{"id":3526,"date":"2020-06-19T11:21:15","date_gmt":"2020-06-19T11:21:15","guid":{"rendered":"https:\/\/www.editage.com\/insights\/etching-the-road-to-a-hydrogen-economy-using-plasma-jets\/"},"modified":"2025-01-15T06:29:47","modified_gmt":"2025-01-15T06:29:47","slug":"etching-the-road-to-a-hydrogen-economy-using-plasma-jets","status":"publish","type":"post","link":"https:\/\/www.editage.com\/insights\/etching-the-road-to-a-hydrogen-economy-using-plasma-jets","title":{"rendered":"Etching the road to a hydrogen economy using plasma jets"},"content":{"rendered":"<p style=\"text-align:justify; margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"text-justify:inter-ideograph\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">The ever-worsening global environmental crisis, coupled with the depletion of fossil fuels, has motivated scientists to look for clean energy sources. Hydrogen (H<sub>2<\/sub>) can serve as an eco-friendly fuel, and hydrogen generation has become a hot research topic. While no one has yet found an energy-efficient and affordable way to produce hydrogen on a large scale, progress in this field is steady and various techniques have been proposed.<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"text-justify:inter-ideograph\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">One such technique involves using light and catalysts (materials that speed up reactions) to split water (H<sub>2<\/sub>O) into hydrogen and oxygen. The catalysts have crystalline structures and the ability to separate charges at the interfaces between some of their sides. When light hits the crystal at certain angles, the energy from the light is absorbed into the crystal, causing certain electrons to become free from their original orbits around atoms in the material. As an electron leaves its original place in the crystal, a positively charged vacancy, known as a hole, is created in the structure. Generally, these \u201cexcited\u201d states do not last long, and free electrons and holes eventually recombine. <\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"text-justify:inter-ideograph\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">This is the case with bismuth vanadate (BiVO<sub>4<\/sub>) crystal catalysts as well. BiVO<sub>4<\/sub> has been recently explored for water-splitting reactions, given its promise as a material in which charge-separation can occur upon excitation with visible light. The quick recombination of pairs of charged entities (\u201ccarriers\u201d) is a disadvantage because carriers must separately partake in reactions that break up water.<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"text-justify:inter-ideograph\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">In a recent study published in <span class=\"MsoHyperlink\" style=\"color:blue\"><span style=\"text-decoration:underline\"><i><a href=\"https:\/\/doi.org\/10.1016\/j.cej.2020.125381\" style=\"color:blue; text-decoration:underline\">Chemical Engineering Journal<\/a><\/i><\/span><\/span>, scientists from the Photocatalysis International Research Center at Tokyo University of Science, Japan, together with scientists from Northeast Normal University in China, developed a novel method to improve the charge-separation characteristics of decahedral (ten-sided) BiVO<sub>4<\/sub> crystal catalysts. Prof Terashima, lead scientist in the study, explains, \u201c<i>Recent studies have shown that carriers can be generated and separated at the interfaces between the different faces of certain crystals. In the case of BiVO<sub>4<\/sub>, however, the forces that separate carriers are too weak for electron\u2013hole pairs that are generated slightly away from the interfaces. Therefore, carrier separation in BiVO<sub>4<\/sub> decahedrons called for further improvements, which motivated us to carry out this study.\u201d<\/i><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"text-justify:inter-ideograph\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">In the technique they propose, BiVO<sub>4<\/sub> nanocrystals are exposed to what is called \u201csolution plasma discharge\u201d, a highly charged jet of energetic matter that is produced by applying high voltages between two terminals submerged in water. The plasma discharge removes some vanadium (V) atoms from the surface of specific faces of the crystals, leaving vanadium vacancies. These vacancies act as \u201celectron traps\u201d that facilitate the increased separation of carriers. Because these vacancies are in greater number on the eight side faces of the decahedron, electrons are trapped on these faces while holes accumulate on the top and bottom faces. This increased charge separation results in better catalytic performance of the BiVO<sub>4<\/sub> nanocrystals, thereby improving its water splitting performance.<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"text-justify:inter-ideograph\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">This study represents a novel use of solution plasma discharge to enhance the properties of crystals. Prof Akira Fujishima, co-author of the paper, says, \u201c<i>Our work has inspired us to reconsider other crystals that are apparently ineffective for water splitting. It provides a promising strategy using solution plasma to \u2018activate\u2019 them.<\/i>\u201d The use of solution-plasma discharge has many advantages over using conventional gaseous plasma that make it far more attractive from both technical and economic standpoints. Prof Xintong Zhang from Northeast Normal University, China, remarks, \u201c<i>Unlike gaseous plasma, which has to be generated in closed chambers, solution plasma can be generated in an open reactor at room temperature and in a normal air atmosphere. In addition, by working with crystal powders in a solution, it becomes more convenient to change the parameters of the process, and it is also easier to scale up.<\/i>\u201d <\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"text-justify:inter-ideograph\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">This study hopefully takes us one step closer to an efficient way of producing hydrogen so that we can finally do without fossil fuels and other energy sources that are harmful to our planet. Further commenting on the promise of this study, Prof Terashima says, <i>\u201cIf efficient hydrogen energy can be produced using sunlight and water, two of the most abundant resources on earth, a dream clean society could be realized.