Science Current Events | Science News | Brightsurf.com
 

Secrets of the first practical artificial leaf

May 10, 2012
A detailed description of development of the first practical artificial leaf - a milestone in the drive for sustainable energy that mimics the process, photosynthesis, that green plants use to convert water and sunlight into energy - appears in the ACS journal Accounts of Chemical Research. The article notes that unlike earlier devices, which used costly ingredients, the new device is made from inexpensive materials and employs low-cost engineering and manufacturing processes.

Daniel G. Nocera points out that the artificial leaf responds to the vision of a famous Italian chemist who, in 1912, predicted that scientists one day would uncover the "guarded secret of plants." The most important of those, Nocera says, is the process that splits water into hydrogen and oxygen. The artificial leaf has a sunlight collector sandwiched between two films that generate oxygen and hydrogen gas. When dropped into a jar of water in the sunlight, it bubbles away, releasing hydrogen that can be used in fuel cells to make electricity. These self-contained units are attractive for making fuel for electricity in remote places and the developing world, but designs demonstrated thus far rely on metals like platinum and manufacturing processes that make them cost-prohibitive.

To make these devices more widely available, Nocera replaced the platinum catalyst that produces hydrogen gas with a less-expensive nickel-molybdenum-zinc compound. On the other side of the leaf, a cobalt film generates oxygen gas. Nocera notes that all of these materials are abundant on Earth, unlike the rare and expensive platinum, noble metal oxides and semiconducting materials others have used. "Considering that it is the 6 billion nonlegacy users that are driving the enormous increase in energy demand by midcentury, a research target of delivering solar energy to the poor with discoveries such as the artificial leaf provides global society its most direct path to a sustainable energy future," he says.

###

The author acknowledges support from the National Science Foundation and the Chesonis Family Foundation.

The American Chemical Society is a nonprofit organization chartered by the U.S. Congress. With more than 164,000 members, ACS is the world's largest scientific society and a global leader in providing access to chemistry-related research through its multiple databases, peer-reviewed journals and scientific conferences. Its main offices are in Washington, D.C., and Columbus, Ohio.

American Chemical Society


Related Artificial Leaf Current Events and Artificial Leaf News Articles


Toward a low-cost 'artificial leaf' that produces clean hydrogen fuel
For years, scientists have been pursuing "artificial leaf" technology, a green approach to making hydrogen fuel that copies plants' ability to convert sunlight into a form of energy they can use.

Unique catalysts for hydrogen fuel cells synthesized in ordinary kitchen microwave oven
Swedish and Chinese researchers show how a unique nano-alloy composed of palladium nano-islands embedded in tungsten nanoparticles creates a new type of catalysts for highly efficient oxygen reduction, the most important reaction in hydrogen fuel cells.

Molecular snapshots of oxygen formation in photosynthesis
Researchers from Umeå University have explored two different ways that allow unprecedented experimental insights into the reaction sequence leading to the formation of oxygen molecules in photosynthesis. The two studies have been published in the scientific journal Nature Communications.

Pioneering findings on the dual role of carbon dioxide in photosynthesis
Researchers at Umeå University have found that carbon dioxide, in its ionic form bicarbonate, has a regulating function in the splitting of water in photosynthesis.

Artificial leaf jumps developmental hurdle
In a recent early online edition of Nature Chemistry, ASU scientists, along with colleagues at Argonne National Laboratory, have reported advances toward perfecting a functional artificial leaf.

Graphene nanoscrolls are formed by decoration of magnetic nanoparticles
Researchers at Umeå University, together with researchers at Uppsala University and Stockholm University, show in a new study how nitrogen doped graphene can be rolled into perfect Archimedean nano scrolls by adhering magnetic iron oxide nanoparticles on the surface of the graphene sheets.

Artificial Forest for Solar Water-Splitting
In the wake of the sobering news that atmospheric carbon dioxide is now at its highest level in at least three million years, an important advance in the race to develop carbon-neutral renewable energy sources has been achieved.

MIT researchers develop solar-to-fuel roadmap for crystalline silicon
New analysis points the way to optimizing efficiency of an integrated system for harvesting sunlight to make storable fuel.

Artificial leaf could debut new era of 'fast-food energy'
Technology for making an "artificial leaf" holds the potential for opening an era of "fast-food energy," in which people generate their own electricity at home with low-cost equipment perfect for the 3 billion people living in developing countries and even home-owners in the United States.

Debut of the first practical 'artificial leaf'
Scientists today claimed one of the milestones in the drive for sustainable energy - development of the first practical artificial leaf.
More Artificial Leaf Current Events and Artificial Leaf News Articles

Crochet Garden: Bunches of Flowers, Leaves, and Other Delights

Crochet Garden: Bunches of Flowers, Leaves, and Other Delights
by Suzann Thompson (Author)


Building on the success of her first book, Crochet Bouquet, Suzann Thompson presents a delightful collection of garden-inspired creations. After briefly reviewing the basics, Suzann arranges her designs in four distinct sections: Botanical Gardens, featuring well-known varieties; Inspired Gardens, based on decorative motifs; International Gardens, incorporating flowers from throughout the world; and Fun and Fantastic Gardens, with imaginative takes on traditional favorites. Simple and fun, they all use widely available yarns. Inspirational projects show how to use the motifs to decorate garments, accessories, and home décor items.

