{"id":2367,"date":"2026-05-01T13:59:33","date_gmt":"2026-05-01T04:59:33","guid":{"rendered":"https:\/\/supraceramics.jp\/?p=2367"},"modified":"2026-05-01T13:59:33","modified_gmt":"2026-05-01T04:59:33","slug":"publication-j-am-chem-soc-onda-maeda-et-al-elucidating-the-origin-of-hidden-limitations-in-ru-complex-ag-polymeric-carbon-nitride-hybrid-photocatalysts-for-visible-light-co2-reducti","status":"publish","type":"post","link":"https:\/\/supraceramics.jp\/en\/2026\/05\/2367\/","title":{"rendered":"Publication | J. Am. Chem. Soc. (Onda, Maeda et al.) \u201cElucidating the Origin of Hidden Limitations in Ru-Complex\/Ag\/Polymeric Carbon Nitride Hybrid Photocatalysts for Visible-Light CO2 Reduction\u201d"},"content":{"rendered":"<p>Elucidating the Origin of Hidden Limitations in Ru-Complex\/Ag\/Polymeric Carbon Nitride Hybrid Photocatalysts for Visible-Light CO2 Reduction<\/p>\n<p>Ryuichi Nakada, Rikuya Nagao, Jo Onodera, Xian Zhang, Masahito Oura, Megumi Okazaki, Toshiya Tanaka, Riku Koda, Minato Tanaka, Ken Onda, Kazuhiko Maeda*<\/p>\n<p>Artificial photosynthesis that converts CO<sub>2<\/sub> into value-added chemicals under mild conditions remains a key goal in sustainable catalysis. Hybrid photocatalysts that integrate molecular CO<sub>2<\/sub> reduction cocatalysts with semiconductor light absorbers provide a versatile platform to combine molecular-level selectivity with solid-state photostability. However, their quantum efficiencies have generally remained low, partly because side reactions of the molecular component have been overlooked. Here we show that suppressing a photochemical ligand-exchange reaction of a surface-anchored Ru complex, <i>trans<\/i>(Cl)-[Ru(bpy(CH<sub>2<\/sub>PO<sub>3<\/sub>H<sub>2<\/sub>)<sub>2<\/sub>)(CO)<sub>2<\/sub>Cl<sub>2<\/sub>], markedly enhances photocatalytic CO<sub>2<\/sub> reduction over a well-established Ag-loaded polymeric carbon nitride hybrid. The suppression of this undesirable photochemical reaction is achievable under low-intensity visible light when the Ru complex is loaded at a high density. The optimized system achieves selective CO<sub>2<\/sub>-to-formate conversion with an apparent quantum yield of 27.7% at 400 nm and a formate selectivity greater than 99%. Spectroscopic analyses reveal that the suppression of photochemical ligand exchange maintains the original Ru coordination environment with large driving force for CO<sub>2<\/sub> reduction, thereby stabilizing the catalytic cycle and facilitating efficient interfacial electron transfer. These results reveal an unrecognized limitation in molecule\/semiconductor hybrid photocatalysts\u2500photochemical ligand exchange of the molecular cocatalyst\u2500and demonstrate that controlling such side reactions offers an important strategy to design high-efficiency CO<sub>2<\/sub> reduction systems.<\/p>\n<p>J. Am. Chem. Soc. 2026, 148 (10), 10924-10933.