\u201d<\/i><\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\"><strong>Reference<\/strong><\/p>\n<p style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span style=\"font-size:11.0pt\"><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">Title of original paper: Solution plasma boosts facet-dependent photoactivity of decahedral BiVO<sub>4<\/sub><\/span><\/span><\/span><\/span><\/p>\n<p style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span style=\"font-size:11.0pt\"><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">Journal: <i>Chemical Engineering Journal<\/i><\/span><\/span><\/span><\/span><\/p>\n<p style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"tab-stops:130.5pt\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span style=\"font-size:11.0pt\"><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">DOI: <span class=\"MsoHyperlink\" style=\"color:blue\"><span style=\"text-decoration:underline\"><a href=\"https:\/\/doi.org\/10.1016\/j.cej.2020.125381\" style=\"color:blue; text-decoration:underline\">10.1016\/j.cej.2020.125381<\/a><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<p class=\"Default\" style=\"margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<p class=\"Default\" style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:Calibri,sans-serif\"><span style=\"color:black\"><b>About <\/b><b>the Tokyo University of Science<\/b><\/span><\/span><\/span><\/p>\n<p class=\"Default\" style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"text-justify:inter-ideograph\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span style=\"font-family:&quot;Calibri&quot;,sans-serif\"><a href=\"https:\/\/www.tus.ac.jp\/en\/mediarelations\/\">Tokyo University of Science<\/a> (TUS) is a well-known and respected university, and the largest science-specialized private research university in Japan, with four campuses in central Tokyo and its suburbs and in Hokkaido. Established in 1881, the university has continually contributed to Japan&#8217;s development in science through inculcating the love for science in researchers, technicians, and educators. <\/span><\/span><\/span><\/span><span style=\"font-size:12pt\"><span style=\"text-justify:inter-ideograph\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\">\u00a0<\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"text-justify:inter-ideograph\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">With a mission of \u201cCreating science and technology for the harmonious development of nature, human beings, and society&#8221;, TUS has undertaken a wide range of research from basic to applied science. TUS has embraced a multidisciplinary approach to research and undertaken intensive study in some of today&#8217;s most vital fields. TUS is a meritocracy where the best in science is recognized and nurtured. It is the only private university in Japan that has produced a Nobel Prize winner and the only private university in Asia to produce Nobel Prize winners within the natural sciences field. <\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:Calibri,sans-serif\"><span style=\"color:black\"><b>About Professor Chiaki Terashima from the Tokyo University of Science<\/b><\/span><\/span><\/span><\/p>\n<p class=\"Default\" style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:Calibri,sans-serif\"><span style=\"color:black\">Chiaki Terashima obtained an undergrad degree in Science and Engineering in 1994 from the Tokyo University of Science, and a PhD from the Division of Engineering of the University of Tokyo in 2003. He has been with Tokyo University of Science since 2013, where he conducts research on plasma chemistry and diamond materials. He is a member of the Photocatalyst International Research Center and also of the Research Center for Space Colony, both at the Tokyo University of Science. <\/span><\/span><\/span><\/p>\n<p class=\"Default\" style=\"margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<p style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><b><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">Funding<\/span><\/b><span style=\"font-family:&quot;Calibri&quot;,sans-serif\"> <b>information<\/b><\/span><\/span><\/span><\/p>\n<p class=\"Default\" style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:Calibri,sans-serif\"><span style=\"color:black\">This study was supported by the Natural Science Foundation of China (91833303, 51072032, 51102001 and 51872044), the Jilin Province Science and Technology Development Project (20180101175JC and 20190103100JH), the 111 Project (No. B13013), the Jilin Provincial Education Department Project (JJKH20201162KJ), the Fundamental Research Funds for the Central Universities, and the Sakura Science Program granted by the Japan Science and Technology Agency (JST).<\/span><\/span><\/span><\/p>\n<p class=\"Default\" style=\"margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<p style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><b><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">Media contact <\/span><\/b><\/span><\/span><\/p>\n<p style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span style=\"font-size:11.0pt\"><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">Tsutomu Shimizu <\/span><\/span><\/span><\/span><\/p>\n<p style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"tab-stops:125.75pt\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span style=\"font-size:11.0pt\"><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">Email: <span class=\"MsoHyperlink\" style=\"color:blue\"><span style=\"text-decoration:underline\"><a href=\"mailto:mediaoffice@admin.tus.ac.jp\" style=\"color:blue; text-decoration:underline\">mediaoffice@admin.tus.ac.jp<\/a><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The ever-worsening global environmental crisis, coupled with the depletion of fossil fuels, has motivated scientists to look for clean energy sources. Hydrogen (H2) can serve as an eco-friendly fuel, and hydrogen generation has become a hot research topic. While no one has yet found an energy-efficient and affordable way to produce hydrogen on a large [&hellip;]<\/p>\n","protected":false},"author":1152,"featured_media":33313,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[2435],"tags":[2482],"new_categories":[],"new_tags":[],"series":[],"class_list":["post-3526","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-trending-research","tag-science-update"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Etching the road to a hydrogen economy using plasma jets | Editage Insights<\/title>\n<meta name=\"description\" content=\"Tokyo University of Science (TUS) researchers have etched the road to a hydrogen economy using plasma jets\" \/>\n<meta name=\"robots\" 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