Enhancing effects of edge-N in Pt-based carbon support on hydrogen evolution reaction

被引：0

作者：

Luo, Xianyou ^{[1
,2
,3
]}

Cao, Bokai ^{[3
]}

Fayaz, Muhammad ^{[3
]}

Lai, Wende ^{[3
]}

Du, Baodong ^{[3
]}

Zheng, Heng ^{[3
]}

Xiong, Xunhui ^{[1
]}

Chen, Yong ^{[2
,3
]}

机构：

[1] South China Univ Technol, Sch Environm & Energy, Guangzhou 510640, Peoples R China

[2] Foshan Univ, Sch Mat & Energy, Foshan 528000, Peoples R China

[3] Hainan Univ, Hainan Prov Key Lab Res Utilizat Si Zr Ti Resource, Haikou 570228, Peoples R China

来源：

SURFACES AND INTERFACES | 2025年 / 56卷

基金：

中国国家自然科学基金;

关键词：

Carbon support; Edge-N; Hydrogen evolution reaction; Pt/C catalyst; RAMAN-SPECTROSCOPY; WATER; DURABILITY; REDUCTION; CATALYSTS; NITROGEN; ELECTROCATALYSTS; SUPERCAPACITOR; EXCHANGE; BIOMASS;

D O I：

10.1016/j.surfin.2024.105499

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

N-doped carbons have been widely employed as support materials for metal-based catalysts. However, the specific impact of edge-N in Pt-based carbon supports for hydrogen evolution reaction (HER) has rarely been systematically studied. In this study, activated carbon (AC) from coconut shells was used as a model support. Edge-N-dominated carbon supports (NAC) were obtained by calcining a mixture of melamine and AC. Furthermore, the NAC was annealed at 1200 degrees C to generate N-deficient NAC-1200. Structural analyses revealed that the incorporation of edge-N not only reduces the Pt particle size but also enhances Pt dispersion and anchoring. Consequently, the optimized Pt/NAC catalyst demonstrated a smaller overpotential of 44 mV in contrast to Pt/AC (81 mV) and Pt/NAC-1200 (69 mV). Moreover, the Pt/NAC catalyst exhibited a lower activation energy of 27.11 kJ mol-1 compared to Pt/AC (30.43 kJ mol-1) during the HER process, along with significantly enhanced HER stability. Theoretical calculations further confirmed the critical role of edge-N species, particularly pyridinic-N, in tuning the electronic structure and reducing the reaction barrier of the Pt/ C catalyst, thus greatly enhancing HER performance. This study provides valuable insights for the development of advanced edge-N-dominated carbon supports.

引用

页数：10

共 67 条

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