{"id":95745,"date":"2017-08-12T14:00:25","date_gmt":"2017-08-12T06:00:25","guid":{"rendered":"http:\/\/www.cailiaoniu.com\/?p=95745"},"modified":"2017-08-13T23:38:51","modified_gmt":"2017-08-13T15:38:51","slug":"nat-commun-%ef%bc%9a%e5%8e%9f%e5%ad%90%e7%ba%a7%e5%8e%9f%e4%bd%8d%e8%a7%82%e5%af%9fpt3co%e7%ba%b3%e7%b1%b3%e9%a2%97%e7%b2%92%e4%b8%ad%e6%b0%a7-%e9%a9%b1%e5%8a%a8%e6%a0%b8%e5%a3%b3%e7%bb%93%e6%9e%84","status":"publish","type":"post","link":"http:\/\/www.cailiaoniu.com\/?p=95745","title":{"rendered":"Nat. Commun.\uff1a\u539f\u5b50\u7ea7\u539f\u4f4d\u89c2\u5bdfPt3Co\u7eb3\u7c73\u9897\u7c92\u4e2d\u6c27-\u9a71\u52a8\u6838\u58f3\u7ed3\u6784\u7684\u5f62\u6210\u8fc7\u7a0b"},"content":{"rendered":"

\u3010\u5f15\u8a00\u3011<\/strong><\/p>\n

\u91d1\u5c5e\u94c2(Pt)\u662f\u6700\u4e3a\u5e38\u7528\u7684\u71c3\u6599\u7535\u6c60\u50ac\u5316\u5242\uff0c\u7136\u800c\u76f8\u5bf9\u6709\u9650\u7684\u50a8\u91cf\u548c\u76f8\u5bf9\u8f83\u9ad8\u7684\u6210\u672c\u5f88\u5927\u7a0b\u5ea6\u4e0a\u9650\u5236\u4e86\u71c3\u6599\u7535\u6c60\u7684\u5168\u9762\u666e\u53ca\u3002\u6838\u58f3\u7ed3\u6784\u7684\u94c2-\u91d1\u5c5e\u7eb3\u7c73\u9897\u7c92\u4e0d\u4ec5\u6210\u672c\u76f8\u5bf9\u8f83\u4f4e\uff0c\u800c\u4e14\u6c27\u8fd8\u539f\u53cd\u5e94(ORR)\u6d3b\u6027\u8fdc\u9ad8\u4e8e\u7eafPt\uff0c\u6709\u671b\u6210\u4e3a\u66ff\u4ee3Pt\u7684\u7406\u60f3\u50ac\u5316\u5242\u3002\u7814\u7a76\u53d1\u73b0\uff1a\u58f3\u5c42\u7ed3\u6784\u7684\u538b\u5e94\u53d8\u548c\u914d\u4f53\u6548\u5e94\u662f\u5bfc\u81f4ORR\u50ac\u5316\u6d3b\u6027\u589e\u5f3a\u7684\u4e3b\u8981\u539f\u56e0\uff1b\u540e\u5904\u7406\u53ef\u4ee5\u63a7\u5236Pt\u58f3\u5c42\u7684\u7ec4\u6210\uff0c\u589e\u5f3a\u5176ORR\u50ac\u5316\u6d3b\u6027\u3002\u9700\u8981\u6307\u51fa\u7684\u662f\uff0c\u867d\u7136\u76ee\u524d\u53ef\u4ee5\u5b9e\u73b0\u5728\u53cc\u91d1\u5c5e\u5185\u6838\u4e0a\u751f\u957fPt\u58f3\u5c42\uff0c\u4f46\u662f\u6709\u5173\u6838-\u58f3\u7ed3\u6784\u5f62\u6210\u7684\u8be6\u7ec6\u8fc7\u7a0b\u4ecd\u5904\u6709\u5f85\u8fdb\u4e00\u6b65\u6df1\u5165\u7814\u7a76\u3002\u6838-\u58f3\u7ed3\u6784\u7684\u5f62\u6210\u8fc7\u7a0b\u5b58\u5728\u4e09\u4e2a\u5173\u952e\u95ee\u9898\uff1a\u7b2c\u4e00\uff0c\u539f\u5b50\u5c3a\u5ea6\u4e0a\u5b9e\u73b0\u5bf9\u6838-\u58f3\u7684\u5f62\u6210\u8fc7\u7a0b\u7684\u5b9e\u65f6\u76f4\u63a5\u8ddf\u8e2a\uff1b\u7b2c\u4e8c\uff0c\u627e\u5230\u53cd\u5e94\u6761\u4ef6\u4e0b\u6838-\u58f3\u7ed3\u6784\u5f62\u6210\u7684\u63a8\u52a8\u529b\uff1b\u7b2c\u4e09\uff0c\u7814\u7a76Pt\u58f3\u751f\u957f\u548c\u8c03\u63a7\u7684\u65b0\u673a\u5236\u3002<\/p>\n