Artificial Gravity (Space Technology Library)

Artificial Gravity (Space Technology Library)
by Gilles Clément (Editor), Angeli Bukley (Editor)


This book reviews the principle and rationale for using artificial gravity during space missions, and describes the current options proposed, including a short-radius centrifuge contained within a spacecraft. Experts provide recommendations on the research needed to assess whether or not short-radius centrifuge workouts can help limit deconditioning of physiological systems. Many detailed illustrations are included.

Artificial Intelligence Programming

Artificial Intelligence Programming
by Eugene Charniak (Author), etc. (Author)


Artificial intelligence research has thrived in the years since this best-selling AI classic was first published. The revision encompasses these advances by adapting its coding to Common Lisp, the well-documented language standard, and by bringing together even more useful programming tools. Today's programmers in AI will find this volume's superior coverage of programming techniques and easily applicable style anything but common.


The Contemporary Buttercream Bible: The Complete Practical Guide to Cake Decorating with Buttercream Icing

The Contemporary Buttercream Bible: The Complete Practical Guide to Cake Decorating with Buttercream Icing
by Valeri Valeriano (Author), Christina Ong (Author)


Buttercream icing is the most delicious cake decorating medium, is very accessible and needs very little specialist equipment.This essential guide demonstrates more than 50 innovative techniques via easy to follow step-by-step photographic tutorials and includes over 40 stunning cake designs to create at home, from simple cupcakes to three-tiered wonders.Valeri & Christina start by showing you how to perfect a basic buttercream recipe and then how to pipe simple textures and patterns, and an array of flowers. They then demonstrate how to create a myriad of creative effects using diverse techniques such as stamping, stencilling, palette knife painting and much more.Chef Duff Goldman from Ace of Cakes has reviewed the book: "The Contemporary Buttercream Bible is an absolute game changer in...

Process of Question Answering: A Computer Simulation of Cognition

Process of Question Answering: A Computer Simulation of Cognition
by Wendy G. Lehnert (Author)




Tea-Cup Reading and Fortune-Telling by Tea Leaves: With Ten Illustrations

Tea-Cup Reading and Fortune-Telling by Tea Leaves: With Ten Illustrations
by A Highland Seer (Author)


Tea-Cup Reading and Fortune-Telling by Tea Leaves. By A Highland Seer. It is somewhat curious that among the great number of books on occult science and all forms of divination which have been published in the English language there should be none dealing exclusively with the Tea-cup Reading and the Art of Telling Fortunes by the Tea-leaves: notwithstanding that it is one of the most common forms of divination practised by the peasants of Scotland and by village fortune-tellers in all parts of this country. In many of the cheaper handbooks to Fortune-telling by Cards or in other ways only brief references to the Tea-cup method are given; but only too evidently by writers who are merely acquainted with it by hearsay and have not made a study of it for themselves. This is probably because...

Dictionary Oraganometallic E2 Sup 1

Dictionary Oraganometallic E2 Sup 1
by Richard Mahaffey (Author)


Effective laboratory data management is essential for controlling costs and maximizing profits. This book shows how to plan, implement and manage optimum computer systems for individual laboratories. It covers components of automation, as well as the relationship between automation and laboratory information management systems (LIMS). Each LIMS function and feature is discussed separately, and all steps of LIMS training, set up and customization are presented. Also explained are laboratory communications, laboratory computing, justification for LIMS and validation of computer systems. This book should be of interest to chemists and laboratory computer analysts.

Mathematical Control Theory: Deterministic Finite Dimensional Systems (Texts in Applied Mathematics) (v. 6)

Mathematical Control Theory: Deterministic Finite Dimensional Systems (Texts in Applied Mathematics) (v. 6)
by Eduardo D. Sontag (Author)


Geared primarily to an audience consisting of mathematically advanced undergraduate or beginning graduate students, this text may additionally be used by engineering students interested in a rigorous, proof-oriented systems course that goes beyond the classical frequency-domain material and more applied courses. The minimal mathematical background required is a working knowledge of linear algebra and differential equations. The book covers what constitutes the common core of control theory and is unique in its emphasis on foundational aspects. While covering a wide range of topics written in a standard theorem/proof style, it also develops the necessary techniques from scratch. In this second edition, new chapters and sections have been added, dealing with time optimal control of linear...

National Geographic Kids Weird but True!: Ripped from the Headlines: Real-life Stories You Have to Read to Believe

National Geographic Kids Weird but True!: Ripped from the Headlines: Real-life Stories You Have to Read to Believe
by National Geographic Kids (Author)


This just in! The most bizarre and surprising news stories you've ever read, and they're all true!

Glow-in-the-dark piglets, soccer-playing parrots, cicada-flavored ice cream, fashion-forward slugs!
Get ready to be amazed by weird and wacky headlines from across the globe! Weird But True! Ripped From the Headlines has all the things you’d expect from a regular news publication—world news, sports and science sections, entertainment stories, and more—but with a brand-new twist: These stories are almost too strange to believe! Ripped From the Headlines covers mind-bending trivia about animals, athletes, space, food, toys, geography, money, weather, and more. Get ready to open your eyes to the wild wonders of the world. You’ll never look at the news the same...

Fly-Tying

Fly-Tying
by Helen Shaw (Author)


No book has taught more serious fly tyers the basic skills of fly tying.


© 2014 BrightSurf.com