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\u3010\u6210\u679c\u7b80\u4ecb\u3011<\/strong><\/p>\n \u8fd1\u65e5\uff0c\u5317\u4eac\u5316\u5de5\u5927\u5b66\u803f\u5efa\u65b0\u6559\u6388\u3001\u4e0a\u6d77\u5927\u5b66\u77f3\u56fd\u5347\u7814\u7a76\u5458<\/strong>\u8054\u5408\u62a5\u9053\u901a\u8fc7\u535f\u5549\u4e0e\u77f3\u58a8\u70ef\u8fde\u63a5\u7684\u94b4\u5355\u539f\u5b50\u50ac\u5316\u5242\uff08SAC\uff09\u7684\u805a\u96c6\u4f53\u53ef\u4ee5\u514b\u670d\u4e0e\u50ac\u5316\u5242\/\u53cd\u5e94\u7269\u5c3a\u5bf8\u4e0d\u5339\u914d\u76f8\u5173\u7684\u6311\u6218\u3002\u539f\u5b50\u5206\u8fa8\u7387TEM\u548cXPS\u5149\u8c31\u6d4b\u91cf\u8868\u660eSAC\u805a\u96c6\u4f53\u4e2d\u5b58\u5728\u7684Co\u539f\u5b50\u4f5c\u4e3a\u5355\u4e2a\u539f\u5b50\u5b58\u5728\uff0c\u5176\u7a7a\u95f4\u5206\u8fa8\u5c3a\u5bf8\u4e0e\u786b\u6b63\u6781\u4e2d\u53d1\u73b0\u7684\u786b\u7269\u79cd\u76f8\u79f0\uff0c\u56e0\u6b64\u5b8c\u5168\u53ef\u4ee5\u5b9e\u73b0100%\u539f\u5b50\u7535\u50ac\u5316\u7684\u5229\u7528\u6548\u7387\u3002DFT\u8ba1\u7b97\u8868\u660e\uff0cCo SAC \u805a\u96c6\u4f53\u53ef\u4ee5\u4ee5\u534f\u540c\u65b9\u5f0f\u4e0e\u786b\u76f8\u4e92\u4f5c\u7528\uff0c\u4ece\u800c\u589e\u5f3a\u7535\u50ac\u5316\u6548\u679c\u5e76\u63d0\u9ad8\u786b\u6b63\u6781\u7684\u6027\u80fd\u3002\u4f8b\u5982\uff0c\u7531Co SAC\u805a\u96c6\u4f53\u5236\u5907\u7684Li-S\u7535\u6c60\u8868\u73b0\u51fa\u51fa\u8272\u7684\u5bb9\u91cf\u4fdd\u6301\u7387\uff08\u53730.5 C\u4e0b600\u6b21\u5faa\u73af\u540e505 mAh g-1<\/sup>\uff09\u548c\u51fa\u8272\u7684\u500d\u7387\u6027\u80fd\uff08\u53736 C\u4e0b648 mAh g-1<\/sup>\uff09\u3002\u572811.8 mg cm-2<\/sup>\u7684\u9ad8\u786b\u8d1f\u8f7d\u91cf\u4e0b\u5b9e\u73b0\u4e8612.52 mA h cm-2<\/sup>\u7684\u8d85\u9ad8\u9762\u79ef\u6bd4\u5bb9\u91cf\u3002\u8be5\u8bba\u6587\u4ee5\u9898\u4e3a\u201cSingle-Atom Catalyst Aggregates: Size-Matching is Critical to Electrocatalytic Performance in Sulfur Cathodes<\/strong>\u53d1\u8868\u5728\u77e5\u540d\u671f\u520aAdvanced Science<\/strong>\u4e0a\u3002<\/p>\n \u3010\u56fe\u6587\u5bfc\u8bfb\u3011<\/strong><\/p>\n \u56fe\u4e00\u3001\u4e0d\u540c\u5f62\u5f0f\u7684<\/strong>SAC<\/strong>\u7684\u5408\u6210\u548c\u591a\u786b\u5316\u7269\u5438\u6536\u7684\u793a\u610f\u56fe<\/strong><\/p>\n \uff08a\uff09\u4f7f\u7528\u6c34\u6eb6\u6027Co(II)\u535f\u5549\u590d\u5408\u7269\u5236\u5907Co