气候变化领域集成服务门户(CCPortal): A low-noble-metal W1-xIrxO3-δ water oxidation electrocatalyst for acidic media via rapid plasma synthesis

CCPortal

DOI	10.1039/c7ee02626a
	A low-noble-metal W1-xIrxO3-δ water oxidation electrocatalyst for acidic media via rapid plasma synthesis
	Kumari S.; Ajayi B.P.; Kumar B.; Jasinski J.B.; Sunkara M.K.; Spurgeon J.M.
发表日期	2017
ISSN	17545692
起始页码	2432
结束页码	2440
卷号	10 期号:11
英文摘要	Acid-based electrolysis has many advantages, but to achieve simultaneous activity and stability, commercial water oxidation catalysts rely on noble metal oxides that are expensive and too rare for the global scale. Here, earth-abundant tungsten was used as a structural metal to dilute the noble metal iridium content while maintaining high activity and stability in acid. Mixed-metal oxide catalysts were synthesized using rapid plasma oxidation in which the non-equilibrium reaction environment permitted better formation of a homogenous W1-xIrxO3-δ phase. With an Ir metal content as low as 1%, a competitive and durable overpotential for oxygen evolution was achieved. Relative to high Ir content, low Ir compositions consisted of a more highly crystalline, phase-pure iridium polytungstate which was more catalytically active per Ir content. Moreover, the plasma-synthesized material had a sharp electrocatalytic improvement over an equivalent composition synthesized via standard thermal oxidation, demonstrating the value of non-equilibrium synthesis to find new catalysts. © The Royal Society of Chemistry 2017.
英文关键词	Catalysts; Electrocatalysts; Metals; Oxidation; Precious metals; Thermooxidation; Commercial waters; Electrocatalytic; Mixed metal oxide catalyst; Noble metal oxides; Non-equilibrium synthesis; Oxygen evolution; Synthesized materials; Thermal oxidation; Iridium; acid; catalyst; chemical composition; electrochemical method; electrokinesis; inorganic compound; metal; oxidation; oxide; oxygen; plasma; tungsten
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190383
作者单位	Conn Center for Renewable Energy Research, University of Louisville, Louisville, KY 40292, United States; Department of Chemical Engineering, University of Louisville, Louisville, KY 40292, United States
推荐引用方式 GB/T 7714	Kumari S.,Ajayi B.P.,Kumar B.,et al. A low-noble-metal W1-xIrxO3-δ water oxidation electrocatalyst for acidic media via rapid plasma synthesis[J],2017,10(11).
APA	Kumari S.,Ajayi B.P.,Kumar B.,Jasinski J.B.,Sunkara M.K.,&Spurgeon J.M..(2017).A low-noble-metal W1-xIrxO3-δ water oxidation electrocatalyst for acidic media via rapid plasma synthesis.Energy & Environmental Science,10(11).
MLA	Kumari S.,et al."A low-noble-metal W1-xIrxO3-δ water oxidation electrocatalyst for acidic media via rapid plasma synthesis".Energy & Environmental Science 10.11(2017).