Talk:Biohydrogen

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 * Added archive https://web.archive.org/web/20100704214819/http://www.microbemagazine.org/index.php?option=com_content&view=article&id=309:photobiological-hydrogen-productionprospects-and-challenges&catid=132:featured&Itemid=196 to http://www.microbemagazine.org/index.php?option=com_content&view=article&id=309:photobiological-hydrogen-productionprospects-and-challenges&catid=132:featured&Itemid=196

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I believe this entire article needs review. It's at least out of date, and may possibly contain incorrect or even fraudulent information. I've been unable to substantiate some significant claims and data presented. Many of the citations within the article don't go to where they say they go, and don't appear to support the claims for which they are cited. As one quick example, there a statement that 96% of hydrogen currently produced is derived from fossil fuels, and 4% by electrolysis. That's consistent with what I recall reading elsewhere and is probably correct. However, the breakdown given for hydrogen produced from fossil fuels surprised me: 48% from natural gas, 30% from hydrocarbons, 18% from coal. AFAIK, there is no significant production of hydrogen from anything other than natural gas and coal -- which are themselves hydrocarbons. No immediate citation is given for that breakdown, but the first citation given at the end of the paragraph is supposed to be to an SRI Consulting report on hydrogen. However the link redirects to a page at IHS.com selling reports on the chemicals industry generally. This is likely the innocent result of a common plague of web references becoming stale. IHS Markit may have purchased rights to the SRI report, and installed an automatic redirect. However, several other links that I checked also led to destinations other than where they purported to go, and did not substantiate the claims for which they were cited. In some of these cases, it's because the citations were to popular magazine articles, but were not permalinks to the content that was displayed when the link was captured. Again, an innocent error, but one that undercuts the author's credibility.

Doesn't Wikipedia have a bot for checking citations and flagging both dead links and those whose destination has changed from when it was last validated? 50.174.63.60 (talk) 19:29, 7 May 2017 (UTC)

This article needs help
It is not possible, from this jumble of claims and details, to figure out what biohydrogen is, how it comes about (two damn enzymes), and the underlying energetics. If you are vested in this topic or have strong views, please leave a note. Otherwise I plan to remove most of the content. Suggested organization: Looking forward to being educated or corrected. --Smokefoot (talk) 03:21, 4 June 2017 (UTC)
 * illustrative reactions (fermentation). Sugars to carboxylic acids. one equation, one DeltaG.
 * Mention some exotic stuff like photohydrogen production by the algal species. C.rheinhardtei. briefly.
 * Mention that these reactions are all catalyzed by 2 hydrogenases mediated by 4Fe clusters.
 * list some of the organisms that rely on this pathway.
 * not indicate that this technology is particularly promising.

I expanded this article in roughly 2008 and at that time it was 100% factual and all the links were real. The article was then expanded further by I don't know who and Smokefoot is right that the article did need help. However, it is now much less accurate than it was. It is misleading by omission. It is remis to only mention algae; Fermentative, photoautotrophic and photofermentative microbes (including algea and bacteria, photosynthetyic and non-photosynthetic) are just as important on this topic. It is remis to only mention hydrogenases; nitrogenases are just as important. Unfortunately, it is not possible (period) to say simply what biohydrogen is because there is no concensus definition among the experts in the field. Some would say that hydrogen made by reforming of biomass is biohydrogen. The polar view is that it is hydrogen made by enzymes in living microbes. Suggested easy improvements: mention the diversity of biological routes to biohydrogen and remove (algae). add link to photofermentation wikipage Reinstate all the links to peer reviewed academic journal articles, especially those that are open access/author's copy freely supplied. — Preceding unsigned comment added by 213.106.180.50 (talk) 08:34, 6 March 2018 (UTC)