Improving the photoactivity of bismuth vanadate thin film photoanodes through doping and surface modification strategies

Currently, one of the most attractive and desirable ways to solve the energy challenge is harvesting energy directly from the sunlight through the so-called artificial photosynthesis. Among the ternary oxides based on earth–abundant metals, bismuth vanadate has recently emerged as a promising photoanode. Herein, BiVO4 thin film photoanodes have been successfully synthesized by a modified metal-organic precursor decomposition method, followed by an annealing treatment. In an attempt to improve the photocatalytic properties of this semiconductor material for photoelectrochemical water oxidation, the electrodes have been modified (i) by doping with La and Ce (by modifying the composition of the BiVO4 precursor solution with the desired concentration of the doping element), and (ii) by surface modification with Au nanoparticles potentiostatically electrodeposited. La and Ce doping at concentrations of 1 and 2 at% in the BiVO4 precursor solution, respectively, enhances significantly the photoelectrocatalytic performance of BiVO4 without introducing important changes in either the material structure or the electrode morphology, according to XRD and SEM characterization. In addition, surface modification of the electrodes with Au nanoparticles further enhances the photocurrent as such metallic nanoparticles act as co-catalysts, promoting charge transfer at the semiconductor/solution interface. The combination of these two complementary ways of modifying the electrodes has resulted in a significant increase in the photoresponse, facilitating their potential application in artificial photosynthesis devices.

Dynamical Equations For The Period Vectors In A Periodic System Under Constant External Stress

The purpose of this paper is to derive the dynamical equations for the period vectors of a periodic system under constant external stress. The explicit starting point is Newton’s second law applied to halves of the system. Later statistics over indistinguishable translated states and forces associated with transport of momentum are applied to the resulting dynamical equations. In the final expressions, the period vectors are driven by the imbalance between internal and external stresses. The internal stress is shown to have both full interaction and kinetic-energy terms.

Current Challenges regarding the International Refugee Law, with focus on EU Policies and EU Co-operation with UNHCR. CEPS Paper on Liberty and Security in Europe No. 59, September 2013

From an examination of the instruments of the Common European Asylum System (CEAS) and related policy measures regarding border surveillance and migration management, two interrelated issues stand out as particularly sensitive: Access to asylum and responsibility for refugee protection. The prevailing view, supported by UNHCR and others, is that responsibility for the care of asylum seekers and the determination of their claims falls on the state within whose jurisdiction the claim is made. However, the possibility to shift that responsibility to another state through inter-state cooperation or unilateral mechanisms undertaken territorially as well as abroad has been a matter of great interest to EU Member States and institutions. Initiatives adopted so far challenge the prevailing view and have the potential to undermine compliance with international refugee and human rights law. This note reviews EU action in the field by reference to the relevant legal standards and best practices developed by UNHCR, focusing on the specific problems of climate refugees and access to international protection, evaluating the inconsistencies between the internal and external dimension of asylum policy. Some recommendations for the European Parliament are formulated at the end, including on action in relation to readmission agreements, Frontex engagement rules in maritime operations, Regional Protection Programmes, and resettlement.

The ‘Lisbonisation’ of the European Parliament: Assessing progress, shortcomings and challenges for democratic accountability in the area of freedom, security and justice. CEPS Paper on Liberty and Security in Europe No. 58, September 2013

This paper examines the performance of the European Parliament in EU AFSJ law and policy-making from the entry into force of the Lisbon Treaty until the end of the first half of 2013. The paper situates the EP in the new post-Lisbon institutional setting, documenting its transition to ‘AFSJ decision-maker’, and its new powers to shape and make policy covering the EU’s internal and external security agenda. While the paper finds that the EP has become an active co-owner of the EU AFSJ post-Lisbon, with the Parliament demonstrating a dynamic adjustment to its new post-Lisbon role and powers, the authors identify a set of new developments and challenges that have arisen in the conduct of democratic accountability by the EP in the AFSJ since 2009, which call for critical reflection ahead of the new parliamentary term 2014-2019 and the post-2014 phase of the EU’s AFSJ.

