Pt decorated 3D vertical graphene nanosheet arrays for efficient methanol oxidation and hydrogen evolution reactions
Pt decorated 3D vertical graphene nanosheet arrays for efficient methanol oxidation and hydrogen evolution reactions
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Pt 装饰的 3D 垂直石墨烯纳米片阵列可实现高效的甲醇氧化和析氢反应
DOI：
10.1039/c7ta07340b
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发表时间：
2017-10
影响因子：
11.9
通讯作者：
Cheng Chuanwei
中科院分区：
文献类型：
--
作者：
Zhang Haifeng;Ren Weina;Guan Cao;Cheng Chuanwei
高活性和耐久的电催化剂对于电化学能量转换装置是高度期望的。在此，我们报告的设计和制造的Pt纳米片装饰的3D垂直石墨烯纳米片阵列支撑在碳布（Pt-VGNSAs/CC）作为一个集成的无粘合剂催化剂的甲醇氧化和析氢反应（HER）。垂直排列的石墨烯纳米片具有大的表面积和优异的导电性，为分散Pt纳米片提供了理想的支撑。结果，与商业Pt/C催化剂相比，所获得的具有优化的Pt负载的Pt-VGNSAs/CC在1050 mA mg-1的高质量活性和1.45 mA cm-2的面积活性、上级CO耐受性和可靠的稳定性方面表现出显著改善的甲醇电氧化性能。此外，Pt-VGNSAs/CC催化剂还显示出良好的电催化活性，在10 mA cm−2时，相对于RHE的起始电位为−60 mV，Tafel斜率为28.5 mV dec−1，并且对HER具有优异的长期稳定性。
Highly active and durable electrocatalysts are highly desirable for electrochemical energy conversion devices. Herein, we report the design and fabrication of Pt nanoplate decorated 3D vertical graphene nanosheet arrays supported on carbon cloth (Pt-VGNSAs/CC) as an integrated binder-free catalyst for both methanol oxidation and hydrogen evolution reactions (HER). The vertically aligned graphene nanosheets with large surface area and excellent conductivity provide an ideal support for dispersing the Pt nanoplates. As a result, the as-obtained Pt-VGNSAs/CC with optimized Pt loading exhibits significantly improved methanol electro-oxidation performance in terms of a high mass activity of 1050 mA mg−1 and areal activity of 1.45 mA cm−2, superior CO tolerance and reliable stability in contrast to those of commercial Pt/C catalysts. In addition, the Pt-VGNSAs/CC catalyst also shows promising electrocatalytic activity with a small onset potential of −60 mV vs. the RHE at 10 mA cm−2, and a low Tafel slope of 28.5 mV dec−1 as well as excellent long-term stability for the HER. The significantly enhanced electrocatalytic performance could be attributed to the structural advantages and strong synergistic effects between graphene and Pt.
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影响因子：
10.9
作者：
S. Choi;M. Seo;H. J. Kim;W. Kim
通讯作者：
S. Choi;M. Seo;H. J. Kim;W. Kim
影响因子：
15
作者：
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通讯作者：
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影响因子：
10.8
作者：
Liu, Lifeng;Pippel, Eckhard;Goesele, Ulrich
通讯作者：
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影响因子：
15
作者：
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通讯作者：
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影响因子：
5.4
作者：
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通讯作者：
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