Adam H. Clark
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View article: Tracking the Dynamic and Interactive Metal Oxidation Changes in CoFe, CoNi, and NiFe Bimetallic Hydroxides for Electrocatalytic Oxygen Evolution
Tracking the Dynamic and Interactive Metal Oxidation Changes in CoFe, CoNi, and NiFe Bimetallic Hydroxides for Electrocatalytic Oxygen Evolution Open
Bimetallic hydroxides based on iron group metals (i.e., Fe, Co, and Ni) are well‐known electrocatalysts for the oxygen evolution reaction (OER). Tremendous efforts have been devoted to investigating their structural and electronic changes …
View article: Mechanistic Insights into the Electroreduction of Carbon Dioxide to Formate on Palladium
Mechanistic Insights into the Electroreduction of Carbon Dioxide to Formate on Palladium Open
The electrochemical reduction of carbon dioxide (or the CO2-reduction reaction, CO2RR) presents a promising strategy to mitigate CO2 emissions while producing valuable chemical feedstocks. Palladium (Pd) catalysts are particularly interest…
View article: From Operando Investigations to Implementation of Ni‐MOF‐74 Oxygen Evolution Electrocatalysts
From Operando Investigations to Implementation of Ni‐MOF‐74 Oxygen Evolution Electrocatalysts Open
Metal‐organic frameworks (MOFs) as electrocatalysts for the alkaline oxygen evolution reaction (OER) show promising catalytic activity by offering great variability and high surface areas, enabling performance optimization and mechanistic …
View article: Monitoring the Activation of a AuCu Aerogel CO<sub>2</sub>-Reduction Electrocatalyst via <i>Operando</i> XAS
Monitoring the Activation of a AuCu Aerogel CO<sub>2</sub>-Reduction Electrocatalyst via <i>Operando</i> XAS Open
The electrochemical reduction of CO2 is a promising approach to mitigate global warming by converting CO2 into valuable industrial chemicals such as CO. Among the various CO2-electroreduction catalysts investigated, AuCu alloys have proven…
View article: Operando X‐Ray Absorption and Diffraction Investigations on Ni‐ and Co‐MOF‐74 Oxygen Evolution Electrocatalysts
Operando X‐Ray Absorption and Diffraction Investigations on Ni‐ and Co‐MOF‐74 Oxygen Evolution Electrocatalysts Open
Metal organic frameworks (MOFs) have a promising perspective as oxygen evolution reaction (OER) electrocatalysts due to their high surface areas and tunable structures. However, one of the main challenges for their further application is i…
View article: Unraveling the Kinetics of Hydride Formation and Decomposition at Pd–Au Bimetallic Interfaces: A Combined Spectroscopic and Computational Study
Unraveling the Kinetics of Hydride Formation and Decomposition at Pd–Au Bimetallic Interfaces: A Combined Spectroscopic and Computational Study Open
Supported Pd-Au bimetallic nanoparticles make up a promising class of catalysts used for hydrogenation and oxidation reactions. Recently, the role of dynamic restructuring of Pd regions at and near the nanoparticle surface in response to m…
View article: Confining Surface Oxygen Redox in Double Perovskites for Enhanced Oxygen Evolution Reaction Activity and Stability
Confining Surface Oxygen Redox in Double Perovskites for Enhanced Oxygen Evolution Reaction Activity and Stability Open
Nickel‐based double perovskites AA′BB′O 6 are an underexplored class of oxygen evolution reaction (OER) catalysts, in which B‐site substitution is used to tune electronic and structural properties. BaSrNiWO 6 , with a B‐site comprised of a…
View article: The role of Fe incorporation into Ni-MOF-74 derived oxygen evolution electrocatalysts for anion exchange membrane water electrolysis
The role of Fe incorporation into Ni-MOF-74 derived oxygen evolution electrocatalysts for anion exchange membrane water electrolysis Open
The Fe uptake influence on Ni-MOF-74 derived oxygen evolution electrocatalysts is studied bridging operando XAS studies with implementation in AEM-WE.
