HomeLatest ThreadsGreatest ThreadsForums & GroupsMy SubscriptionsMy Posts
DU Home » Latest Threads » Forums & Groups » Topics » Environment & Energy » Environment & Energy (Group) » Single-catalyst water spl...

Tue Jun 23, 2015, 11:48 AM

Single-catalyst water splitter from Stanford produces clean-burning hydrogen 24/7

https://news.stanford.edu/news/2015/june/water-splitter-catalyst-062315.html
[font face=Serif]Stanford Report, June 23, 2015
[font size=5]Single-catalyst water splitter from Stanford produces clean-burning hydrogen 24/7[/font]

[font size=4]Stanford scientists have developed a cheap and efficient way to extract clean-burning hydrogen fuel from water 24 hours a day, seven days a week.[/font]

By Mark Shwartz

[font size=3]Stanford University scientists have invented a low-cost water splitter that uses a single catalyst to produce both hydrogen and oxygen gas 24 hours a day, seven days a week.

The device, described in a study published June 23 in Nature Communications, could provide a renewable source of clean-burning hydrogen fuel for transportation and industry.

…

"Our water splitter is unique because we only use one catalyst, nickel-iron oxide, for both electrodes," said graduate student Haotian Wang, lead author of the study. "This bi-functional catalyst can split water continuously for more than a week with a steady input of just 1.5 volts of electricity. That's an unprecedented water-splitting efficiency of 82 percent at room temperature."

In conventional water splitters, the hydrogen and oxygen catalysts often require different electrolytes with different pH – one acidic, one alkaline – to remain stable and active. "For practical water splitting, an expensive barrier is needed to separate the two electrolytes, adding to the cost of the device," Wang said. "But our single-catalyst water splitter operates efficiently in one electrolyte with a uniform pH."

…[/font][/font]


3 replies, 812 views

Reply to this thread

Back to top Alert abuse

Always highlight: 10 newest replies | Replies posted after I mark a forum
Replies to this discussion thread
Arrow 3 replies Author Time Post
Reply Single-catalyst water splitter from Stanford produces clean-burning hydrogen 24/7 (Original post)
OKIsItJustMe Jun 2015 OP
TexasProgresive Jun 2015 #1
eppur_se_muova Jun 2015 #2
OKIsItJustMe Jun 2015 #3

Response to OKIsItJustMe (Original post)

Tue Jun 23, 2015, 12:20 PM

1. In reading the article mention is made of a comparison

with conventional rare earth catalysts. It spoke of having to increase the DC voltage but no mention was made of total power input to break the water down. That is voltage times amperage. Voltage alone really means nothing. I want to know how much energy in the form of electricity it takes to break down enough water to drive a hydrogen powered vehicle for say 1 mile. Do that with all other means of producing hydrogen and then we would have something to go on.

Reply to this post

Back to top Alert abuse Link here Permalink


Response to OKIsItJustMe (Original post)

Wed Jun 24, 2015, 09:38 AM

2. "24/7" ?? Spank this journalist !

Totally missed the point that running it for a week is evidence of electrode durability and low maintenance. Like most electrolysis processes, this one runs when power is supplied and stops when it isn't -- "24/7" implies continuous operation, which is just a matter of leaving the switch on, and nothing new at all.

Reply to this post

Back to top Alert abuse Link here Permalink


Response to eppur_se_muova (Reply #2)

Wed Jun 24, 2015, 01:23 PM

3. Yes, my reaction was similar.

Of course, this was at least written by the communications department at Stanford.

I consider press releases to be closer to a primary source than typical “news coverage.” (Like you) I prefer to read the actual papers, but I know most do not.

Reply to this post

Back to top Alert abuse Link here Permalink

Reply to this thread