Porous Boron Carbon Nitride Nanosheets as Efficient Metal-Free Catalysts for the Oxygen Reduction Reaction in Both Alkaline and Acidic Solutions
Porous Boron Carbon Nitride Nanosheets as Efficient Metal-Free Catalysts for the Oxygen Reduction Reaction in Both Alkaline and Acidic Solutions
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DOI：
10.1021/acsenergylett.6b00602
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发表时间：
2017-01
影响因子：
22
通讯作者：
Jiemin Wang;J. Hao;Dan Liu;S. Qin;D. Portehault;Yinwei Li;Y. Chen;W. Lei
中科院分区：
文献类型：
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作者：
Jiemin Wang;J. Hao;Dan Liu;S. Qin;D. Portehault;Yinwei Li;Y. Chen;W. Lei
碳材料作为氧还原反应（ORR）中 Pt/C 催化剂的潜在替代品已成为热门话题。然而，它们大多数仅在碱性溶液中表现出催化活性，这严重限制了它们在聚电解质膜燃料电池中的应用。为了解决这个问题，这里通过一种简便有效的聚合物溶胶-凝胶方法制备了多孔氮化硼碳（BCN）纳米片，该方法涉及聚乙烯醇（PVA）、硼酸、胍和聚（环氧乙烷-环氧丙烷）（P123）凝胶混合物的退火。所制备的多孔 BCN 纳米片具有 817 m2/g 的高表面积，在碱性和酸性介质中均表现出令人印象深刻的 ORR 催化性能，可与商业 Pt/C 和其他最近报道的碳材料相媲美。重要的是，所得的无金属催化剂在碱性和酸性环境中都表现出更高的耐用性和更高的甲醇耐受性。这项研究为无金属 O 提供了新的见解...
Carbon materials have become a hot topic as potential substitutes for Pt/C catalysts for the oxygen reduction reaction (ORR). However, most of them exhibit their catalytic activities only in alkaline solutions, which severely limits their application in polyelectrolyte membrane fuel cells. To address this issue, here porous boron carbon nitride (BCN) nanosheets are fabricated by a facile and efficient polymer sol–gel method, which involves the annealing of polyvinylic akohol (PVA), boric acid, guanidine, and poly(ethylene oxide-co-propylene oxide) (P123) gel mixtures. The as-prepared porous BCN nanosheets possess a high surface area of 817 m2/g and display impressive ORR catalytic performance in both alkaline and acidic media, rivalling that of commercial Pt/C and other recently reported carbon materials. Importantly, the resulting metal-free catalysts exhibit much greater durability and higher methanol tolerance in both alkaline and acidic environments. This study provides a new insight into metal-free O...