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Silicon Nanowires´ Based Photoanode for Efficient Hydrogen Evolution.

SYSNO ASEP	0497723
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Silicon Nanowires´ Based Photoanode for Efficient Hydrogen Evolution.
Author(s)	Dytrych, Pavel (UCHP-M)_{RID, ORCID, SAI} Dřínek, Vladislav (UCHP-M)_{RID, ORCID, SAI} Bumba, Jakub (UCHP-M)_SAI Kaštánek, František (UCHP-M)_{RID, SAI, ORCID} Šolcová, Olga (UCHP-M)_{RID, ORCID, SAI}
Source Title	International Journal of Hydrogen Energy. - : Elsevier - ISSN 0360-3199 Roč. 43, č. 39 (2018), s. 18136-18141
Number of pages	6 s.
Language	eng - English
Country	US - United States
Keywords	hydrogen storage ; hydrogen evolution reaction ; metal nanoparticles
Subject RIV	CI - Industrial Chemistry, Chemical Engineering
OECD category	Chemical process engineering
R&D Projects	GA15-14228S GA ČR - Czech Science Foundation (CSF)
	EF16_027/0007931 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Institutional support	UCHP-M - RVO:67985858
UT WOS	000446949400008
EID SCOPUS	85053545811
DOI	10.1016/j.ijhydene.2018.04.244
Annotation	The solar driven photo-electrolysis of water for hydrogen and nanoparticles formation from electrolyte with corresponding metal salts was investigated. The photoanode consisted of a thin layer of silicon nanowires deposited on molybdenum and a platinum wire as the cathode was used. The prepared photo-anodes were stable up to 0.3 V against the saturated Ag/AgCl electrode without any signs of gaseous oxygen evolution. This photo-electrochemical system enhanced the nanoparticle formation during the illumination phase accompanied with lowering the external potential needed. The present results show that the hydrogen in statu nascendii is formed during the illumination of photoanode, which causes the formation of nanoparticles by reduction of metal salts. During the photo drive electrolysis is the hydrogen stored in/on forming nanoparticles. The size of nanoparticles can be determined by time and an external bias value inserted between the working and platinum electrode in a classical three electrode system. It was confirmed that the formation of nanoparticles was limited by diffusional processes of hydrogen in statu nascendii in electrolyte, which is in agreement with literature.
Workplace	Institute of Chemical Process Fundamentals
Contact	Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227
Year of Publishing	2019

Number of the records: 1