Pseudocapacitance of zeolite-templated carbon in organic electrolytes

Carbon and graphene-based materials often show some amount of pseudocapacitance due to their oxygen-functional groups. However, such pseudocapacitance is generally negligible in organic electrolytes and has not attracted much attention. In this work, we report a large pseudocapacitance of zeolite-templated carbon (ZTC) based on the oxygen-functional groups in 1 M tetraethylammonium tetrafluoroborate dissolved in propylene carbonate (Et4NBF4/PC). Due to its significant amount of active edge sites, a large amount of redox-active oxygen functional groups are introduced into ZTC, and ZTC shows a high specific capacitance (330 F g−1). Experimental results suggest that the pseudocapacitance could be based on the formation of anion and cation radicals of quinones and ethers, respectively. Moreover, ZTC shows pseudocapacitance also in 1 M lithium hexafluorophosphate dissolved with a mixture of ethylene carbonate and diethyl carbonate (LiPF6/EC+DEC) which is used for lithium-ion batteries and lithium-ion capacitors.

Electrochemical Characterization of Shape-Controlled Pt Nanoparticles in Different Supporting Electrolytes

The voltammetric profile of preferentially shaped platinum nanoparticles has been used to analyze the different sites present on the surface. For the first time, this analysis has been made in NaOH solutions and revisited in sulfuric and perchloric acid media. The comparison with the voltammetric profiles of the model surfaces, that is, single-crystal electrodes, allows assigning the different signals appearing in the voltammograms of the nanoparticle to specific sites on the surface. A good correlation between the shape of the nanoparticle determined by TEM and the voltammetric profile is obtained. For the nanoparticles characterized in alkaline media, the adsorbed species on the surface have been characterized, and three major regions can be identified. Below 0.2 V, the major contribution is due to hydrogen adsorption, whereas above 0.6 V, adsorbed OH is the main species on the surface. Between those values, the signals are due to the competitive adsorption/desorption process of OH/H. New criteria for determining the active area in NaOH solutions has been proposed. In this medium, the total charge density measured between 0.06 and 0.90 V stands for 390 μC cm–2. The areas measured are in perfect agreement with those measured in acid media. Once the nanoparticles have been characterized, the behavior of the nanoparticles toward CO oxidation is analyzed and compared with that observed for single-crystal electrodes.

Strong governments, weak banks. CEPS Policy Brief No. 305, 25 November 2013

Banks in the northern eurozone have capital ratios that are, on average, less than half of the capital ratios of banks in the eurozone’s periphery. The authors explain this by the fact that northern eurozone banks profit from the financial solidity of their governments and follow business strategies aimed at issuing too much subsidised debt. In doing so, they weaken their balance sheets and become more fragile – less able to withstand future shocks. Paradoxically, financially strong governments breed fragile banks. The opposite occurs in countries with financially weak governments. In these countries banks are forced to strengthen themselves because they are unable to rely on their governments. As a result they have significantly more capital and reserves than banks in the northern eurozone. Recommendations More than in the south, the governments of northern Europe should stand up and force the banks to issue more equity. This should go much further than what is foreseen in the Basel III accord. If the experience of the southern eurozone countries is any guide, banks in the north of the eurozone should at least double the capital and the reserves as a percentage of their balance sheets. Failure to do so risks destroying the financial solidity of the northern European governments when, in the future, negative shocks force these governments to come to the rescue of their undercapitalised banks. The new responsibilities entrusted to the European Central Bank as the single supervisor in the eurozone create a unique opportunity for that institution to change the regulatory and supervisory culture in the eurozone – one that has allowed the large banks to continue living dangerously, with insufficient capital.

Addressing weak inflation: The European Central Bank's shopping list. Bruegel Policy Contribution 2014/05, May 2014

There are clear benefits to price stability. High inflation can distort corporate investment decisions and the consumption behaviour of households. Changes to inflation redistribute real wealth and income between different segments of society, such as savers and borrowers, or young and old. Price stability is therefore a fundamental public good and it became a fundamental principle of European Economic and Monetary Union. But the European Treaties do not define price stability. It was left to the Governing Council of the European Central Bank (ECB) to quantify it: "Price stability is defined as a year-on-year increase in the Harmonised Index of Consumer Prices (HICP) for the euro area of below 2%"[1]. The Governing Council has also clarified that it aims to maintain inflation below, but close to, two percent over the medium term, though it has not quantified what 'closeness' means, nor has it given a precise definition of the 'medium term'[2]. The clarification has been widely interpreted to mean that the actual target of the ECB is close to, but below, two percent inflation in the medium term.

A weak link? Germany in the Euro-Atlantic security system. OSW Point of View Number 47, January 2015

The political, military and economic parameters of German power influence the vision of the international order that Berlin favours. Politically, Germany is a regional power in the EU with considerable diplomatic potential. Economically, it is the world's third largest power with growing global trade and investment links. At the same time, Germany's military potential is limited and the German strategic culture makes the country sceptical about the use of military instruments. Berlin is thus essentially interested in maintaining peace and stability, both in Europe and globally, and in developing diplomatic mechanisms to manage regional and global crises and conflicts. The German preference for dialogue and compromise in conflict situations in the regional and global dimensions may increasingly pose a risk to maintaining the cohesion and credibility of NATO – both from the perspective of the USA and Germany’s allies from Central-Eastern and Northern Europe.

Feasibility of primary copper smelter weak sulfur dioxide stream control /

Mode of access: Internet.

Weak congruence relations on graphs /

Vita.

Weak, nonequilibrium, diffusive waves in a dissociated gas,

"This report is based on research sponsored by the U. S. Navy through the Office of Naval Research, Contract Nonr-2653(00) [Task NR 061-106]"

The cure of church-divisions: or, Directions for weak Christians, to keep them from being dividers, or troublers of the church. With some directions to the pastors, how to deal with such Christians.

Signatures: A-Z⁸, Aa-Gg⁸, Hh-Hh².

Conductibilites limites de 2 electrolytes binaires dans quelques dissolvants organiques : reactions photochimiques.

Thesis (doctoral)--Universite de Lausanne.

Electrical conductivity and viscosity of some fused electrolytes /

Thesis (doctoral)--University of Zurich, 1906.

Conductibilites limites de quelques electrolytes dans l'acetone...

Thesis (doctoral)--

Solutions of electrolytes, with particular application to qualitative analysis,

"International atomic weights, 1929" on lining-paper.