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class="h pbm"> <h1 class="ph"> 祝贺潘雅楠、杨奇等同学合作研究论文在Energy Advances期刊发表 </h1> <p class="xg2"> <span class="xg1">已有 1194 次阅读</span> <span class="xg1">2024-9-5 20:13</span> <span class="pipe">|</span><span class="xg1">个人分类:<a href="https://blog.sciencenet.cn/home.php?mod=space&uid=311896&do=blog&classid=174877&view=me">点滴成果</a></span><span class="pipe">|</span><span class="xg1">系统分类:<a href="https://blog.sciencenet.cn/home.php?mod=space&do=blog&view=all&uid=311896&catid=11">论文交流</a></span> </p> </div> <div id="blog_article" class="d cl" ><p style="line-height: 200%; text-align: justify;"><strong><span style="font-size:16px;line-height:200%;font-family:'Times New Roman',serif">A multi-metal (Fe, Cu, Zn) coordinated hollow porous dodecahedron nanocage catalyst reduces oxygen in Zn-air battery</span></strong></p><p style="line-height: 200%; text-align: justify;"><span style="font-size:16px;line-height:200%;font-family:'Times New Roman',serif">Yanan Pan <sup>a,1</sup>, Qi Yang <sup>a, 1</sup>, Xiaoying Liu <sup>a</sup>, Fan Qiu <sup>a</sup>, Junjie Chen <sup>a</sup>, Mengdie Yang <sup>a</sup>, Yang Fan<sup> a</sup>, Haiou Song <sup>b</sup>, and Shupeng Zhang<sup> a, </sup></span><sup><span style="font-size:16px;line-height:200%;font-family:'Times New Roman',serif">*</span></sup></p><p style="line-height:200%"><sup><span style="font-size:16px;line-height:200%;font-family:'Times New Roman',serif">1 </span></sup><span style="font-size: 16px;line-height:200%;font-family:'Times New Roman',serif">Y.N Pan and Q. Yang contributed equally to this work.</span></p><p><strong>ABSTRACT</strong></p><p style="text-indent: 32px; line-height: 200%; text-align: justify;"><span style="font-size:16px;line-height:200%;font-family:'Times New Roman',serif">The coupling of low-cost, multiple metals and porous nanocarbon materials, aimed at replacing precious metals to enhance electrocatalytic oxygen reduction, is a critical challenge to some crucial research. This paper constructed a hollow dodecahedron nanocage catalyst (</span><span style="font-size:16px;line-height:200%;font-family:'Times New Roman',serif">Fe<sub>3</sub>O<sub>4</sub>/CuNCs/ZnN<sub>x</sub>-PHNC</span><span style="font-size:16px;line-height:200%;font-family:'Times New Roman',serif">) by supporting copper nanoclusters, Fe<sub>3</sub>O<sub>4</sub> nanoparticles, and Zn-N<sub>X</sub> after sintering and annealing, using the coordination of ZIF-8 and doping copper and iron ions. We observed that the synergy of the multi-metals in the magnetically separable heterojunction catalyst induced an electron transfer and inhibits hydrogen peroxide formation, thus, improving its catalytic performance for </span><span style="font-size:16px;line-height:200%;font-family:'Times New Roman',serif">oxygen reduction reaction</span><span style="font-size:16px;line-height:200%;font-family:'Times New Roman',serif">. Its half-wave potential is as high as 0.832 V, and the Tafel slope is 54 mV/decade, superior to many non-precious metal catalysts in literature. The assembled </span><span style="font-size:16px;line-height:200%;font-family:'Times New Roman',serif">Zn-air battery (ZAB) </span><span style="font-size:16px;line-height:200%;font-family:'Times New Roman',serif">exhibits a maximum power density of 162 mW⸱cm<sup>-2</sup> and ultra-high stability of >500 h at a 5 mA⸱cm<sup>-2</sup> current density. The ZAB’s excellent performance also proves high development and practical application prospects.</span></p><p style="text-indent: 32px; line-height: 200%; text-align: justify;"><span style="font-size:16px;line-height:200%;font-family:'Times New Roman',serif"></span></p><p style="text-indent: 32px; line-height: 200%; text-align: justify;"><span style="font-size:16px;line-height:200%;font-family:'Times New Roman',serif">A heterogeneous skeletonized nanocage catalyst Fe<sub>3</sub>O<sub>4</sub>/CuNCs/ZnN<sub>x</sub>-PHNC loaded with bimetals was prepared by stirring at room temperature and annealed at high temperature with NaCl and KCl as protectants and stripping agents, respectively. The rich active sites produced by the synergistic action of various metals and hollow nanostructures enable the catalysts to show excellent ORR performance. When the prepared materials were used as liquid ZAB cathode catalysts, ZAB exhibited excellent performance with high OCV (1.45 V) and peak power density (162 mW⸱cm<sup>-2</sup>). In addition, the ultra-high specific capacity (760 mA⸱h⸱g<sup>-2</sup>) at a 10 mA⸱cm<sup>-2</sup> current density is far superior to that of the benchmark Pt/C-based catalyst. In addition, the Fe<sub>3</sub>O<sub>4</sub>/CuNCs/ZnN<sub>x</sub>-PHNC-based ZAB was charged and discharged for more than 500 h at a 5 mA⸱cm<sup>-2</sup> current density, achieving high stability and high cycling performance.</span> <span style="font-size:16px;line-height:200%;font-family:'Times New Roman',serif">The excellent performance of the assembled FAZBs also proved their practical application potential as wearable flexible batteries.</span> <span style="font-size: 16px;line-height:200%;font-family:'Times New Roman',serif">Overall, this study provides a feasible way to prepare efficient catalysts for ZABs cathodes to replace noble metal catalysts in practical applications.</span></p><p style="text-indent: 32px; line-height: 200%; text-align: center;"><span style="font-size:16px;line-height:200%;font-family:'Times New Roman',serif"><img src="http://bbs.sciencenet.cn/home.php?mod=attachment&filename=image.png&id=1318219" title="" alt="image.png"/></span></p><p>原文链接：<span style="text-wrap: nowrap;"><a href="https://pubs.rsc.org/en/content/articlelanding/2024/ya/d4ya00295d" target="_blank" target="_blank">https://pubs.rsc.org/en/content/articlelanding/2024/ya/d4ya00295d</a> </span></p><p><span style="text-wrap: nowrap;"></span></p><p><span style="color: #FF0000;">柔性锌空电池可以支持计数器工作。</span> <a href="https://blog.sciencenet.cn/home.php?mod=attachment&id=1318220" target="_blank" class="attach" target="_blank">Video.mp4</a>  </p><p><span style="text-wrap: nowrap;"></span></p> <br /><br /> <label style="font-size:13px; 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