Investigation of porous silicon photocathodes for photoelectrochemical hydrogen production

被引：10

作者：

Chandrasekaran, Soundarrajan ^{[1
]}

Vijayakumar, Sanahan ^{[1
]}

Nann, Thomas ^{[2
]}

Voelcker, Nicolas H. ^{[1
]}

机构：

[1] Univ South Australia, Future Ind Inst, Adelaide, SA, Australia

[2] Victoria Univ Wellington, MacDiarmid Inst Adv Mat & Nanotechnol, Wellington 6140, New Zealand

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2016年 / 41卷 / 44期

关键词：

Porous silicon; Nanostructure; Anti-reflective surface; Hydrogen production; DIATOM FRUSTULES; VISIBLE-LIGHT; WATER;

D O I：

10.1016/j.ijhydene.2016.09.048

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Solar energy conversion is made possible through the use of silicon as a photoelectrode material. Nanostructuring of the silicon substrate further improves solar energy conversion by virtue of its antireflective surface and tuneable band gap energies. In this work, we investigated the optimal etching conditions to fabricate porous silicon films, in terms of pore size and layer thickness. The stability of the sample was improved by passivating the porous layer with methyl groups via the electrografting of methyl iodide. A bio-inspired iron sulphur carbonyl electrocatalyst loaded on the electrografted porous silicon was studied. A photocurrent density of -2.8 mA/cm(2) and 46.8 mu mol/h of hydrogen gas were observed for the electrografted porous silicon coated with bio-inspired iron sulphur carbonyl electrocatalyst. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：19915 / 19920

页数：6

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