Ultrafine molybdenum phosphide nanocrystals on a highly porous N,P-codoped carbon matrix as an efficient catalyst for the hydrogen evolution reaction†,Materials Chemistry Frontiers

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Ultrafine molybdenum phosphide nanocrystals on a highly porous N,P-codoped carbon matrix as an efficient catalyst for the hydrogen evolution reaction†
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2018-06-25 00:00:00 , DOI: 10.1039/c8qm00226f
Jin-Tao Ren _{1,

2,

3,

4,

5} , Lei Chen _{1,

2,

3,

4,

5} , Chen-Chen Weng _{1,

2,

3,

4,

5} , Zhong-Yong Yuan _{1,

2,

3,

4,

5}

Affiliation

High-performance and affordable electrocatalysts from earth-enriched materials are desirable for many sustainable energy conversion and storage systems. Highly crystalline MoP nanocrystals with ultrasmall sizes embedded in an N,P-codoped carbon matrix (MoP@NPCS) were designed and fabricated for hydrogen evolution. Due to the highly active catalytic nature of the MoP nanocrystals, the ultrasmall MoP nanoparticles on the conductive carbon matrix, the high surface area of the carbon matrix with abundant N and P dopants, and the strong coupling effect between the MoP nanoparticles and the carbon matrix, the designed MoP@NPCS catalysts show excellent hydrogen evolution behaviour, with an onset potential of −47 mV and an overpotential of 107 mV, to achieve a current density of 10 mA cm⁻² in 1.0 M KOH, along with robust operational durability. Specially, the fabricated N,P-codoped carbon matrix (NPCS) exhibits high OER catalytic activity with an overpotential of 390 mV to afford 10 mA cm⁻² and excellent stability. Finally, a two-electrode electrolyzer using MoP@NPCS and NPCS as the cathode and anode electrodes, respectively, requires a low voltage of 1.70 V to achieve 10 mA cm⁻² over long-term operation. Due to this impressive performance, MoP@NPCS is a promising electrocatalyst for practical hydrogen production from electrocatalytic water splitting.

中文翻译：

高度多孔的N，P掺杂碳基体上的超细磷化钼纳米晶体可作为制氢反应的有效催化剂†

对于许多可持续的能源转换和存储系统而言，由富含地球的材料制成的高性能且价格适中的电催化剂是理想的。设计并制造了具有超小尺寸的高结晶度MoP纳米晶体，嵌入N，P掺杂的碳基体（MoP @ NPCS）中以释放氢。由于MoP纳米晶体的高催化活性，导电碳基质上的超小MoP纳米颗粒，具有丰富N和P掺杂剂的碳基质的高表面积以及MoP纳米颗粒与碳基质之间的强耦合作用，设计的MoP @ NPCS催化剂表现出优异的析氢性能，起始电势为-47 mV，过电势为107 mV，可实现10 mA cm ^-2的电流密度在1.0 M KOH中具有强大的操作耐久性。特别地，所制造的N，P共掺杂的碳基质（NPCS）显示出高的OER催化活性，具有390mV的过电势以提供10mA cm ^-2和优异的稳定性。最后，分别使用MoP @ NPCS和NPCS作为阴极和阳极的两电极电解槽需要1.70 V的低压才能在长期运行中达到10 mA cm ^-2。由于这一令人印象深刻的性能，MoP @ NPCS是一种有前景的电催化剂，可用于通过电催化水分解生产实际的氢气。

更新日期：2018-06-25

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