\u3010\u6210\u679c\u7b80\u4ecb\u3011<\/strong><\/p>\n

\u8fd1\u65e5\uff0c\u52a0\u5dde\u5927\u5b66-\u5c14\u6e7e\u5206\u6821\u7684\u6f58\u6653\u6674\uff08\u901a\u8baf\u4f5c\u8005\uff09<\/strong>\u7b49\u5728Nature Communications<\/strong>\u53d1\u8868\u4e86\u9898\u4e3a\u201cIn situ atomic-scale observation of oxygen-driven core-shell formation in Pt3<\/sub>Co nanoparticles\u201d<\/strong>\u7684\u7814\u7a76\u8bba\u6587\uff0c\u62a5\u9053\u4e86\u539f\u5b50\u7ea7\u539f\u4f4d\u89c2\u5bdfPt3<\/sub>Co\u7eb3\u7c73\u9897\u7c92\u4e2d\u6838\u58f3\u7ed3\u6784\u7684\u5f62\u6210\u8fc7\u7a0b\u7684\u6700\u65b0\u7814\u7a76\u6210\u679c\u3002\u7814\u7a76\u56e2\u961f\u501f\u52a9\u5148\u8fdb\u7684\u539f\u4f4d\u900f\u5c04\u7535\u5b50\u663e\u5fae\u955c\u63ed\u793a\u4e86\u5e38\u538b\u9ad8\u6e29\u4e0bPt-Co\u7eb3\u7c73\u9897\u7c92\u4e0d\u5bfb\u5e38\u7684\u58f3\u6838\u7ed3\u6784\u5f62\u6210\u8fc7\u7a0b\u3002\u7814\u7a76\u53d1\u73b0\uff1a\u9996\u5148\u8868\u9762\u91d1\u5c5ePt\u8584\u5c42\u7684\u504f\u6790\u4e0e\u91d1\u5c5e\u95f4\u5185\u6838\u7684\u6709\u5e8f\u5316\u540c\u65f6\u53d1\u751f\uff0c\u968f\u540e\u5728\u6c27\u9000\u706b\u5904\u7406\u671f\u95f4\u901a\u8fc7Ostwald\u719f\u5316\u9010\u5c42\u751f\u957fPt\u58f3\u5c42\u3002\u57fa\u4e8e\u5bc6\u5ea6\u6cdb\u51fd\u7406\u8bba\u7684\u8ba1\u7b97\u8868\u660e\uff1a\u6838\u58f3\u7ed3\u6784\u7684\u5f62\u6210\u8fc7\u7a0b\u6cbf\u7740\u80fd\u91cf\u964d\u4f4e\u7684\u9014\u5f84\u8fdb\u884c\u3002\u8be5\u53d1\u73b0\u5bf9\u4e8e\u672a\u6765\u8bbe\u8ba1\u7ed3\u6784\u5316\u94c2\u5408\u91d1\u7eb3\u7c73\u50ac\u5316\u5242\u63d0\u4f9b\u4e86\u4e00\u5b9a\u7684\u601d\u8def\u53c2\u8003\u3002<\/p>\n

