Designed Formation of Hollow Pt Nanocrystals Supported on MoOx-Modified Carbon for High-Performance Methanol Electro-Oxidation,ACS Sustainable Chemistry & Engineering

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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 MoO_x-modified carbon black (h-Pt/MoO_x-C). The MoO_x-C is fabricated by phosphomolybdic acid self-assembly on carbon black. The h-Pt/MoO_x-C evolved from [email protected] core–shell NCs deposited on MoO_x-C in saturated NaCl aqueous solution containing NH₄OH. Because of the presence of MoO_x, the electrocatalyst of solid Pt NCs anchored on MoO_x-C (Pt/MoO_x-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/MoO_x-C is 2.4 times greater than that of Pt/MoO_x-C, ascribing to the unique hollow structure. Furthermore, the h-Pt/MoO_x-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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