التفاصيل البيبلوغرافية
| العنوان: |
Self-Activation of a Polyoxometalate-Derived Composite Electrocatalyst for the Oxygen Evolution Reaction |
| المؤلفون: |
Ruihao Gong (11288115), Dandan Gao (558010), Rongji Liu (1803862), Dieter Sorsche (5687252), Johannes Biskupek (1920223), Ute Kaiser (1567189), Sven Rau (1306290), Carsten Streb (2168341) |
| سنة النشر: |
2021 |
| المجموعة: |
Smithsonian Institution: Digital Repository |
| مصطلحات موضوعية: |
Biochemistry, Physiology, Pharmacology, Biotechnology, Evolutionary Biology, Developmental Biology, Computational Biology, Environmental Sciences not elsewhere classified, Biological Sciences not elsewhere classified, Chemical Sciences not elsewhere classified, reported approach enables, oxygen evolution reaction, main contributing factors, increased current density, high faradaic efficiency, derived composite electrocatalyst, cationic polymer polyethylenimine, aqueous koh solution, anion ([ co, derived composite electrocatalysts, 9 , 2 , decreased oer overpotential, active electrocatalysts, )< sub, viable route, underlying reasons, splitting water, scalable fabrication, nanoparticles using |
| الوصف: |
The electrocatalytic oxygen evolution reaction (OER) is a key step to access “green hydrogen” by splitting water into O 2 and H 2 . Here, we present a molecule-in-material integration concept based on immobilizing the polyoxometalate (POM) anion ([Co 4 (H 2 O) 2 (PW 9 O 34 ) 2 ] 10– ) as a molecular precursor on commercial TiO 2 (P25) nanoparticles using the cationic polymer polyethylenimine (PEI) as a linking agent. The resulting composite shows promising electrocatalytic OER performance in 0.1 M aqueous KOH solution over prolonged periods (>10 h), during which a remarkable self-activation is observed, leading to a decreased OER overpotential, increased current density, and high Faradaic efficiency (91 ± 1%). Mechanistic studies shed light on the underlying reasons for this self-activation and show that the formation of a highly active cobalt oxide and/or hydroxide catalyst and an increase in the electrocatalytically active surface area as well as electrical conductivity are the main contributing factors. The reported approach enables the scalable fabrication of POM-derived composite electrocatalysts, while self-activation could be a viable route to the more robust and more active electrocatalysts for challenging energy-conversion reactions. |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
unknown |
| Relation: |
https://figshare.com/articles/journal_contribution/Self-Activation_of_a_Polyoxometalate-Derived_Composite_Electrocatalyst_for_the_Oxygen_Evolution_Reaction/16821184 |
| DOI: |
10.1021/acsaem.1c02399.s001 |
| الاتاحة: |
https://doi.org/10.1021/acsaem.1c02399.s001 |
| Rights: |
CC BY-NC 4.0 |
| رقم الانضمام: |
edsbas.2F992532 |
| قاعدة البيانات: |
BASE |