\u3010\u56fe\u6587\u5bfc\u8bfb\u3011<\/strong><\/p>\n

\u56fe1. Pt3<\/sub>Co\/C\u7684XRD\u548cSTEM\u8868\u5f81\u7ed3\u679c<\/strong><\/p>\n

\"\"<\/p>\n

(a) Pt3<\/sub>Co\/C\u548cPt\/C\u7684XRD\u7279\u5f81\u884d\u5c04\u8c31\u56fe\uff0c\u63d2\u56fe\u4e3a\u5c40\u90e8\u653e\u5927\u7684(220)\u7279\u5f81\u884d\u5c04\u5cf0\uff1b<\/p>\n

(b) Pt3<\/sub>Co NP\u6cbf[011]\u533a\u57df\u8f74\u7684HAADF-STEM\u56fe\u7247\u3002\u6bd4\u4f8b\u5c3a\uff1a2 nm\uff1b<\/p>\n

(c) (b)\u4e2d\u7eb3\u7c73\u9897\u7c92\u7684FFT\u56fe\u6848\uff1b<\/p>\n

(d) \u6cbf<110>\u533a\u57df\u8f74\u7684\u516b\u9762\u4f53\u6a21\u578b\u622a\u9762\u7684\u6295\u5f71\u3002\u7eff\u8272\u7403\u4f53\u5bf9\u5e94\u4e8e\u5728\u65e0\u5e8fPt3<\/sub>Co\u76f8\u4e2d\u968f\u673a\u5206\u5e03\u7684Pt\u539f\u5b50\u548cCo\u539f\u5b50\u3002<\/p>\n

\u56fe2. \u6c27\u6c14\u6c1b\u56f4\u4e2d720 \u2103\u9000\u706b\uff0cPt3<\/sub>Co NP\u7684\u539f\u4f4d\u7ed3\u679c<\/strong><\/p>\n

\"\"<\/p>\n

(a) HAADF-STEM\u56fe\u50cf\uff0c\u8868\u660e\u5728\u6c27\u6c14\u6c1b\u56f4\u4e2d\u9000\u706b30\u5206\u949f\u540e\u5f97\u5230Pt3<\/sub>Co NP\u3002\u6bd4\u4f8b\u5c3a\uff1a2 nm\uff1b<\/p>\n

(b) (a)\u4e2d\u7eb3\u7c73\u9897\u7c92\u7684FFT\u56fe\u6848\uff1b<\/p>\n

(c) L12<\/sub>\u76f8\u7684\u5355\u5143\u8868\u660ePt3<\/sub>Co\u4e3a\u6709\u5e8f\u7684\u91d1\u5c5e\u95f4\u7ed3\u6784\u3002 \u9ec4\u8272\u548c\u84dd\u8272\u7403\u4f53\u5206\u522b\u4ee3\u8868Pt\u548cCo\u539f\u5b50\uff1b<\/p>\n

(d) \u4ece\u84dd\u8272\u6846\u4e2d\u53d6\u51fa\u7684\u6709\u5e8f\u91d1\u5c5e\u95f4\u7279\u5f81\u7684\u5047\u5f69\u8272\u88c1\u526a\u56fe\u50cf\uff0c\u5206\u522b\u7531\u84dd\u8272\u548c\u9ed1\u8272\u7bad\u5934\u6307\u793a\u7684\u7ebf\u6761\u7684\u5f3a\u5ea6\u56fe\uff1b<\/p>\n

(e) (a)\u4e2d\u7684\u7ea2\u8272\u6846\u4e2d (100)\u8868\u9762\u7684\u653e\u5927\u7684\u5047\u5f69\u8272\u56fe\u50cf\uff0c\u4ee5\u53ca\u6cbf\u7740\u7531\u7eff\u8272\u548c\u84dd\u8272\u77e9\u5f62\u6807\u8bb0\u7684\u539f\u5b50\u5c42\u83b7\u5f97\u7684\u5f3a\u5ea6\u56fe\uff0c\u663e\u793a\u4e86\u5206\u79bb\u7684\u5bccPt\u8868\u9762\u3002\u6bd4\u4f8b\u5c3a\uff1a2\u00c5\uff1b<\/p>\n

