Correlating activities and defects in (photo)electrocatalysts using in-situ multi-modal microscopic imaging

Autor: Camilo A. Mesa, Michael Sachs, Ernest Pastor, Nicolas Gauriot, Alice J. Merryweather, Miguel A. Gomez-Gonzalez, Konstantin Ignatyev, Sixto Giménez, Akshay Rao, James R. Durrant, Raj Pandya

Publikováno v: Nature Communications, Vol 15, Iss 1, Pp 1-12 (2024)

Abstract Photo(electro)catalysts use sunlight to drive chemical reactions such as water splitting. A major factor limiting photocatalyst development is physicochemical heterogeneity which leads to spatially dependent reactivity. To link structure and

Externí odkaz: https://doaj.org/article/58b0c296c3704a3d84de6d4a26c18393

In situ observation of picosecond polaron self-localisation in α-Fe2O3 photoelectrochemical cells

Autor: Ernest Pastor, Ji-Sang Park, Ludmilla Steier, Sunghyun Kim, Michael Grätzel, James R. Durrant, Aron Walsh, Artem A. Bakulin

Publikováno v: Nature Communications, Vol 10, Iss 1, Pp 1-7 (2019)

The efficiency of Hematite (α-Fe2O3) photo-anodes is thought to be limited by ultrafast lattice distortions or polarons. Here, we use an optical-control method with photocurrent detection to track small polarons in real time and demonstrate that the

Externí odkaz: https://doaj.org/article/48428c50c4884f06bb589f8fa8a021c8

Publisher Correction: Spectroelectrochemical study of water oxidation on nickel and iron oxyhydroxide electrocatalysts

Autor: Laia Francàs, Sacha Corby, Shababa Selim, Dongho Lee, Camilo A. Mesa, Robert Godin, Ernest Pastor, Ifan E. L. Stephens, Kyoung-Shin Choi, James R. Durrant

Publikováno v: Nature Communications, Vol 11, Iss 1, Pp 1-2 (2020)

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

Externí odkaz: https://doaj.org/article/9052ab8794934ec99849288db36ea6b6

Programmable chalcogenide-based all-optical deep neural networks

Autor: Ting Yu Teo, Xiaoxuan Ma, Ernest Pastor, Hao Wang, Jonathan K. George, Joel K. W. Yang, Simon Wall, Mario Miscuglio, Robert E. Simpson, Volker J. Sorger

Publikováno v: Teo, T Y, Ma, X, Pastor, E, Wang, H, George, J K, Yang, J K W, Wall, S, Miscuglio, M, Simpson, R E & Sorger, V J 2022, ' Programmable chalcogenide-based all-optical deep neural networks ', Nanophotonics, vol. 11, no. 17, pp. 4073-4088 . https://doi.org/10.1515/nanoph-2022-0099

We demonstrate a passive all-chalcogenide all-optical perceptron scheme. The network’s nonlinear activation function (NLAF) relies on the nonlinear response of Ge2Sb2Te5 to femtosecond laser pulses. We measured the sub-picosecond time-resolved opti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fd29ed09e11b215017c6a3301741897b
https://pure.au.dk/portal/da/publications/programmable-chalcogenidebased-alloptical-deep-neural-networks(8eb0e871-4fce-48e7-a7d1-58a2a58e7801).html

The role of disorder in photo-electrosynthesis

Autor: Ernest Pastor

Publikováno v: Proceedings of the Materials for Sustainable Development Conference (MAT-SUS).

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d5e319e7fb6d7525e587dce00bebacc2
https://doi.org/10.29363/nanoge.nfm.2022.147