SACs\uff08\u5373Co-NG(400)\u548cCo-NG(800)\uff09\u7684\u5408\u6210\u8def\u7ebf\u3002<\/p>\n \uff08b\uff09\u663e\u793a\u591a\u786b\u5316\u7269\u5bf9\u4ee5\u805a\u96c6\uff08\u5de6\uff09\u6216\u5206\u79bb\uff08\u53f3\uff09\u5f62\u5f0f\u5b58\u5728\u7684SAC\u7684\u4e0d\u540c\u5438\u6536\u65b9\u5f0f\u7684\u793a\u610f\u56fe\u3002<\/p>\n \u56fe\u4e8c\u3001<\/strong>Co-NG(800)<\/strong>\u7535\u50ac\u5316\u5242\u7684\u8868\u5f81<\/strong><\/p>\n \uff08a-b\uff09Co-NG(800)\u7684TEM\u56fe\u50cf\u548c\u4e0d\u540c\u5143\u7d20\u7684mapping\u56fe\u50cf\u3002<\/p>\n \uff08c-d\uff09\u5728\u4e0d\u540c\u653e\u5927\u500d\u6570\u4e0b\u8bb0\u5f55\u7684Co-NG(800)\u7684HAADF-STEM\u56fe\u50cf\u3002<\/p>\n \uff08e\uff09Co-NG(800)\u3001NG\u548cG\uff08\u6307\u793a\uff09\u7684N 1s XPS\u5149\u8c31\u3002<\/p>\n \uff08f\uff09Co-NG(800)\u3001Co3<\/sub>O4<\/sub>\u548cCo\u7b94\u7684Co K-edge XANES\u5149\u8c31\u3002<\/p>\n \uff08g\uff09\u4ecek3<\/sup>\u52a0\u6743EXAFS\u6570\u636e\u548c\u76f8\u5e94\u7684\u62df\u5408\u66f2\u7ebf\u83b7\u5f97\u7684FT\u5149\u8c31\u3002<\/p>\n \uff08h\uff09Co-NG(800)\u7684EXAFS\u7684WT\u7b49\u9ad8\u7ebf\u56fe\u3002<\/p>\n \u56fe\u4e09\u3001<\/strong>Li-S<\/strong>\u7535\u6c60\u7684\u7535\u5316\u5b66\u6027\u80fd\u8868\u5f81<\/strong><\/p>\n \uff08a\uff09\u4e0d\u540c\u9634\u6781\u4ee50.1 mV s-1<\/sup>\u7684\u626b\u63cf\u901f\u7387\u8bb0\u5f55\u7684CV\u66f2\u7ebf\u3002<\/p>\n \uff08b\uff09\u4e0d\u540c\u9634\u6781\u57280.1 C\u4e0b\u8bb0\u5f55\u7684\u5145\/\u653e\u7535\u66f2\u7ebf\u3002<\/p>\n \uff08c\uff09\u8bb0\u5f55\u4e0d\u540c\u9634\u6781\u7684\u500d\u7387\u6027\u80fd\u3002<\/p>\n \uff08d\uff09S@Co-NG\uff08800\uff09\u9634\u6781\u57280.2 C\u30010.5 C\u30011 C\u30012 C\u30014 C\u548c6 C\u4e0b\u7684\u5145\/\u653e\u7535\u66f2\u7ebf\u3002<\/p>\n \uff08e\uff09\u4e0d\u540c\u9634\u6781\u5728\u4e0d\u540c\u7535\u6d41\u7387\u4e0b\u8bb0\u5f55\u7684\u7535\u4f4d\u95f4\u9699\u6c47\u603b\u3002<\/p>\n \uff08f\uff09\u4f7f\u7528\u4e0d\u540c\u9634\u6781\u5236\u5907\u7684\u7535\u6c60\u57280.5 C\u4e0b\u8bb0\u5f55\u7684\u5faa\u73af\u8bd5\u9a8c\u3002<\/p>\n \uff08g\uff09\u4f7f\u7528S@Co-NG(800)\u5236\u5907\u7684\u7535\u6c60\u5728\u4e0d\u540c\u9ad8\u786b\u8d1f\u8377\u4e0b\u57280.1 C\u65f6\u7684\u5faa\u73af\u8bb0\u5f55\u3002<\/p>\n \u56fe\u56db\u3001\u4f7f\u7528\u4e09\u7535\u6781\u7cfb\u7edf\u7684\u7535\u50ac\u5316\u8868\u5f81<\/strong><\/p>\n \uff08a\uff09Co-NG(800)\u3001NG\u548cG\u7535\u6781\u57281 