Thomas P. Moffat

Atomic Layer Electrodeposition of a Pt Monolayer on Au via Surface-Specific PtCl42 – Adsorption

Hyunki Kim, Thomas P. Moffat

Abstract Atomic layer deposition of Pt monolayer films on Au is demonstrated based on the irreversible adsorption of square planar PtCl42–aq in the flat configuration, followed by reduction at low overpotentials in NaCl-based electrolytes. The strong affinity of PtCl42–aq for Au at …

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Factors Influencing Initial Stages of Cobalt Electrodeposition

Eric D. Rus, David Raciti, Evan Jahrman, Thomas P. Moffat

A cobalt deposition process occurs at potentials more positive than bulk deposition at certain electrode materials, including platinum and gold. 1 , 2 This process may be of importance in feature filling with Co for advanced interconnect applications. It is distinct from …

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Atomic Layer Electrodeposition of Pt Films on Au Via Irreversible [PtCl 4 ] 2– In Cl - Containing Electrolytes

Hyunki Kim, Eric D. Rus, Thomas P. Moffat

An atomic layer electrodeposition strategy has been developed for the 2-D growth of Pt films on Au substrates, exploiting the irreversible adsorption of [PtCl 4 ] 2- and its subsequent reduction to metallic Pt. In Cl - -containing electrolytes, the selective adsorption …

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Improved Uniformity in Glass TSV Filling by Asymmetric Dwell Pulsed Potential Deposition

Youjung Kim, Eunsoo Shim, Ji Young Young Park, Matthew S. Weimer et autres

Filling of through vias in glass interposers is explored using an acid copper sulfate electrolyte containing dilute chloride and a polyether suppressor additive. Cyclic voltammetry with a rotating disk electrode shows that suppression breakdown and hysteresis is associated with an S-shaped negative …

O 2 Reduction Stimulates Adatom Generation on Cu(111) Catalyzing Hydrogen Evolution

David Raciti, Zisheng Zhang, Ally Guo, Thomas P. Moffat

High Resolution Image Download MS PowerPoint Slide Electrochemical mass spectrometry (EC-MS) was used to investigate the coupled dynamics of surface hydride formation, the oxygen reduction reaction (ORR), and the hydrogen evolution reaction (HER) on Cu(111) in perchloric acid. Starting with an Ar-saturated …

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Dataset from J. Am. Chem. Soc. paper: O2 Reduction Stimulates Adatom Generation on Cu(111) Catalyzing Hydrogen Evolution

David Raciti, Zisheng Zhang, Ally Guo, Thomas P. Moffat

Dataset from J. Am. Chem. Soc. paper: O2 Reduction Stimulates Adatom Generation on Cu(111) Catalyzing Hydrogen Evolution ensemble_gcga.zipASE databases of sampled structures from unconstrained and constrained GCGA searches, of H-covered and OH-covered Cu(111) with different surfaces Cu configurations. ensemble_ORR.zipASE databases of OH …

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Dataset from J. Am. Chem. Soc. paper: O2 Reduction Stimulates Adatom Generation on Cu(111) Catalyzing Hydrogen Evolution

David Raciti, Zisheng Zhang, Ally Guo, Thomas P. Moffat

Dataset from J. Am. Chem. Soc. paper: O2 Reduction Stimulates Adatom Generation on Cu(111) Catalyzing Hydrogen Evolution ensemble_gcga.zipASE databases of sampled structures from unconstrained and constrained GCGA searches, of H-covered and OH-covered Cu(111) with different surfaces Cu configurations. ensemble_ORR.zipASE databases of OH …

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Single-additive TSV filling achieved with a tris-ammonium-based suppressor

Haejin Kwak, Youngran Seo, Hui Won Eom, Thomas P. Moffat et autres

• A single-suppressor electrodeposition process enables defect-free TSV filling. • Single-suppressor gap-filling overcomes the limitations of typical three-additive methods. • A triazine-core molecule with three ammonium side chains is designed for TSV filling. • Selective breakdown of the suppressor at the TSV …

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O2 Reduction Stimulates Adatom Generation on Cu(111) Catalyzing Hydrogen Evolution

David Raciti, Zisheng Zhang, Ally Guo, Thomas P. Moffat

Electrochemical mass spectrometry (EC-MS) was used to investigate the coupled dynamics of surface hydride formation, the oxygen reduction reaction (ORR), and the hydrogen evolution reaction (HER) on Cu(111) in perchloric acid. Starting with an Ar-saturated electrolyte, hydride formation proceeds via two overlapping …

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Hydride Formation and Decomposition on Cu(111) in HClO4

David Raciti, Thomas P. Moffat

Cu electrodeposition and the electrocatalysis of hydrogenation reactions thereupon involve significant interactions with adsorbed hydrogen. Electrochemical mass spectrometry (EC-MS) is used to explore the formation and decomposition of surface hydride on Cu(111) in 0.1 mol L –1 HClO 4 . Hydride formation …

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Impact of uncompensated resistance on Hads-terminated Pt electrodeposition

Yihua Liu, M. C. Lafouresse, Ugo Bertocci, John E. Bonevich et autres

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(Invited) Understanding Catalytic Structure-Function Relationships via in-Situ Surface Stress Measurements of Electrodeposited Metal Films

David Raciti, Gery R. Stafford, Thomas P. Moffat

Ultrathin Pt films are emerging as promising catalysts for fuel cells and water electrolyzers, offering improved utilization of the costly metal and enhanced performance through catalyst-support or alloying interactions. Properly matched to a substrate, Pt overlayers exhibit significantly enhanced catalytic properties attributed …