2019 MRS Spring Meeting & Exhibit

Symposium ES11-Advanced Low Temperature Water-Splitting for Renewable Hydrogen Production via Electrochemical and Photoelectrochemical Processes

As the level of deployment and utilization of renewable energy sources, including wind and solar, continues to rise, large-scale, long-term energy storage technologies that could accommodate weekly and seasonally energy fluctuations will play a significant role in the overall deployment of renewable energies in the future. Storing renewable electrons, using either electrochemical or photoelectrochemical processes, in the form of chemical bonds, e.g., fuels, has the potential to meet the long-term, terra-watt scale energy storage challenge. Renewable hydrogen, in particular, is a centerpiece for renewable fuel production and deep de-carbonization of multiple sectors in our society. Cost-competitive renewable hydrogen can be directly used in the transportation sector for fuel cell cars, in the electric grid sector for electricity firming and load balancing and in the industry sector for metal refineries or biomass upgrading. In addition, coupling with the carbon and nitrogen cycles, renewable hydrogen can be readily processed with known and well-established thermal-chemical processes to generate hydrocarbon fuels and ammonia. Low temperature electrolysis (LTE) and photoelectrochemical (PEC) water-splitting are two different approaches for producing low cost, renewable hydrogen at scale. In LTE, renewable electrons (either from wind or solar for instance) are directed into a membrane electrode assembly with well-engineered reactant and product transport pathways for efficient and stable production of hydrogen. To minimize the device cost, the operating current density of the electrolysis unit often exceeds 1 A cm-2. In PEC water-splitting, hydrogen is directly produced from sunlight in an integrated photoelectrochemical unit, in which synergistic assembly of light absorbers, electrocatalysts, membrane separators and electrolytes are required for efficient and stable hydrogen production. The operating current density of PEC cell is in the range of 10 mA cm-2 without solar concentration to 100 mA cm-2 with solar concentration. While LTE and PEC approaches currently have very different technical readiness level and very different system-level design spaces for future deployment, the two low temperature hydrogen production approaches have many commonalities at the materials level and component level that could potentially benefit from cross-fertilization.

This symposium aims to bring together researchers with diverse disciplines from both the LTE and PEC communities to present and discuss recent advances in the field. Presentations will focus on both fundamental materials discoveries and device level challenges. This symposium will highlight advanced materials characterization, synergistic theory-experiment coupling, and standard protocol developments. Topics will include compound semiconductors for high efficiency solar water-splitting, membrane and electrolyte engineering, high-throughput calculation and experimentation, light materials interaction, advanced photoelectrochemical science, interfacial charge transfer, plasma induced processes, and corrosion science. This symposium will facilitate cross-cutting discussions between the two approaches. Researchers with different expertise attending this symposium will be able to learn from each other and will be exposed to a variety of cross-cutting opportunities for new materials and device developments.

Topics will include:

  • Charge transfer and corrosion at the semiconductor/electrolyte interface
  • Transport
  • Corrosion of MEA components in LTE systems
  • HER and OER catalysts for LTE and PEC systems
  • Best practices, standardization, and benchmarking
  • High-throughput methods
  • Multi-scale modeling
  • Materials screening and characterization
  • Materials integration and interactions
  • In situ and operando analysis
  • Accelerated stress tests
  • Synthetic methods for high activity electrocatalysts
  • Ion selective membranes and property tuning

Invited Speakers:

  • Zetian Mi (McGill University, Canada)
  • Aditya Mohite (Rice University, USA)
  • Hui Xu (Giner Inc., USA)
  • Peter Strasser (Technical University of Berlin, Germany)
  • Shaun Alia (National Renewable Energy Laboratory, USA)
  • Charles Dismukes (Rutgers University, USA)
  • Nicolas Gaillard (Hawaii Natural Energy Institute, USA)
  • Sophia Haussener (École Polytechnique Fédérale de Lausanne, Switzerland)
  • Chung Yin Ho (City University of Hong Kong, Hong Kong)
  • Gaoren Li (Sun Yat-sen University, China)
  • Hui Li (Southern University of Science and Technology, China)
  • Zhigang Shao (Dalian Institute of Chemical Physics, China)
  • Peikang Shen (Guangxi University, China)
  • Ifan Stephans (Imperial College London, United Kingdom)
  • Wei Xing (Changchun Institute of Applied Chemistry, China)

Symposium Organizers

Chengxiang Xiang
California Institute of Technology

Katherine Ayers
Proton OnSite

Todd Deutsch
National Renewable Energy Laboratory

Changfeng Yan
Chinese Academy of Sciences
Guangzhou Institute of Energy Conversion

Publishing Alliance

MRS publishes with Springer Nature