{"id":3316,"date":"2015-07-22T13:27:26","date_gmt":"2015-07-22T06:27:26","guid":{"rendered":"http:\/\/ttud.com.vn\/?p=3316"},"modified":"2017-09-27T14:29:32","modified_gmt":"2017-09-27T07:29:32","slug":"khung-nano-da-kim-giup-cai-thien-hieu-suat-chat-xuc-tac","status":"publish","type":"post","link":"https:\/\/casta.ttud.com.vn\/index.php\/khung-nano-da-kim-giup-cai-thien-hieu-suat-chat-xuc-tac\/","title":{"rendered":"Khung nano \u0111a kim gi\u00fap c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t ch\u1ea5t x\u00fac t\u00e1c"},"content":{"rendered":"<p><strong>M\u1ed9t nh\u00f3m c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u thu\u1ed9c ph\u00f2ng th\u00ed nghi\u1ec7m qu\u1ed1c gia Argonne, ph\u00f2ng th\u00ed nghi\u1ec7m qu\u1ed1c gia Berkeley v\u00e0 \u0111\u1ea1i h\u1ecdc Wisconsin \u0111\u00e3 t\u1ed5ng h\u1ee3p th\u00e0nh c\u00f4ng m\u1ed9t l\u1edbp x\u00fac t\u00e1c \u0111i\u1ec7n h\u00f3a c\u00f3 \u0111\u1ed9 b\u1ec1n v\u00e0 ho\u1ea1t t\u00ednh cao b\u1eb1ng c\u00e1ch \u201ckhai th\u00e1c\u201d s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ea5u tr\u00fac c\u1ee7a tinh th\u1ec3 nano l\u01b0\u1ee1ng kim b\u1ea1ch kim v\u00e0 niken (Pt-Ni) r\u1eafn th\u00e0nh c\u00e1c c\u1ea5u tr\u00fac gi\u1ed1ng khung x\u1ed1p ho\u1eb7c khung nano. V\u1eadt li\u1ec7u m\u1edbi n\u00e0y c\u00f3 kh\u1ea3 n\u0103ng t\u0103ng c\u01b0\u1eddng \u0111\u00e1ng k\u1ec3 ho\u1ea1t t\u00ednh x\u00fac t\u00e1c cho ph\u1ea3n \u1ee9ng kh\u1eed oxy (ph\u1ea3n \u1ee9ng t\u00e1ch m\u1ed9t ph\u00e2n t\u1eed oxy th\u00e0nh hai ion oxy), \u0111i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c pin nhi\u00ean li\u1ec7u v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng \u0111i\u1ec7n h\u00f3a ti\u1ec1m n\u0103ng kh\u00e1c.<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-3317\" src=\"http:\/\/ttud.com.vn\/wp-content\/uploads\/2017\/09\/22072015082049-duytrankhung_nano.jpg\" alt=\"\" width=\"261\" height=\"173\" \/><\/p>\n<p style=\"text-align: center;\">Minh h\u1ecda ph\u1ea3n \u1ee9ng x\u00fac t\u00e1c kh\u1eed oxy tr\u00ean b\u1ec1 m\u1eb7t khung nano platinum-nickel b\u1eb1ng c\u1ea5u tr\u00fac v\u1ecf platinum \u0111a l\u1edbp.<\/p>\n<p>Ph\u01b0\u01a1ng th\u1ee9c ti\u1ebfp c\u1eadn \u0111\u1ec3 t\u1ed5ng h\u1ee3p v\u1eadt li\u1ec7u n\u00e0y l\u00e0 m\u1ed9t c\u1ea3i ti\u1ebfn quan tr\u1ecdng \u0111\u1ed1i v\u1edbi vi\u1ec7c t\u1ea1o ra c\u00e1c ch\u1ea5t x\u00fac t\u00e1c \u0111i\u1ec7n h\u00f3a c\u00f3 c\u00e1c \u0111\u1eb7c t\u00ednh x\u00fac t\u00e1c v\u01b0\u1ee3t tr\u1ed9i, gi\u00e1 th\u00e0nh th\u1ea5p. C\u1ea5u tr\u00fac m\u1edf c\u1ee7a c\u00e1c khung nano n\u00e0y c\u00f3 th\u1ec3 gi\u1ea3i quy\u1ebft \u0111\u01b0\u1ee3c m\u1ed9t s\u1ed1 v\u1ea5n \u0111\u1ec1 v\u1ec1 thi\u1ebft k\u1ebf ti\u00eau chu\u1ea9n quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c