High-efficiency p–n junction oxide photoelectrodes for photoelectrochemical water splitting
Literature Information
Lu Yan
Development of all oxide p–n junctions makes a significant advancement in photoelectrode catalysis functional materials. In this article, we report the preparation of TiO2 nanorod (NR)/Cu2O photoanodes via a simple hydrothermal method followed by an electrochemical deposition process. This facile synthesis route can simultaneously achieve uniform TiO2 NR/Cu2O composite nanostructures and obtain varied amounts of Cu2O by controlling the deposition time. The photocurrent density of TiO2 NR/Cu2O heterojunction photoanodes enhanced the photocatalytic activity with a photocurrent density of 5.25 mA cm−2 at 1.23 V versus RHE compared to pristine TiO2 NR photoanodes under the same conditions. It is demonstrated that the presence of Cu2O has played an important role in expanding the spectral response region and reducing the photogenerated charge recombination rate. More importantly, the results provide new insights into the performance of all oxide p–n junctions as photoanodes for PEC water splitting.
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.











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