MRS Meetings and Events


EN07.12.04 2023 MRS Fall Meeting

3D Printed Continuous Nanoporous Cu/CuOx Electrodes for Highly Efficient Hydrogen Evolution Reaction

When and Where

Dec 1, 2023
9:00am - 9:15am

Hynes, Level 3, Room 310



Anand Tiwari1,William J. Scheideler1

Dartmouth College1


Anand Tiwari1,William J. Scheideler1

Dartmouth College1
The sluggish kinetics of electrocatalysts in alkaline media cause stability as well as low active site issues, restricting the conversion of renewable energy into hydrogen. Synergistic enhancements such as the formation of free-standing nanoporous heterostructures, homogeneous diffusion of active materials into conductive supports, and atomic doping/defecting of active materials could promise to improve the kinetics and resolve key stability issues. Herein, we present scalable 3D-printing of continuous nanoporous Cu/CuO<sub>x </sub>diffused carbon electrocatalysts for efficient alkaline hydrogen evolution reaction (HER) in which Cu/CuO<sub>x </sub>acts as active sites, nanoporous carbon provides a higher conductive surface area to enhance HER kinetics, and periodic 3D lattice micro-structuring facilitates bubble evolution to improve stability. The resulting micro-architected porous electrodes deliver high electrocatalytic activity for HER, with an overpotential of 155 mV at a current density of 10 mA/cm<sup>2</sup> and a Tafel slope of 134 mV/dec, outperforming other 3D noble metal-free oxide materials. In addition, the as-fabricated catalysts also showed superior durability: up to 240 hours of continuous hydrogen evolution without any significant change in overpotential and current density, which is 10X better than reported 3D-printed catalysts. Our comparative analysis of multiple 3D lattice geometries indicates that our 3D-ordered nanoporous Cu/CuOx electrocatalysts maximize performance by exposing more active sites and allowing faster discharge of H<sub>2</sub> gas bubbles through engineered microchannels. We will finally discuss how our micro-architected approach to transforming 3D-printed lattices can be applied to a variety of earth-abundant electrocatalysts based on transition metal/metal oxides for enhancing performance and stability of additional reactions including OER.



Symposium Organizers

Maria Escudero-Escribano, Catalan Institute of Nanoscience and Nanotechnology
Charles McCrory, University of Michigan
Sen Zhang, University of Virginia
Haotian Wang, Rice University

Symposium Support

ACS Energy Letters | ACS Publications
Chem Catalysis | Cell Press
EES Catalysis | Royal Society of Chemistry
Gamry Instruments
Renewables | Chinese Chemical Society Publishing
Scribner LLC

Publishing Alliance

MRS publishes with Springer Nature