Biomass-derived high-performance tungsten-based electrocatalysts on graphene for hydrogen evolution
Biomass-derived high-performance tungsten-based electrocatalysts on graphene for hydrogen evolution
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DOI：
10.1039/c5ta05589j
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发表时间：
2015-09
影响因子：
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通讯作者：
Fanke Meng;E. Hu;Lihua Zhang;K. Sasaki;J. Muckerman;E. Fujita
中科院分区：
文献类型：
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作者：
Fanke Meng;E. Hu;Lihua Zhang;K. Sasaki;J. Muckerman;E. Fujita
我们报道了一类新的高活性和稳定的钨基催化剂，以取代贵金属材料在酸性电解质中的析氢反应（HER）。这种催化剂是通过加热一种富含钨酸铵、豆粉和石墨烯纳米片（WSoyGnP）的低成本混合物而制成的。催化剂化合物由碳化钨（W2C和WC）和氮化钨（WN）纳米颗粒装饰在石墨烯纳米片上。该催化剂的过电位（η10，电流密度为10 mA cm−2时的电位）为0.105 V，是酸性介质中钨基HER催化剂中过电位最小的。与石墨烯的偶联显著降低了电荷转移电阻，增加了产物的活性表面积，有利于提高HER活性。因此，采用生物质和其他较便宜的材料作为前驱体生产高HER活性催化剂的方法，为制氢工业设计和开发高效催化剂提供了新的途径。
We report a new class of highly active and stable tungsten-based catalysts to replace noble metal materials for the hydrogen evolution reaction (HER) in an acidic electrolyte. The catalyst is produced by heating an earth-abundant and low-cost mixture of ammonium tungstate, soybean powder and graphene nanoplatelets (WSoyGnP). The catalyst compound consists of tungsten carbide (W2C and WC) and tungsten nitride (WN) nanoparticles decorated on graphene nanoplatelets. The catalyst demonstrates an overpotential (η10, the potential at a current density of 10 mA cm−2) of 0.105 V, which is the smallest among tungsten-based HER catalysts in acidic media. The coupling with graphene significantly reduces the charge transfer resistance and increases the active surface area of the product, which are favorable for enhancing the HER activity. Therefore, the approach of employing biomass and other less expensive materials as precursors for the production of catalysts with high HER activity provides a new path for the design and development of efficient catalysts for the hydrogen production industry.