Highly dispersed ultrafine shell-like nano-Pt with efficient hydrogen evolution via metal boron organic polymers,Journal of Materials Chemistry A

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Highly dispersed ultrafine shell-like nano-Pt with efficient hydrogen evolution via metal boron organic polymers
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2020/03/16 , DOI: 10.1039/d0ta02110e
Xue Zhao _{1,

2,

3,

4} , Ziqiong Yang _{1,

2,

3,

4} , Wenjing Wang _{4,

5,

6,

7,

8} , Yuxin Li _{4,

9,

10,

11,

12} , Xiaohai Zhou _{1,

2,

3,

4,

13} , Haibo Zhang _{1,

2,

3,

4,

14}

Affiliation

Hydrogen is considered as the most promising sustainable and economical energy source that can be used on a large scale as an alternative to fossil fuels, but its production requires additional catalysts. As an outstanding catalyst in the hydrogen evolution reaction, increasing the surface atomic ratio of Pt clusters can further improve its catalytic performance for the hydrogen evolution reaction. Here, using metal boron organic polymers (MBOPs) as bifunctional precursors (both reducing and self-supporting properties), a new approach to rapid large-scale preparation of supported Pt-based catalysts (Pt/MBOPs) with hydrogen evolution activity and stability is presented. First, the Pt nanoparticles in Pt/MBOPs with high dispersion and small particle size showed excellent catalytic performance in the electrochemical hydrogen evolution reaction (E-HER), with an overpotential as low as 22.8 mV (at 10 mA cm⁻²) and a Tafel slope of only 56 mV dec⁻¹. In addition, Pt/MBOPs also show extraordinary performance in the decomposition of ammonia borane (a hydrogen storage chemical), and the TOF from ammonia borane to H₂ is as high as 1654.9 mol_H₂ mol_Pt⁻¹ min⁻¹. It is worth noting that Pt/MBOPs show outstanding stability in electrochemical water splitting to hydrogen and ammonia borane hydrolysis, and are an efficient catalyst in industrial production or the immediate hydrogen production field.

中文翻译：

高度分散的超细壳状纳米铂，可通过金属硼有机聚合物有效释放氢

氢被认为是最有前途的可持续和经济能源，可以大规模地用作化石燃料的替代品，但其生产需要额外的催化剂。作为制氢反应中的杰出催化剂，提高Pt簇的表面原子比可以进一步提高其对制氢反应的催化性能。在这里，使用金属硼有机聚合物（MBOPs）作为双功能前体（兼具还原性和自支撑性），快速大规模制备具有析氢活性和稳定性的负载型Pt基催化剂（Pt / MBOPs）的新方法是呈现。第一，^-2）和Tafel斜率仅为56 mV dec^-1。另外，Pt / MBOP在氨硼烷（储氢化学品）的分解中也显示出非凡的性能，并且从氨硼烷到H₂的TOF高达1654.9mol_{H ₂} mol_Pt^-1 min^-1。值得注意的是，Pt / MBOPs在电化学水分解为氢和氨硼烷水解中显示出出色的稳定性，并且在工业生产或直接制氢领域是一种有效的催化剂。

更新日期：2020-04-15

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