Direct Observation of Photoinduced Charge Separation in Ruthenium Complex/Ni(OH)2 Nanoparticle Hybrid

Tang, Yu; Pattengale, Brian A.; Ludwig, John M.; Atifi, Abderrahman; Zinovev, Alexander V.; Dong, Bin; Kong, Qingyu; Zuo, Xiaobing; Zhang, Xiaoyi; Huang, Jier

doi:10.1038/srep18505

Title: Direct Observation of Photoinduced Charge Separation in Ruthenium Complex/Ni(OH)₂ Nanoparticle Hybrid

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Abstract

We report that Ni(OH)₂ have emerged as important functional materials for solar fuel conversion because of their potential as cost-effective bifunctional catalysts for both hydrogen and oxygen evolution reactions. However, their roles as photocatalysts in the photoinduced charge separation (CS) reactions remain unexplored. In this paper, we investigate the CS dynamics of a newly designed hybrid catalyst by integrating a Ru complex with Ni(OH)₂ nanoparticles (NPs). Using time resolved X-ray absorption spectroscopy (XTA), we directly observed the formation of the reduced Ni metal site (~60 ps), unambiguously demonstrating CS process in the hybrid through ultrafast electron transfer from Ru complex to Ni(OH)₂ NPs. Compared to the ultrafast CS process, the charge recombination in the hybrid is ultraslow (>>50 ns). These results not only suggest the possibility of developing Ni(OH)₂ as solar fuel catalysts, but also represent the first time direct observation of efficient CS in a hybrid catalyst using XTA.

Authors:

Tang, Yu ^[1]; Pattengale, Brian A. ^[1]; Ludwig, John M. ^[1]; Atifi, Abderrahman ^[1]; Zinovev, Alexander V. ^[2]; Dong, Bin ^[1]; Kong, Qingyu ^[3]; Zuo, Xiaobing ^[3]; Zhang, Xiaoyi ^[3]; Huang, Jier ^[1]

Marquette Univ., Milwaukee, WI (United States)
Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
Argonne National Lab. (ANL), Argonne, IL (United States). X-ray Science Division

Publication Date:: 2015-12-17

Research Org.:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1236501

Grant/Contract Number:: AC02-06CH11357

Resource Type:: Accepted Manuscript

Journal Name:: Scientific Reports

Additional Journal Information:: Journal Volume: 5; Journal ID: ISSN 2045-2322

Publisher:: Nature Publishing Group

Country of Publication:: United States

Language:: English

Subject:: 14 SOLAR ENERGY

Citation Formats


                    Tang, Yu, Pattengale, Brian A., Ludwig, John M., Atifi, Abderrahman, Zinovev, Alexander V., Dong, Bin, Kong, Qingyu, Zuo, Xiaobing, Zhang, Xiaoyi, and Huang, Jier. Direct Observation of Photoinduced Charge Separation in Ruthenium Complex/Ni(OH)2 Nanoparticle Hybrid.  United States: N. p., 2015. 
Web.  doi:10.1038/srep18505.

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                    Tang, Yu, Pattengale, Brian A., Ludwig, John M., Atifi, Abderrahman, Zinovev, Alexander V., Dong, Bin, Kong, Qingyu, Zuo, Xiaobing, Zhang, Xiaoyi, & Huang, Jier. Direct Observation of Photoinduced Charge Separation in Ruthenium Complex/Ni(OH)2 Nanoparticle Hybrid.  United States.  https://doi.org/10.1038/srep18505

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                    Tang, Yu, Pattengale, Brian A., Ludwig, John M., Atifi, Abderrahman, Zinovev, Alexander V., Dong, Bin, Kong, Qingyu, Zuo, Xiaobing, Zhang, Xiaoyi, and Huang, Jier. Thu .  
"Direct Observation of Photoinduced Charge Separation in Ruthenium Complex/Ni(OH)2 Nanoparticle Hybrid".  United States.  https://doi.org/10.1038/srep18505.  https://www.osti.gov/servlets/purl/1236501.

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@article{osti_1236501,

  title        = {Direct Observation of Photoinduced Charge Separation in Ruthenium Complex/Ni(OH)2 Nanoparticle Hybrid},

  author       = {Tang, Yu and Pattengale, Brian A. and Ludwig, John M. and Atifi, Abderrahman and Zinovev, Alexander V. and Dong, Bin and Kong, Qingyu and Zuo, Xiaobing and Zhang, Xiaoyi and Huang, Jier},

  abstractNote = {We report that Ni(OH)2 have emerged as important functional materials for solar fuel conversion because of their potential as cost-effective bifunctional catalysts for both hydrogen and oxygen evolution reactions. However, their roles as photocatalysts in the photoinduced charge separation (CS) reactions remain unexplored. In this paper, we investigate the CS dynamics of a newly designed hybrid catalyst by integrating a Ru complex with Ni(OH)2 nanoparticles (NPs). Using time resolved X-ray absorption spectroscopy (XTA), we directly observed the formation of the reduced Ni metal site (~60 ps), unambiguously demonstrating CS process in the hybrid through ultrafast electron transfer from Ru complex to Ni(OH)2 NPs. Compared to the ultrafast CS process, the charge recombination in the hybrid is ultraslow (>>50 ns). These results not only suggest the possibility of developing Ni(OH)2 as solar fuel catalysts, but also represent the first time direct observation of efficient CS in a hybrid catalyst using XTA.},

  doi          = {10.1038/srep18505},

  journal      = {Scientific Reports},

  number       = ,

  volume       = 5,

  place        = {United States},

  year         = {2015},

  month        = {12}

}

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Title: Direct Observation of Photoinduced Charge Separation in Ruthenium Complex/Ni(OH)2 Nanoparticle Hybrid

Abstract

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Title: Direct Observation of Photoinduced Charge Separation in Ruthenium Complex/Ni(OH)₂ Nanoparticle Hybrid