View article: Controlling the Mechanism of Nucleation and Growth Enables Synthesis of UiO‐66 Metal–Organic Framework with Desired Macroscopic Properties
Controlling the Mechanism of Nucleation and Growth Enables Synthesis of UiO‐66 Metal–Organic Framework with Desired Macroscopic Properties Open
By combining in situ X‐ray diffraction, Zr K‐edge X‐ray absorption spectroscopy and 1 H and 13 C nuclear magnetic resonance (NMR) spectroscopy, we show that the properties of the final MOF are influenced by H 2 O and HCl via affecting the …
View article: X-ray Spectroscopy at the SuperXAS and Debye Beamlines: from in situ to Operando
X-ray Spectroscopy at the SuperXAS and Debye Beamlines: from in situ to Operando Open
Understanding structure–performance relationships are essential for the rational design of new functional materials or in the further optimization of (catalytic) processes. Due to the high penetration depth of the radiation used, synchrotr…
View article: Spectroscopic Investigations of Complex Electronic Interactions by Elemental Doping and Material Compositing of Cobalt Oxide for Enhanced Oxygen Evolution Reaction Activity
Spectroscopic Investigations of Complex Electronic Interactions by Elemental Doping and Material Compositing of Cobalt Oxide for Enhanced Oxygen Evolution Reaction Activity Open
Doping and compositing are two universal design strategies used to engineer the electronic state of a material and mitigate its disadvantages. These two strategies are extensively applied to design efficient electrocatalysts for water spli…
View article: Time‐Resolved Oxidation State Changes Are Key to Elucidating the Bifunctionality of Perovskite Catalysts for Oxygen Evolution and Reduction
Time‐Resolved Oxidation State Changes Are Key to Elucidating the Bifunctionality of Perovskite Catalysts for Oxygen Evolution and Reduction Open
In a unified regenerative fuel cell (URFC) or reversible fuel cell, the oxygen bifunctional catalyst must switch reversibly between the oxygen reduction reaction (ORR), fuel cell mode, and the oxygen evolution reaction (OER), electrolyzer …
View article: Operando Tracking the Interactions between CoO<sub>x</sub> and CeO<sub>2</sub> during Oxygen Evolution Reaction
Operando Tracking the Interactions between CoO<sub>x</sub> and CeO<sub>2</sub> during Oxygen Evolution Reaction Open
CeO 2 greatly enhances the electrocatalytic oxygen evolution reaction (OER) activity of CoO x , though the enhancement mechanism beyond this synergy is yet to be understood. Here, operando hard X‐ray absorption spectroscopy (hXAS) is appli…
View article: Machine Learning for Quantitative Structural Information from Infrared Spectra: The Case of Palladium Hydride
Machine Learning for Quantitative Structural Information from Infrared Spectra: The Case of Palladium Hydride Open
Infrared spectroscopy (IR) is a widely used technique enabling to identify specific functional groups in the molecule of interest based on their characteristic vibrational modes or the presence of a specific adsorption site based on the ch…
View article: Delving into Fe-content effects on surface reconstruction of Ba<sub>0.50</sub>Sr<sub>0.50</sub>Co<sub>1−<i>x</i></sub>Fe<sub><i>x</i></sub>O<sub>3−<i>δ</i></sub> for the oxygen evolution reaction
Delving into Fe-content effects on surface reconstruction of Ba<sub>0.50</sub>Sr<sub>0.50</sub>Co<sub>1−<i>x</i></sub>Fe<sub><i>x</i></sub>O<sub>3−<i>δ</i></sub> for the oxygen evolution reaction Open
The Fe-content in Ba 0.50 Sr 0.50 Co 1− x Fe x O 3− δ directly influences the extent of surface reconstruction, and thus the oxygen evolution reaction (OER) performance in alkaline media, by controlling the stability of surface Co 2+ -atom…
View article: Designing bifunctional perovskite catalysts for the oxygen reduction and evolution reactions
Designing bifunctional perovskite catalysts for the oxygen reduction and evolution reactions Open
Design strategies for bifunctional catalysts are verified by investigating the catalysts’ activity and stability under reversible operation, as well as through operando investigation of the catalysts’ oxidation state.
