{"id":230134,"date":"2021-11-29T06:30:25","date_gmt":"2021-11-28T22:30:25","guid":{"rendered":"\/\/m.iemloyee.com\/?p=230134"},"modified":"2021-11-28T21:30:35","modified_gmt":"2021-11-28T13:30:35","slug":"%e5%93%88%e5%b7%a5%e5%a4%a7%e6%9d%9c%e6%98%a5%e9%9b%a8%e5%9b%a2%e9%98%9fnat-commun-%ef%bc%9a%e5%9f%ba%e5%ba%95%e5%ba%94%e5%8f%98%e8%b0%83%e6%8e%a7cun2c2%e5%8d%95%e5%8e%9f%e5%ad%90%e4%bd%8d%e7%82%b9","status":"publish","type":"post","link":"\/\/m.iemloyee.com\/?p=230134","title":{"rendered":"\u54c8\u5de5\u5927\u675c\u6625\u96e8\u56e2\u961fNat. Commun.\uff1a\u57fa\u5e95\u5e94\u53d8\u8c03\u63a7CuN2C2\u5355\u539f\u5b50\u4f4d\u70b9\u7684\u539f\u4f4d\u51e0\u4f55\u7578\u53d8\u548c\u6c27\u8fd8\u539f\u6d3b\u6027"},"content":{"rendered":"

