{"id":16509,"date":"2023-08-17T14:42:10","date_gmt":"2023-08-17T11:42:10","guid":{"rendered":"https:\/\/hho-bulgaria.com\/?post_type=green-hydrogen-news&#038;p=16509"},"modified":"2023-08-17T14:42:10","modified_gmt":"2023-08-17T11:42:10","slug":"gwangju-institute-of-science-and-technology-researchers-develop-highly-efficient-organometal-halide-perovskite-photoelectrodes-for-water-splitting","status":"publish","type":"green-hydrogen-news","link":"https:\/\/hho-bulgaria.com\/fr\/green-hydrogen-news\/gwangju-institute-of-science-and-technology-researchers-develop-highly-efficient-organometal-halide-perovskite-photoelectrodes-for-water-splitting\/","title":{"rendered":"Gwangju Institute of Science and Technology Researchers Develop Highly Efficient Organometal Halide Perovskite Photoelectrodes for Water Splitting"},"content":{"rendered":"<p>Gwangju Institute of Science and Technology researchers develop highly efficient organometal halide perovskite photoelectrodes for water splitting.<\/p>\n<p>Currently, hydrogen is mainly produced by natural gas, which, unfortunately, also generates greenhouse gases such as carbon dioxide as by-products. Scientists argue that hydrogen produced this way, while economical, is not truly sustainable, and thus requires a more eco-friendly approach for its generation.<\/p>\n<p>Photoelectrochemical (PEC) water splitting based on solar energy is one such promising approach. However, its widespread application is limited by a lack of efficient photoanodes for catalyzing the rate-limiting oxygen evolution reaction (OER), an important reaction in PEC water splitting.<\/p>\n<p>Recently, organometal halide perovskites (OHPs) have emerged as a promising photoanode material on this front. Unfortunately, OHP-based photoanodes suffer from two undesired losses that limit their efficiency.<\/p>\n<p>One is an internal loss resulting from a recombination of photogenerated charge carriers (required for electricity generation) within the anode itself, which, in turn, hinders water splitting. The other is external loss due to the slow reaction kinetics of water splitting, resulting in a loss of charge carriers at the interface of the anode and electrolyte.<\/p>\n<p>Against this background, a team of researchers from Korea and\u00a0USA, led by Professor\u00a0Sanghan Lee\u00a0from Gwangju Institute of Science and Technology and including Associate Professor\u00a0Jangwon Seo\u00a0from Korea Advanced Institute of Science and Technology, has now\u00a0developed a highly efficient OHP-based photoanode using a rational design approach, which overcomes the above limitations. Their study was\u00a0<a href=\"https:\/\/c212.net\/c\/link\/?t=0&amp;l=en&amp;o=3940082-1&amp;h=2299344434&amp;u=https%3A%2F%2Fdoi.org%2F10.1002%2Faenm.202300951&amp;a=published+in+the+journal+Advanced+Energy+Materials\" target=\"_blank\" rel=\"noreferrer noopener\">published in the journal\u00a0<em>Advanced Energy Materials<\/em><\/a>\u00a0on\u00a0June 17, 2023.<\/p>\n<p><strong>Prof. Lee<\/strong>\u00a0said:<\/p>\n<blockquote class=\"wp-block-quote\"><p>The\u00a0high efficiency of the photoanode for photoelectrochemical water splitting was achieved through the simultaneous suppression of internal and external losses of photogenerated carriers.<\/p><\/blockquote>\n<p>In their work, the team fabricated a novel Fe-doped Ni<sub>3<\/sub>S<sub>2<\/sub>\/Ni foil\/OHP photoanode in three steps. They first synthesized the Fe-doped Ni<sub>3<\/sub>S<sub>2\u00a0<\/sub>catalyst for OER on Ni foil through a hydrothermal method followed by a chemical conversion. They then separately fabricated the OHP photovoltaic cell consisting of SnO<sub>2<\/sub>\u00a0electron transport layers (ETLs) through spin coating. Finally, they combined the two components to obtain the photoanode.<\/p>\n<p>The team found that adding glycidyltrimethylammonium chloride (GTMACl) to the anode passivated the defects at the OHP\/ETL interface, effectively suppressing the undesired charge carrier recombination within the anode. Further, it enhanced the light-soaking stability of the OHP cell, a crucial factor in real-world PEC water splitting. Additionally, the high catalytic activity of Fe-doped Ni<sub>3<\/sub>S<sub>2<\/sub>\u00a0ensured a high OER rate at the anode, reducing the loss of photogenerated carriers within the electrolyte.<\/p>\n<p>Consequently, the Fe-doped Ni<sub>3<\/sub>S<sub>2<\/sub>\/Ni foil\/OHP photoanode exhibited an unprecedented applied bias photon-to-current conversion efficiency of 12.79%, higher than that reported for OHP-based photoanodes in existing studies.<\/p>\n<p>Overall, this study provides important insights into the prospects of rationally designed OHP-based photoelectrodes, as Prof. Lee highlights:\u00a0<em>\u201c<\/em>The proposed technology is expected to contribute to the vitalization of the hydrogen economy and carbon neutrality by enabling a large-scale and eco-friendly hydrogen production using solar energy without external voltage in the next 10 years. This, in turn, will help realize hydrogen as an ideal renewable source of energy in the future.\u201d<\/p>\n<p>And we sure hope the researcher\u2019s vision is realized soon!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Gwangju Institute of Science and Technology researchers develop highly efficient organometal halide perovskite photoelectrodes for water splitting.<\/p>\n","protected":false},"featured_media":16504,"parent":0,"menu_order":0,"template":"","news-category":[],"class_list":["post-16509","green-hydrogen-news","type-green-hydrogen-news","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Gwangju Institute of Science and Technology Researchers Develop Highly Efficient Organometal Halide Perovskite Photoelectrodes for Water Splitting &#187; HHO \u0411\u044a\u043b\u0433\u0430\u0440\u0438\u044f | HHO Bulgaria<\/title>\n<meta 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