<\/p>\n<p><a href=\"https:\/\/pubs.acs.org\/doi\/10.1021\/jacs.5c21374\" rel=\"nofollow\">https:\/\/pubs.acs.org\/doi\/10.1021\/jacs.5c21374<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Elucidating the Origin of Hidden Limitations in Ru-Complex\/Ag\/Polymeric Carbon Nitride Hybrid Photocatalysts for Visible-Light CO2 Reduction Ryuichi Nakada, Rikuya Nagao, Jo Onodera, Xian Zhang, Masahito Oura, Megumi Okazaki, Toshiya Tanaka, Riku Koda, Minato Tanaka, Ken Onda, Kazuhiko Maeda* Artificial photosynthesis that converts CO2 into value-added chemicals under mild conditions remains a key goal in sustainable [&hellip;]<\/p>\n","protected":false},"author":222414606,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"_themeisle_gutenberg_block_has_review":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_locale":"en_US","_original_post":"https:\/\/supraceramics.jp\/?p=2364","_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[124830],"tags":[],"class_list":["post-2367","post","type-post","status-publish","format-standard","hentry","category-news","en-US"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/pe2JgX-Cb","jetpack-related-posts":[{"id":2364,"url":"https:\/\/supraceramics.jp\/2026\/05\/2364\/","url_meta":{"origin":2367,"position":0},"title":"Publication | J. Am. Chem. Soc. (Onda, Maeda et al.) \u201cElucidating the Origin of Hidden Limitations in Ru-Complex\/Ag\/Polymeric Carbon Nitride Hybrid Photocatalysts for Visible-Light CO2 Reduction\u201d","author":"shorike","date":"2026\u5e745\u67081\u65e5","format":false,"excerpt":"\u7814\u7a76\u6210\u679c\uff1a\u5149\u306e\u201c\u5f53\u3066\u3059\u304e\u201d\u306b\u6ce8\u610f\u3057\u3066\u9ad8\u52b9\u7387CO2\u9084\u5143\u3092\u5b9f\u73fe\uff08C02\u524d\u7530\u3001B03\u6069\u7530\u3089\uff09 CO2\u3092\u5149\u30a8\u30cd\u30eb\u30ae\u30fc\u3067\u6709\u7528\u7269\u8cea\u3078\u5909\u63db\u3059\u308b\u4eba\u5de5\u5149\u5408\u6210\u3067\u306f\u3001\u932f\u4f53\u5206\u5b50\u89e6\u5a92\u306e\u9ad8\u3044\u9078\u629e\u6027\u3068\u534a\u5c0e\u4f53\u306e\u512a\u308c\u305f\u5149\u5438\u53ce\u7279\u6027\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u7cfb\u304c\u6709\u671b\u8996\u3055\u308c\u3066\u304d\u307e\u3057\u305f\u3002\u3057\u304b\u3057\u3001\u5b9f\u969b\u306e\u53cd\u5fdc\u52b9\u7387\u306f\u671f\u5f85\u307b\u3069\u5411\u4e0a\u305b\u305a\u3001\u305d\u306e\u8981\u56e0\u306f\u4e0d\u660e\u78ba\u3067\u3057\u305f\u3002\u672c\u7814\u7a76\u3067\u306f\u3001\u534a\u5c0e\u4f53\u8868\u9762\u306b\u56fa\u5b9a\u5316\u3057\u305f\u30eb\u30c6\u30cb\u30a6\u30e0\u932f\u4f53\u304c\u5149\u3092\u76f4\u63a5\u5438\u53ce\u3059\u308b\u3068\u4e0d\u8981\u306a\u5149\u5316\u5b66\u53cd\u5fdc\u304c\u9032\u884c\u3057\u3001\u89e6\u5a92\u69cb\u9020\u306e\u5909\u5316\u3092\u4f34\u3063\u3066CO2\u9084\u5143\u6d3b\u6027\u304c\u8457\u3057\u304f\u4f4e\u4e0b\u3059\u308b\u3053\u3068\u3092\u898b\u51fa\u3057\u305f\u3002\u305d\u3053\u3067\u5206\u5b50\u89e6\u5a92\u306e\u8868\u9762\u5bc6\u5ea6\u3068\u5149\u5f37\u5ea6\u3092\u7cbe\u5bc6\u306b\u5236\u5fa1\u3057\u3001\u534a\u5c0e\u4f53\u306e\u307f\u3092\u52b9\u7387\u7684\u306b\u52b1\u8d77\u3059\u308b\u8a2d\u8a08\u3092\u5c0e\u5165\u3057\u305f\u7d50\u679c\u3001\u53ef\u8996\u5149\u4e0b\u3067CO2\u3092\u30ae\u9178\u3078\u307b\u307c\u5b8c\u5168\u306b\u5909\u63db\u3059\u308b\u9ad8\u9078