{"id":92534,"date":"2017-07-24T06:30:59","date_gmt":"2017-07-23T22:30:59","guid":{"rendered":"\/\/m.iemloyee.com\/?p=92534"},"modified":"2017-07-23T10:47:35","modified_gmt":"2017-07-23T02:47:35","slug":"%e3%80%90%e6%8a%95%e7%a8%bf%e5%be%85%e5%ae%9a%e3%80%91%e5%8a%a0%e5%b7%9e%e5%a4%a7%e5%ad%a6%e5%b0%94%e6%b9%be%e5%88%86%e6%a0%a1%e6%bd%98%e6%99%93%e6%99%b4nano-letters-%e5%8e%9f%e4%bd%8d%e9%80%8f","status":"publish","type":"post","link":"\/\/m.iemloyee.com\/?p=92534","title":{"rendered":"\u52a0\u5dde\u5927\u5b66\u5c14\u6e7e\u5206\u6821\u6f58\u6653\u6674Nano Letters: \u539f\u4f4d\u900f\u5c04\u7535\u955c\u6280\u672f\u63ed\u793aPt-Co\u7eb3\u7c73\u9897\u7c92\u8868\u9762\u7684\u5404\u5411\u5f02\u6027\u6c27\u5316\u884c\u4e3a"},"content":{"rendered":"

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

\u71c3\u6599\u7535\u6c60\u56e0\u5176\u9ad8\u6548\u3001\u4fbf\u643a\u3001\u73af\u5883\u53cb\u597d\u7b49\u4f18\u70b9\uff0c\u5728\u6c7d\u8f66\u5de5\u4e1a\u4e0e\u7535\u5b50\u4ea7\u54c1\u4e2d\u6709\u7740\u5e7f\u6cdb\u7684\u5e94\u7528\u524d\u666f\u3002\u4f5c\u4e3a\u7535\u6c60\u9634\u6781\u6c27\u8fd8\u539f\u53cd\u5e94\uff08ORR\uff09\u7684\u7535\u50ac\u5316\u5242\uff0c\u4e8c\u5143Pt-\u8fc7\u6e21\u91d1\u5c5e\uff08Pt-M\uff09\u9897\u7c92\u7684\u6d3b\u6027\u4e0e\u5bff\u547d\u5219\u662f\u5b9e\u73b0\u71c3\u6599\u7535\u6c60\u5546\u4e1a\u5e94\u7528\u7684\u5173\u952e\uff1aPt-M\u50ac\u5316\u5242\u8868\u9762\u7684\u5143\u7d20\u5206\u5e03\uff0c\u53ca\u5728\u6c27\u5316\u73af\u5883\u4e0b\u7684\u7ed3\u6784\u6f14\u5316\uff0c\u90fd\u4f1a\u76f4\u63a5\u5f71\u54cdORR\u7684\u50ac\u5316\u6d3b\u6027\u548c\u5bff\u547d\u3002<\/p>\n

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

\u8fd1\u65e5\uff0c\u52a0\u5dde\u5927\u5b66\u5c14\u6e7e\u5206\u6821\u6f58\u6653\u6674\u6559\u6388\uff08\u901a\u8baf\u4f5c\u8005\uff09\u8bfe\u9898\u7ec4\u5728Nano Letters\u4e0a\u53d1\u8868\u4e86\u540d\u4e3a\u201cRevealing Surface Elemental Composition and Dynamic Processes Involved in Facet-Dependent Oxidation of Pt3Co Nanoparticles via in Situ Transmission Electron Microscopy\u201d\u7684\u6587\u7ae0\u3002\u7814\u7a76\u4eba\u5458\u5229\u7528\u7403\u5dee\u77eb\u6b63STEM\u4e0eDFT\u7406\u8bba\u8ba1\u7b97\u63ed\u793a\u4e86Pt3Co\u7eb3\u7c73\u9897\u7c92\u8868\u9762Co\u5143\u7d20\u7684\u5404\u9879\u5f02\u6027\u5206\u5e03\uff1aCo\u5143\u7d20\u66f4\u503e\u5411\u4e8e\u5206\u5e03\u5728Pt3Co\u7eb3\u7c73\u9897\u7c92\u7684\uff5b111\uff5d\u8868\u9762\uff0c\u800c\u975e\uff5b100\uff5d\u8868\u9762\u3002\u8fdb\u4e00\u6b65\uff0c\u5229\u7528\u539f\u4f4d\u7535\u955c\u6280\u672f\uff0c\u7814\u7a76\u4eba\u5458\u5728\u539f\u5b50\u5c3a\u5ea6\u89c2\u5bdf\u4e86\u4e00\u4e2a\u5927\u6c14\u538b\u7eaf\u6c27\u73af\u5883\u4e0bPt3Co\u7eb3\u7c73\u9897\u7c92\u7684\u8868\u9762\u6f14\u5316\u884c\u4e3a\uff1a\uff5b111\uff5d\u8868\u9762\u6613\u4e8e\u88ab\u6c27\u5316\uff0c\u5176\u4e2d\u7684Co\u5143\u7d20\u4f1a\u504f\u6790\u81f3\u6700\u5916\u5c42\u8868\u9762\uff0c\u4e0e\u6c27\u7ed3\u5408\u5f62\u6210CoO\u5c42\uff1b\u800c\uff5b100\uff5d\u8868\u9762\u5219\u8868\u73b0\u51fa\u6297\u6c27\u5316\u6027\uff0c\u4f9d\u7136\u66b4\u9732\u51fa\u5bccPt\u8868\u9762\u3002<\/p>\n

