A team of researchers led by Zhifeng Ren, director of the Texas Center for Superconductivity at UH, has reported an oxygen evolving catalyst that takes just minutes to grow at room temperature and is capable of efficiently producing both clean drinking water and hydrogen from seawater.
Fast, One-Step Assembly at Room Temperature Yields High Efficiency at Low Cost
Seawater makes up about 96% of all water on earth, making it a tempting resource to meet the world’s growing need for clean drinking water and carbon-free energy. And scientists already have the technical ability to both desalinate seawater and split it to produce hydrogen, which is in demand as a source of clean energy.
But existing methods require multiple steps performed at high temperatures over a lengthy period of time in order to produce a catalyst with the needed efficiency. That requires substantial amounts of energy and drives up the cost.
Researchers from the University of Houston have reported an oxygen evolving catalyst that takes just minutes to grow at room temperature on commercially available nickel foam. Paired with a previously reported hydrogen evolution reaction catalyst, it can achieve industrially required current density for overall seawater splitting at low voltage. The work is described in a paper published in Energy & Environmental Science.
Zhifeng Ren, director of the Texas Center for Superconductivity at UH (TcSUH) and corresponding author for the paper, said speedy, low-cost production is critical to commercialization.
“Any discovery, any technology development, no matter how good it is, the end cost is going to play the most important role,” he said. “If the cost is prohibitive, it will not make it to market. In this paper, we found a way to reduce the cost so commercialization will be easier and more acceptable to customers.”
Ren’s research group and others have previously reported a nickel-iron-(oxy)hydroxide compound as a catalyst to split seawater, but producing the material required a lengthy process conducted at temperatures between 300 Celsius and 600 Celsius, or as high as 1,100 degrees Fahrenheit. The high energy cost made it impractical for commercial use, and the high temperatures degraded the structural and mechanical integrity of the nickel foam, making long-term stability a concern, said Ren, who also is M.D. Anderson Professor of physics at UH.
To address both cost and stability, the researchers discovered a process to use nickel-iron-(oxy)hydroxide on nickel foam, doped with a small amount of sulfur to produce an effective catalyst at room temperature within five minutes. Working at room temperature both reduced the cost and improved mechanical stability, they said.
“To boost the hydrogen economy, it is imperative to develop cost-effective and facile methodologies to synthesize NiFe-based (oxy)hydroxide catalysts for high-performance seawater electrolysis,” they wrote. “In this work, we developed a one-step surface engineering approach to fabricate highly porous self-supported S-doped Ni/Fe (oxy)hydroxide catalysts from commercial Ni foam in 1 to 5 minutes at room temperature.”
In addition to Ren, co-authors include first author Luo Yu and Libo Wu, Brian McElhenny, Shaowei Song, Dan Luo, Fanghao Zhang and Shuo Chen, all with the UH Department of Physics and TcSUH; and Ying Yu from the College of Physical Science and Technology at Central China Normal University.
Ren said one key to the researchers’ approach was the decision to use a chemical reaction to produce the desired material, rather than the energy-consuming traditional focus on a physical transformation.
“That led us to the right structure, the right composition for the oxygen evolving catalyst,” he said.
The Latest Updates from Bing News & Google News
Go deeper with Bing News on:
Hydrogen production
- Toyota and a Company Called Fuel Cell Energy Make Case for Hydrogen
Toyota and Fuel Cell Energy have partnered to create a mini refinery to produce hydrogen for Class 8 fuel-cell trucks and electricity to run its port operations. The facility even produces clean water ...
- Fortescue launches work on its first U.S. green-hydrogen plant
Fortescue (East Perth, Australia) marked a new phase in the development of the company’s $550 million venture into green hydrogen production in the United ...
- Nikola (NKLA) Q1 2024 by the numbers: Production and revenue down amid a keen focus on hydrogen
During its Q1 2023 financial report, the American commercial vehicle manufacturer hinted at a weaning down of staff and company spending to optimize hydrogen and BEV truck production. By Q2 2023, ...
- Genocide victims’ remains found on Namibia's Shark Island, adding to calls to scrap German green hydrogen port project
Namibian authorities are being urged to freeze plans to extend a port on the Shark Island peninsula – meant to support green hydrogen production along the country’s south coast – after the discovery ...
- Metacon AB: Metacon and Siemens enter into collaboration for the manufacture of systems for green hydrogen production
Metacon AB (publ) and Siemens AB have signed a Memorandum of Understanding to enter into a partnership with the aim of accelerating the manufacturing of ...
Go deeper with Google Headlines on:
Hydrogen production
[google_news title=”” keyword=”Hydrogen production” num_posts=”5″ blurb_length=”0″ show_thumb=”left”]
Go deeper with Bing News on:
Hydrogen production from seawater
- Sailing around the world with zero emissions
Essentially a floating research laboratory, the vessel has been sailing around the world over the last seven years using hydrogen fuel cells, wind propulsion, solar panels, batteries and hydropower to ...
- Green hydrogen produced from waste water
Alpha phase outputs show that the membraneless electrolyser prototypes achieved at least 94 per cent purity hydrogen from direct electrolysis of nine different impure water sources, with 94.9 per cent ...
- Can this ocean-based carbon plant help save the world? Some scientists are raising red flags
In Singapore, a new plant will turn CO2 from seawater and air into the same material as seashells, in a process that will also produce “green” hydrogen ...
- Can this ocean-based carbon plant help save the world? Some scientists are raising red flags
The seawater will also be sent back into the ... The company also said the production of hydrogen, which could be used to power the process, means its overall energy use is lower than other ...
Go deeper with Google Headlines on:
Hydrogen production from seawater
[google_news title=”” keyword=”Hydrogen production from seawater” num_posts=”5″ blurb_length=”0″ show_thumb=”left”]