CdCS3 with the flat-band as an environmentally friendly photocatalyst for enhancing visible light absorbance and stabilizing photocatalytic hydrogen generation

CdCS3 with the flat-band as an environmentally friendly photocatalyst for enhancing visible light absorbance and stabilizing photocatalytic hydrogen generation | Authorea try { document.documentElement.classList.add('js'); } catch (e) { } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'G-8VDV14Y67G']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); Skip to main content Preprints Collections Wiley Open Research IET Open Research Ecological Society of Japan All Collections About About Authorea FAQs Contact Us Quick Search anywhere Search for preprint articles, keywords, etc. Search Search ADVANCED SEARCH SCROLL Energy & Environmental Materials This is a preprint and has not been peer reviewed. Data may be preliminary. 12 May 2026 V1 Latest version Share on CdCS3 with the flat-band as an environmentally friendly photocatalyst for enhancing visible light absorbance and stabilizing photocatalytic hydrogen generation Authors : Bo Yan [email protected] , Xingyuan Chen [email protected] , Haoran Shi [email protected] , Yawen Li [email protected] , Ziping Zheng [email protected] , Pu Liu [email protected] , Huakai Xu [email protected] , Yan He [email protected] , and Guowei Yang 0000-0003-2141-6630 [email protected] Authors Info & Affiliations https://doi.org/10.22541/authorea.15003086/v1 14 views 6 downloads Contents Abstract Supplementary Material Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract The flat-band refers to a topological electronic structure where the energy bands exhibit flatness and minimal dispersion in the Brillouin zone, resulting in a high density of states that localizes charge carriers over a smaller spatial range. This high density of states enables a different photocatalytic mechanism compared to traditional photocatalysis. Here, we demonstrated that the flat-band in CdCS3 not only increases the density of states available for the electronic transitions during the light excitation, but also broadens the light absorption range, thereby greatly promoting the visible light absorption. The flat-band region also serves as a “charge supply reservoir” for the photogenerated carriers. It was found that the CdCS3 achieves a hydrogen production rate of 25.5 mmol·h⁻¹·g⁻¹ under the visible light, and maintains nearly the constant performance after an initial stabilization period of 5 hours in a 40-hour cycles. The comparative experiment between CdCS3 and CdS showed that CdS exhibited complete loss of hydrogen evolution after cyclic testing. These findings highlight the superior stability of the CdCS3 photocatalyst, confirming the beneficial influence of the charge supply reservoir from the flat-band, and emphasizing its potential for optimizing photocatalytic materials and enhancing hydrogen evolution performance. Supplementary Material File (supporting information.docx) supporting information Download 4.19 MB Information & Authors Information Version history V1 Version 1 12 May 2026 Collection Energy & Environmental Materials Keywords carbon materials catalysts CO2 utilization solar cells carbon materials nanotechnology photovoltaics materials science Covalent Organic Frameworks catalysts Photocatalysis charge transfer heterostructures Topological electronic structure flat-band photocatalytic materials carbon materials batteries supercapacitors energy materials electrodes energy materials semiconductors solar cells light emitting materials materials science carbon materials catalysts CO2 utilization Covalent Organic Frameworks catalysts Photocatalysis charge transfer heterostructures solar cells carbon materials nanotechnology photovoltaics materials science Authors Affiliations Bo Yan [email protected] Sun Yat-Sen University, Guangzhou, China View all articles by this author Xingyuan Chen [email protected] Sun Yat-Sen University, Guangzhou, China View all articles by this author Haoran Shi [email protected] Sun Yat-Sen University, Guangzhou, China View all articles by this author Yawen Li [email protected] Sun Yat-Sen University, Guangzhou, China View all articles by this author Ziping Zheng [email protected] Sun Yat-Sen University, Guangzhou, China View all articles by this author Pu Liu [email protected] Sun Yat-Sen University, Guangzhou, China View all articles by this author Huakai Xu [email protected] Sun Yat-Sen University, Guangzhou, China View all articles by this author Yan He [email protected] Sun Yat-Sen University, Guangzhou, China View all articles by this author Guowei Yang 0000-0003-2141-6630 [email protected] Sun Yat-Sen University, Guangzhou, China View all articles by this author Metrics & Citations Metrics Article Usage 14 views 6 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation Bo Yan, Xingyuan Chen, Haoran Shi, et al. CdCS3 with the flat-band as an environmentally friendly photocatalyst for enhancing visible light absorbance and stabilizing photocatalytic hydrogen generation. Authorea . 12 May 2026. DOI: https://doi.org/10.22541/authorea.15003086/v1 If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download. For more information or tips please see 'Downloading to a citation manager' in the Help menu . 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