Achieving a sustainable energy economy is undoubtedly one of the biggest challenges of the 21st century. The Higgins Lab at McMaster University focuses on addressing this challenge through the design, synthesis and characterization of novel nanomaterial catalysts, and their integration into electrochemical devices, such as fuel cells, batteries, electrolyzers or supercapacitors. Nanomaterial catalysts and electrochemical devices will be integral parts of a sustainable energy economy, as they will enable the interconversion of electrical and chemical energy. Put simply, they harness renewable sources of electricity (wind, solar, hydro) to produce the fuels and chemicals that society depends upon.
Students in the Higgins group apply catalyst design principles (i.e., an understanding of what makes a catalyst good) to synthesize nanomaterial catalysts designed on the atomic scale to possess desirable structures and properties. The nanomaterial catalysts are then tested for electrochemical activity towards small molecule conversions, focusing on the use of environmentally abundant molecules as reactants (i.e., O2, N2, H2O, CH4) to produce fuels, chemicals and fertilizers. Catalyst structure-property-performance relationships are established through extensive spectroscopic and microscopic nanomaterial characterization using advanced techniques available at McMaster University, including at the state-of-the-art Canadian Centre for Electron Microscopy facilities. Best in class nanomaterial catalysts are integrated into working electrochemical device prototypes that are engineered for performance validation and demonstration.
Some of the current electrochemical reactions and technologies of interest in the Higgins group include:
Electrochemical reduction of CO2 to produce carbon-based fuels and feedstock chemicals
Operando / in situ characterization of electrocatalyst and electrode materials
Rechargeable Zn-ion batteries for grid scale energy storage
Water electrolyzers for sustainable hydrogen production
Low temperature fuel cells for transportation application
Electrochemical production of hydrogen peroxide for water treatment applications
Electrochemical activation and conversion of natural gas to produce value added fuels and chemicals
Value added anodic processes
Keywords: Electrochemistry, electrocatalysis, CO2 conversion, fuel cells, electrolysis, nanomaterials, sustainable energy, energy conversion and storage, operando characterization, in situ characterization, X-ray absorption spectroscopy, transmission electron microscopy, batteries, supercapacitors
We are looking for a qualified Postdoctoral Fellow to lead our research efforts on in situ / operando characterization of electrocatalysts by TEM and XAS. For details on how to apply, please refer to the position posting here.
We recently published a perspective piece on the challenges and opportunities for generating fundamental knowledge and achieving technological progress toward the development of practical CO2 electrolyzers.
Higgins, Hahn, Xiang, Jaramillo, Weber, Gas-Diffusion Electrodes for Carbon Dioxide Reduction: A New Paradigm, ACS Energy Letters (2019) 4, 317.
Higgins, Wette, Gibbons, Siahrostami, Hahn, Escudero-Escribano, Garcia-Melchor, Ulissi, Davis, Mehta, Clemens, Nørskov, Jaramillo, Copper Silver Thin Films with Metastable Miscibility for Oxygen Reduction Electrocatalysis in Alkaline Electrolytes, ACS Applied Energy Materials (2018) 5, 1990.