PhD Candidate in Mechanochemical Hydrogen Production in Natural Silica-Rich Rocks

PhD Position in Mechanochemical Hydrogen Production in Natural Silica-Rich Rocks

100%, Zurich, fixed-term

The ETH Zurich Geothermal Energy & Geofluids (GEG) Group in the Department of Earth and Planetary Sciences is dedicated to investigating subsurface reactive fluids and geothermal energy transfer. We employ a comprehensive approach, utilizing computer simulations, laboratory experiments, and field analyses to gain fundamental insights and develop sustainable technologies that serve societal needs.

Project Background

We are thrilled to announce an interdisciplinary PhD opportunity focused on mechanochemical processes that drive radical formation and redox cycling in the deep subsurface. This research has implications for geochemistry, geophysics, biogeochemistry, planetary habitability, and sustainable energy resources. The successful candidate will join an innovative research team exploring how crustal faulting, tectonics, and mineral fracturing generate reactive unpaired electron radical centers in silica-rich rocks. These silica radicals may react with water to produce natural hydrogen, reactive oxygen species, unique silica surface moieties, and various other products. Such processes may fuel microbial metabolisms and influence subsurface ecosystems. Moreover, the project may investigate the formation, accumulation, migration, and potential exploitation of natural hydrogen as a clean energy source.

This research addresses fundamental questions regarding mechanochemical reactions in natural materials, energy flow in Earth's deep environments, and its relevance to extraterrestrial settings and future energy strategies. For more information on this project, please visit: here.

Job Description

The PhD project will explore:

• Mechanochemical radical generation during rock fracturing and its role in water splitting to form hydrogen and reactive oxygen species
• Characterization of radical centers in natural rock samples utilizing electron paramagnetic resonance (EPR) spectroscopy and imaging
• Characterization of silica, water, hydrogen-based, and oxygen-based reaction products through multinuclear Nuclear Magnetic Resonance (NMR) in both solution and solid state
• Abiotic redox processes involving iron and other transition metals in fractured rock systems
• Interactions among geomechanical stress, geochemical gradients, and microbial activity in deep subsurface environments
• Formation, accumulation, and migration of natural hydrogen in geological reservoirs and its potential for human energy use
• Implications for early life and habitability on Earth and other planetary bodies

The work will encompass experimental simulations (such as ball milling and high-pressure fracture experiments), magnetic resonance-based characterization, geochemical analysis, and microbial ecology approaches alongside modeling of hydrogen migration and storage potential.

Profile

We seek a highly motivated and organized individual with:

• A strong interest in interdisciplinary research that bridges chemistry, physics, geochemistry, geomechanics, microbiology, and energy science
• A background in chemistry, physics, geochemistry, mineral physics, biogeochemistry, or planetary science
• Experience with experimental techniques, such as:
• High-energy milling or fracture stimulation
• Geochemical assays for H-, H-O-, and redox states (e.g., X-ray Photoelectron Spectroscopy, zeta potential)
• Familiarity with liquid- or solid-state nuclear magnetic resonance (NMR), electron paramagnetic resonance (EPR), or magnetic resonance imaging (MRI)
• Familiarity with analytical tools such as X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray computed tomography (XRCT)
• Experience in designing and conducting high-temperature and high-pressure in-situ experiments is advantageous
• Fluency in English, both written and spoken

Workplace

We provide a dynamic and exciting work environment equipped with cutting-edge computational and laboratory infrastructure at ETH Zurich, specifically within the GEG group. Our group's reactive transport laboratory features an XRCT system for conducting reactive transport experiments, alongside a laser laboratory equipped with Particle Image Velocimetry (PIV) and Laser-Induced Fluorescence (LIF) capabilities. We are also in the process of expanding the laboratory to include both low- and high-field multinuclear Nuclear Magnetic Resonance Imaging (NMR/MRI), electron paramagnetic resonance (EPR), and dynamic nuclear polarization (DNP) instruments to carry out reactive experiments and quantify a wide range of components across multiple spatial dimensions. The GEG Group values an open and inclusive group culture.

We Offer

The position is 100% with a competitive salary according to ETH Zurich standards. The role is initially for one year, with potential annual extensions based on project needs and employee performance. The preferred starting date is March 1, 2026, or as soon thereafter as possible.

We Value Diversity and Sustainability

ETH Zurich is committed to fostering an inclusive culture, promoting equality of opportunity, valuing diversity, and nurturing a working and learning environment in which the rights and dignity of all staff and students are respected. Visit our Equal Opportunities and Diversity website to learn more about how we create a fair and open environment that enables everyone to thrive. Sustainability is a core value for us; we ardently pursue a climate-neutral future.

Curious? So Are We.

We look forward to receiving your online application, including:

• A cover letter that outlines your motivation, experience, and qualifications for the position
• Your CV
• If available, up to three professional reference letters; otherwise, please provide the contact details of up to three references.

Apply online using the form below. Only applications matching the job profile will be considered.

Contact Information

If you have any questions, please reach out to Dr. Adam Altenhof at adam.altenhof@eaps.ethz.ch and/or Dr. Xiang-Zhao Kong at xkong@ethz.ch.

About ETH Zurich

ETH Zurich is one of the world’s leading universities specializing in science and technology. Renowned for cutting-edge research and exceptional education, over 30,000 individuals from more than 120 countries consider our university a place that encourages independent thinking and inspires excellence. Located at the heart of Europe and fostering connections globally, we collaboratively seek solutions for the pressing challenges of our times.