(f) \u5177\u6709Pt\u5206\u79bb\u8868\u9762\u7684L12<\/sub>\u91d1\u5c5e\u95f4Pt3<\/sub>Co\u6a21\u578b\u7684\u6a21\u62dfHAADF-STEM\u56fe\u50cf\uff0c\u7eff\u8272\u548c\u84dd\u8272\u77e9\u5f62\u6807\u8bb0\u7684\u4e24\u4e2a\u539f\u5b50\u5c42\u7684\u5f3a\u5ea6\u66f2\u7ebf\u3002<\/p>\n

\u56fe3. \u6c27\u6c14\u6c1b\u56f4\u4e2d\u9000\u706b\u671f\u95f4(100)Pt\u58f3\u5c42\u7684\u9010\u5c42\u751f\u957f<\/strong><\/p>\n

\"\"<\/p>\n

(a-c) 300 \u2103\u6c27\u6c14\u9000\u706b\u8fc7\u7a0b\u4e2d\uff0c\u9000\u706b\u65f6\u95f4\u4e3a0 s\uff0c64 s\u548c128 s\u62cd\u6444\u7684HAADF\u56fe\u50cf\u3002 \u6bd4\u4f8b\u5c3a\uff1a2 nm\uff1b<\/p>\n

(d-f) (a-c)\u4e2d\u7684(100)\u8868\u9762\u76f8\u5e94\u653e\u5927\u7684\u5047\u8272\u9762\u3002\u9ec4\u8272\u548c\u84dd\u8272\u7403\u4f53\u5206\u522b\u4ee3\u8868Pt\u539f\u5b50\u548cCo\u539f\u5b50\u3002\u6bd4\u4f8b\u5c3a\uff1a5\u00c5\uff1b<\/p>\n

(g) (d-f)\u4e2d\u6cbf\u7740\u84dd\u7ebf\u7684\u5f3a\u5ea6\u5206\u5e03\u548c\u6a21\u62df\u7ed3\u679c\u3002\u63d2\u56fe\u663e\u793a\u4e86 (100)\u8868\u9762\u4e0a\u4e09\u5c42Pt\u58f3\u7684\u6a21\u62df\u56fe\u50cf\u3002<\/p>\n

\u56fe4. \u6c27\u8bf1\u5bfc\u6838\u58f3\u5f62\u6210\u8fc7\u7a0b\u4e2d\u7684\u7ed3\u6784\u6f14\u5316<\/strong><\/p>\n

\"\"<\/p>\n

(a) \u6709\u5e8f\u91d1\u5c5e\u95f4Pt3<\/sub>Co\u76f8\u7684\u51e0\u4e2a\u53ef\u80fd\u8868\u9762\u4e0a\u5f62\u6210\u80fd\u7684DFT\u8ba1\u7b97\u7ed3\u679c\uff1b<\/p>\n

(b) Pt3<\/sub>Co NPs\u4e2d\u6c27\u9a71\u52a8\u7684\u6838-\u58f3\u5f62\u6210\u8fc7\u7a0b\u793a\u610f\u56fe\u3002<\/p>\n

