气候变化领域集成服务门户(CCPortal): Understanding the formation of bulk- And surface-active layered (oxy)hydroxides for water oxidation starting from a cobalt selenite precursor

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DOI	10.1039/d0ee01912g
	Understanding the formation of bulk- And surface-active layered (oxy)hydroxides for water oxidation starting from a cobalt selenite precursor
	Hausmann J.N.; Mebs S.; Laun K.; Zebger I.; Dau H.; Menezes P.W.; Driess M.
发表日期	2020
ISSN	1754-5692
起始页码	3607
结束页码	3619
卷号	13 期号:10
英文摘要	The urgent need for a stable, efficient, and affordable oxygen evolution reaction (OER) catalyst has led to the investigation of a vast amount of transition metal materials with multiple different anions. In situ and post catalytic characterization shows that most materials transform during the harsh OER conditions to layered (oxy)hydroxides (LOH). Several open questions concerning these in situ formed LOH remain such as: an explanation for their strongly varying activities, or the effect of the precatalyst structure, leaching anions, and transformation conditions on the formed LOH. Herein, we report on a cobalt selenite precursor, which, depending on pH and potential, transforms irreversibly into two different LOH OER catalysts. Combining multiple electrochemical and analytical methods ex and in situ, we prove that one of these products is near-surface catalytically active and the other one throughout the bulk with an in situ average cobalt oxidation state of 3.2. We deduce a detailed structural model explaining these differences and propose general concepts relating both the precatalyst structure and the transformation conditions to the final catalyst. Further, we apply these models to the most promising non-noble metal catalyst, NiFe LOH. © The Royal Society of Chemistry.
语种	英语
scopus关键词	Cobalt; Iron alloys; Oxygen evolution reaction; Precious metals; Analytical method; Catalytic characterization; Cobalt oxidation; Non-noble metal catalysts; Oxygen evolution reaction (oer); Structural modeling; Surface active; Water oxidation; Catalysts
来源期刊	Energy and Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162493
作者单位	Department of Chemistry: Metalorganics and Inorganic Materials, Technische Universität Berlin Straße des, 17 Juni 135, Sekr. C2, Berlin, 10623, Germany; Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, Berlin, 14195, Germany; Department of Chemistry: Physical Chemistry/Biophysical Chemistry, Technische Universität Berlin Straße des, 17 Juni 135, Sekr. C2, Berlin, 10623, Germany
推荐引用方式 GB/T 7714	Hausmann J.N.,Mebs S.,Laun K.,et al. Understanding the formation of bulk- And surface-active layered (oxy)hydroxides for water oxidation starting from a cobalt selenite precursor[J],2020,13(10).
APA	Hausmann J.N..,Mebs S..,Laun K..,Zebger I..,Dau H..,...&Driess M..(2020).Understanding the formation of bulk- And surface-active layered (oxy)hydroxides for water oxidation starting from a cobalt selenite precursor.Energy and Environmental Science,13(10).
MLA	Hausmann J.N.,et al."Understanding the formation of bulk- And surface-active layered (oxy)hydroxides for water oxidation starting from a cobalt selenite precursor".Energy and Environmental Science 13.10(2020).