Self-Assembling Organic Micro-/Nano-Pillars on Gold and Glass Surfaces

Ji, Hai‐Feng; Ruan, Wenli; Li, Yingying; Ding, Guohua

doi:10.3390/nano4030768

“…To design multi‐doped catalytic sites, we simultaneously reduced Fe and Mo salts inside a hydrogen‐bonded network of melamine and trimesic acid . Pyrolysis (800 °C/Ar) gave a composite material in which Fe 2 MoC and FeO x particles are evenly dispersed in a matrix of N‐doped, porous, graphitic carbon (“Fe 2 MoC@NC”).…”

Section: Methodsmentioning

confidence: 99%

“…To design multi-doped catalytic sites,w es imultaneously reduced Fe and Mo salts inside ah ydrogen-bonded network of melamine and trimesic acid. [20] Pyrolysis (800 8 8C/Ar) gave Scheme 1. Designing asynthetic hydrazine oxidation electrocatalyst by emulating nitrogen-cycle enzymes, with af ocus on multi-doped active sites.…”

mentioning

confidence: 99%

A Multi‐Doped Electrocatalyst for Efficient Hydrazine Oxidation

Ojha

¹

,

Farber

²

,

Burshtein

³

et al. 2018

View full text Add to dashboard Cite

We report an efficient electrocatalyst for the oxidation of hydrazine,apromising fuel for fuel cells and an important analyte for health and environmental monitoring. To design this material, we emulated natural nitrogen-cycle enzymes,f ocusing on designing ac ooperative,m ulti-doped active site.T he catalytic oxidation occurs on Fe 2 MoC nanoparticles and on edge-positioned nitrogen dopants,a ll welldispersed on ah ierarchically porous,g raphitic carbon matrix that provides active site exposure to mass-transfer and charge flow. The new catalyst is the first carbide with HzOR activity.It operates at the most negative onset potentials reported for carbon-based HzOR catalysts at pH 14 (0.28 Vvs. RHE), and has good-to-excellent activity at pH values down to 0. It shows high faradaic efficiency for oxidation to N 2 (3.6 e À /N 2 H 4 ), and is perfectly stable for at least 2000 cycles.

show abstract

“…For example, copper phthalocyanine molecules (CuPc) aggregate into wellordered one-dimensional nanocrystals on layered substrates of molybdenum disulfide (MoS 2 ) and highly oriented pyrolytic graphite (HOPG). [22][23][24] It is of great value to try to induce the nucleation and growth processes by utilizing an extra substrate during the chemical solution growth process for MOF nanocrystals to improve their morphological uniformity, which may benefit their further application in the field of sensors or electronics. In this work, we promoted a surfactant and substrate synergetic solution technique, in which an anionic surfactant and a supported substrate were simultaneously employed to control the shape uniformity of a EuĲIII)-based MOF material, Eu-MFDA of {[Eu 2 (MFDA) 2 (HCOO) 2 (H 2 O) 6 ] •H 2 O} n (H 2 MFDA = 9,9-dimethylfluorene-2,7-dicarboxylic acid, Scheme 1).…”

Section: Introductionmentioning

confidence: 99%

Shape uniformity control of metal–organic framework nanodisks via surfactant and substrate synergetic scissoring effects and their fluorescence sensing properties

Shi

¹

,

Xu

²

,

Zhou

³

et al. 2016

View full text Add to dashboard Cite

A surfactant and substrate synergetic chemical solution technique was promoted to synthesize uniformly shaped MOF nanodisks. The hexaprismatic nanodisks of {[Eu 2 (MFDA) 2 (HCOO) 2 (H 2 O) 6 ]•H 2 O} n (Eu-MFDA_HND, H 2 MFDA = 9,9-dimethyl fluorene-2,7-dicarboxylic acid) were obtained on a supported substrate in the presence of sodium dodecyl sulfate. The surfactant and substrate worked together to produce the uniform hexaprismatic shaped products, but in contrast, mixed products of defected hexaprisms and irregular nanoparticles were obtained without the substrate. Also, the dehydrated Eu-MFDA_HND crystals showed a much higher fluorescence quenching efficiency towards 2,4-DNT as compared to their corresponding bulk crystals. This effective morphology-scissoring technique may help the shape control of other functional MOF materials and benefit their application in the fields of catalysis, sensing, optoelectronic microdevices, micromechanical devices, etc.

show abstract

A Multi‐Doped Electrocatalyst for Efficient Hydrazine Oxidation

Ojha

¹

,

Farber

²

,

Burshtein

³

et al. 2018

View full text Add to dashboard Cite

We report an efficient electrocatalyst for the oxidation of hydrazine,apromising fuel for fuel cells and an important analyte for health and environmental monitoring. To design this material, we emulated natural nitrogen-cycle enzymes,f ocusing on designing ac ooperative,m ulti-doped active site.T he catalytic oxidation occurs on Fe 2 MoC nanoparticles and on edge-positioned nitrogen dopants,a ll welldispersed on ah ierarchically porous,g raphitic carbon matrix that provides active site exposure to mass-transfer and charge flow. The new catalyst is the first carbide with HzOR activity.It operates at the most negative onset potentials reported for carbon-based HzOR catalysts at pH 14 (0.28 Vvs. RHE), and has good-to-excellent activity at pH values down to 0. It shows high faradaic efficiency for oxidation to N 2 (3.6 e À /N 2 H 4 ), and is perfectly stable for at least 2000 cycles. Conflict of interestTheauthors declare no conflict of interest.

show abstract

Self-Assembling Organic Micro-/Nano-Pillars on Gold and Glass Surfaces

Cited by 4 publications

References 14 publications

A Multi‐Doped Electrocatalyst for Efficient Hydrazine Oxidation

A Multi‐Doped Electrocatalyst for Efficient Hydrazine Oxidation

Shape uniformity control of metal–organic framework nanodisks via surfactant and substrate synergetic scissoring effects and their fluorescence sensing properties

A Multi‐Doped Electrocatalyst for Efficient Hydrazine Oxidation

Contact Info

Product

Resources

About