mV s-1<\/sup>\u7684\u626b\u63cf\u901f\u7387\u4e0b\u8bb0\u5f55CV\u66f2\u7ebf\u3002<\/p>\n \uff08b-d\uff09Co-NG(800)\u3001NG\u548cG\u7535\u6781\u57281\u30014\u30019\u300116\u300125\u300136\u548c49 mV s-1<\/sup>\u7684\u4e00\u7cfb\u5217\u626b\u63cf\u901f\u7387\u4e0b\u8bb0\u5f55\u7684CV\u66f2\u7ebf\u3002<\/p>\n \uff08e-f\uff09\u4ece\u6c27\u5316\u5cf0D\u6216\u8fd8\u539f\u5cf0A\u5bfc\u51fa\u7684I<\/em>p<\/sub>\u503c\u56fe\uff0c\u4f5c\u4e3a\u4e0d\u540c\u7535\u6781v<\/em>1\/2<\/sup>\u7684\u51fd\u6570\u3002<\/p>\n \u56fe\u4e94\u3001\u4e0d\u540c\u7535\u6781\u6052\u7535\u4f4d\u7684<\/strong>Li2<\/sub>S<\/strong>\u6c89\u6dc0<\/strong><\/p>\n \uff08a\uff09Co-NG(800)\u7535\u6781\u3002<\/p>\n \uff08b\uff09NG\u7535\u6781\u3002<\/p>\n \uff08c\uff09G\u7535\u6781\u3002<\/p>\n \u56fe\u516d\u3001\u7535\u50ac\u5316\u8868\u5f81<\/strong><\/p>\n \uff08a\uff09S\u3001S@G\u3001S@NG\u548cS@Co-NG(800)\u7684S k-edge XANES\u5149\u8c31\u3002<\/p>\n \uff08b\uff09\u6536\u96c6\u7684Co K-edge XANES\u5149\u8c31\u7684\u5145\u7535\/\u653e\u7535\u66f2\u7ebf\u663e\u793a\u4e86\u4e00\u7cfb\u5217\u7535\u5316\u5b66\u72b6\u6001\u3002<\/p>\n \uff08c\uff09\u5728S@Co-NG(800)\u9634\u6781\u4e0d\u540c\u7535\u5316\u5b66\u72b6\u6001\u4e0b\u6536\u96c6\u7684Co K-edge XANES\u5149\u8c31\u3002<\/p>\n \uff08d\uff09Co K-edge XANES\u5149\u8c31\u7684\u524d\u8fb9\u7f18\u533a\u57df\u7684\u653e\u5927\u56fe\u3002<\/p>\n \u56fe\u4e03\u3001<\/strong>DFT<\/strong>\u6570\u636e\u7528\u4e8e\u5206\u6790\u5438\u9644\u548c\u7535\u50ac\u5316\u6548\u679c<\/strong><\/p>\n \uff08a\uff09Li2<\/sub>S6<\/sub>\u5206\u5b50\u5728Co-NG-1.37\u3001Co-NG-0.40\u548cCo-NG-0.32\u4e0a\u6700\u7a33\u5b9a\u7684\u5438\u9644\u6784\u578b\u7684\u9876\u90e8\u548c\u4fa7\u9762\u56fe\u3002<\/p>\n \uff08b\uff09\u8ba1\u7b97\u4e86\u4e0d\u540c\u5e95\u7269\u4e0a\u4e0d\u540c\u786b\u7269\u79cd\u7684E<\/em>b<\/sub>\u503c\u3002<\/p>\n \uff08c\uff09\u653e\u7535\u8fc7\u7a0b\u4e2d\u7684\u987a\u5e8f\u53cd\u5e94\uff0c\u4ee5\u53ca\u5728\u4e0d\u540c\u5e95\u7269\u548c\u5b64\u7acb\u72b6\u6001\u8ba1\u7b97\u7684\u5bf9\u5e94\u0394G<\/em>\u503c\u3002<\/p>\n \u3010\u7ed3\u8bba\u5c55\u671b\u3011<\/strong><\/p>\n \u7efc\u4e0a\u6240\u8ff0\uff0c\u77f3\u58a8\u70ef\u4e0a\u7684Co