...hundreds if not thousands of primary scientific papers, on the topic over several decades.
I highly recommend the incomparable Vaclav Smil's book on the topic, which despite being decades old pretty much describes reality: Enriching the Earth.
I also have accessed a similar number of papers, and lectures on the topic of CCU (carbon capture and utilization) and have written on the topic here and elsewhere as well. I have no idea how many posts on this topic I've posted here in the last 21 years, but I think it must be a lot.
Some of these references, a tiny subset, actually, appear in the post I linked above and will link again:
A Giant Climate Lie: When they're selling hydrogen, what they're really selling is fossil fuels.
Some of the calculations in that post, based on the data therein are my own.
I note that in many places in the world, hydrogen is not made by the steam reformation of dangerous natural gas, but as it was in Haber's day, by the steam reformation of coal.
Here's a graphic from another post I've written on the topic.

The caption:
Figure 1. Global current sources of H2 production (a), and H2 consumption sectors (b).
Progress on Catalyst Development for the Steam Reforming of Biomass and Waste Plastics Pyrolysis Volatiles: A Review Laura Santamaria, Gartzen Lopez, Enara Fernandez, Maria Cortazar, Aitor Arregi, Martin Olazar, and Javier Bilbao,
Energy & Fuels 2021 35 (21), 17051-17084]
I referred to this graphic, and reproduced it, discussing a paper in the journal I discussed above here:
The current sources and uses of hydrogen.
We have fossil fuel salespeople trying to sell us on the "bait and switch" solar hydrogen/electrolysis in China, but a very recent scientific publication by
Chinese scientists shows this is a dangerous scam for making things worse, not better.
Subsidizing Grid-Based Electrolytic Hydrogen Will Increase Greenhouse Gas Emissions in Coal Dominated Power Systems Liqun Peng, Yang Guo, Shangwei Liu, Gang He, and Denise L. Mauzerall
Environmental Science & Technology 2024 58 (12), 5187-5195
To me, it's very simple, if it's not simple to anyone else: Hydrogen is a filthy fuel promoted by people whose dishonest marketing depends on general public ignorance of the laws of thermodynamics.
Thank you for your comment, but it's not a subject on which I feel I need more education as I understand it very well both on a simple and a highly technical level.
For the record, I regard all sequestration schemes as being obscene beyond compare.