Plasmon-Driven Reaction Selectivity Tuning for Photoelectrochemical H2O2 Production
Source abstract
Abstract
Photoelectrochemical (PEC) H 2 O 2 production has gained interest as a green, promising route to produce valuable chemicals. However, it suffers from low H 2 O 2 Faradaic efficiency due to competing O 2 generation. Here, we propose a plasmon-driven band structure engineering strategy to thermodynamically regulate the product selectivity of a metal oxide based PEC photoanode. It is demonstrated that the plasmonic near-field generated by the periodically patterned Au nanosphere arrays (Au-PAT) effectively modulates the surface photovoltage and energy band structure of the BiVO 4 photoanode. This modulation helps photoinduced charge carriers to satisfy the thermodynamic potential required to shift the water oxidation reaction (WOR) product from O 2 to high-value H 2 O 2 . As a result, BiVO 4 /Au-PAT achieves a H 2 O 2 Faradaic efficiency approximately 3.3 times higher than that of pristine BiVO 4 . These findings suggest the effectiveness of external modulation, originating from a plasmonic near-field effect, in regulating the WOR pathway, providing an efficient and selective route to value-added PEC production.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advanced Photocatalysis Techniques · Gas Sensing Nanomaterials and Sensors · Copper-based nanomaterials and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Chemical and Biomolecular Engineering Yonsei University 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea
School of Chemical Engineering Sungkyunkwan University (SKKU) 2066 Seobu-ro, Jangan-gu, Suwon, 16419, Republic of Korea
MIIT Key Laboratory of Advanced Display Material and Devices School of Materials Science and Engineering Nanjing University of Science and Technology 200 Xiaolingwei Street, Xuanwu District, Nanjing, 210094, People’s Republic of China
SKKU Institute of Energy Science & Technology (SIEST) Sungkyunkwan University (SKKU) 2066 Seobu-ro, Jangan-gu, Suwon 16419, Republic of Korea
SKKU Advanced Institute of Nanotechnology (SAINT) Sungkyunkwan University (SKKU) 2066 Seobu-ro, Jangan-gu, Suwon 16419, Republic of Korea
Funding
National Research Foundation of Korea · Korea Institute of Energy Technology Evaluation and Planning · Yonsei-KIST Convergence Research Program · Yonsei Fellow Program
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