SACs\u7684\u805a\u96c6\u7531\u6613\u4e8e\u83b7\u5f97\u7684\u8bd5\u5242\u5408\u6210\uff0c\u5305\u62ecCo\uff08II\uff09\u535f\u5549\u590d\u5408\u7269\u548cGO\u3002\u77f3\u58a8\u70ef\u7247\u4e0a\u7684Co\u539f\u5b50\u53ef\u4ee5\u5728\u52a0\u70ed\u65f6\u8fc1\u79fb\u548c\u805a\u96c6\uff0c\u4f46\u7531\u4e8e\u91d1\u5c5e\u7684\u56fa\u6709\u914d\u4f4d\u73af\u5883\uff0c\u9632\u6b62\u5728\u805a\u96c6\u4f53\u4e2d\u5f62\u6210Co-Co\u952e\u3002DFT\u8ba1\u7b97\u8868\u660e\uff0cCo\u539f\u5b50\u53ef\u4ee5\u4e0e\u76f8\u5bf9\u8f83\u5927\u7684\u53cd\u5e94\u7269\u786b\u7269\u79cd\u5f62\u6210\u534f\u540c\u4f5c\u7528\uff0c\u4ece\u800c\u4f7f\u7535\u50ac\u5316\u6548\u5e94\u6700\u5927\u5316\u3002\u4e00\u7cfb\u5217\u4e09\u7535\u6781\u6d4b\u91cf\u548cLi2<\/sub>S\u6c89\u6dc0\u8bd5\u9a8c\u8868\u660e\uff0c\u4e0e\u542b\u6709\u4ee5\u5b64\u7acb\u5f62\u5f0f\u7684CO SACs\u7684\u5bf9\u7167\u7535\u6781\u76f8\u6bd4\uff0c\u542b\u6709Co SACs\u805a\u96c6\u4f53\u7684\u7535\u6781\u8868\u73b0\u51fa\u66f4\u5feb\u7684Li+<\/sup>\u6269\u6563\u7cfb\u6570\u548c\u589e\u52a0\u7684Li2<\/sub>S\u6c89\u6dc0\u3002\u4f7f\u7528Co-NG\uff08800\uff09\u4e3a\u4e3b\u4f53\u5236\u5907\u7684Li-S\u7535\u6c60\u4e5f\u8868\u73b0\u51fa\u51fa\u8272\u7684\u6027\u80fd\u6307\u6807\uff0c\u5305\u62ec\u9ad8\u6bd4\u5bb9\u91cf\uff081346 mA h g-1<\/sup>\uff0c0.1 C\uff09\uff0c\u9ad8\u901f\u5bb9\u91cf\uff08648 mA h g-1<\/sup>\uff0c6 C\uff09\uff0c\u4f18\u5f02\u7684\u5faa\u73af\u7a33\u5b9a\u6027\uff08600\u6b21\u5faa\u73af\u540e505 mA h g-1<\/sup>\uff0c\u5bf9\u5e94\u4e8e\u6bcf\u5faa\u73af\u4ec50.08\uff05\u7684\u8870\u51cf\uff09\u3002\u6b64\u5916\uff0c\u4eceLi-S\u6c60\u4e2d\u6d4b\u91cf\u4e8612.52 mA h cm-2<\/sup>\u7684\u8d85\u9ad8\u533a\u57df\u5bb9\u91cf\uff0c\u9ad8\u786b\u8f7d\u8377\u4e3a11.8 mg cm-2<\/sup>\u3002\u603b\u7684\u6765\u8bf4\uff0c\u8fd9\u4e9b\u7ed3\u679c\u4e3aLi-S\u7535\u6c60\u7684\u786b\u9634\u6781\u4e2d\u7684\u7535\u50ac\u5316\u8fc7\u7a0b\u63d0\u4f9b\u4e86\u65b0\u7684\u89c1\u89e3\uff0c\u5e76\u4e14\u6240\u8ff0\u65b9\u6cd5\u63cf\u8ff0\u4e86\u4e00\u79cd\u7528\u4e8e\u9002\u5e94\u5f53\u4ee3\u7535\u50ac\u5316\u53cd\u5e94\u4e2d\u7684\u5176\u4ed6SACs\u7684\u4e00\u822c\u7b56\u7565\u3002<\/p>\n \u6587\u732e\u94fe\u63a5\uff1aSingle-Atom Catalyst Aggregates: Size-Matching is Critical to Electrocatalytic Performance in Sulfur Cathodes<\/a> (Adv. Sci.<\/em>, 2021<\/strong>, DOI: 10.1002\/advs.202103773)<\/p>\n \u672c\u6587\u7531\u5927\u5175\u54e5\u4f9b\u7a3f\u3002<\/p>\n<\/p>\n
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