Enhancing the activity and tuning the mechanism of formic acid oxidation at tetrahexahedral Pt nanocrystals by Au decoration

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	Enhancing the activity and tuning the mechanism of formic acid oxidation at tetrahexahedral Pt nanocrystals by Au decoration
	Liu, Hai-Xia ; Tian, Na ; Brandon, Michael P. ; Pei, Jun ; Huangfu, Zhi-Chao ; Zhan, Chi ; Zhou, Zhi-You ; Hardacre, Christopher ; Lin, Wen-Feng ; Sun, Shi-Gang ; Tian N(田娜) ; Zhou ZY(周志有) ; Sun SG(孙世刚)
刊名	http://dx.doi.org/10.1039/c2cp42930f
	2012
关键词	SINGLE-CRYSTAL ELECTRODES FUEL-CELLS ELECTROCATALYTIC ACTIVITY HCOOH OXIDATION NANOPARTICLE CATALYSTS PLATINUM NANOPARTICLES ETHYLENE-GLYCOL ELECTROOXIDATION SURFACES METHANOL
英文摘要	Major State Basic Research Development Program of China [2012CB215500]; NSFC [20933004, 21073152, 20833005, 21021002]; Foundation for the Author of National Excellent Doctoral Dissertation of China [201126]; Fundamental Research Funds for the Central Universities [2010121021]; Program for New Century Excellent Talents in University [NECT-11-0301, NECT-10-0715]; Queen's University Belfast (The ISW DEL Clean Energies); EPSRC [EP/I013229/1]; Tetrahexahedral Pt nanocrystals (THH Pt NCs), bound by high index facets, belong to an emerging class of nanomaterials that promise to bridge the gap between model and practical electrocatalysts. The atomically stepped surfaces of THH Pt NCs are extremely active for the electrooxidation of small organic molecules but they also readily accommodate the dissociative chemisorption of such species, resulting in poisoning by strongly adsorbed CO. Formic acid oxidation is an ideal reaction for studying the balance between these competing catalyst characteristics, since it can proceed by either a direct or a CO mediated pathway. Herein, we describe electrochemical and in situ FTIR spectroscopic investigations of formic acid electrooxidation at both clean and Au adatom decorated THH Pt NC surfaces. The Au decoration leads to higher catalytic currents and enhanced CO2 production in the low potential range. As the CO oxidation behaviour of the catalyst is not improved by the presence of the Au, it is likely that the role of the Au is to promote the direct pathway. Beyond their fundamental importance, these results are significant in the development of stable, poison resistant anodic electrocatalysts for direct formic acid fuel cells.
语种	英语
出版者	PHYS CHEM CHEM PHYS
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/88365]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Liu, Hai-Xia,Tian, Na,Brandon, Michael P.,et al. Enhancing the activity and tuning the mechanism of formic acid oxidation at tetrahexahedral Pt nanocrystals by Au decoration[J]. http://dx.doi.org/10.1039/c2cp42930f,2012.
APA	Liu, Hai-Xia.,Tian, Na.,Brandon, Michael P..,Pei, Jun.,Huangfu, Zhi-Chao.,...&孙世刚.(2012).Enhancing the activity and tuning the mechanism of formic acid oxidation at tetrahexahedral Pt nanocrystals by Au decoration.http://dx.doi.org/10.1039/c2cp42930f.
MLA	Liu, Hai-Xia,et al."Enhancing the activity and tuning the mechanism of formic acid oxidation at tetrahexahedral Pt nanocrystals by Au decoration".http://dx.doi.org/10.1039/c2cp42930f (2012).