journal article·2022-05

Activating a Semiconductor–Liquid Junction via Laser‐Derived Dual Interfacial Layers for Boosted Photoelectrochemical Water Splitting

Jie Jian, Shiyuan Wang, Qian Ye, Fan Li, Guirong Su, Wei Liu, Changzhen Qu, Feng Liu, Can Li, Lichao Jia, Andrei A. Novikov, Vladimir A. Vinokurov, Daniel H. S. Harvey, Dmitry Shchukin, Dennis Friedrich, Roel van de Krol, Hongqiang Wang

Advanced Materials· Volume 34· Issue 19
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Abstract

Abstract The semiconductor–liquid junction (SCLJ), the dominant place in photoelectrochemical (PEC) catalysis, determines the interfacial activity and stability of photoelectrodes, whcih directly affects the viability of PEC hydrogen generation. Though efforts dedicated in past decades, a challenge remains regarding creating a synchronously active and stable SCLJ, owing to the technical hurdles of simultaneously overlaying the two advantages. The present work demonstrates that creating an SCLJ with a unique configuration of the dual interfacial layers can yield BiVO4 photoanodes with synchronously boosted photoelectrochemical activity and operational stability, with values located at the top in the records of such photoelectrodes. The bespoke dual interfacial layers, accessed via grafting laser‐generated carbon dots with phenolic hydroxyl groups (LGCDs‐PHGs), are experimentally verified effective, not only in generating the uniform layer of LGCDs with covalent anchoring for inhibited photocorrosion, but also in activating, respectively, the charge separation and transfer in each layer for boosted charge‐carrier kinetics, resulting in FeNiOOH–LGCDs‐PHGs–MBVO photoanodes with a dual configuration with the photocurrent density of 6.08 mA cm−2 @ 1.23 VRHE, and operational stability up to 120 h @ 1.23 VRHE. Further work exploring LGCDs‐PHGs from catecholic molecules warrants the proposed strategy as being a universal alternative for addressing the interfacial charge‐carrier kinetics and operational stability of semiconductor photoelectrodes.
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Research context

OpenAlex topics: Advanced Photocatalysis Techniques · Copper-based nanomaterials and applications · Iron oxide chemistry and applications

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

Affiliations

State Key Laboratory of Solidification Processing Center for Nano Energy Materials School of Materials Science and Engineering Analytical and Testing Center Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU) Xi'an 710072 P. R. China

Chongqing Innovation Center Northwestern Polytechnical University Chongqing 401135 P. R. China

Nano and Heterogeneous Materials Center School of Materials Science and Engineering Nanjing University of Science and Technology Nanjing Jiangsu 210094 P. R. China

Key Laboratory of Applied Surface and Colloid Chemistry National Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University 620 West Chang'an Street Xi'an Shaanxi 710119 P. R. China

Gubkin Russian State University of Oil and Gas Gubkin University 65/1 Leninsky prospect Moscow 19991 Russia

Stephenson Institute for Renewable Energy University of Liverpool Liverpool L69 7ZF UK

Institute for Solar Fuels Helmholtz‐Zentrum Berlin für Materialien und Energie GmbH Hahn‐Meitner‐Platz 1 14109 Berlin Germany

Funding

National Key Research and Development Program of China · National Natural Science Foundation of China · Fundamental Research Funds for the Central Universities · Russian Science Foundation

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