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This hydrogen evolution system works effectively in a basic aqueous solution (pH\u200511.0) to achieve a hydrogen evolution rate of 10.1\u2005mmol\u2009g<jats:sup>\u22121<\/jats:sup>\u2009h<jats:sup>\u22121<\/jats:sup> for the assembly and a turnover frequency of 5140\u2005h<jats:sup>\u22121<\/jats:sup> with respect to CdSe QDs (10\u2005h); the latter is comparable with the highest value reported for QD systems in an acidic environment. X\u2010ray photoelectron spectroscopy, X\u2010ray absorption spectroscopy, and control experiments demonstrate that Ni(OH)<jats:sub>2<\/jats:sub> is an efficient hydrogen evolution catalyst. In addition, inductively coupled plasma optical emission spectroscopy and the emission decay of the assembly combined with the hydrogen evolution experiments show that TiO<jats:sub>2<\/jats:sub> functions mainly as the electron mediator; the vectorial electron transfer from CdSe QDs to TiO<jats:sub>2<\/jats:sub> and then from TiO<jats:sub>2<\/jats:sub> to Ni(OH)<jats:sub>2<\/jats:sub> enhances the efficiency for hydrogen evolution. The assembly comprises light antenna CdSe QDs, electron mediator TiO<jats:sub>2<\/jats:sub>, and catalytic Ni(OH)<jats:sub>2<\/jats:sub>, which mimics the strategy of photosynthesis exploited in nature and takes us a step further towards artificial photosynthesis.<\/jats:p>","DOI":"10.1002\/cssc.201402885","type":"journal-article","created":{"date-parts":[[2014,12,4]],"date-time":"2014-12-04T06:42:40Z","timestamp":1417675360000},"page":"642-649","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":45,"title":["Vectorial Electron Transfer for Improved Hydrogen Evolution by Mercaptopropionic\u2010Acid\u2010Regulated CdSe Quantum\u2010Dots\u2013TiO<sub>2<\/sub>\u2013Ni(OH)<sub>2<\/sub> 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