The Common Agricultural Policy: The Future of the CAP and why real reform will never happen. EUMA Paper Vol. 6 No. 7, May 2010

This paper sets out to examine the Common Agricultural Policy (CAP) of the European Union from its inception to present day 1. Specifically, this paper seeks to answer the following questions: (1) What long-term effects, if any, did the circumstances surrounding, and leading up to the formation of the CAP have; (2) What have internal and external responses been to the CAP; (3) How has the CAP responded to major events both internally (within the European Union), and externally (internationally); (4) What affect does the recently implemented Lisbon Treaty2 have on the CAP, and (5) What is the future of the CAP and CAP reform? In order to answer these questions this paper begins with the contention that the CAP is in fact the largest and strongest driving force of EU expansion. In support of this proposition, this paper first examines the circumstances and events leading to the creation of the CAP in the European Community. Second, this paper examines what long-term effects the circumstances surrounding the CAP’s inception have had on the policy, particularly calling attention to the disproportionate Franco-German CAP benefits. Third, the paper then examines how the CAP has responded to historical events that have had significant effects on the European community, particularly EU expansion, the implementation of the Lisbon Treaty, and the recent worldwide economic crisis. Finally, this paper examines common criticisms of and conflicts surrounding the CAP, both internally and externally, and argues that CAP reform, at least within the current institutional framework of the European Union, can never truly occur.

National Minorities, Nationalizing States, and External National Homelands in the New Europe. Notes toward a Relational Analysis. Institute of Advanced Studies Political Science Series, 11 December 1993

Nationalism remains central to politics in and among the new nation-states. Far from »solving« the region's national question, the most recent reconfiguration of political space – the replacement of the Soviet Union, Yugoslavia, and Czechoslovakia by some twenty would-be nation-states – only recast it in a new form. It is this new phase and form of the national question that I explore in this paper. I begin by outlining a particular relational configuration – the triadic relational nexus between national minorities, nationalizing states, and external national homelands – that is central to the national question in post-Soviet Eurasia. In the second, and most substantial, section of the paper, I argue that each of the »elements« in this relational nexus – minority, nationalizing state, and homeland – should itself be understood in dynamic and relational terms, not as a fixed, given, or analytically irreducible entity but as a field of differentiated positions and an arena of struggles among competing »stances.« In a brief concluding section, I return to the relational nexus as a whole, underscoring the dynamically interactive quality of the triadic interplay.

To Be or Not to Be a Normative Power: The EU’s Promotion of Human Rights and Democracy in Russia. Bruges Regional Integration & Global Governance Papers 2/2013

The ‘Normative Power Europe’ debate has been a leitmotif in the academic discourse for over a decade. Far from being obsolete, the topic is as relevant as when the term was first coined by Ian Manners in 2002.1 ‘To be or not to be a normative power’ is certainly one of the existential dilemmas in the foreign policy of the European Union. This paper, however, intends to move beyond the black-and-white debate on whether the European Union is a normative power and to make it more nuanced by examining the factors that make it such. Contrary to the conventional perception that the European Union is a necessarily ‘benign’ force in the world, it assumes that it has aspirations to be a viable international actor. Consequently, it pursues different types of foreign policy behaviour with a varying degree of normativity in them. The paper addresses the question of under what conditions the European Union is a ‘normative power’. The findings of the study demonstrate that the ‘normative power’ of the European Union is conditioned upon internal and external elements, engaged in a complex interaction with a decisive role played by the often neglected external elements.

The EU and ASEAN – In Search of a New Regional Paradigm? EU Centre Singapore Working Paper No. 15, August 2013

The European Union (EU) has been hailed as the most successful model of regional integration thus far, while the Association of Southeast Asian Nations (ASEAN), despite its fair share of critics and doomsayers, has been seen as a relatively successful regional organisation in the developing world. However, both seemed to have arrived at a critical juncture in their respective regional projects. Challenged by recent events, internal and external, and faced with increasing uncertainties and complexities, the EU and ASEAN are forced to re-examine the journey they have taken so far and ponder the road ahead. This paper seeks first to provide an overview of the two parallel processes of regionalism in Europe and Southeast Asia by focusing on the developments of the EU and ASEAN, and dissecting both the external forces and internal dynamics that shape the respective regional processes. It then sketches out some of the global trends likely to impact regional developments in Europe and Asia, and questions if the EU and ASEAN would need a new regional approach or paradigm if they are to maintain their salience and relevance as regional actors.

Challenges and new beginnings: Priorities for the EU’s new leadership. EPC Challenge Europe Issue 22, September 2014

THIS DOCUMENT CONTAINS A COLLECTION OF ARTICLES WHICH ARE AVAILABLE ON THE ARCHIVE AS SEPARATE ARTICLES. There has been a lot of attention on the current transition of power taking place in Brussels. The new EU leadership will be confronted with a number of internal and external challenges. They will have deal with economic stagnation, the negative effects of fragmentation and the need to increase the Union's legitimacy. There is no better moment to take stock of the ‘state of the Union’ and to look ahead into the next European political cycle (2014-2019), focusing not on personalities but on content: what challenges do we face and what should the EU focus on in the coming years? These new beginnings will encounter new challenges, and who better understands the issues than some of the key players in European politics. Challenge Europe brings these players together and explores what social, political and economic challenges are facing Europe, and its’ citizens.