Carbon core-shell Pt nanoparticle embedded porphyrin Co-MOF derived N-doped porous carbon for the alkaline AEM water electrolyzer application
Carbon core-shell Pt nanoparticle embedded porphyrin Co-MOF derived N-doped porous carbon for the alkaline AEM water electrolyzer application
复制标题
用于碱性 AEM 水电解槽应用的碳核壳 Pt 纳米粒子嵌入卟啉 Co-MOF 衍生的 N 掺杂多孔碳
DOI：
10.1039/d3ta06745a
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发表时间：
2024
影响因子：
11.9
通讯作者：
Subramaniam M
中科院分区：
文献类型：
--
作者：
Subramaniam M
使用高效耐用的电催化剂生产工业清洁氢气（H2）是开发未来可再生能源系统的基本目标。在此，我们报道了通过在 600-800 °C 下热解 Pt-苯胺络合物/Co-MOF 进行析氢反应 (HER)，合成了嵌入卟啉钴 (Co) 金属有机骨架 (MOF) 衍生的氮掺杂多孔碳 (Pt@Co-NPC) 的碳核壳铂 (Pt) 纳米颗粒。在1.0 M KOH电解质介质中，与带有碳载体的商业Pt纳米颗粒（Pt/C）相比，所得的Pt@Co-NPC-800电催化剂实现了34 mV的低过电势，达到10 mA cm−2，塔菲尔斜率为42.72 mV dec−1，并且在100和200 mA cm−2的电流密度下具有超过96小时的良好稳定性。值得注意的是，具有均匀分布的 Pt@Co 纳米结构的高表面积（263.40 m2 g−1）多孔碳材料提供了更好的 HER 电催化活性。此外，密度泛函理论（DFT）计算表明，Pt@Co-NPC-800电催化剂的HER活性的提高源于Pt和Co之间增强的协同效应，这导致Pt活性位点对H*吸附有利的吉布斯自由能值为-0.120 eV。此外，所制造的阴离子交换膜水电解槽（AEMWE）在 2.34 V 电池、1.0 M KOH、60 °C 下实现了～1.32 A cm−2 的电流密度。设计的 Pt@Co-NPC-800 电催化剂为制造高效 AEMWE 提供了新方向。
Industrial clean hydrogen (H2) production using efficient and durable electrocatalysts is an essential goal for developing future renewable energy systems. Herein, we report the synthesis of carbon core–shell platinum (Pt) nanoparticles embedded in porphyrin cobalt (Co) metal–organic framework (MOF) derived nitrogen-doped porous carbon (Pt@Co-NPC) via pyrolysis of Pt–aniline complex/Co-MOF at 600–800 °C for the H2 evolution reaction (HER). In 1.0 M KOH electrolyte medium, the resulting Pt@Co-NPC-800 electrocatalyst achieved a low overpotential of 34 mV to reach 10 mA cm−2, together with a Tafel slope of 42.72 mV dec−1, and good stability for more than 96 h at a current density of 100 and 200 mA cm−2 compared to commercial Pt nanoparticles with a carbon support (Pt/C). Notably, high surface area (263.40 m2 g−1) porous carbon materials with uniformly distributed Pt@Co nanostructures provided better HER electrocatalytic activity. Moreover, density functional theory (DFT) calculations reveal that the improved HER activity of the Pt@Co-NPC-800 electrocatalyst arises from the enhanced synergetic effect between the Pt and Co, which induces the favourable Gibbs free-energy value of −0.120 eV for H* adsorption in the Pt active site. Besides, the fabricated anion exchange membrane water electrolyzer (AEMWE) achieved a current density of ∼1.32 A cm−2 at 2.34 Vcell in 1.0 M KOH, 60 °C. The designed Pt@Co-NPC-800 electrocatalyst provides a new direction to make efficient AEMWEs.