A volcano curve: optimizing methanol electro-oxidation on Pt-decorated Ru nanoparticles

文献信息

发布日期 2009-06-26
DOI 10.1039/B816531A
影响因子 3.676
作者

Bingchen Du, Savelas A. Rabb, Christopher Zangmeister, YuYe Tong


查看原文

摘要

Controlled Pt adlayers were deposited on commercial Ru nanoparticles (NPs) using an industrially scalable one-pot ethylene glycol (EG) reduction based method and were characterized by X-ray diffraction (XRD), electrochemical (EC) CO stripping voltammetry, inductively-coupled plasma optical emission spectrometry (ICP-OES), X-ray photoemission spectroscopy (XPS), and transmission electron microscopy (TEM). Compared with the previously used “spontaneous deposition”, the wet chemistry-based EG method is less technically demanding, i.e. no need to handle high-temperature hydrogen reduction, offers a better control of the Pt packing density (PD), enables the formation of stable, segregated Pt surface adlayers for optimal tuning and use of Pt, and effectively prevents NPs sintering. Two batches of a total of 11 (8 vs. 3) samples with different values of Pt PD ranging from 0.05 to 0.93 were prepared, with a time interval of more than 18 months between the sytheses of the two batches of samples, and an excellent reproducibility of results was observed. All samples were investigated in terms of methanol (MeOH) electro-oxidation (EO) by cyclic voltammetry (CV) and chronoamperometry (CA). Although the peak current of CV increased as the Pt content increased, the long-term steady-state MeOH electro-oxidation current density of the Pt-decorated Ru NPs measured by CA showed a volcano curve as a function of the Pt PD, with the maximum appearing at the PD of 0.31. The optimal peak activity was ∼150% higher than that of the industrial benchmark PtRu (1 : 1) alloy NPs and could deliver the same performance at half the electrode material cost. Fundamentally, such a volcano curve in the reaction current is the result of two competing processes of the EO of MeOH: the triple dehydrogenation of MeOH that prefers more Pt ensemble sites, and the elimination of poisonous CO that is enhanced by more adjacent Ru/Pt sites via the so-called bifunctional mechanism and also by possible electronic effects at low Pt coverages.

相关文献

Tunable photoluminescence and room temperature ferromagnetism of In2S3:Dy3+,Tb3+ nanoparticles

Zhifang Li, Tianye Yang, Qi Zhao, Mingzhe Zhang

2017-06-19 Paper

DOI: 10.1039/C7CP02481A

Editorial of the PCCP themed issue on “Physical Chemistry for Life Sciences”

Christoph van Wüllen, Kirsten Schwing, Christoph Riehn, Markus Gerhards

2017-04-19 Editorial

DOI: 10.1039/C7CP90069D

Ab initio calculation of the attempt frequency of oxygen diffusion in pure and samarium doped ceria

Julius Koettgen, Tobias Zacherle

2017-03-24 Paper

DOI: 10.1039/C6CP04802A

Local rotational symmetry in the packing of uniform spheres

Z. A. Tian, K. J. Dong, A. B. Yu

2017-05-10 Paper

DOI: 10.1039/C7CP01152K

Molecular organization in the twist–bend nematic phase by resonant X-ray scattering at the Se K-edge and by SAXS, WAXS and GIXRD

W. D. Stevenson, Z. Ahmed, X. B. Zeng, C. Welch, G. H. Mehl

2017-05-03 Communication

DOI: 10.1039/C7CP01404J

Loss channels in triplet–triplet annihilation photon upconversion: importance of annihilator singlet and triplet surface shapes

Victor Gray, Ambra Dreos, Paul Erhart, Bo Albinsson, Kasper Moth-Poulsen, Maria Abrahamsson

2017-04-05 Paper

DOI: 10.1039/C7CP01368J

Unusual molecular mechanism behind the thermal response of polypeptoids in aqueous solutions

Jianbo Ma, Sunting Xuan, Abby C. Guerin, Tianyi Yu, Donghui Zhang, Daniel G. Kuroda

2017-04-04 Paper

DOI: 10.1039/C6CP08536A

Investigating the optical properties of BOIMPY dyes using ab initio tools

Boris Le Guennic, Giovanni Scalmani, Michael J. Frisch, Adèle D. Laurent

2017-03-28 Paper

DOI: 10.1039/C7CP01190C

Identifying electrochemical effects in a thermal–electrochemical co-driven system for CO2 capture

Guang X. Liu, Yun S. Yu, Ying T. Hong, Geoff G. X. Wang

2017-04-25 Paper

DOI: 10.1039/C7CP01035D

您可能还喜欢

化合物问答

4-[[6-(3-苯基苯基)-7H-嘌呤-2-基]氨基]苯磺酰胺(CAS号:2079895-42-2)适用哪些法规指南?