View article: Cobalt-free layered perovskites RBaCuFeO<sub>5+<i>δ</i></sub> (R = 4f lanthanide) as electrocatalysts for the oxygen evolution reaction
Cobalt-free layered perovskites RBaCuFeO<sub>5+<i>δ</i></sub> (R = 4f lanthanide) as electrocatalysts for the oxygen evolution reaction Open
O K-edge XAS measurements reveal a surface reconstruction in RBaCuFeO 5+ δ layered perovskites when δ > 0. Oxygen excess, together with some degree of A-site cation intermixing, appears to control the OER activity in these Co-free electroc…
View article: Evidence of bifunctionality of carbons and metal atoms in catalyzed acetylene hydrochlorination
Evidence of bifunctionality of carbons and metal atoms in catalyzed acetylene hydrochlorination Open
Carbon supports are ubiquitous components of heterogeneous catalysts for acetylene hydrochlorination to vinyl chloride, from commercial mercury-based systems to more sustainable metal single-atom alternatives. Their potential co-catalytic …
View article: Evidence of bifunctionality of carbons and metal atoms in catalyzed acetylene hydrochlorination
Evidence of bifunctionality of carbons and metal atoms in catalyzed acetylene hydrochlorination Open
Enclosed we report the data in the article: "Evidence of bifunctionality of carbons and metal atoms in catalyzed acetylene hydrochlorination" by Pérez-Ramírez et al.
View article: The Role of Phosphate Functionalization on the Oxygen Evolution Reaction Activity of Cobalt‐Based Oxides at Different pH Values
The Role of Phosphate Functionalization on the Oxygen Evolution Reaction Activity of Cobalt‐Based Oxides at Different pH Values Open
Cobalt‐based oxides have attracted attention as active electrocatalysts for the oxygen evolution reaction (OER) in alkaline electrolytes. However, highly OER active catalysts at near‐neutral pHs are also desired for practical applications.…
View article: Deciphering the Mechanism of Crystallization of UiO‐66 Metal‐Organic Framework
Deciphering the Mechanism of Crystallization of UiO‐66 Metal‐Organic Framework Open
Zirconium‐containing metal‐organic framework (MOF) with UiO‐66 topology is an extremely versatile material, which finds applications beyond gas separation and catalysis. However, after more than 10 years after the first reports introducing…
View article: Surface Ir<sup>+5</sup> Formation as a Universal Prerequisite for O<sub>2</sub> Evolution on Ir Oxides
Surface Ir<sup>+5</sup> Formation as a Universal Prerequisite for O<sub>2</sub> Evolution on Ir Oxides Open
The large-scale deployment of polymer electrolyte water electrolysis (PEWE) is largely limited by the use of O2 evolution reaction (OER) catalysts based on scarce and expensive iridium in PEWE anodes. The ensuing need for better-performing…
View article: Ti-Doping in Silica-Supported PtZn Propane Dehydrogenation Catalysts: From Improved Stability to the Nature of the Pt–Ti Interaction
Ti-Doping in Silica-Supported PtZn Propane Dehydrogenation Catalysts: From Improved Stability to the Nature of the Pt–Ti Interaction Open
Propane dehydrogenation is an important industrial reaction to access propene, the world's second most used polymer precursor. Catalysts for this transformation are required to be long living at high temperature and robust toward harsh oxi…
View article: Controlling the Strong Metal‐Support Interaction Overlayer Structure in Pt/TiO<sub>2</sub> Catalysts Prevents Particle Evaporation
Controlling the Strong Metal‐Support Interaction Overlayer Structure in Pt/TiO<sub>2</sub> Catalysts Prevents Particle Evaporation Open
Platinum nanoparticles (NPs) supported by titania exhibit a strong metal‐support interaction (SMSI) [1] that can induce overlayer formation and encapsulation of the NP's with a thin layer of support material. This encapsulation modifies th…