國立虎尾科技大學 |

Nanostructured Cu-Zn Electrode Materials for Green Hydrogen Production

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Nanostructured Cu-Zn Electrode Materials for Green Hydrogen Production/ Rahma Leil.
作者:	Leil, Rahma,
面頁冊數:	1 electronic resource (101 pages)
附註:	Source: Masters Abstracts International, Volume: 85-12.
Contained By:	Masters Abstracts International85-12.
標題:	Optics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31151358
ISBN:	9798383021668

Nanostructured Cu-Zn Electrode Materials for Green Hydrogen Production
Leil, Rahma,

Nanostructured Cu-Zn Electrode Materials for Green Hydrogen Production [electronic resource] /Rahma Leil. - 1 electronic resource (101 pages)

Source: Masters Abstracts International, Volume: 85-12.

The continuity of human civilization heavily depends on securing sources of energy. After the 1970s energy crisis, scientists and engineers are meticulously looking for fuels that are alternatives to fossil fuels. Hydrogen can store solar energy to be further used as a fuel. One of the renewable ways to produce hydrogen is Photoelectrochemical (PEC) water splitting. PEC water splitting is a promising way to produce green hydrogen. However, one of the bottlenecks in realizing scalable green hydrogen production systems is the inability to identify and fabricate earthabundant, stable, and durable photocathodes. The main challenges with the reported photocathodes so far are their instability in aqueous solutions and the use of precious unabundant materials. To this end, the use of scrap materials to fabricate highly stable photocathodes would solve the two main challenges. Herein, scrap brass alloys with different zinc contents were used to fabricate photocathodes for photoelectrochemical green hydrogen production. The scrap brass alloy with 5% Zn showed enhancement in the photocurrent density of -0.26 mA/cm2 at 0.62 V vs reversible hydrogen electrode (RHE) , high long-term stability up to four hours under continuous illumination, high charge carrier density of 6.2×1021 cm-3and less total resistance than the other brass samples. Through electrochemical impedance spectroscopy (EIS), the presence of surface states was verified. The 95Cu-5Zn sample showed an amount of evolved hydrogen of 0.2658 μmole after one hour of continuous illumination, while the 100Cu sample only showed 3.965 nmole after 20 minutes of continuous illumination before being completely reduced to copper. Density functional theory calculations were used to study the optical and electronic properties of the best-performing sample. This work is the first to systematically and fundamentally study scrap brass as a promising material for a more stable and durable PEC water splitting.

English

ISBN: 9798383021668Subjects--Topical Terms:

595336
Optics.

Nanostructured Cu-Zn Electrode Materials for Green Hydrogen Production
LDR:03327nam a22003973i 4500 001 1172882
005 20260622113220.5
006 m o d
007 cr|nu||||||||
008 260803s2024 miu||||||m |||||||eng d
020 $a 9798383021668
035 $a (MiAaPQD)AAI31151358
035 $a (MiAaPQD)AmericanUnivCairoetds3276
035 $a AAI31151358
040 $a MiAaPQD $b eng $c MiAaPQD $e rda
100 1 $a Leil, Rahma, $e author. $3 1503506
245 1 0 $a Nanostructured Cu-Zn Electrode Materials for Green Hydrogen Production $c Rahma Leil. $h [electronic resource] /
264 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2024
300 $a 1 electronic resource (101 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Masters Abstracts International, Volume: 85-12.
500 $a Advisors: Allam, Nageh Committee members: Orabi, Mohamed.
502 $b M.S. $c The American University in Cairo (Egypt) $d 2024.
520 # $a The continuity of human civilization heavily depends on securing sources of energy. After the 1970s energy crisis, scientists and engineers are meticulously looking for fuels that are alternatives to fossil fuels. Hydrogen can store solar energy to be further used as a fuel. One of the renewable ways to produce hydrogen is Photoelectrochemical (PEC) water splitting. PEC water splitting is a promising way to produce green hydrogen. However, one of the bottlenecks in realizing scalable green hydrogen production systems is the inability to identify and fabricate earthabundant, stable, and durable photocathodes. The main challenges with the reported photocathodes so far are their instability in aqueous solutions and the use of precious unabundant materials. To this end, the use of scrap materials to fabricate highly stable photocathodes would solve the two main challenges. Herein, scrap brass alloys with different zinc contents were used to fabricate photocathodes for photoelectrochemical green hydrogen production. The scrap brass alloy with 5% Zn showed enhancement in the photocurrent density of -0.26 mA/cm2 at 0.62 V vs reversible hydrogen electrode (RHE) , high long-term stability up to four hours under continuous illumination, high charge carrier density of 6.2×1021 cm-3and less total resistance than the other brass samples. Through electrochemical impedance spectroscopy (EIS), the presence of surface states was verified. The 95Cu-5Zn sample showed an amount of evolved hydrogen of 0.2658 μmole after one hour of continuous illumination, while the 100Cu sample only showed 3.965 nmole after 20 minutes of continuous illumination before being completely reduced to copper. Density functional theory calculations were used to study the optical and electronic properties of the best-performing sample. This work is the first to systematically and fundamentally study scrap brass as a promising material for a more stable and durable PEC water splitting.
546 $a English
590 $a School code: 1836
650 # 4 $a Optics. $3 595336
650 # 4 $a Atomic physics. $3 1182532
650 # 4 $a Analytical chemistry. $3 1182118
650 # 4 $a Alternative energy. $3 1241221
650 # 4 $a Semiconductors. $3 578843
650 # 4 $a Alternative energy sources. $3 1372705
650 # 4 $a Spectrum analysis. $3 582358
650 # 4 $a Electrons. $3 580456
690 $a 0363
690 $a 0486
690 $a 0748
690 $a 0752
710 2 # $a The American University in Cairo (Egypt). $3 1464614
720 1 $a Allam, Nageh $e degree supervisor.
773 0 # $t Masters Abstracts International $g 85-12.
790 $a 1836
791 $a M.S.
792 $a 2024
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31151358