该化合物需遵循REACH法规以确保其安全使用和管理。同时,根据其潜在的生物降解性和毒性,也需要符合GHS分类中的相应要求。此外,若用于医药或食品相关领域,则还需...

2079895-42-24-{[6-(3-Biphenylyl)...
化合物问答

反式-度骨化醇(CAS号:74007-20-8)的物理化学性质是什么?

反式-度骨化醇是一种脂溶性维生素D3的衍生物,呈无色或白色结晶性粉末,不溶于水,溶于乙醇、丙酮、氯仿等有机溶剂。其分子式为C28H44O,分子量为404.65。...

74007-20-8trans-Doxercalcifero...
化合物问答

莲花掌苷(CAS号:59282-56-3)的市场或研究趋势如何?

莲花掌苷作为一种天然产物,近年来在抗炎、抗癌等生物活性研究方面显示出一定的潜力,因此市场需求逐渐增长。市场动态方面,随着天然产物开发的深入,预计该化合物的研究会...

59282-56-3Lindleyin
化合物问答

2-溴-6-(吡咯烷-1-基)吡啶-4-硼酸频那醇酯(CAS号:1150271-64-9)应用于哪些行业?

2-溴-6-(吡咯烷-1-基)吡啶-4-硼酸频那醇酯在医药领域有着广泛的应用,它可以用作药物合成中的中间体。此外,它还可以用于有机合成,特别是在构建复杂杂环化合...

1150271-64-92-Bromo-6-(1-pyrroli...
化合物问答

什么是methyl 2-(4-bromophenyl)-3-methylbutanoate(CAS号:1061284-70-5)?

methyl 2-(4-溴苯基)-3-甲基丁酸甲酯是一种化学物质,分子式为C12H13BrO2。它是一种有机化合物,具有一定的挥发性和易燃性。

1061284-70-52-(4-Bromo-phenyl)-3...
化合物问答

CJC1-295(CAS号:863288-34-0)的物理化学性质是什么?

CJC1-295是一种具有复杂肽链结构的化合物,其分子量约为1875 Da。该化合物在水中具有一定的溶解性,但在有机溶剂中的溶解性不佳。它是一种反应活性化合物,...

863288-34-0L-tyrosyl-D-alanyl-L...
化合物问答

三正丁基锍碘(CAS号:18146-62-8)的市场或研究趋势如何?

三正丁基锍碘作为一种重要的有机硫化合物,主要用于有机合成中作为亲电试剂。近年来,由于其在合成中的广泛应用,市场对其需求持续增长。此外,随着绿色化学的发展,对其替...

18146-62-8Tributylsulfonium io...
化合物问答

雌二醇-[13C3]同位素内标(CAS号:1261254-48-1)通常如何合成?

雌二醇-[13C3]同位素内标通常通过在雌二醇分子中引入[13C3]同位素来合成。常见的方法是通过化学标记反应,如与[13C3]标记的甲基溴化物进行亲核取代反应...

1261254-48-117beta-Estradiol-2,3...
化合物问答

N1-(2-吡啶甲基)-N2-(2-甲基-1-萘基)草酰胺(CAS号:2611225-93-3)的物理化学性质是什么?

N1-(2-吡啶甲基)-N2-(2-甲基-1-萘基)草酰胺为固体化合物,具有良好的结晶形态,分子量为340.34 g/mol。该化合物在水中的溶解度较低,但在有...

2611225-93-3N-(2-Methyl-1-naphth...
化合物问答

如何处理含有十五碳烯酸甲酯(顺-10)(C15:1)标准品(CAS号:90176-52-6)的废料?

含有十五碳烯酸甲酯(顺-10)(C15:1)标准品的废料应首先进行适当收集和储存,避免与其他化学品混合。然后,可采用焚烧或交由专业废物处理公司进行处理。处理过程...

90176-52-6(Z)-10-Pentadecenoic...

来源期刊

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
自引率: 10.3%
年发文量: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

推荐供应商

免责声明
本页面提供的学术期刊信息仅供参考和研究使用。我们与任何期刊出版商均无关联,也不处理投稿事宜。如有投稿相关咨询,请直接联系相关期刊出版商。
如发现页面信息有误,请发送邮件至 support@chemtradehub.com 联系我们。我们将及时核实并处理您的问题。