x\u00fac t\u00e1c \u0111i\u1ec7n h\u00f3a ti\u00ean ti\u1ebfn c\u1ea5p \u0111\u1ed9 nano, bao g\u1ed3m, t\u1ef7 l\u1ec7 b\u1ec1 m\u1eb7t &#8211; kh\u1ed1i l\u01b0\u1ee3ng cao, c\u00f3 th\u1ec3 ti\u1ebfp c\u1eadn ph\u00e2n t\u1eed b\u1ec1 m\u1eb7t 3-D v\u00e0 gi\u1ea3m \u0111\u00e1ng k\u1ec3 vi\u1ec7c s\u1eed d\u1ee5ng kim lo\u1ea1i qu\u00fd. C\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u l\u1ea1c quan r\u1eb1ng ph\u01b0\u01a1ng th\u1ee9c ti\u1ebfp c\u1eadn n\u00e0y c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng \u00e1p d\u1ee5ng v\u1edbi c\u00e1c ch\u1ea5t x\u00fac t\u00e1c \u0111a kim kh\u00e1c v\u00e0 gi\u1ea3m \u0111\u00e1ng k\u1ec3 chi ph\u00ed s\u1ea3n xu\u1ea5t v\u1eadt li\u1ec7u x\u00fac t\u00e1c.<br \/>\nV\u1eadt li\u1ec7u n\u00e0y \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p b\u1eb1ng c\u00e1ch \u201ckhai th\u00e1c\u201d s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ea5u tr\u00fac c\u1ee7a tinh th\u1ec3 nano l\u01b0\u1ee1ng kim platinum-nickel (Pt-Ni) th\u00e0nh c\u00e1c c\u1ea5u tr\u00fac gi\u1ed1ng khung v\u1edbi c\u1ea5u tr\u00fac v\u1ecf Pt t\u1ef1 s\u1eafp x\u1ebfp tr\u00ean c\u00e1c b\u1ec1 m\u1eb7t b\u00ean trong v\u00e0 b\u00ean ngo\u00e0i. C\u00e1c v\u1eadt li\u1ec7u ban \u0111\u1ea7u, h\u1ea1t nanno tinh th\u1ec3 PtNi3, \u0111\u01b0\u1ee3c chuy\u1ec3n h\u00f3a trong dung d\u1ecbch, nhi\u1ec7t \u0111\u1ed9 \u00f4n h\u00f2a th\u00e0nh c\u00e1c khung nano Pt3Ni v\u1edbi c\u00e1c b\u1ec1 m\u1eb7t c\u00f3 kh\u1ea3 n\u0103ng ti\u1ebfp c\u1eadn ph\u00e2n t\u1eed b\u1ec1 m\u1eb7t ba chi\u1ec1u (3-D). C\u00e1c c\u1ea1nh gi\u1ea7u Pt c\u1ee7a c\u00e1c h\u1ea1t nano Pt3Ni ban \u0111\u1ea7u \u0111\u01b0\u1ee3c \u201cb\u1ea3o v\u1ec7\u201d trong c\u00e1c khung nano Pt3Ni. C\u1ea3 b\u1ec1 m\u1eb7t b\u00ean trong v\u00e0 b\u00ean ngo\u00e0i c\u1ee7a c\u1ea5u tr\u00fac khung m\u1edf n\u00e0y bao g\u1ed3m c\u1ea5u tr\u00fac v\u1ecf gi\u1ea7u Pt \u0111\u1ec1u b\u1ed9c l\u1ed9 kh\u1ea3 n\u0103ng t\u0103ng c\u01b0\u1eddng ho\u1ea1t t\u00ednh ph\u1ea3n \u1ee9ng kh\u1eed oxy.<\/p>\n<p>C\u00e1c ch\u1ea5t x\u00fac t\u00e1c khung nano Pt3Ni cho th\u1ea5y t\u1ed5ng ho\u1ea1t t\u00ednh x\u00fac t\u00e1c t\u0103ng h\u01a1n 36 l\u1ea7n v\u00e0 ho\u1ea1t t\u00ednh c\u1ee5 th\u1ec3 t\u0103ng 22 l\u1ea7n \u0111\u1ed1i v\u1edbi c\u00e1c ph\u1ea3n \u1ee9ng kh\u1eed oxygen so v\u1edbi c\u00e1c ch\u1ea5t x\u00fac t\u00e1c Pt d\u1ef1a tr\u00ean cacbon (Pt\/C) th\u1ebf h\u1ec7 m\u1edbi khi ti\u1ebfp x\u00fac l\u00e2u d\u00e0i v\u1edbi c\u00e1c \u0111i\u1ec1u ki\u1ec7n ph\u1ea3n \u1ee9ng.