journal article·2021-06-22Open access

Single-Step Direct Laser Writing of Multimetal Oxygen Evolution Catalysts from Liquid Precursors

Shannon McGee, Yu Lei, James Goff, Collin J. Wilkinson, Nabila Nabi Nova, Cody Matthew Kindle, Fu Zhang, Kazunori Fujisawa, Edgar Dimitrov, Susan B. Sinnott, Ismaila Dabo, Mauricio Terrones, Lauren D. Zarzar

ACS Nano· Volume 15· Issue 6

Abstract

We investigate a laser direct-write method to synthesize and deposit metastable, mixed transition metal oxides and evaluate their performance as oxygen evolution reaction catalysts. This laser processing method enabled the rapid synthesis of diverse heterogeneous alloy and oxide catalysts directly from cost-effective solution precursors, including catalysts with a high density of nanocrystalline metal alloy inclusions within an amorphous oxide matrix. The nanoscale heterogeneous structures of the synthesized catalysts were consistent with reactive force-field Monte Carlo calculations. By evaluating the impact of varying transition metal oxide composition ratios, we created a stable Fe0.63Co0.19Ni0.18Ox/C catalyst with a Tafel slope of 38.23 mV dec–1 and overpotential of 247 mV, a performance similar to that of IrO2. Synthesized Fe0.63Co0.19Ni0.18Ox/C and Fe0.14Co0.46Ni0.40Ox/C catalysts were experimentally compared in terms of catalytic performance and structural characteristics to determine that higher iron content and a less crystalline structure in the secondary matrix decrease the charge transfer resistance and thus is beneficial for electrocatalytic activity. This conclusion is supported by density-functional theory calculations showing distorted active sites in ternary metal catalysts are key for lowering overpotentials for the oxygen evolution reaction.
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Research context

OpenAlex topics: Electrocatalysts for Energy Conversion · Catalytic Processes in Materials Science · Semiconductor materials and devices

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States

Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, United States

Center for Atomically Thin Multifunctional Coatings, The Pennsylvania State University, University Park, Pennsylvania 16802, United States

Center for 2-Dimensional and Layered Materials, The Pennsylvania State University, University Park, Pennsylvania 16802, United States

Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States

Research Initiative for Supra-Materials, Shinshu University, Wakasato 4-17-1, Nagano 380-8553, Japan

Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, United States

Penn State Institutes of Energy and the Environment, The Pennsylvania State University, University Park, Pennsylvania 16802, United States

Funding

Basic Energy Sciences · David and Lucile Packard Foundation · Division of Materials Research · Institutes of Energy and the Environment, Penn State University

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