\u629e\u6027\uff0899%\u4ee5\u4e0a\uff09\u3068\u3001\u30cf\u30a4\u30d6\u30ea\u30c3\u30c9\u7cfb\u3068\u3057\u3066\u4e16\u754c\u6700\u9ad8\u6c34\u6e96\u306e\u898b\u304b\u3051\u91cf\u5b50\u53ce\u7387\uff0827.7%\uff09\u3092\u9054\u6210\u3057\u307e\u3057\u305f\u3002\u672c\u6210\u679c\u306f\u3001\u932f\u4f53\u5206\u5b50\u89e6\u5a92\u306e\u5149\u5438\u53ce\u5236\u5fa1\u304c\u9ad8\u52b9\u7387\u4eba\u5de5\u5149\u5408\u6210\u306e\u9375\u3067\u3042\u308b\u3053\u3068\u3092\u793a\u3059\u91cd\u8981\u306a\u6307\u91dd\u3068\u306a\u308a\u307e\u3059\u3002\u672c\u6210\u679c\u306f\u3001J. Am. Chem. Soc.\u8a8c\u306b\u30aa\u30f3\u30e9\u30a4\u30f3\u63b2\u8f09\u3055\u308c\u307e\u3057\u305f\u3002 \u8ad6\u6587\u60c5\u5831 Elucidating the Origin of Hidden Limitations in Ru-Complex\/Ag\/Polymeric Carbon Nitride Hybrid Photocatalysts for Visible-Light CO2 Reduction Ryuichi Nakada, Rikuya Nagao, Jo Onodera, Xian Zhang, Masahito Oura, Megumi Okazaki, Toshiya Tanaka, Riku Koda, Minato Tanaka, Ken Onda, Kazuhiko Maeda* J. Am. Chem. Soc. 2026, 148\u2026","rel":"","context":"In &quot;News&quot;","block_context":{"text":"News","link":"https:\/\/supraceramics.jp\/en\/category\/news\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":2304,"url":"https:\/\/supraceramics.jp\/en\/2026\/02\/2304\/","url_meta":{"origin":2367,"position":1},"title":"Publication | ACS Catal. (Katagiri, Maeda et al.) \u201cProtective Reaction Fields Created by Deep Eutectic Solvents against Molecular Oxygen in CO2 Reduction over Ru(II)-Complex\/Ag\/Polymeric Carbon Nitride Hybrid Photocatalysts\u201d","author":"shorike","date":"2026\u5e742\u670812\u65e5","format":false,"excerpt":"Photocatalytic CO2 reduction into value-added fuels has garnered considerable attention as a strategy to mitigate global warming and fossil fuel depletion. However, under practical aerobic conditions, photocatalytic activity often declines dramatically due to undesirable O2-photoreduction. Here, we show that deep eutectic solvents (DESs) can provide a protective reaction field against\u2026","rel":"","context":"In &quot;News&quot;","block_context":{"text":"News","link":"https:\/\/supraceramics.jp\/en\/category\/news\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":2308,"url":"https:\/\/supraceramics.jp\/en\/2026\/02\/2308\/","url_meta":{"origin":2367,"position":2},"title":"Publication | Artif. Photosynth. (Onda, Maeda et al.) \u201cDesign Strategy for Heteroleptic Ir(III) Photosensitizers with Spatially Separated Excited Electrons toward Efficient CO2 Reduction\u201d","author":"shorike","date":"2026\u5e742\u670812\u65e5","format":false,"excerpt":"Hybrid photocatalysts that integrate functional molecular units with semiconductor surfaces offer a promising route toward efficient artificial photosynthesis, yet controlling interfacial charge transfer dynamics remains a major challenge. Here we report a series of heteroleptic Ir(III) complex photosensitizers bearing 1-phenylisoquinoline ligands with phosphonic acid anchoring groups, designed to regulate the\u2026","rel":"","context":"In &quot;News&quot;","block_context":{"text":"News","link":"https:\/\/supraceramics.jp\/en\/category\/news\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":2302,"url":"https:\/\/supraceramics.jp\/2026\/02\/2302\/","url_meta":{"origin":2367,"position":3},"title":"Publication | ACS Catal. (Katagiri, Maeda et al.) \u201cProtective Reaction Fields Created by Deep Eutectic Solvents against Molecular Oxygen in CO2 Reduction over Ru(II)-Complex\/Ag\/Polymeric Carbon Nitride Hybrid Photocatalysts\u201d","author":"shorike","date":"2026\u5e742\u670812\u65e5","format":false,"excerpt":"\u7814\u7a76\u6210\u679c\uff1a\u6df1\u5171\u6676\u6eb6\u5a92\u3092\u4f7f\u3063\u3066\u9178\u7d20\u5b58\u5728\u4e0b\u3067\u3082CO2\u9084\u5143\u3092\u5b9f\u73fe\uff08C02\u524d\u7530\u3001A01\u7247\u6850\u3089\uff09 \u6982\u8981 \u5149\u89e6\u5a92\u306b\u3088\u308bCO2\u9084\u5143\u306f\u5730\u7403\u6e29\u6696\u5316\u3084\u5316\u77f3\u71c3\u6599\u67af\u6e07\u3078\u306e\u5bfe\u7b56\u3068\u3057\u3066\u6ce8\u76ee\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u5b9f\u74b0\u5883\u306b\u8fd1\u3044\u9178\u7d20\u5b58\u5728\u4e0b\u3067\u306f\u3001\u9178\u7d20\u306e\u5149\u9084\u5143\u306b\u3088\u308a\u6d3b\u6027\u304c\u5927\u304d\u304f\u4f4e\u4e0b\u3059\u308b\u3068\u3044\u3046\u8ab2\u984c\u304c\u3042\u308a\u307e\u3057\u305f\u3002\u672c\u7814\u7a76\u3067\u306f\u3001\u6df1\u5171\u6676\u6eb6\u5a92\u304c\u9178\u7d20\u3092\u906e\u853d\u3059\u308b\u53cd\u5fdc\u5834\u3068\u3057\u3066\u6a5f\u80fd\u3057\u3001Ru(II)\u932f\u4f53\/Ag\/\u30dd\u30ea\u30de\u30fc\u72b6\u7a92\u5316\u70ad\u7d20\u304b\u3089\u306a\u308b\u30cf\u30a4\u30d6\u30ea\u30c3\u30c9\u5149\u89e6\u5a92\u306b\u3088\u308bCO2\u9084\u5143\u6d3b\u6027\u3092\u7dad\u6301\u3067\u304d\u308b\u3053\u3068\u3092\u793a\u3057\u307e\u3057\u305f\u3002\u5869\u5316\u30b3\u30ea\u30f3\u3068\u30a8\u30c1\u30ec\u30f3\u30b0\u30ea\u30b3\u30fc\u30eb\u304b\u3089\u306a\u308b\u6df1\u5171\u6676\u6eb6\u5a92\u30a8\u30bf\u30ea\u30f3\u4e2d\u3067\u306f\u3001\u30ae\u9178\u751f\u6210\u306e\u56de\u8ee2\u65701300\u3001\u9078\u629e\u738796%\u3092\u9054\u6210\u3057\u3001\u7a7a\u6c17\u5b58\u5728\u4e0b\u3067\u3082\u9ad8\u3044\u6d3b\u6027\u3092\u4fdd\u6301\u3057\u307e\u3057\u305f\u3002\u3053\u308c\u306f\u30a8\u30bf\u30ea\u30f3\u306e\u4f4e\u3044\u9178\u7d20\u6eb6\u89e3\u5ea6\u3068\u62e1\u6563\u4fc2\u6570\u306b\u8d77\u56e0\u3059\u308b\u3082\u306e\u3067\u3042\u308a\u3001\u5b9f\u7528\u7684\u306aCO2\u5149\u9084\u5143\u306b\u5411\u3051\u305f\u6709\u671b\u306a\u6eb6\u5a92\u8a2d\u8a08\u6307\u91dd\u3092\u793a\u3059\u6210\u679c\u3067\u3059\u3002\u672c\u6210\u679c\u306f\u3001ACS Catal.\u8a8c\u306b\u30aa\u30f3\u30e9\u30a4\u30f3\u63b2\u8f09\u3055\u308c\u307e\u3057\u305f\u3002 Protective Reaction Fields Created by Deep Eutectic Solvents against Molecular Oxygen in CO2 Reduction over Ru(II)-Complex\/Ag\/Polymeric Carbon Nitride Hybrid Photocatalysts \u00a0 Jo Onodera, Xian Zhang, Toshiya Tanaka, Ryuichi Nakada, Megumi Okazaki, Naoki Tarutani, Kiyofumi Katagiri, Kazuhiko Maeda* \u00a0 ACS Catal. 