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Highly stable all-in-one photoelectrochemical electrodes based on carbon nanowalls
Lan, Guilian1,2; Nong, Jinpeng1,2; Wei, Wei1; Liu, Xiangzhi2; Luo, Peng1; Jin, Weifeng1; Wei, Dacheng3; Wei, Dapeng2,4
2020-08-14
摘要Photoelectrochemical (PEC) cells offer a promising approach for developing low-cost solar energy conversion systems. However, the lack of stable and cost-effective electrodes remains a bottleneck that hampers their practical applications. Here, we propose a kind of integrated all-in-one three-dimensional (3D) carbon nanowall (CNW) electrode without sensitized semiconductors for stable all-carbon PEC cells. The all-in-one CNW electrodes were fabricated by directly growing CNW on both sides of the SiO2/Si/SiO2 wafer employing the radio frequency plasmon enhanced chemical vapor deposition method. Benefitting from the interconnected 3D textured structure, the CNW can effectively absorb the incident light and provide a large electrochemical reaction interface at the CNW surface that promotes the separation of photogenerated charge carriers, which makes it a superior electrode material. Experimental results show that the all-in-one CNW electrodes possess excellent PEC performance with a photocurrent density of 830 mu A cm(-2). Moreover, the CNW electrodes exhibit excellent photoresponses over a wide waveband and superior stability with a maintained photocurrent response, even after 60 d, which outperforms the electrodes using the other two-dimensional layered materials or semiconductor sensitized electrodes. Such an all-in-one electrode with impressive photovoltaic properties provides a promising platform for PEC applications that is eco-friendly with high efficiency, excellent stability and low cost.
关键词carbon nanowalls all-in-one electrode photoelectrochemical all-carbon stability
DOI10.1088/1361-6528/ab8cf5
发表期刊NANOTECHNOLOGY
ISSN0957-4484
卷号31期号:33页码:13
通讯作者Wei, Wei(wwei@cqu.edu.cn)
收录类别SCI
WOS记录号WOS:000539994900001
语种英语