Details

Autor(en) / Beteiligte

• Huang, Wenjing
• Zhang, Junming
• Liu, Daobin
• Xu, Wenjie
• Wang, Yu
• Yao, Jiandong
• Tan, Hui Teng
• Dinh, Khang Ngoc
• Wu, Chen
• Kuang, Min
• Fang, Wei
• Dangol, Raksha
• Song, Li
• Zhou, Kun
• Liu, Chuntai
• Xu, Jian Wei
• Liu, Bin
• Yan, Qingyu

Titel

Tuning the Electronic Structures of Multimetal Oxide Nanoplates to Realize Favorable Adsorption Energies of Oxygenated Intermediates

Ist Teil von

• ACS nano, 2020-12, Vol.14 (12), p.17640-17651

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Highly active oxygen evolution reaction (OER) electrocatalysts are important to effectively transform renewable electricity to fuel and chemicals. In this work, we construct a series of multimetal oxide nanoplate OER electrocatalysts through successive cation exchange followed by electrochemical oxidation, whose electronic structure and diversified metal active sites can be engineered via the mutual synergy among multiple metal species. Among the examined multimetal oxide nanoplates, CoCeNiFeZnCuO x nanoplates exhibit the optimal adsorption energy of OER intermediates. Together with the high electrochemical active surface area, the CoCeNiFeZnCuO x nanoplates manage to deliver a small overpotential of 211 mV at an OER current density of 10 mA cm–2 (η10) with a Tafel slope as low as 21 mV dec–1 in 1 M KOH solution, superior to commercial IrO2 (339 mV at η10, Tafel slope of 55 mV dec–1), which can be stably operated at 10 mA cm–2 (at an overpotential of 211 mV) and 100 mA cm–2 (at an overpotential of 307 mV) for 100 h.