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

\u5206\u6563\u5728\u5bfc\u7535\u78b3\u57fa\u5e95\u4e0a\u7684\u5355\u539f\u5b50\u50ac\u5316\u5242\uff08SACs\uff09\u5177\u6709\u4e30\u5bcc\u7684\u91d1\u5c5e\u4e2d\u5fc3\u6c27\u5316\u8fd8\u539f\u548c\u914d\u4f4d\u5316\u5b66\uff0c\u5728\u6c27\u8fd8\u539f\u3001\u6790\u6c27\u548c\u4e8c\u6c27\u5316\u78b3\u8fd8\u539f\u7b49\u4f17\u591a\u80fd\u91cf\u8f6c\u6362\u53cd\u5e94\u4e2d\u8868\u73b0\u51fa\u72ec\u7279\u7684\u50ac\u5316\u6d3b\u6027\u548c\u9009\u62e9\u6027\u3002\u56e0\u6b64\uff0c\u5355\u539f\u5b50\u50ac\u5316\u5df2\u6210\u4e3a\u80fd\u6e90\u8f6c\u6362\u50ac\u5316\u9886\u57df\u6700\u6d3b\u8dc3\u7684\u524d\u6cbf\u9886\u57df\u3002\u5c3d\u7ba1\u505a\u51fa\u4e86\u5de8\u5927\u7684\u52aa\u529b\uff0c\u4f46\u6784\u5efa\u5355\u539f\u5b50\u4f4d\u70b9\u7684\u4e00\u822c\u65b9\u6cd5\u5728\u8c03\u6574SACs\u7684\u6d3b\u6027\u548c\u9009\u62e9\u6027\u65b9\u9762\u7f3a\u4e4f\u6548\u7387\u3002\u5168\u9762\u4e86\u89e3\u5355\u539f\u5b50\u6d3b\u6027\u4f4d\u70b9\u7684\u50ac\u5316\u884c\u4e3a\u548c\u7ed3\u6784\u529f\u80fd\u5173\u7cfb\u662f\u5408\u7406\u8bbe\u8ba1\u548c\u6784\u5efa\u9ad8\u6548SACs\u7684\u524d\u63d0\u3002\u7136\u800c\uff0c\u7531\u4e8eSACs\u590d\u6742\u7684\u6d3b\u6027\u4f4d\u70b9\u7ed3\u6784\u548c\u590d\u6742\u7684\u53cd\u5e94\u6761\u4ef6\uff0c\u8fd9\u79cd\u7406\u89e3\u4ecd\u7136\u662f\u4e00\u4e2a\u5de8\u5927\u7684\u6311\u6218\u3002\u4f5c\u4e3a\u4e86\u89e3SACs\u50ac\u5316\u884c\u4e3a\u7684\u6700\u65b0\u8fdb\u5c55\uff0c\u8fd1\u5e74\u6765\u5229\u7528\u5148\u8fdb\u7684\u8868\u5f81\u6280\u672f\uff0c\u7279\u522b\u662fX\u5c04\u7ebf\u5438\u6536\u5149\u8c31\uff08XAS\uff09\uff0c\u5bf9\u64cd\u4f5c\u8fc7\u7a0b\u4e2d\u6d3b\u6027\u4f4d\u70b9\u7684\u52a8\u6001\u6f14\u53d8\u8fdb\u884c\u4e86\u63a2\u6d4b\u3002\u4f8b\u5982\uff0c\u53d1\u73b0Fe-N-C SACs\u4e2d\u7684Fe\u4e2d\u5fc3\u4f1a\u53d1\u751fFe2+<\/sup>\/Fe3+<\/sup>\u8f6c\u53d8\uff0c\u5728\u6c27\u8fd8\u539f\u53cd\u5e94\uff08ORR\uff09\u4e2d\uff0c\u4e9a\u94c1\u6001\u662f\u771f\u6b63\u7684\u6d3b\u6027\u4f4d\u70b9\u3002\u5bf9\u4e8eRuN4<\/sub>\u00a0SACs\u50ac\u5316\u7684\u6790\u6c27\u53cd\u5e94\uff0c\u89c2\u5bdf\u5230\u989d\u5916\u7684O\u5438\u9644\u8bf1\u5bfc\u6d3b\u6027\u4f4d\u70b9\u7684\u539f\u4f4d\u91cd\u5efa\uff0c\u5f62\u6210\u7684O-RuN4<\/sub>\u57fa\u56e2\u5927\u5927\u63d0\u9ad8\u4e86\u6d3b\u6027\u3002\u8fd9\u4e9b\u52a8\u6001\u50ac\u5316\u884c\u4e3a\u4e3a\u6d3b\u6027\u4f4d\u70b9\u7684\u786e\u5b9a\u548c\u53cd\u5e94\u673a\u7406\u7684\u7406\u89e3\u63d0\u4f9b\u4e86\u5b9d\u8d35\u7684\u4fe1\u606f\u3002\u7136\u800c\uff0c\u4e0d\u540c\u50ac\u5316\u884c\u4e3a\u4e0b\u7684\u8be6\u7ec6\u7ed3\u6784-\u529f\u80fd\u5173\u7cfb\u4ecd\u4e0d\u6e05\u695a\u3002\u5c3d\u7ba1\u5df2\u6709\u7814\u7a76\u8bc1\u660e\u78b3\u57fa\u5e95\u5bf9SACs\u7684\u6027\u80fd\u6709\u5f88\u5f3a\u7684\u5f71\u54cd\uff0c\u4f46\u662f\u78b3\u57fa\u5e95\u7ed3\u6784\u4e0e\u539f\u4f4d\u50ac\u5316\u884c\u4e3a\u4e4b\u95f4\u7684\u5173\u7cfb\u5c1a\u672a\u5f15\u8d77\u4eba\u4eec\u7684\u91cd\u89c6\u3002\u77f3\u58a8\u70ef\u548c\u78b3\u7eb3\u7c73\u7ba1\uff08CNT\uff09\u5177\u6709\u5747\u5300\u7684sp2<\/sup>\u6742\u5316\u78b3\u9aa8\u67b6\u7ed3\u6784\uff0c\u4e3a\u7814\u7a76SACs\u7684\u7ed3\u6784-\u529f\u80fd\u5173\u7cfb\u63d0\u4f9b\u4e86\u7406\u60f3\u7684\u6a21\u578b\u57fa\u5e95\u3002\u4e0e\u77f3\u58a8\u70ef\u76f8\u6bd4\uff0cCNT\u7531\u4e8e\u51e0\u4f55\u5f2f\u66f2\uff0c\u5177\u6709\u66f4\u591a\u7684sp3<\/sup>\u7c7bC\u539f\u5b50\u548c\u5e94\u53d8\u7684C-C\u952e\u3002\u5f2f\u66f2\u7684\u78b3\u57fa\u5e95\u53ef\u80fd\u5bfc\u81f4\u6d3b\u6027\u4f4d\u70b9\u7684\u72ec\u7279\u52a8\u6001\u6f14\u53d8\uff0c\u4ece\u800c\u64cd\u7eb5SACs\u7684\u50ac\u5316\u8fc7\u7a0b\u3002<\/p>\n