<\/p>\n<p>Nghi\u00ean c\u1ee9u n\u00e0y l\u00e0 m\u1ed9t b\u01b0\u1edbc ti\u1ebfn l\u1edbn trong vi\u1ec7c ph\u00e1t tri\u1ec3n ch\u1ea5t x\u00fac t\u00e1c \u0111i\u1ec7n h\u00f3a c\u00f3 hi\u1ec7u qu\u1ea3 h\u01a1n cho c\u00e1c ph\u1ea3n \u1ee9ng ph\u00e2n t\u00e1ch n\u01b0\u1edbc v\u00e0 t\u1ea1o nhi\u00ean li\u1ec7u. C\u00e1c c\u1ea5u tr\u00fac x\u00fac t\u00e1c \u0111i\u1ec7n h\u00f3a n\u00e0y \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng cho c\u00e1c ph\u1ea3n \u1ee9ng t\u1ecfa kh\u00ed hydrogen (HER), \u0111\u00e2y l\u00e0 ph\u1ea3n \u1ee9ng \u0111i\u1ec7n ph\u00e2n ch\u1ee7 y\u1ebfu trong \u0111i\u1ec7n ph\u00e2n n\u01b0\u1edbc &#8211; ki\u1ec1m, t\u1ea1o ra hydro b\u1eb1ng vi\u1ec7c ph\u00e2n t\u00e1ch n\u01b0\u1edbc. Ho\u1ea1t t\u00ednh HER \u0111\u1ed1i v\u1edbi b\u1ec1 m\u1eb7t khung nano v\u1ecf Pt3Ni-Pt tinh th\u1ec3 cao \u0111\u01b0\u1ee3c t\u0103ng l\u00ean m\u1ed9t c\u1ea5p so v\u1edbi Pt\/C.<\/p>\n<p>Vi\u1ec7c s\u1eed d\u1ee5ng c\u1ea5u tr\u00fac ph\u00e1t tri\u1ec3n t\u1ef1 nhi\u00ean c\u1ee7a h\u1ea1t nano l\u01b0\u1ee1ng kim t\u1eeb kh\u1ed1i \u0111a di\u1ec7n r\u1eafn \u0111\u1ebfn khung nano r\u1ed7ng v\u1edbi k\u00edch c\u1ee1, c\u1ea5u tr\u00fac v\u00e0 th\u00e0nh ph\u1ea7n b\u1ec1 m\u1eb7t \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh s\u1ebd d\u1ec5 d\u00e0ng \u00e1p d\u1ee5ng cho c\u00e1c ch\u1ea5t x\u00fac t\u00e1c \u0111a kim lo\u1ea1i kh\u00e1c.<\/p>\n<p style=\"text-align: right;\">(theo Nanowerk, 9\/4\/2015)<\/p>\n<p style=\"text-align: right;\">Ngu\u1ed3n www.vista.gov.vn<\/p>\n","protected":false},"excerpt":{"rendered":"<p>M\u1ed9t nh\u00f3m c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u thu\u1ed9c ph\u00f2ng th\u00ed nghi\u1ec7m qu\u1ed1c gia Argonne, ph\u00f2ng th\u00ed nghi\u1ec7m qu\u1ed1c gia Berkeley v\u00e0 \u0111\u1ea1i h\u1ecdc Wisconsin \u0111\u00e3 t\u1ed5ng h\u1ee3p th\u00e0nh c\u00f4ng m\u1ed9t l\u1edbp x\u00fac t\u00e1c \u0111i\u1ec7n h\u00f3a c\u00f3 \u0111\u1ed9 b\u1ec1n v\u00e0 ho\u1ea1t t\u00ednh cao b\u1eb1ng c\u00e1ch \u201ckhai th\u00e1c\u201d &#8230;<\/p>\n","protected":false},"author":17,"featured_media":3317,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[47],"tags":[],"class_list":["post-3316","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc"],"_links":{"self":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/3316","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/users\/17"}],"replies":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/comments?post=3316"}],"version-history":[{"count":2,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/3316\/revisions"}],"predecessor-version":[{"id":3319,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/3316\/revisions\/3319"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/media\/3317"}],"wp:attachment":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/media?parent=3316"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/categories?post=3316"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/tags?post=3316"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}