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1Ternary Ni-Co-Fe oxyhydroxide oxygen evolution catalysts:Intrinsic activity trends,electrical conductivity,and electronic band structure显示文摘Nickel-,cobalt-,and iron-based(oxy)hydroxides comprise the most-commonly studied electrocatalysts for the oxygen-evolution reaction(OER)in alkaline solution.A fundamental understanding of composition-structure-activity relationships for mixed-metal Ni-Co and Ni-Co-Fe(oxy)hydroxides is important to guide the design of advanced OER catalysts.Here we use cyclic voltammetry,chronopotentiometry,inductively-coupled plasma-optical emission spectroscopy,and in situ electrical conductivity measurements to characterize the properties and activity of various compositions of Ni-Co-Fe(oxy)hydroxides prepared by cathodic co-electrodeposition.Consistent with previous studies,we find Fe is essential for the mixed-metal(oxy)hydroxides to achieve high OER activity.In the rigorous absence of Fe(achieved by using specially cleaned electrolytes),the most-active Ni-Co(oxy)hydroxide composition has an OER turn-over frequency only twice that ofpure Co(oxy)hydroxide,suggesting minimal synergism between the two metals.The addition of Co to Ni-Fe(oxy)hydroxides shifts the onset of electrical conductivity to lower potentials,but has little effect on the intrinsic OER activity,with the most-active Ni-Co-Fe(oxy)hydroxide having an OER turn-over frequency only -1.5 times that of the Ni-Fe(oxy)hydroxides.The magnitudes of the electrical conductivities are similar for all the compositions measured.Density-functional-theory-calculated projected density of states show a significant contribution of all chemical elements at the valence band edge of the mixed-metal oxyhydroxide electronic structure,demonstrating significant electronic hybridization between the elements.The calculations suggest the involvement of all the elements in modulating the electronic structure at putative Fe-based active sites that are probably located at edges or defects in the two-dimensional oxyhydroxide sheets.Michaela Burke Stevens Lisa J. Enman Ester Hamal Korkus Jeremie Zaffran Christina D. M. Trang James Asbury Matthew G. Kast Maytal Caspary Toroker Shannon W. Boettcher 2019Nano Research2019,12,9:5
2Transmission of hepatitis B, hepatitis Cand human immunodefiency viruses thraegh unsafe injeltions in the developing world; model-based regional esti- mates显示文摘Kane A Lloyd J Zaffran M 1999Bull World Health Organ1999,77,10:1
3Congenital heart defects in Fgfr2-Ⅲb and Fgf10 mutant mice显示文摘Marguerie A Bajolle F Zaffran S 2006Cardiovasc Res2006,71,1:1
4Building the mammalian heart from two sources of myocardial cells显示文摘Buckingham M Meilhac S Zaffran S 2005Nat Rev Genet2005,6,:1
5Right ventricular myocardium derives from the anterior heart field 显示文摘Zaffran S Kelly R G Meilhae S M 2004Circ Res2004,95,3:1
6Pax3 and pax7 have distinct and overlapping functions in adult muscle progenitor cells显示文摘Relaix F Montarras D Zaffran S 2006J Cell Biol2006,172,1:1
7Genetics and embryologi- cal mechanisms of congenital heart diseases 显示文摘Bajolle F Zaffran S Bonnet D 2009Arch Cardiovasc Dis2009,102,1:1
8Atrial myocardium derives from the posterior region of the second heart field, which acquires left-right identity as Pitx2c is expressed 显示文摘Galli D Dominguez J N Zaffran S 2008Development2008,135,11:1
9Pax3 and Pax7 have distinct and overlapping function in adult muscle progenitor cells显示文摘RELAIX F MONTARRAS D ZAFFRAN S 0,,01:1
10Transmission of hepatitis B, hepatitis C and human immunodeficiency viruses trough unsafe in- jections in the developing world: model-based regional estimates 显示文摘Kane A Lloyd J Zaffran M 1999Bulletin WHO1999,77,10:1
11A drosophila RNA hellcase gene,pitchoune,is required for cell growth and proliferation and is a potential target of c-myc显示文摘 Chartier A Gallant P 1998Development1998,125,18:1
12Building the mammalian heart from two sources of myocardial cells 显示文摘Buckingham M Meilhac S Zaffran S 2005Nat Rev Genet2005,6,:1
13Cardioblast-intrinsic Tinman Activity Controls Proper Diversification and Differentiation of Myocardial Cells in Drosophila 显示文摘ZAFFRAN S REIM I QIAN L 2006Development2006,20,:1
14CD46/CD3 costimulation induces morphological changes of human T cells and activation of Vac, Rac and extracellular signal regulated kinase mitogen activated protein kinase显示文摘ZAFFRAN Y DESTAING O ROUX A 2001J Immunol2001,167,12:1
15Rotation of the myocardial wall of the outflow tract is implicated in the normal positioning of the great arteries显示文摘Bajolle F Zaffran S Kelly RG 2006Circ Res2006,98,3:1
16Building the mammalian heart from two sources of myocardial cells显示文摘Buckingham M Meilhac S Zaffran S 0,,11:1
17Genetics and embryological mechanisms of congenital heart diseases显示文摘Fanny Bajolle Stéphane Zaffran Damien Bonnet 2008Archives of Cardiovascular Diseases2008,,1:1
18Transmission of hepatilis B, hepatitis C and human immunodeficiency viruses through unsafe injections in the developing world: model-based regional estimales显示文摘Kane A Lloyd J Zaffran M 1999Bulletin of the World Heath Organization1999,77,10:1
19Transmission of hepatitis B,hepatitis C and human immunodeficiency viruses through unsafe injections in the developing world:model-based regional estimates显示文摘Kane A Lloyd J Zaffran M 1999Bulletin of the World Health Organization1999,77,10:1
20A drosophila RNA helicase gene,pitchoune,is required for cell growth and proliferation and is a potential target of c-myc 显示文摘 Chartier A Gallant P 1998Development1998,125,18:1
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