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

\u8fd1\u65e5\uff0c\u5728\u54c8\u5c14\u6ee8\u5de5\u4e1a<\/b><\/strong>\u5927\u5b66\u675c\u6625\u96e8\u6559\u6388<\/b><\/strong>\u56e2\u961f\u7b49\u4eba\u5e26\u9886\u4e0b\uff0c\u5c55\u793a\u4e86CuN2<\/sub>C2<\/sub>\u4f4d\u70b9\u5728\u539f\u4f4d\u6c27\u8fd8\u539f\u53cd\u5e94\u8fc7\u7a0b\u4e2d\u7684\u52a8\u6001\u884c\u4e3a\uff0c\u63ed\u793a\u4e86\u6d3b\u6027\u4f4d\u70b9\u7684\u57fa\u5e95\u5e94\u53d8\u8c03\u8c10\u51e0\u4f55\u7578\u53d8\u53ca\u5176\u4e0e\u6d3b\u6027\u7684\u76f8\u5173\u6027\u3002\u6700\u597d\u7684CuN2<\/sub>C2<\/sub>\u4f4d\u70b9\u4f4d\u4e8e\u76f4\u5f84\u4e3a8 nm\u7684\u78b3\u7eb3\u7c73\u7ba1\u4e0a\uff0c\u76f8\u5bf9\u4e8e\u77f3\u58a8\u70ef\uff0c\u5176\u6d3b\u6027\u63d0\u9ad8\u4e866\u500d\u3002\u5bc6\u5ea6\u6cdb\u51fd\u7406\u8bba\u548cX\u5c04\u7ebf\u5438\u6536\u5149\u8c31\u8868\u660e\uff0c\u5408\u7406\u7684\u57fa\u5e95\u5e94\u53d8\u53ef\u4ee5\u4f18\u5316\u53d8\u5f62\uff0c\u5176\u4e2dCu\u4e0eO\u7ed3\u5408\u7262\u56fa\uff0c\u540c\u65f6\u4fdd\u6301\u4e0eC\/N\u539f\u5b50\u7684\u7d27\u5bc6\u914d\u4f4d\u3002\u4f18\u5316\u7684\u7578\u53d8\u6709\u5229\u4e8e\u7535\u5b50\u4eceCu\u8f6c\u79fb\u5230\u5438\u9644\u7684O\u4e0a\uff0c\u5927\u5927\u63d0\u5347\u4e86\u6c27\u7684\u8fd8\u539f\u6d3b\u6027\u3002\u8fd9\u9879\u5de5\u4f5c\u63ed\u793a\u4e86\u5355\u539f\u5b50\u50ac\u5316\u5242\u5728\u78b3\u5e95\u65b9\u9762\u7684\u7ed3\u6784-\u529f\u80fd\u5173\u7cfb\uff0c\u5e76\u4e3a\u5176\u672a\u6765\u7684\u8bbe\u8ba1\u548c\u6d3b\u6027\u63d0\u5347\u63d0\u4f9b\u4e86\u6307\u5bfc\u3002\u8be5\u6210\u679c\u4ee5\u9898\u4e3a\u201c<\/b><\/strong>Substrate strain tunes operando geometric distortion and oxygen reduction activity of CuN<\/strong>2<\/sub><\/strong>C<\/strong>2<\/sub><\/strong>\u00a0single-atom sites<\/strong>\u201d<\/b><\/strong>\u53d1\u8868\u5728\u4e86Nat. Commun.<\/b><\/strong>\u4e0a\u3002\"\"<\/p>\n

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

\u56fe<\/strong>1 CuN<\/strong>2<\/sub><\/strong>C<\/strong>2<\/sub><\/strong>\u6d3b\u6027\u4f4d\u70b9\u5728\u4e0d\u540csp<\/strong>2<\/sup><\/strong>\u6742\u5316\u78b3\u9aa8\u67b6\u4e0a\u5438\u9644O<\/strong>2<\/sub><\/strong>\u65f6\u7684\u7ed3\u6784\u53d8\u5f62\u793a\u610f\u56fe<\/strong>\"\"<\/p>\n

