Restructuring highly electron-deficient metal-metal oxides for boosting stability in acidic oxygen evolution reaction
| Autor: | Taehun Yang, Xinghui Liu, Jinsun Lee, Ashwani Kumar, Hyunwoo Kim, Min Gyu Kim, Mengfang Liang, Jian Wang, Ngoc Quang Tran, Hyoyoung Lee, Shibo Xi, Xiaodong Shao |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Multidisciplinary
Materials science Catalyst synthesis Science Oxygen evolution General Physics and Astronomy chemistry.chemical_element General Chemistry Overpotential General Biochemistry Genetics and Molecular Biology Nanomaterial-based catalyst Article Catalysis Metal Electron transfer chemistry Chemical engineering Oxidation state visual_art visual_art.visual_art_medium Nanoparticles Iridium Electrocatalysis |
| Zdroj: | Nature Communications Nature Communications, Vol 12, Iss 1, Pp 1-11 (2021) |
| ISSN: | 2041-1723 |
| Popis: | The poor catalyst stability in acidic oxidation evolution reaction (OER) has been a long-time issue. Herein, we introduce electron-deficient metal on semiconducting metal oxides-consisting of Ir (Rh, Au, Ru)-MoO3 embedded by graphitic carbon layers (IMO) using an electrospinning method. We systematically investigate IMO’s structure, electron transfer behaviors, and OER catalytic performance by combining experimental and theoretical studies. Remarkably, IMO with an electron-deficient metal surface (Irx+; x > 4) exhibit a low overpotential of only ~156 mV at 10 mA cm−2 and excellent durability in acidic media due to the high oxidation state of metal on MoO3. Furthermore, the proton dissociation pathway is suggested via surface oxygen serving as proton acceptors. This study suggests high stability with high catalytic performance in these materials by creating electron-deficient surfaces and provides a general, unique strategy for guiding the design of other metal-semiconductor nanocatalysts. The poor catalyst stability for oxygen evolution in acidic media has been a long-time issue. Here, authors demonstrate iridium on MoO3 exhibits a low overpotential for oxygen evolution and excellent durability in acidic media due to the high oxidation state of iridium metal on MoO3. |
| Databáze: | OpenAIRE |
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