Internship | Optimization of PEM electrolysis materials

The transition to a sustainable energy system requires large-scale production of green hydrogen. Proton Exchange Membrane (PEM) electrolysis is one of the most promising technologies for converting renewable electricity into hydrogen, offering high efficiency, fast dynamic response and compact system design. However, further improvements in performance, reduced use of critical materials and cost reduction are needed to enable broad application. At TNO, we develop innovative materials and processes that accelerate the implementation of green hydrogen technologies. To support this work, we are looking for an enthusiastic MSc student who wants to contribute to the next generation of materials for PEM electrolysis.

During this internship, you will explore improvements in the materials required for PEM electrolysis. The work focuses on the assembly, characterization and performance evaluation of membrane-electrode assemblies (MEAs), with an emphasis on physical chemistry. You will combine experimental laboratory work with literature research to develop new insights into material preparation and behavior under PEM electrolysis conditions. The internship offers room to independently define experimental approaches and interpret results, making it an excellent opportunity to further develop self-steering research skills.

The internship lasts at least 5 months. A longer period is possible if desired by the candidate or required by the university. Depending on university requirements, the project may be combined with an MSc graduation assignment.

The assignment will mainly take place in Eindhoven; rare visits to the electrolysis test center in Petten may be possible.

• You are a proactive, self-steering MSc student with a background in chemistry, chemical engineering, materials science or a related field.
• You have a strong affinity with physical chemistry.
• You have practical experience with solution chemistry and laboratory experiments.
• You can work independently, take ownership of your research project and organize your work in a structured way.
• You have an analytical mindset and enthusiasm for solving scientific and technical challenges.
• You have good communication skills in English, both written and spoken.
• Experience with and understanding of electrochemistry is a plus.

An internship at TNO means working in an environment where substance and impact are central. You will become part of a knowledge organisation where research and practice come together, and where experts collaborate on solutions to current societal and technological challenges.

Your internship is a period in which you can discover what suits you, where your strengths lie and what you would like to learn next. You are part of a professional working environment, gain insight into how things work in practice, and have the opportunity to build experience that goes beyond this internship alone. For many students, an internship is therefore also a first step in discovering whether TNO could be a potential next step after graduation.

In addition, we offer you:

• A professional and innovative internship environment in which you actively contribute to societal and technological challenges, working alongside leading experts in your field.
• Personal and dedicated supervision, with focus on your learning objectives, development and study assignment.
• Room to develop: you gain relevant work experience, develop both your subject‑specific and professional skills, and build a valuable network.
• Use of a laptop and the facilities you need to perform your work effectively.
• A monthly internship allowance of € 615 for a full-time internship, for MSc, BSc and vocational education (MBO) students.
• Up to eight hours of leave per internship month for a full-time internship, allowing you to balance your internship with your studies and personal life.
• A contribution towards travel expenses if you are not entitled to a student travel card.
• A free membership to Jong TNO: the network for young colleagues, where you can meet other TNO colleagues and participate in sports activities, professional and personal development activities, and social events such as the annual ski trip.

Our people are at the heart of TNO. Their curiosity, expertise and entrepreneurial mindset make it possible to deliver high-impact research and innovations that contribute to society’s sustainable wellbeing and prosperity. That is why we invest in an inspiring and inclusive working environment where colleagues can excel, have autonomy and continue to grow.

Your talent and ambition have every opportunity to flourish at TNO. You work with experts (both within and beyond TNO), have access to advanced technology and the freedom to explore, experiment and innovate. Our strength lies in independence, reliability and collaboration. We find each other in wonder and ingenuity. We are driven to push boundaries. By working with businesses and government, and by connecting different perspectives, we strengthen our innovative capability and create responsible, meaningful results.

At TNO, we believe this is our time to help society, government and business move forward faster. Together with driven colleagues, you turn knowledge into concrete innovations or ventures that truly make a difference by combining the power of science and entrepreneurship. And in doing so, you make your mark on our time.

You can apply for this internship position until the 31st of August, 2026. After submitting your application, you will receive a confirmation by email.

TNO will arrange an appropriate internship agreement. If you have any questions about the content of the internship or the application procedure, you can contact the person listed below.

If you start an internship with us, we will also ask you to provide a Certificate of Conduct (VOG).

Important to know before applying:

• Before the start of the internship, an internship agreement must be signed. For students enrolled at a Dutch university or university of applied sciences, TNO uses the UNL-template, supplemented with several TNO‑specific agreements. For students from foreign educational institutions and MBO (secondary vocational education) programmes, the TNO internship agreement applies. TNO does not sign any other internship agreements.
• Before the start of the internship, the educational institution will need to confirm in writing that:
  1. you are enrolled at the educational institution for the duration of the internship, and;
  2. the internship forms part of your study programme.

The confirmation of educational institution takes place by signing the UNL template or forms prepared by TNO.

• Interns at TNO must have a registered residential address in the Netherlands at the start of the internship. Carrying out internship activities from abroad is not possible.
• Are you an international student? Please note that you must have a BSN (Dutch citizen service number) before the start of your internship. Applying for a BSN can take several weeks, so make sure to start this process well in advance.