РОССИЙСКАЯ АКАДЕМИЯ НАУК

УРАЛЬСКОЕ ОТДЕЛЕНИЕ

ИНСТИТУТ ХИМИИ TBEPДОГО ТЕЛА
   
| | | | |
| | | |
 09.12.2008   Карта сайта     Language По-русски По-английски
Новые материалы
Экология
Электротехника и обработка материалов
Медицина
Статистика публикаци


09.12.2008



Sun shines on a solution for hydrogen production



08 December 2008



UK scientists have made hydrogen from water in a simple experiment on a lab bench.


Fraser Armstrong, at the University of Oxford, and colleagues attached an enzyme and a light-harvesting dye to titanium dioxide particles to make a hydrogen-producing system powered by sunlight.


Enzyme bound to titanium dioxide








When light shines on the system, the titanium dioxide-bound enzyme produces hydrogen from water



Hydrogen is a promising future fuel because its production uses two globally abundant resources - water and sunlight, explains Erwin Reisner, from the Armstrong group. Generating hydrogen requires efficient catalysts, which need to be attached to light-trapping particles. 'There is a search for catalysts that do not use rare, expensive metals such as platinum,' says Reisner. 'Enzymes have long been a source of inspiration.'



"There is a search for catalysts that do not use rare, expensive metals such as platinum. Enzymes have long been a source of inspiration"
- Erwin Reisner, University of Oxford, UK

Researchers have found that platinum catalysts can be replaced with hydrogenase enzymes that have nickel and iron in their active sites. But these hydrogenases are inhibited by oxygen and also the hydrogen they produce. Instead, Armstrong's team used a selenium-containing hydrogenase that is more tolerant to oxygen and hydrogen and binds strongly to titanium dioxide. They put the catalytic system in a water and buffer solution, which provided electrons and protons. When they shone light on the system, it produced hydrogen.


Michael Hambourger, who designs bio-inspired devices for solar energy conversion and catalysis in Thomas Moore's lab at Arizona State University, Tempe, US, says the construct is ingenious. 'The stability of this hydrogenase when adsorbed on the titanium dioxide surface is intriguing,' he comments.


Reisner says that although the principle has been proved to work, scaling it up to make it a commercial reality will be a challenge. He wants to incorporate a water oxidation catalyst into the device, which he hopes will allow water splitting, producing both hydrogen and oxygen.


Fay Riordan


Enjoy this story? Spread the word using the 'tools' menu on the left or add a comment to the Chemistry World blog.




Link to journal article



Catalytic electrochemistry of a [NiFeSe]-hydrogenase on TiO2 and demonstration of its suitability for visible-light driven H2 production
Erwin Reisner, Juan C. Fontecilla-Camps and Fraser A. Armstrong, Chem. Commun., 2009
DOI: 10.1039/b817371k


Дизайн и программирование N-Studio 
А Б В Г Д Е Ё Ж З И Й К Л М Н О П Р С Т У Ф Х Ц Ч Ш Щ Ъ Ы Ь Э Ю Я
  • Chen Wev .  honorary member of ISSC science council

  • Harton Vladislav Vadim  honorary member of ISSC science council

  • Lichtenstain Alexandr Iosif  honorary member of ISSC science council

  • Novikov Dimirtii Leonid  honorary member of ISSC science council

  • Yakushev Mikhail Vasilii  honorary member of ISSC science council

  • © 2004-2019 ИХТТ УрО РАН
    беременность, мода, красота, здоровье, диеты, женский журнал, здоровье детей, здоровье ребенка, красота и здоровье, жизнь и здоровье, секреты красоты, воспитание ребенка рождение ребенка,пол ребенка,воспитание ребенка,ребенок дошкольного возраста, дети дошкольного возраста,грудной ребенок,обучение ребенка,родить ребенка,загадки для детей,здоровье ребенка,зачатие ребенка,второй ребенок,определение пола ребенка,будущий ребенок медицина, клиники и больницы, болезни, врач, лечение, доктор, наркология, спид, вич, алкоголизм православные знакомства, православный сайт творчeства, православные рассказы, плохие мысли, православные психологи рождение ребенка,пол ребенка,воспитание ребенка,ребенок дошкольного возраста, дети дошкольного возраста,грудной ребенок,обучение ребенка,родить ребенка,загадки для детей,здоровье ребенка,зачатие ребенка,второй ребенок,определение пола ребенка,будущий ребенок