当前位置：
X-MOL 学术
›
J. Colloid Interface Sci.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Metal-organic frameworks derived carbon-incorporated cobalt/dicobalt phosphide microspheres as Mott-Schottky electrocatalyst for efficient and stable hydrogen evolution reaction in wide-pH environment.
Journal of Colloid and Interface Science ( IF 9.4 ) Pub Date : 2020-01-17 , DOI: 10.1016/j.jcis.2020.01.059 Huangze Yu 1 , Junfeng Li 1 , Guoliang Gao 1 , Guang Zhu 2 , Xianghui Wang 1 , Ting Lu 3 , Likun Pan 1
Journal of Colloid and Interface Science ( IF 9.4 ) Pub Date : 2020-01-17 , DOI: 10.1016/j.jcis.2020.01.059 Huangze Yu 1 , Junfeng Li 1 , Guoliang Gao 1 , Guang Zhu 2 , Xianghui Wang 1 , Ting Lu 3 , Likun Pan 1
Affiliation
|
Cobalt phosphides, as low cost and abundant non-noble materials for hydrogen evolution reaction (HER), are always constrained by their inferior charge transfer and sluggish intrinsic electrocatalytic kinetics. In this work, carbon-incorporated Co/Co2P microspheres (Co/Co2P@C) as a novel Mott-Schottky catalyst were synthesized successfully via carbonization and gradual phosphorization of Co based metal-organic frameworks. The unique merits, including Mott-Schottky effect at the interface formed between metal Co and semiconductor Co2P, the incorporated carbon-layer on the surface and the spherical structure endow Co/Co2P@C with favorable electrical conductivity, preferable kinetics and long-term stability when it was evaluated as electrocatalyst for HER in wide-pH range. As a result, the Co/Co2P@C with the optimized phosphorization degree delivers a benchmark current density of 10 mA cm-2 at the low overpotential of 192 and 158 mV in acidic and alkaline electrolytes, respectively, with a remarkable stability (CV cycling for 3000 cycles and continuous electrolysis at the overpotential of 200 mV for 48 h). Therefore, the as-designed Co/Co2P@C should be one of the most promising catalysts for HER application.
中文翻译：
金属有机框架衍生了掺碳的钴/二钴磷化物微球，作为Mott-Schottky电催化剂，可在宽pH条件下高效稳定地发生氢气分解反应。
磷化氢作为低成本的氢生成反应（HER）丰富的非贵重材料，总是受其劣质的电荷转移和缓慢的固有电催化动力学特性所限制。在这项工作中，通过钴基金属-有机骨架的碳化和逐步磷化，成功地合成了掺碳的Co / Co2P微球（Co / Co2P @ C）作为新型的Mott-Schottky催化剂。独特的优点包括在金属Co和半导体Co2P之间形成的界面处的Mott-Schottky效应，表面上结合的碳层和球形结构赋予Co / Co2P @ C良好的导电性，良好的动力学性能和长期稳定性在宽pH范围内被评估为HER的电催化剂时。结果是，具有最佳磷化度的Co / Co2P @ C在酸性和碱性电解液中分别在192和158 mV的低过电势下提供10 mA cm-2的基准电流密度，并具有出色的稳定性（CV循环3000个循环和2个循环）。在200 mV的超电势下连续电解48小时）。因此，设计好的Co / Co2P @ C应该是HER应用最有希望的催化剂之一。
更新日期：2020-01-17
中文翻译：
金属有机框架衍生了掺碳的钴/二钴磷化物微球，作为Mott-Schottky电催化剂，可在宽pH条件下高效稳定地发生氢气分解反应。
磷化氢作为低成本的氢生成反应（HER）丰富的非贵重材料，总是受其劣质的电荷转移和缓慢的固有电催化动力学特性所限制。在这项工作中，通过钴基金属-有机骨架的碳化和逐步磷化，成功地合成了掺碳的Co / Co2P微球（Co / Co2P @ C）作为新型的Mott-Schottky催化剂。独特的优点包括在金属Co和半导体Co2P之间形成的界面处的Mott-Schottky效应，表面上结合的碳层和球形结构赋予Co / Co2P @ C良好的导电性，良好的动力学性能和长期稳定性在宽pH范围内被评估为HER的电催化剂时。结果是，具有最佳磷化度的Co / Co2P @ C在酸性和碱性电解液中分别在192和158 mV的低过电势下提供10 mA cm-2的基准电流密度，并具有出色的稳定性（CV循环3000个循环和2个循环）。在200 mV的超电势下连续电解48小时）。因此，设计好的Co / Co2P @ C应该是HER应用最有希望的催化剂之一。
京公网安备 11010802027423号