2026, in press.","rel":"","context":"In &quot;News&quot;","block_context":{"text":"News","link":"https:\/\/supraceramics.jp\/en\/category\/news\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":2253,"url":"https:\/\/supraceramics.jp\/en\/2025\/12\/2253\/","url_meta":{"origin":2367,"position":4},"title":"Publication | ACS Catal. (Maeda, Onda et al.) \u201cCharge Transfer Dynamics in Dye-Sensitized Photocatalysts Using Metal Complex Sensitizers with Long-Wavelength Visible Light Absorption Based on Singlet\u2013Triplet Excitation\u201d","author":"shorike","date":"2025\u5e7412\u67086\u65e5","format":false,"excerpt":"Charge Transfer Dynamics in Dye-Sensitized Photocatalysts Using Metal Complex Sensitizers with Long-Wavelength Visible Light Absorption Based on Singlet\u2013Triplet Excitation Haruka Yamamoto, Toshiya Tanaka, Masahito Oura, Kelly M. Kopera, Megumi Okazaki, Ken Onda, Thomas E. Mallouk,* Kazuhiko Maeda* An Os(II) polypyridyl complex was applied as a photosensitizer in dye-sensitized photocatalyst systems\u2026","rel":"","context":"In &quot;News&quot;","block_context":{"text":"News","link":"https:\/\/supraceramics.jp\/en\/category\/news\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1888,"url":"https:\/\/supraceramics.jp\/en\/2023\/06\/1888\/","url_meta":{"origin":2367,"position":5},"title":"Publication | Angew. Chem. Int. Ed. (Maeda, Tanaka, Motohashi et al.) \u201cTin(II)-Based Metal\u2013Organic Frameworks Enabling Efficient, Selective Reduction of CO2 to Formate under Visible Light\u201d","author":"shorike","date":"2023\u5e746\u67083\u65e5","format":false,"excerpt":"Tin(II)-Based Metal\u2013Organic Frameworks Enabling Efficient, Selective Reduction of CO \u2082 to Formate under Visible Light Yoshinobu Kamakura, Chomponoot Suppaso, Issei Yamamoto, Ryusuke Mizuochi, Yusuke Asai, Teruki Motohashi, Daisuke Tanaka, Kazuhiko Maeda Certain metal complexes are known as high-performance CO2 reduction photocatalysts driven by visible light. However, most of them rely\u2026","rel":"","context":"In &quot;News&quot;","block_context":{"text":"News","link":"https:\/\/supraceramics.jp\/en\/category\/news\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"_links":{"self":[{"href":"https:\/\/supraceramics.jp\/wp-json\/wp\/v2\/posts\/2367","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/supraceramics.jp\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/supraceramics.jp\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/supraceramics.jp\/wp-json\/wp\/v2\/users\/222414606"}],"replies":[{"embeddable":true,"href":"https:\/\/supraceramics.jp\/wp-json\/wp\/v2\/comments?post=2367"}],"version-history":[{"count":1,"href":"https:\/\/supraceramics.jp\/wp-json\/wp\/v2\/posts\/2367\/revisions"}],"predecessor-version":[{"id":2368,"href":"https:\/\/supraceramics.jp\/wp-json\/wp\/v2\/posts\/2367\/revisions\/2368"}],"wp:attachment":[{"href":"https:\/\/supraceramics.jp\/wp-json\/wp\/v2\/media?parent=2367"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/supraceramics.jp\/wp-json\/wp\/v2\/categories?post=2367"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/supraceramics.jp\/wp-json\/wp\/v2\/tags?post=2367"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}