\u4ece\u77f3\u58a8\u70ef\uff08\u5de6\uff09\u5230\u5c0f\u76f4\u5f84\u78b3\u7eb3\u7c73\u7ba1\uff08\u53f3\uff09\uff0c\u968f\u7740\u57fa\u5e95\u66f2\u7387\u5f15\u8d77\u7684\u5e94\u53d8\u589e\u52a0\uff0c\u53d8\u5f62\u66f4\u52a0\u4e25\u91cd\u3002<\/p>\n

\u56fe<\/strong>2 Cu\/G\u548c\u4e24\u4e2aCu\/CNT\u6837\u54c1\u7684\u6c27\u8fd8\u539f\u6d3b\u6027<\/strong>\"\"<\/p>\n

a\uff09ORR \u6781\u5316\u66f2\u7ebf\u3002<\/p>\n

b\uff09\u52a8\u529b\u5b66\u7535\u6d41\u5bc6\u5ea6\u66f2\u7ebf\u3002<\/p>\n

c\uff09\u5728E1\/2<\/sub>\u3001Eonset<\/sub>\u30010.85 V\u4e0b\u7684MA\u548cTOF\u3002<\/p>\n

\u56fe<\/strong>3 Cu-SAC<\/strong>s<\/strong>\u7684\u8868\u5f81<\/strong>\"\"<\/p>\n

a-f\uff09Cu\/G (a, d)\u3001Cu\/CNT-8 (b, e) \u548cCu\/CNT-4 (c, f)\u7684TEM\u56fe\u50cfa-c\uff09\uff0c\u63d2\u56fe\u4e3a\u76f8\u5e94\u7684SAED\u56fe\u6848\u548c\uff08d-f\uff09\u7403\u5dee\u6821\u6b63\u540e\u7684\u7684HAADF-STEM\u56fe\u50cf\uff08d-f\uff09\u3002<\/p>\n

g\uff09Cu-SACs\u7684Cu 2p\u548cCu XPS\u7684LMM\u4fc4\u6b47\u5149\u8c31\u3002<\/p>\n

h\uff09Cu-SACs\u7684Cu K K\u8fb9XANES\u5149\u8c31\uff0c\u5176\u4e2dCu\u3001Cu2O\u548cCuO\u4f5c\u4e3a\u53c2\u8003\u3002<\/p>\n

i\uff09Cu-SACs\u7684R\u7a7a\u95f4Cu K\u8fb9EXAFS\u5149\u8c31\u3002<\/p>\n

\u56fe<\/strong>4 \u5173\u4e8e\u80fd\u91cf\u3001\u7535\u5b50\u7ed3\u6784\u548c\u51e0\u4f55\u5206\u6790\u7684DFT\u8ba1\u7b97<\/strong>\"\"<\/p>\n

a\uff09CuN2<\/sub>C2<\/sub>\u6d3b\u6027\u4f4d\u70b9\u7684ORR\u8fc7\u7a0b\u8bf4\u660e\u3002<\/p>\n

b\uff09Cu\/CNT-8\u3001Cu\/CNT-4\u3001Cu\/G\u7684ORR\u81ea\u7531\u80fd\u56fe\u3002<\/p>\n

c\uff09\u542bO2*\u7684\u4e09\u79cd\u6a21\u578b\u7535\u8377\u5bc6\u5ea6\u5dee\u7684\u4fa7\u89c6\u56fe\u548c\u4fef\u89c6\u56fe\uff0c\u5176\u4e2d\u9ec4\u8272\u548c\u84dd\u8272\u533a\u57df\u5206\u522b\u4ee3\u8868\u8f83\u9ad8\u548c\u8f83\u4f4e\u7684\u7535\u8377\u5bc6\u5ea6\u3002<\/p>\n

d\uff09\u4e09\u79cd\u6a21\u578b\u5728ORR\u4e0d\u540c\u9636\u6bb5CuN2<\/sub>C2<\/sub>\u6d3b\u6027\u4f4d\u70b9\u7684\u51e0\u4f55\u63cf\u8ff0\u7b26\u03b8\uff08\u63d2\u56fe\uff1a\u7528\u4e8e\u51e0\u4f55\u5206\u6790\u7684\u6a21\u578b\u56fe\u793a\uff09\u3002<\/p>\n

