In Situ Study of the Gas‐Phase Electrolysis of Water on Platinum by NAP‐XPS

Arrigo, Rosa; Hävecker, Michael; Schuster, Manfred Erwin; Ranjan, Chinmoy; Stotz, Eugen; Knop‐Gericke, Axel; Schlögl, Robert

doi:10.1002/anie.201304765

Cited by 146 publications

(172 citation statements)

References 32 publications

(38 reference statements)

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“…The surface undergoes a clear reconstruction upon OER conditions transitioning from a at metallic surface at OCP and low applied potentials (as conrmed by the low surface roughness (SR) values) to a high surface area oxidic system aer catalytic conditions, characterized by a much higher SR then the pristine surface. Therefore, we believe that the so-called "gelly structure" reported in literature for Pt surfaces under OER conditions in acidic electrolytes, 27,43,44 also occurs when the reaction is driven in alkaline environments. Using the previously described simulations, we can investigate the chemistry of the mesoporous ("gelly") structure, which is composed of a Pt Fig.…”

Section: Evolution Of Pt Surface Chemistry As a Function Of The Applimentioning

confidence: 99%

“…Moving towards realistic operating conditions, Arrigo et al recently studied Pt nanoparticles deposited on an acidic-polymer membrane using ambient pressure X-ray photoelectron spectroscopy (APXPS) in a humidied (solid/gas interface) environment. 27 The authors found that the rst stage of Pt oxidation involves the formation of a surface Pt oxide 27,33 where atomic oxygen (O) is weakly bound to Pt (Pt-O).…”

Section: Introductionmentioning

confidence: 99%

“…[8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] Ultimately, the scope of these studies is to expedite the development of novel and cost-effective catalysts with tailored physical/chemical properties, capable of achieving, if not surpassing, the Pt electrocatalytic performance. 8,[24][25][26][27] Previous studies have been conducted to indentify the role of Pt oxides in the oxygen evolution reaction pathway (also known as oxygen discharge).…”

Section: Introductionmentioning

confidence: 99%

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Elucidating the alkaline oxygen evolution reaction mechanism on platinum

et al. 2017

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Understanding the interplay between surface chemistry, electronic structure, and reaction mechanism of the catalyst at the electrified solid/liquid interface will enable the design of more efficient materials systems for sustainable energy production. The substantial progress in operando characterization, particularly using synchrotron based X-ray spectroscopies, provides the unprecedented opportunity to uncover surface chemical and structural transformations under various (electro)chemical reaction environments. In this work, we study a polycrystalline platinum surface under oxygen evolution conditions in an alkaline electrolyte by means of ambient pressure X-ray photoelectron spectroscopy performed at the electrified solid/liquid interface. We elucidate previously inaccessible aspects of the surface chemistry and structure as a function of the applied potential, allowing us to propose a reaction mechanism for oxygen evolution on a platinum electrode in alkaline solutions.

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Section: Evolution Of Pt Surface Chemistry As a Function Of The Applimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Elucidating the alkaline oxygen evolution reaction mechanism on platinum

et al. 2017

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“…Theory has studied the reaction [73,83] in detail. Experiments reveal that the working electrode is of complex chemical composition [84,85] with still unknown assignments of function of the various components. Advanced nanotechnology [86][87][88] tries to minimize the use of precious metals in the functional materials but is confronted with even larger challenges of stability of the system.…”

Section: The Chemical Toolbox Of Cecmentioning

confidence: 99%

Sustainable Energy Systems: The Strategic Role of Chemical Energy Conversion

Schlögl

2016

Top Catal

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In our globalized economy a multitude of energy systems are in operation. They present quite different structures and targets despite their common goal of supplying the energy needs for all societal activities reflecting the different boundary conditions of respective societies. The common quest for sustainability has given renewable electricity and ''solar fuels'' a high attention. The paper describes some underlying systemic aspects of integrating renewable with fossil energy and makes the point that without chemical energy conversion (CEC) this target will not be possible. A non-exhaustive list of grand challenges in CEC is derived. Some aspects of chemical energy science are discussed.

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“…The challenges are the same if this is done directly by photoelectro-catalysis or by electrolysis. Not issues of technical optimization but fundamental challenges in the understanding of the elementary steps during water splitting [25] are here the challenges.…”

Section: Epj Web Of Conferencesmentioning

confidence: 99%

Systemic aspects of the transition to sustainable energy

Schlögl

2015

EPJ Web of Conferences

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Summary. -The supply of free energy to our societies is today an intricate system comprising the regimes of technologies, regulatory frameworks, socio-economic impacts and techno-ecological interactions. As a consequence it is challenging to define clear directions or even device a master plan for the transformation of a single national energy system into a sustainable future. Even the term "sustainable" needs extensive discussion in this context that should not be defined solely in technological or ecological senses. The contribution illustrates some of the elements of the energy system and their interdependencies. It will become clear that multiple reasons exist to change the traditional generation and use of energy even when climate protection is not a sufficiently strong argument for a change.The desire to transform national energy systems into more sustainable forms is a growing global trend. The motivations behind this are, however, quite different. In Germany the dominant official driving force is the desire to contribute to climate protection. As the greenhouse gas emission (GHG) of Germany is limited (about 3%), the direct effect of national measures remains small. The German GHG emissions are of the same order of magnitude as the GHG emissions of single large industrial processes in the world

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In Situ Study of the Gas‐Phase Electrolysis of Water on Platinum by NAP‐XPS

Cited by 146 publications

References 32 publications

Elucidating the alkaline oxygen evolution reaction mechanism on platinum

Elucidating the alkaline oxygen evolution reaction mechanism on platinum

Sustainable Energy Systems: The Strategic Role of Chemical Energy Conversion

Systemic aspects of the transition to sustainable energy

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