Natural hydrogen hype can shape funding rules and research agendas
A study finds that unverified expectations can become embedded in legal categories, funding calls and research plans.
Editorial illustration — not from the study.
Researchers examined 268 documents about natural hydrogen, published from 1987 to mid-2025, using an expert-calibrated artificial intelligence system to assess eight forms of promotional language. They also analyzed the references in those documents and identified patterns associated with stronger promotional language, including a lack of direct measurements, comparisons with hydrocarbon systems and publication in lower-prestige journals.
The team then examined 22 institutional documents from 2021 to 2026. Documents that put expectations into action tended to amplify them, while documents that selected or evaluated options tended to moderate them. A third group, described as hybrids, incorporated expectations into legal categories, funding calls and research agendas, where they could influence procedures rather than only persuade readers.
What the documents show
Across the 268 natural-hydrogen documents, hype was defined as a gap between the strength of the evidence and the language used, rather than simply as discussion of the future. The study placed hype in the top two of five levels of promotional language, while the documents as a whole covered all five levels.
The strongest correlate of promotional language was low out-closeness centrality, a network measure indicating that the references were relatively peripheral to the wider research field. A high hub score indicated reliance on widely cited authorities. Other associated features included high novelty, no direct measurements, analogies with hydrocarbon systems, publication in lower-prestige journals and a focus on technical-economic or environmental questions. Together, these factors explained about one-third of the variation in the register of the documents. The register also rose as newcomers entered peripheral positions.
In the 22 institutional documents, the register varied with the document's role. Enacting documents amplified expectations, selecting documents moderated them, and hybrid documents used a moderate register while incorporating expectations into categories, funding calls and research agendas. Amplifying texts recurred and pushed caveats toward the margins, whereas tempering texts appeared only once in the set examined.
Why the language matters
The findings suggest that expectations about natural hydrogen may influence more than public or scientific language. When those expectations are written into legal categories, funding programs and research priorities, they can shape what institutions support and how decisions are made, even when the underlying claims remain unverified.
The study also links this pattern to procedural energy justice: the balance of information available before public participation begins. If promotional documents recur while cautionary documents are less visible, later participation may start with an uneven set of assumptions.
Evidence and caveats
This is a document and network analysis, not a test of whether natural hydrogen projects work or whether promotional language directly causes funding or legal decisions. The first part covers 268 documents and uses an expert-calibrated artificial intelligence system to score language across eight dimensions, alongside analyses of the documents' references. The second part is a discourse analysis of 22 institutional documents from 2021 to 2026.
The reported relationships are associations within the analyzed documents. The abstract does not specify how the documents were selected, how the artificial intelligence scores were validated beyond expert calibration, or whether the patterns generalize to natural-hydrogen institutions and policies outside this collection.
// Source
Energy Research & Social Science · 2026 · DOI: 10.1016/j.erss.2026.104997
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