\u56fe<\/strong>5<\/strong>\u00a0Cu\/CNT-8\u7684XAFS\u8868\u5f81<\/strong>\"\"<\/p>\n

a,b\uff09\u539f\u4f4d\u548c\u975e\u539f\u4f4dCu K\u8fb9 (a) XANES\u548c(b) Cu\/CNT-8\u7684EXAFS\u3002<\/p>\n

c\uff09Cu\/CNT-8\u539f\u4f4dR-\u7a7a\u95f4EXAFS\u8c31\u7684\u62df\u5408<\/p>\n

d\uff09\u6bd4\u8f83\u4eceEXAFS\u62df\u5408\u548cDFT\u8ba1\u7b97\u5f97\u5230\u7684Cu-N\u952e\u957f\u3002<\/p>\n

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

\u7efc\u4e0a\u6240\u8ff0\uff0c\u56e2\u961f\u4ee5\u5206\u6563\u5728\u4e0d\u540csp2<\/sup>\u6742\u5316\u78b3\u57fa\u677f\u4e0a\u7684\u5355\u539f\u5b50\u94dc\u4e3a\u6a21\u578b\uff0c\u8bc1\u660e\u4e86\u5355\u539f\u5b50CuN2<\/sub>C2<\/sub>\u6d3b\u6027\u4f4d\u70b9\u7684\u51e0\u4f55\u7578\u53d8\u4e0eORR\u6d3b\u6027\u7684\u5173\u7cfb\u3002\u78b3\u57fa\u677f\u7684\u51e0\u4f55\u53d8\u5f62\u4e0e\u5f2f\u66f2\u7684\u626d\u8f6c\u5e94\u53d8\u6b63\u76f8\u5173\uff0c\u8fd9\u662f\u7531\u4e8e\u5f2f\u66f2\u57fa\u5e95\u5177\u6709\u91ca\u653e\u5e94\u53d8\u7684\u70ed\u529b\u5b66\u503e\u5411\u3002\u7528\u5408\u9002\u7684\u5e94\u53d8\u8c03\u6574\u78b3\u57fa\u5e95\uff0c\u53ef\u4ee5\u5728\u5b9e\u73b0\u5f3aCu-O\u76f8\u4e92\u4f5c\u7528\u548c\u4fdd\u6301\u4e0e\u539f\u6765\u5468\u56f4\u539f\u5b50\u7684\u5927\u91cfCu\u952e\u4e4b\u95f4\u8fbe\u5230\u4e00\u4e2a\u5fae\u5999\u7684\u5e73\u8861\u3002\u8fd9\u79cd\u5e73\u8861\u4f7f\u5f97\u7535\u8377\u6700\u5927\u5316\u7684\u4eceCu\u539f\u5b50\u8f6c\u79fb\u5230O2<\/sub>\uff0c\u4ece\u800c\u6781\u5927\u5730\u6709\u5229\u4e8eORR\u6d3b\u6027\u3002\u8be5\u5de5\u4f5c\u63ed\u793a\u4e86SACs\u5728\u78b3\u57fa\u5e95\u4e0a\u7684\u7ed3\u6784-\u529f\u80fd\u5173\u7cfb\uff0c\u5e76\u4e3a\u78b3\u57fa\u5e95\u5bf9\u5d4c\u5165\u5355\u539f\u5b50\u6d3b\u6027\u4f4d\u70b9\u7684\u6d3b\u6027\u8868\u8fbe\u673a\u5236\u63d0\u4f9b\u4e86\u65b0\u7684\u89c1\u89e3\uff0c\u8fd9\u53ef\u80fd\u4f1a\u6269\u5c55\u5230\u5176\u4ed6\u50ac\u5316\u4f53\u7cfb\u3002\u8fd9\u4e00\u53d1\u73b0\u4e3a\u8fdb\u4e00\u6b65\u8bbe\u8ba1\u548c\u4fc3\u8fdbSACs\u6d3b\u6027\u63d0\u4f9b\u4e86\u65b0\u7684\u9014\u5f84\u3002<\/p>\n

\u6587\u732e\u94fe\u63a5<\/b><\/strong>\uff1aSubstrate strain tunes operando geometric distortion and oxygen reduction activity of CuN<\/u>2<\/sub><\/u>C<\/u>2<\/sub><\/u>\u00a0single-atom sites<\/u><\/a>\uff08Nat. Commun.\uff0c2021\uff0cDOI\uff1a10.1038\/s41467-021-26747-1\uff09<\/p>\n

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