\u56fe1 \u539f\u59cbPt3Co\u5408\u91d1\u9897\u7c92\u7684\u8868\u5f81\u7ed3\u679c<\/strong><\/span><\/p>\n

\"\"<\/p>\n

(a) EDS\u7ed3\u679c\u786e\u8ba4\u5316\u5b66\u6210\u5206\uff1b(b) XRD\u8868\u5f81\u7ed3\u679c\uff1b(c) \u7403\u5dee\u77eb\u6b63HAADF-STEM\u5bf9\u5355\u4e2aPt3Co\u9897\u7c92\u7684\u8868\u5f81\u7ed3\u679c\uff1b(d) STEM-EELS\u7ed3\u679c\u663e\u793a\uff1aPt3Co\u9897\u7c92{111}\u8868\u9762\u7684Co\u5143\u7d20\u542b\u91cf\u9ad8\u4e8e{100}\u8868\u9762\uff1b(e) \u56fe(c)\u9897\u7c92\u6240\u5bf9\u5e94\u7684\u539f\u5b50\u6a21\u578b\u793a\u610f\u56fe\u3002<\/p>\n

\u56fe2 Pt3Co\u9897\u7c92\u5728\u4e00\u4e2a\u5927\u6c14\u538b\u6c27\u6c14\u73af\u5883\u4e0b\u7684\u8868\u9762\u6c27\u5316<\/strong><\/span><\/p>\n

\"\"<\/p>\n

(a-b) \u539f\u4f4dHAADF-STEM\u8868\u5f81\u4e0eZ\u886c\u5ea6\u5206\u6790\u663e\u793a\uff1a\u6c27\u5316\u73af\u5883\u4e0b\uff0cPt3Co\u9897\u7c92\u4e2d\u7684Co\u5143\u7d20\u504f\u6790\u81f3{111}\u8868\u9762\uff0c\u800c\u975e{100}\u8868\u9762\uff1b(c-e) \u539f\u4f4d\u7403\u5dee\u77eb\u6b63STEM\u50cf\u786e\u8ba4{111}\u8868\u9762\u5f62\u6210\u7684\u6c27\u5316\u5c42\u4e3aCoO\u3002<\/p>\n

\u56fe3 \u539f\u4f4d\u6c27\u6c14\u73af\u5883\u4e0b\uff0cPt3Co\u9897\u7c92\u8868\u9762\u7684\u8fdb\u4e00\u6b65\u6f14\u5316<\/strong><\/span><\/p>\n

\u00a0\"\"<\/p>\n

\u539f\u4f4d\u7403\u5dee\u77eb\u6b63STEM\u7ed3\u679c\u663e\u793a\uff1a\u6c27\u5316\u73af\u5883\u4e0b\uff0cPt3Co\u9897\u7c92{100}\u5bccPt\u8868\u9762\u7531\u4e8e\u539f\u5b50\u8fc1\u79fb\u53d1\u751f\u8fdb\u4e00\u6b65\u91cd\u6784\uff1b\u800c{111} \u8868\u9762\u7684CoO\u5c42\u963b\u788d\u4e86Pt\u7684\u8fc1\u79fb\u3002<\/p>\n

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

\u672c\u6587\u901a\u8fc7\u626b\u63cf\u900f\u5c04\u7535\u5b50\u663e\u5fae\u5b66\u65b9\u6cd5\uff0c\u5728\u539f\u5b50\u5c3a\u5ea6\u7814\u7a76\u4e86Pt3Co\u50ac\u5316\u5242\u8868\u9762\u7684\u6210\u5206\u5206\u5e03\u4e0e\u52a8\u6001\u7ed3\u6784\u6f14\u5316\u3002\u6240\u63ed\u793a\u7684Co\u7684\u5404\u9879\u5f02\u6027\u5206\u5e03\u3001\u8868\u9762\u7684\u201c\u9009\u62e9\u6027\u201d\u6c27\u5316\u884c\u4e3a\u4e0ePt-M\u9897\u7c92\u5728\u71c3\u6599\u7535\u6c60\u9634\u6781\u7684ORR\u50ac\u5316\u6027\u80fd\u5bc6\u5207\u76f8\u5173\u3002\u7814\u7a76\u8005\u4eec\u5e0c\u671b\u4ee5\u6b64\u4e3aPt\u57fa ORR\u50ac\u5316\u5242\u7684\u8bbe\u8ba1\u4e0e\u5931\u6548\u539f\u7406\u63d0\u4f9b\u501f\u9274\u3002<\/p>\n

\u6587\u732e\u94fe\u63a5\uff1aRevealing Surface Elemental Composition and Dynamic Processes Involved in Facet-Dependent Oxidation of Pt3Co Nanoparticles via in Situ Transmission Electron Microscopy<\/a>\u00a0 \uff08DOI:<\/strong>\u00a0<\/strong>10.1021\/acs.nanolett.7b01325\uff09<\/p>\n

\u6750\u6599\u4eba\u65b0\u80fd\u6e90\u7ec4\u80cc\u9006\u65f6\u5149\u6574\u7406\u7f16\u8f91\u3002<\/p>\n

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