\u3010\u5c0f\u7ed3\u3011<\/strong><\/p>\n

\u672c\u6587\u501f\u52a9\u539f\u4f4d\u900f\u5c04\u7535\u5b50\u663e\u5fae\u955c\u548c\u5bc6\u5ea6\u6cdb\u51fd\u7406\u8bba\u8ba1\u7b97\u63ed\u793a\u4e86\u5e38\u538b\u9ad8\u6e29\u4e0bPt-Co\u7eb3\u7c73\u9897\u7c92\u58f3\u6838\u7ed3\u6784\u7684\u5f62\u6210\u8fc7\u7a0b\u3002\u9996\u5148\u8868\u9762\u91d1\u5c5ePt\u8584\u5c42\u53d1\u751f\u504f\u6790\uff0c\u540c\u65f6\u91d1\u5c5e\u95f4\u5185\u6838\u8fdb\u884c\u6709\u5e8f\u5316\u8fc7\u7a0b\uff0c\u968f\u540e\u5728\u6c27\u9000\u706b\u5904\u7406\u671f\u95f4\u901a\u8fc7Ostwald\u719f\u5316\u9010\u5c42\u751f\u957fPt\u58f3\u5c42\uff0c\u6700\u7ec8\u751f\u6210\u6838\u58f3\u7ed3\u6784\u7684Pt3<\/sub>Co\u7eb3\u7c73\u9897\u7c92\u3002\u8be5\u53d1\u73b0\u5bf9\u4e8e\u672a\u6765\u8bbe\u8ba1\u7ed3\u6784\u5316\u7684\u94c2\u5408\u91d1\u7eb3\u7c73\u50ac\u5316\u5242\u63d0\u4f9b\u4e86\u4e00\u5b9a\u7684\u601d\u8def\u53c2\u8003\u3002<\/p>\n

\u6587\u732e\u94fe\u63a5\uff1aIn situ atomic-scale observation of oxygen-driven core-shell formation in Pt3<\/sub>Co nanoparticles<\/a><\/strong>\u00a0(Nat. Commun., 2017, DOI: 10.1038\/s41467-017-00161-y)<\/p>\n

\u672c\u6587\u7531\u6750\u6599\u4eba\u7f16\u8f91\u90e8\u5f20\u6770\u7f16\u8bd1\uff0c\u5468\u68a6\u9752\u5ba1\u6838\uff0c\u70b9\u6211\u52a0\u5165\u6750\u6599\u4eba\u7f16\u8f91\u90e8<\/a>\u3002<\/p>\n

\u6750\u6599\u6d4b\u8bd5\uff0c\u6570\u636e\u5206\u6790\uff0c\u4e0a\u6d4b\u8bd5\u8c37<\/a><\/span>\uff01<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

\u3010\u5f15\u8a00\u3011 \u91d1\u5c5e\u94c2(Pt)\u662f\u6700\u4e3a\u5e38\u7528\u7684\u71c3\u6599\u7535\u6c60\u50ac\u5316\u5242\uff0c\u7136\u800c\u76f8\u5bf9\u6709\u9650\u7684\u50a8\u91cf\u548c\u76f8\u5bf9\u8f83\u9ad8\u7684\u6210\u672c\u5f88\u5927\u7a0b\u5ea6\u4e0a\u9650\u5236\u4e86\u71c3\u6599\u7535\u6c60\u7684\u5168\u9762\u666e\u53ca\u3002\u6838\u58f3\u7ed3\u6784\u7684\u94c2-\u91d1\u5c5e\u7eb3\u7c73\u9897\u7c92\u4e0d\u4ec5\u6210\u672c\u76f8\u5bf9…<\/p>\n","protected":false},"author":230,"featured_media":95747,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[215,2],"tags":[33],"class_list":["post-95745","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-jiedu","category-keji","tag-nano"],"_links":{"self":[{"href":"http:\/\/www.cailiaoniu.com\/index.php?rest_route=\/wp\/v2\/posts\/95745"}],"collection":[{"href":"http:\/\/www.cailiaoniu.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.cailiaoniu.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.cailiaoniu.com\/index.php?rest_route=\/wp\/v2\/users\/230"}],"replies":[{"embeddable":true,"href":"http:\/\/www.cailiaoniu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=95745"}],"version-history":[{"count":4,"href":"http:\/\/www.cailiaoniu.com\/index.php?rest_route=\/wp\/v2\/posts\/95745\/revisions"}],"predecessor-version":[{"id":96383,"href":"http:\/\/www.cailiaoniu.com\/index.php?rest_route=\/wp\/v2\/posts\/95745\/revisions\/96383"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.cailiaoniu.com\/index.php?rest_route=\/wp\/v2\/media\/95747"}],"wp:attachment":[{"href":"http:\/\/www.cailiaoniu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=95745"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.cailiaoniu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=95745"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.cailiaoniu.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=95745"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}