Sammy Onajah

High-Throughput Experimentation for Accelerated Discovery of PGM-Free Catalysts for Anion-Exchange Membrane Water Electrolyzers

Ahmed A. Farghaly, Sammy Onajah, Marja Lalley, Wilton J. M. Kort-Kamp et autres

High-throughput experimentation is a powerful tool for accelerating the discovery and optimization of high-performance PGM-free oxygen evolution reaction (OER) catalysts for anion-exchange membrane water electrolysis. The sluggish OER kinetics limit several critically important sustainable energy technologies, including water electrolysis, metal-air batteries, and …

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Monovalent to Trivalent Materials: Catalyst Development in Electrolysis through Manipulation of the Complex Interface

Mai‐Anh Ha, Megan A. Cassingham, Andrew G. Norman, Melissa E. Kreider et autres

Electrocatalysis presents a challenging frontier for our physico-chemical understanding of the surface morphology and catalytic properties of a material: synthesis methods eschew the typical thermodynamically stable facets of (111) in metals and (110) in rutile MO 2 , often featuring a mixture …

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Monometallic, Bimetallic, and Trimetallic Oxyphosphides for OER Catalysis in Alkaline Electrolyte

Sammy Onajah, Marja Lalley, Melissa E. Kreider, Shaun M Alia et autres

The development of efficient and durable catalysts for the kinetically sluggish oxygen evolution reaction (OER) is paramount for advancing various electrochemical processes including water splitting, CO2 electroreduction, and metal air batteries. In this presentation, the synthesis, characterization, and electrochemical evaluation of monometallic, …

Machine Learning-Guided Discovery of PGM-Free Oxyphosphide Oxygen Evolution Catalysts for Alkaline Water Electrolysis

Ahmed A. Farghaly, Sammy Onajah, Marja Lalley, Wilton J. M. Kort-Kamp et autres

The sluggish kinetics of the oxygen evolution reaction (OER) create a bottleneck for many sustainable energy technologies, including water electrolysis, metal-air batteries, and electrochemical CO2 reduction reaction (CO2RR). While platinum group metal (PGM) catalysts like IrO2 and RuO2 exhibit high OER activity …

Unveiling the Activity-Electrochemically Active Surface Area Relationship in PGM-Free Oxyphosphide OER Electrocatalysts for Alkaline Water Electrolysis

Sammy Onajah, Marja Lalley, Melissa E. Kreider, Shaun M Alia et autres

The oxygen evolution reaction (OER) plays a pivotal role in various electrochemical processes, from water splitting to CO2 electroreduction and metal-air batteries. However, the sluggish kinetics of OER, involving multi-electron transfer, necessitate the development of catalysts with high activity and stability. While …

Accelerated Discovery of Multi-Metallic Nanostructured Catalysts for Anion Exchange Membrane Water Electrolyzers: Oxygen Evolution Reaction

Ahmed A. Farghaly, Sammy Onajah, Marja Lalley, Melissa E. Kreider et autres

The current reliance on platinum group metals (PGMs) as electrocatalysts for the oxygen evolution reaction (OER) in proton exchange membrane (PEM) water electrolyzers, the current industry standard, presents a significant barrier to the widespread adoption of hydrogen as a clean energy carrier. …

Silica‐Derived Nanostructured Electrode Materials for ORR, OER, HER, CO2RR Electrocatalysis, and Energy Storage Applications: A Review**

Sammy Onajah, Rajib Sarkar, Md. Shafiul Islam, Marja Lalley et autres

Abstract Silica‐derived nanostructured catalysts (SDNCs) are a class of materials synthesized using nanocasting and templating techniques, which involve the sacrificial removal of a silica template to generate highly porous nanostructured materials. The surface of these nanostructures is functionalized with a variety of …

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