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Designed Formation of Hollow Pt Nanocrystals Supported on MoOx-Modified Carbon for High-Performance Methanol Electro-Oxidation
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2018-09-19 00:00:00 , DOI: 10.1021/acssuschemeng.8b02567
Zhenzhen Yang 1 , Mengmeng Li 1 , Peng Cui 1 , Genlei Zhang 1 , Xinde Jiang 2 , Yuxin Wang 3
Affiliation  

In this study, we develop an efficient electrocatalyst for methanol oxidation, Pt nanocrystals (NCs) with hollow structure immobilized on MoOx-modified carbon black (h-Pt/MoOx-C). The MoOx-C is fabricated by phosphomolybdic acid self-assembly on carbon black. The h-Pt/MoOx-C evolved from [email protected] core–shell NCs deposited on MoOx-C in saturated NaCl aqueous solution containing NH4OH. Because of the presence of MoOx, the electrocatalyst of solid Pt NCs anchored on MoOx-C (Pt/MoOx-C) for methanol oxidation exhibits about 3.4 times higher electrocatalytic activity than solid Pt NCs anchored on carbon black (Pt/C–H). The mass activity of h-Pt/MoOx-C is 2.4 times greater than that of Pt/MoOx-C, ascribing to the unique hollow structure. Furthermore, the h-Pt/MoOx-C also exhibits better tolerance to poisoning species and is more stable under electro-oxidation conditions.

中文翻译:

MoO x修饰碳负载的Pt空心纳米晶体的设计形成,用于高效甲醇电氧化

在这项研究中,我们开发了一种高效的甲醇氧化电催化剂,具有中空结构的Pt纳米晶体(NCs)固定在MoO x-改性炭黑(h-Pt / MoO x -C)上。MoO x -C是通过磷钼酸自组装在炭黑上制成的。h-Pt / MoO x -C由沉积在MoO x -C上的[电子邮件保护]核-壳NC演化而来,该NCs位于含有NH 4 OH的饱和NaCl水溶液中。由于MoO x的存在,固体Pt NCs的电催化剂锚定在MoO x -C(Pt / MoO x-C)对甲醇的氧化显示出比固定在炭黑上的固体Pt NCs(Pt / C–H)高约3.4倍的电催化活性。H-的Pt的质量活性/的MoO X -C比的Pt /的MoO更大2.4倍X -C,归咎于以独特的中空结构。此外,h-Pt / MoO x -C还表现出对中毒物质的更好耐受性,并且在电氧化条件下更稳定。
更新日期:2018-09-19
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