Dear Researchers what is the highest benchmarks which are achieved from the PEC water splitting? I mean the highest photocurrent density, solar to hydrogen efficiency etc.
Though your question is very general, we can get some information from this article.
The efficiency of water splitting to produce H2 gas using solar power is very low about 2 to 3%. The benchmark that you could use is the artificial leaf invented by my colleague Dan Nocera at Harvard University. He is in the chemistry department at Harvard. Here is the URL to read more about the artificial leaf for water splitting.
http://news.harvard.edu/gazette/story/2016/06/bionic-leaf-turns-sunlight-into-liquid-fuel/
Hope this helps answer your question.
Professor Yehia Khalil, Yale University, USA
Fellow of the University of Oxford, UK
Thanks, Dr. Sujoy Sarkar, I need to know the exact benchmarks which are achieved, Various reviews report different things, So it is difficult to realize.
Anyway thanks again
Not just hydrogen can be produced from water-splitting. It seems interesting to note that the 'Sabatier' reaction (i): CO2 + 4 H2 → CH4 + 2 H2O, which captures CO2, can be coupled with the water-splitting reaction (ii): 4 H2O → 4 H2 + 2 O2. The net result of combining both reactions is (iii): CO2 + 2 H2O → CH4 + 2 O2. Even considering that sunlight-based photolysis still needs much development; large arrays of photovoltaic solar cells can be now considered economically amenable, what combined with electrolysis, can render electrochemical water-splitting reasonably viable in terms of current technology.
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