-Yu Yang

ACS Applied Materials & Interfaces· Volume 16· Issue 36
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Abstract

The directed electron transport channel design in semiconductors, which could promote charge utilization, is attractive but rarely reported. Hierarchical branched titanium dioxide (HB-TiO 2 ), possessing a charge cascade transfer channel, was constructed by assembling titanium-defected TiO 2 nanobranches on oxygen-defected TiO 2 nanobelts. The interfacial Ti/O vacancies have been detected by X-ray photoelectron and electron paramagnetic resonance spectroscopies, and the vacancies act as the “bridge” of photogenerated carrier transport. This structure maintained high photoactivity in H 2 production in different mass fractions of NaCl solutions. The photocurrent density of the HB-TiO 2 photoanode in natural seawater is 3.9, 2.1, and 2.6 times that of oxygen-defected TiO 2 nanobelts, titanium-defected TiO 2 nanobranches, and their mixture, respectively. Besides, the charge transport mechanism from the inner lattice to the TiO 2 surface is proposed.
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Research context

OpenAlex topics: Advanced Photocatalysis Techniques · Electrocatalysts for Energy Conversion · TiO2 Photocatalysis and Solar Cells

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & Shenzhen Research Institute & Laoshan Laboratory, Wuhan University of Technology, Wuhan, Hubei 430070, People’s Republic of China

National Energy Key Laboratory for New Hydrogen-Ammonia Energy Technologies, Foshan Xianhu Laboratory, Foshan, Guangdong 528200, People’s Republic of China

Hoffmann Institute of Advanced Materials, Shenzhen Polytechnic, 7098 Liuxian Boulevard, Nanshan District, Shenzhen, Guangdong 518055, People’s Republic of China

State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan, Hubei 430071, People’s Republic of China

School of Chemical Engineering and Technology, Sun Yat-Sen University, Zhuhai, Guangdong 519082, People’s Republic of China

Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf, Germany

Funding

Changjiang Scholar Program, Ministry of Education · Jilin Provincial Key Research and Development Plan Project · National Key Research and Development Program of China Stem Cell and Translational Research · Wuhan University of Technology · National Natural Science Foundation of China · Higher Education Discipline Innovation Project

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